1 /* 2 * Remote VUB300 SDIO/SDmem Host Controller Driver 3 * 4 * Copyright (C) 2010 Elan Digital Systems Limited 5 * 6 * based on USB Skeleton driver - 2.2 7 * 8 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com) 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License as 12 * published by the Free Software Foundation, version 2 13 * 14 * VUB300: is a USB 2.0 client device with a single SDIO/SDmem/MMC slot 15 * Any SDIO/SDmem/MMC device plugged into the VUB300 will appear, 16 * by virtue of this driver, to have been plugged into a local 17 * SDIO host controller, similar to, say, a PCI Ricoh controller 18 * This is because this kernel device driver is both a USB 2.0 19 * client device driver AND an MMC host controller driver. Thus 20 * if there is an existing driver for the inserted SDIO/SDmem/MMC 21 * device then that driver will be used by the kernel to manage 22 * the device in exactly the same fashion as if it had been 23 * directly plugged into, say, a local pci bus Ricoh controller 24 * 25 * RANT: this driver was written using a display 128x48 - converting it 26 * to a line width of 80 makes it very difficult to support. In 27 * particular functions have been broken down into sub functions 28 * and the original meaningful names have been shortened into 29 * cryptic ones. 30 * The problem is that executing a fragment of code subject to 31 * two conditions means an indentation of 24, thus leaving only 32 * 56 characters for a C statement. And that is quite ridiculous! 33 * 34 * Data types: data passed to/from the VUB300 is fixed to a number of 35 * bits and driver data fields reflect that limit by using 36 * u8, u16, u32 37 */ 38 #include <linux/kernel.h> 39 #include <linux/errno.h> 40 #include <linux/init.h> 41 #include <linux/slab.h> 42 #include <linux/module.h> 43 #include <linux/kref.h> 44 #include <linux/uaccess.h> 45 #include <linux/usb.h> 46 #include <linux/mutex.h> 47 #include <linux/mmc/host.h> 48 #include <linux/mmc/card.h> 49 #include <linux/mmc/sdio_func.h> 50 #include <linux/mmc/sdio_ids.h> 51 #include <linux/workqueue.h> 52 #include <linux/ctype.h> 53 #include <linux/firmware.h> 54 #include <linux/scatterlist.h> 55 56 struct host_controller_info { 57 u8 info_size; 58 u16 firmware_version; 59 u8 number_of_ports; 60 } __packed; 61 62 #define FIRMWARE_BLOCK_BOUNDARY 1024 63 struct sd_command_header { 64 u8 header_size; 65 u8 header_type; 66 u8 port_number; 67 u8 command_type; /* Bit7 - Rd/Wr */ 68 u8 command_index; 69 u8 transfer_size[4]; /* ReadSize + ReadSize */ 70 u8 response_type; 71 u8 arguments[4]; 72 u8 block_count[2]; 73 u8 block_size[2]; 74 u8 block_boundary[2]; 75 u8 reserved[44]; /* to pad out to 64 bytes */ 76 } __packed; 77 78 struct sd_irqpoll_header { 79 u8 header_size; 80 u8 header_type; 81 u8 port_number; 82 u8 command_type; /* Bit7 - Rd/Wr */ 83 u8 padding[16]; /* don't ask why !! */ 84 u8 poll_timeout_msb; 85 u8 poll_timeout_lsb; 86 u8 reserved[42]; /* to pad out to 64 bytes */ 87 } __packed; 88 89 struct sd_common_header { 90 u8 header_size; 91 u8 header_type; 92 u8 port_number; 93 } __packed; 94 95 struct sd_response_header { 96 u8 header_size; 97 u8 header_type; 98 u8 port_number; 99 u8 command_type; 100 u8 command_index; 101 u8 command_response[0]; 102 } __packed; 103 104 struct sd_status_header { 105 u8 header_size; 106 u8 header_type; 107 u8 port_number; 108 u16 port_flags; 109 u32 sdio_clock; 110 u16 host_header_size; 111 u16 func_header_size; 112 u16 ctrl_header_size; 113 } __packed; 114 115 struct sd_error_header { 116 u8 header_size; 117 u8 header_type; 118 u8 port_number; 119 u8 error_code; 120 } __packed; 121 122 struct sd_interrupt_header { 123 u8 header_size; 124 u8 header_type; 125 u8 port_number; 126 } __packed; 127 128 struct offload_registers_access { 129 u8 command_byte[4]; 130 u8 Respond_Byte[4]; 131 } __packed; 132 133 #define INTERRUPT_REGISTER_ACCESSES 15 134 struct sd_offloaded_interrupt { 135 u8 header_size; 136 u8 header_type; 137 u8 port_number; 138 struct offload_registers_access reg[INTERRUPT_REGISTER_ACCESSES]; 139 } __packed; 140 141 struct sd_register_header { 142 u8 header_size; 143 u8 header_type; 144 u8 port_number; 145 u8 command_type; 146 u8 command_index; 147 u8 command_response[6]; 148 } __packed; 149 150 #define PIGGYBACK_REGISTER_ACCESSES 14 151 struct sd_offloaded_piggyback { 152 struct sd_register_header sdio; 153 struct offload_registers_access reg[PIGGYBACK_REGISTER_ACCESSES]; 154 } __packed; 155 156 union sd_response { 157 struct sd_common_header common; 158 struct sd_status_header status; 159 struct sd_error_header error; 160 struct sd_interrupt_header interrupt; 161 struct sd_response_header response; 162 struct sd_offloaded_interrupt irq; 163 struct sd_offloaded_piggyback pig; 164 } __packed; 165 166 union sd_command { 167 struct sd_command_header head; 168 struct sd_irqpoll_header poll; 169 } __packed; 170 171 enum SD_RESPONSE_TYPE { 172 SDRT_UNSPECIFIED = 0, 173 SDRT_NONE, 174 SDRT_1, 175 SDRT_1B, 176 SDRT_2, 177 SDRT_3, 178 SDRT_4, 179 SDRT_5, 180 SDRT_5B, 181 SDRT_6, 182 SDRT_7, 183 }; 184 185 #define RESPONSE_INTERRUPT 0x01 186 #define RESPONSE_ERROR 0x02 187 #define RESPONSE_STATUS 0x03 188 #define RESPONSE_IRQ_DISABLED 0x05 189 #define RESPONSE_IRQ_ENABLED 0x06 190 #define RESPONSE_PIGGYBACKED 0x07 191 #define RESPONSE_NO_INTERRUPT 0x08 192 #define RESPONSE_PIG_DISABLED 0x09 193 #define RESPONSE_PIG_ENABLED 0x0A 194 #define SD_ERROR_1BIT_TIMEOUT 0x01 195 #define SD_ERROR_4BIT_TIMEOUT 0x02 196 #define SD_ERROR_1BIT_CRC_WRONG 0x03 197 #define SD_ERROR_4BIT_CRC_WRONG 0x04 198 #define SD_ERROR_1BIT_CRC_ERROR 0x05 199 #define SD_ERROR_4BIT_CRC_ERROR 0x06 200 #define SD_ERROR_NO_CMD_ENDBIT 0x07 201 #define SD_ERROR_NO_1BIT_DATEND 0x08 202 #define SD_ERROR_NO_4BIT_DATEND 0x09 203 #define SD_ERROR_1BIT_UNEXPECTED_TIMEOUT 0x0A 204 #define SD_ERROR_4BIT_UNEXPECTED_TIMEOUT 0x0B 205 #define SD_ERROR_ILLEGAL_COMMAND 0x0C 206 #define SD_ERROR_NO_DEVICE 0x0D 207 #define SD_ERROR_TRANSFER_LENGTH 0x0E 208 #define SD_ERROR_1BIT_DATA_TIMEOUT 0x0F 209 #define SD_ERROR_4BIT_DATA_TIMEOUT 0x10 210 #define SD_ERROR_ILLEGAL_STATE 0x11 211 #define SD_ERROR_UNKNOWN_ERROR 0x12 212 #define SD_ERROR_RESERVED_ERROR 0x13 213 #define SD_ERROR_INVALID_FUNCTION 0x14 214 #define SD_ERROR_OUT_OF_RANGE 0x15 215 #define SD_ERROR_STAT_CMD 0x16 216 #define SD_ERROR_STAT_DATA 0x17 217 #define SD_ERROR_STAT_CMD_TIMEOUT 0x18 218 #define SD_ERROR_SDCRDY_STUCK 0x19 219 #define SD_ERROR_UNHANDLED 0x1A 220 #define SD_ERROR_OVERRUN 0x1B 221 #define SD_ERROR_PIO_TIMEOUT 0x1C 222 223 #define FUN(c) (0x000007 & (c->arg>>28)) 224 #define REG(c) (0x01FFFF & (c->arg>>9)) 225 226 static bool limit_speed_to_24_MHz; 227 module_param(limit_speed_to_24_MHz, bool, 0644); 228 MODULE_PARM_DESC(limit_speed_to_24_MHz, "Limit Max SDIO Clock Speed to 24 MHz"); 229 230 static bool pad_input_to_usb_pkt; 231 module_param(pad_input_to_usb_pkt, bool, 0644); 232 MODULE_PARM_DESC(pad_input_to_usb_pkt, 233 "Pad USB data input transfers to whole USB Packet"); 234 235 static bool disable_offload_processing; 236 module_param(disable_offload_processing, bool, 0644); 237 MODULE_PARM_DESC(disable_offload_processing, "Disable Offload Processing"); 238 239 static bool force_1_bit_data_xfers; 240 module_param(force_1_bit_data_xfers, bool, 0644); 241 MODULE_PARM_DESC(force_1_bit_data_xfers, 242 "Force SDIO Data Transfers to 1-bit Mode"); 243 244 static bool force_polling_for_irqs; 245 module_param(force_polling_for_irqs, bool, 0644); 246 MODULE_PARM_DESC(force_polling_for_irqs, "Force Polling for SDIO interrupts"); 247 248 static int firmware_irqpoll_timeout = 1024; 249 module_param(firmware_irqpoll_timeout, int, 0644); 250 MODULE_PARM_DESC(firmware_irqpoll_timeout, "VUB300 firmware irqpoll timeout"); 251 252 static int force_max_req_size = 128; 253 module_param(force_max_req_size, int, 0644); 254 MODULE_PARM_DESC(force_max_req_size, "set max request size in kBytes"); 255 256 #ifdef SMSC_DEVELOPMENT_BOARD 257 static int firmware_rom_wait_states = 0x04; 258 #else 259 static int firmware_rom_wait_states = 0x1C; 260 #endif 261 262 module_param(firmware_rom_wait_states, int, 0644); 263 MODULE_PARM_DESC(firmware_rom_wait_states, 264 "ROM wait states byte=RRRIIEEE (Reserved Internal External)"); 265 266 #define ELAN_VENDOR_ID 0x2201 267 #define VUB300_VENDOR_ID 0x0424 268 #define VUB300_PRODUCT_ID 0x012C 269 static struct usb_device_id vub300_table[] = { 270 {USB_DEVICE(ELAN_VENDOR_ID, VUB300_PRODUCT_ID)}, 271 {USB_DEVICE(VUB300_VENDOR_ID, VUB300_PRODUCT_ID)}, 272 {} /* Terminating entry */ 273 }; 274 MODULE_DEVICE_TABLE(usb, vub300_table); 275 276 static struct workqueue_struct *cmndworkqueue; 277 static struct workqueue_struct *pollworkqueue; 278 static struct workqueue_struct *deadworkqueue; 279 280 static inline int interface_to_InterfaceNumber(struct usb_interface *interface) 281 { 282 if (!interface) 283 return -1; 284 if (!interface->cur_altsetting) 285 return -1; 286 return interface->cur_altsetting->desc.bInterfaceNumber; 287 } 288 289 struct sdio_register { 290 unsigned func_num:3; 291 unsigned sdio_reg:17; 292 unsigned activate:1; 293 unsigned prepared:1; 294 unsigned regvalue:8; 295 unsigned response:8; 296 unsigned sparebit:26; 297 }; 298 299 struct vub300_mmc_host { 300 struct usb_device *udev; 301 struct usb_interface *interface; 302 struct kref kref; 303 struct mutex cmd_mutex; 304 struct mutex irq_mutex; 305 char vub_name[3 + (9 * 8) + 4 + 1]; /* max of 7 sdio fn's */ 306 u8 cmnd_out_ep; /* EndPoint for commands */ 307 u8 cmnd_res_ep; /* EndPoint for responses */ 308 u8 data_out_ep; /* EndPoint for out data */ 309 u8 data_inp_ep; /* EndPoint for inp data */ 310 bool card_powered; 311 bool card_present; 312 bool read_only; 313 bool large_usb_packets; 314 bool app_spec; /* ApplicationSpecific */ 315 bool irq_enabled; /* by the MMC CORE */ 316 bool irq_disabled; /* in the firmware */ 317 unsigned bus_width:4; 318 u8 total_offload_count; 319 u8 dynamic_register_count; 320 u8 resp_len; 321 u32 datasize; 322 int errors; 323 int usb_transport_fail; 324 int usb_timed_out; 325 int irqs_queued; 326 struct sdio_register sdio_register[16]; 327 struct offload_interrupt_function_register { 328 #define MAXREGBITS 4 329 #define MAXREGS (1<<MAXREGBITS) 330 #define MAXREGMASK (MAXREGS-1) 331 u8 offload_count; 332 u32 offload_point; 333 struct offload_registers_access reg[MAXREGS]; 334 } fn[8]; 335 u16 fbs[8]; /* Function Block Size */ 336 struct mmc_command *cmd; 337 struct mmc_request *req; 338 struct mmc_data *data; 339 struct mmc_host *mmc; 340 struct urb *urb; 341 struct urb *command_out_urb; 342 struct urb *command_res_urb; 343 struct completion command_complete; 344 struct completion irqpoll_complete; 345 union sd_command cmnd; 346 union sd_response resp; 347 struct timer_list sg_transfer_timer; 348 struct usb_sg_request sg_request; 349 struct timer_list inactivity_timer; 350 struct work_struct deadwork; 351 struct work_struct cmndwork; 352 struct delayed_work pollwork; 353 struct host_controller_info hc_info; 354 struct sd_status_header system_port_status; 355 u8 padded_buffer[64]; 356 }; 357 358 #define kref_to_vub300_mmc_host(d) container_of(d, struct vub300_mmc_host, kref) 359 #define SET_TRANSFER_PSEUDOCODE 21 360 #define SET_INTERRUPT_PSEUDOCODE 20 361 #define SET_FAILURE_MODE 18 362 #define SET_ROM_WAIT_STATES 16 363 #define SET_IRQ_ENABLE 13 364 #define SET_CLOCK_SPEED 11 365 #define SET_FUNCTION_BLOCK_SIZE 9 366 #define SET_SD_DATA_MODE 6 367 #define SET_SD_POWER 4 368 #define ENTER_DFU_MODE 3 369 #define GET_HC_INF0 1 370 #define GET_SYSTEM_PORT_STATUS 0 371 372 static void vub300_delete(struct kref *kref) 373 { /* kref callback - softirq */ 374 struct vub300_mmc_host *vub300 = kref_to_vub300_mmc_host(kref); 375 struct mmc_host *mmc = vub300->mmc; 376 usb_free_urb(vub300->command_out_urb); 377 vub300->command_out_urb = NULL; 378 usb_free_urb(vub300->command_res_urb); 379 vub300->command_res_urb = NULL; 380 usb_put_dev(vub300->udev); 381 mmc_free_host(mmc); 382 /* 383 * and hence also frees vub300 384 * which is contained at the end of struct mmc 385 */ 386 } 387 388 static void vub300_queue_cmnd_work(struct vub300_mmc_host *vub300) 389 { 390 kref_get(&vub300->kref); 391 if (queue_work(cmndworkqueue, &vub300->cmndwork)) { 392 /* 393 * then the cmndworkqueue was not previously 394 * running and the above get ref is obvious 395 * required and will be put when the thread 396 * terminates by a specific call 397 */ 398 } else { 399 /* 400 * the cmndworkqueue was already running from 401 * a previous invocation and thus to keep the 402 * kref counts correct we must undo the get 403 */ 404 kref_put(&vub300->kref, vub300_delete); 405 } 406 } 407 408 static void vub300_queue_poll_work(struct vub300_mmc_host *vub300, int delay) 409 { 410 kref_get(&vub300->kref); 411 if (queue_delayed_work(pollworkqueue, &vub300->pollwork, delay)) { 412 /* 413 * then the pollworkqueue was not previously 414 * running and the above get ref is obvious 415 * required and will be put when the thread 416 * terminates by a specific call 417 */ 418 } else { 419 /* 420 * the pollworkqueue was already running from 421 * a previous invocation and thus to keep the 422 * kref counts correct we must undo the get 423 */ 424 kref_put(&vub300->kref, vub300_delete); 425 } 426 } 427 428 static void vub300_queue_dead_work(struct vub300_mmc_host *vub300) 429 { 430 kref_get(&vub300->kref); 431 if (queue_work(deadworkqueue, &vub300->deadwork)) { 432 /* 433 * then the deadworkqueue was not previously 434 * running and the above get ref is obvious 435 * required and will be put when the thread 436 * terminates by a specific call 437 */ 438 } else { 439 /* 440 * the deadworkqueue was already running from 441 * a previous invocation and thus to keep the 442 * kref counts correct we must undo the get 443 */ 444 kref_put(&vub300->kref, vub300_delete); 445 } 446 } 447 448 static void irqpoll_res_completed(struct urb *urb) 449 { /* urb completion handler - hardirq */ 450 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context; 451 if (urb->status) 452 vub300->usb_transport_fail = urb->status; 453 complete(&vub300->irqpoll_complete); 454 } 455 456 static void irqpoll_out_completed(struct urb *urb) 457 { /* urb completion handler - hardirq */ 458 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context; 459 if (urb->status) { 460 vub300->usb_transport_fail = urb->status; 461 complete(&vub300->irqpoll_complete); 462 return; 463 } else { 464 int ret; 465 unsigned int pipe = 466 usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep); 467 usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe, 468 &vub300->resp, sizeof(vub300->resp), 469 irqpoll_res_completed, vub300); 470 vub300->command_res_urb->actual_length = 0; 471 ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC); 472 if (ret) { 473 vub300->usb_transport_fail = ret; 474 complete(&vub300->irqpoll_complete); 475 } 476 return; 477 } 478 } 479 480 static void send_irqpoll(struct vub300_mmc_host *vub300) 481 { 482 /* cmd_mutex is held by vub300_pollwork_thread */ 483 int retval; 484 int timeout = 0xFFFF & (0x0001FFFF - firmware_irqpoll_timeout); 485 vub300->cmnd.poll.header_size = 22; 486 vub300->cmnd.poll.header_type = 1; 487 vub300->cmnd.poll.port_number = 0; 488 vub300->cmnd.poll.command_type = 2; 489 vub300->cmnd.poll.poll_timeout_lsb = 0xFF & (unsigned)timeout; 490 vub300->cmnd.poll.poll_timeout_msb = 0xFF & (unsigned)(timeout >> 8); 491 usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev, 492 usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep) 493 , &vub300->cmnd, sizeof(vub300->cmnd) 494 , irqpoll_out_completed, vub300); 495 retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL); 496 if (0 > retval) { 497 vub300->usb_transport_fail = retval; 498 vub300_queue_poll_work(vub300, 1); 499 complete(&vub300->irqpoll_complete); 500 return; 501 } else { 502 return; 503 } 504 } 505 506 static void new_system_port_status(struct vub300_mmc_host *vub300) 507 { 508 int old_card_present = vub300->card_present; 509 int new_card_present = 510 (0x0001 & vub300->system_port_status.port_flags) ? 1 : 0; 511 vub300->read_only = 512 (0x0010 & vub300->system_port_status.port_flags) ? 1 : 0; 513 if (new_card_present && !old_card_present) { 514 dev_info(&vub300->udev->dev, "card just inserted\n"); 515 vub300->card_present = 1; 516 vub300->bus_width = 0; 517 if (disable_offload_processing) 518 strncpy(vub300->vub_name, "EMPTY Processing Disabled", 519 sizeof(vub300->vub_name)); 520 else 521 vub300->vub_name[0] = 0; 522 mmc_detect_change(vub300->mmc, 1); 523 } else if (!new_card_present && old_card_present) { 524 dev_info(&vub300->udev->dev, "card just ejected\n"); 525 vub300->card_present = 0; 526 mmc_detect_change(vub300->mmc, 0); 527 } else { 528 /* no change */ 529 } 530 } 531 532 static void __add_offloaded_reg_to_fifo(struct vub300_mmc_host *vub300, 533 struct offload_registers_access 534 *register_access, u8 func) 535 { 536 u8 r = vub300->fn[func].offload_point + vub300->fn[func].offload_count; 537 memcpy(&vub300->fn[func].reg[MAXREGMASK & r], register_access, 538 sizeof(struct offload_registers_access)); 539 vub300->fn[func].offload_count += 1; 540 vub300->total_offload_count += 1; 541 } 542 543 static void add_offloaded_reg(struct vub300_mmc_host *vub300, 544 struct offload_registers_access *register_access) 545 { 546 u32 Register = ((0x03 & register_access->command_byte[0]) << 15) 547 | ((0xFF & register_access->command_byte[1]) << 7) 548 | ((0xFE & register_access->command_byte[2]) >> 1); 549 u8 func = ((0x70 & register_access->command_byte[0]) >> 4); 550 u8 regs = vub300->dynamic_register_count; 551 u8 i = 0; 552 while (0 < regs-- && 1 == vub300->sdio_register[i].activate) { 553 if (vub300->sdio_register[i].func_num == func && 554 vub300->sdio_register[i].sdio_reg == Register) { 555 if (vub300->sdio_register[i].prepared == 0) 556 vub300->sdio_register[i].prepared = 1; 557 vub300->sdio_register[i].response = 558 register_access->Respond_Byte[2]; 559 vub300->sdio_register[i].regvalue = 560 register_access->Respond_Byte[3]; 561 return; 562 } else { 563 i += 1; 564 continue; 565 } 566 }; 567 __add_offloaded_reg_to_fifo(vub300, register_access, func); 568 } 569 570 static void check_vub300_port_status(struct vub300_mmc_host *vub300) 571 { 572 /* 573 * cmd_mutex is held by vub300_pollwork_thread, 574 * vub300_deadwork_thread or vub300_cmndwork_thread 575 */ 576 int retval; 577 retval = 578 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0), 579 GET_SYSTEM_PORT_STATUS, 580 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 581 0x0000, 0x0000, &vub300->system_port_status, 582 sizeof(vub300->system_port_status), HZ); 583 if (sizeof(vub300->system_port_status) == retval) 584 new_system_port_status(vub300); 585 } 586 587 static void __vub300_irqpoll_response(struct vub300_mmc_host *vub300) 588 { 589 /* cmd_mutex is held by vub300_pollwork_thread */ 590 if (vub300->command_res_urb->actual_length == 0) 591 return; 592 593 switch (vub300->resp.common.header_type) { 594 case RESPONSE_INTERRUPT: 595 mutex_lock(&vub300->irq_mutex); 596 if (vub300->irq_enabled) 597 mmc_signal_sdio_irq(vub300->mmc); 598 else 599 vub300->irqs_queued += 1; 600 vub300->irq_disabled = 1; 601 mutex_unlock(&vub300->irq_mutex); 602 break; 603 case RESPONSE_ERROR: 604 if (vub300->resp.error.error_code == SD_ERROR_NO_DEVICE) 605 check_vub300_port_status(vub300); 606 break; 607 case RESPONSE_STATUS: 608 vub300->system_port_status = vub300->resp.status; 609 new_system_port_status(vub300); 610 if (!vub300->card_present) 611 vub300_queue_poll_work(vub300, HZ / 5); 612 break; 613 case RESPONSE_IRQ_DISABLED: 614 { 615 int offloaded_data_length = vub300->resp.common.header_size - 3; 616 int register_count = offloaded_data_length >> 3; 617 int ri = 0; 618 while (register_count--) { 619 add_offloaded_reg(vub300, &vub300->resp.irq.reg[ri]); 620 ri += 1; 621 } 622 mutex_lock(&vub300->irq_mutex); 623 if (vub300->irq_enabled) 624 mmc_signal_sdio_irq(vub300->mmc); 625 else 626 vub300->irqs_queued += 1; 627 vub300->irq_disabled = 1; 628 mutex_unlock(&vub300->irq_mutex); 629 break; 630 } 631 case RESPONSE_IRQ_ENABLED: 632 { 633 int offloaded_data_length = vub300->resp.common.header_size - 3; 634 int register_count = offloaded_data_length >> 3; 635 int ri = 0; 636 while (register_count--) { 637 add_offloaded_reg(vub300, &vub300->resp.irq.reg[ri]); 638 ri += 1; 639 } 640 mutex_lock(&vub300->irq_mutex); 641 if (vub300->irq_enabled) 642 mmc_signal_sdio_irq(vub300->mmc); 643 else if (vub300->irqs_queued) 644 vub300->irqs_queued += 1; 645 else 646 vub300->irqs_queued += 1; 647 vub300->irq_disabled = 0; 648 mutex_unlock(&vub300->irq_mutex); 649 break; 650 } 651 case RESPONSE_NO_INTERRUPT: 652 vub300_queue_poll_work(vub300, 1); 653 break; 654 default: 655 break; 656 } 657 } 658 659 static void __do_poll(struct vub300_mmc_host *vub300) 660 { 661 /* cmd_mutex is held by vub300_pollwork_thread */ 662 long commretval; 663 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 664 init_completion(&vub300->irqpoll_complete); 665 send_irqpoll(vub300); 666 commretval = wait_for_completion_timeout(&vub300->irqpoll_complete, 667 msecs_to_jiffies(500)); 668 if (vub300->usb_transport_fail) { 669 /* no need to do anything */ 670 } else if (commretval == 0) { 671 vub300->usb_timed_out = 1; 672 usb_kill_urb(vub300->command_out_urb); 673 usb_kill_urb(vub300->command_res_urb); 674 } else if (commretval < 0) { 675 vub300_queue_poll_work(vub300, 1); 676 } else { /* commretval > 0 */ 677 __vub300_irqpoll_response(vub300); 678 } 679 } 680 681 /* this thread runs only when the driver 682 * is trying to poll the device for an IRQ 683 */ 684 static void vub300_pollwork_thread(struct work_struct *work) 685 { /* NOT irq */ 686 struct vub300_mmc_host *vub300 = container_of(work, 687 struct vub300_mmc_host, pollwork.work); 688 if (!vub300->interface) { 689 kref_put(&vub300->kref, vub300_delete); 690 return; 691 } 692 mutex_lock(&vub300->cmd_mutex); 693 if (vub300->cmd) { 694 vub300_queue_poll_work(vub300, 1); 695 } else if (!vub300->card_present) { 696 /* no need to do anything */ 697 } else { /* vub300->card_present */ 698 mutex_lock(&vub300->irq_mutex); 699 if (!vub300->irq_enabled) { 700 mutex_unlock(&vub300->irq_mutex); 701 } else if (vub300->irqs_queued) { 702 vub300->irqs_queued -= 1; 703 mmc_signal_sdio_irq(vub300->mmc); 704 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 705 mutex_unlock(&vub300->irq_mutex); 706 } else { /* NOT vub300->irqs_queued */ 707 mutex_unlock(&vub300->irq_mutex); 708 __do_poll(vub300); 709 } 710 } 711 mutex_unlock(&vub300->cmd_mutex); 712 kref_put(&vub300->kref, vub300_delete); 713 } 714 715 static void vub300_deadwork_thread(struct work_struct *work) 716 { /* NOT irq */ 717 struct vub300_mmc_host *vub300 = 718 container_of(work, struct vub300_mmc_host, deadwork); 719 if (!vub300->interface) { 720 kref_put(&vub300->kref, vub300_delete); 721 return; 722 } 723 mutex_lock(&vub300->cmd_mutex); 724 if (vub300->cmd) { 725 /* 726 * a command got in as the inactivity 727 * timer expired - so we just let the 728 * processing of the command show if 729 * the device is dead 730 */ 731 } else if (vub300->card_present) { 732 check_vub300_port_status(vub300); 733 } else if (vub300->mmc && vub300->mmc->card && 734 mmc_card_present(vub300->mmc->card)) { 735 /* 736 * the MMC core must not have responded 737 * to the previous indication - lets 738 * hope that it eventually does so we 739 * will just ignore this for now 740 */ 741 } else { 742 check_vub300_port_status(vub300); 743 } 744 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 745 mutex_unlock(&vub300->cmd_mutex); 746 kref_put(&vub300->kref, vub300_delete); 747 } 748 749 static void vub300_inactivity_timer_expired(unsigned long data) 750 { /* softirq */ 751 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)data; 752 if (!vub300->interface) { 753 kref_put(&vub300->kref, vub300_delete); 754 } else if (vub300->cmd) { 755 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 756 } else { 757 vub300_queue_dead_work(vub300); 758 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 759 } 760 } 761 762 static int vub300_response_error(u8 error_code) 763 { 764 switch (error_code) { 765 case SD_ERROR_PIO_TIMEOUT: 766 case SD_ERROR_1BIT_TIMEOUT: 767 case SD_ERROR_4BIT_TIMEOUT: 768 return -ETIMEDOUT; 769 case SD_ERROR_STAT_DATA: 770 case SD_ERROR_OVERRUN: 771 case SD_ERROR_STAT_CMD: 772 case SD_ERROR_STAT_CMD_TIMEOUT: 773 case SD_ERROR_SDCRDY_STUCK: 774 case SD_ERROR_UNHANDLED: 775 case SD_ERROR_1BIT_CRC_WRONG: 776 case SD_ERROR_4BIT_CRC_WRONG: 777 case SD_ERROR_1BIT_CRC_ERROR: 778 case SD_ERROR_4BIT_CRC_ERROR: 779 case SD_ERROR_NO_CMD_ENDBIT: 780 case SD_ERROR_NO_1BIT_DATEND: 781 case SD_ERROR_NO_4BIT_DATEND: 782 case SD_ERROR_1BIT_DATA_TIMEOUT: 783 case SD_ERROR_4BIT_DATA_TIMEOUT: 784 case SD_ERROR_1BIT_UNEXPECTED_TIMEOUT: 785 case SD_ERROR_4BIT_UNEXPECTED_TIMEOUT: 786 return -EILSEQ; 787 case 33: 788 return -EILSEQ; 789 case SD_ERROR_ILLEGAL_COMMAND: 790 return -EINVAL; 791 case SD_ERROR_NO_DEVICE: 792 return -ENOMEDIUM; 793 default: 794 return -ENODEV; 795 } 796 } 797 798 static void command_res_completed(struct urb *urb) 799 { /* urb completion handler - hardirq */ 800 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context; 801 if (urb->status) { 802 /* we have to let the initiator handle the error */ 803 } else if (vub300->command_res_urb->actual_length == 0) { 804 /* 805 * we have seen this happen once or twice and 806 * we suspect a buggy USB host controller 807 */ 808 } else if (!vub300->data) { 809 /* this means that the command (typically CMD52) succeeded */ 810 } else if (vub300->resp.common.header_type != 0x02) { 811 /* 812 * this is an error response from the VUB300 chip 813 * and we let the initiator handle it 814 */ 815 } else if (vub300->urb) { 816 vub300->cmd->error = 817 vub300_response_error(vub300->resp.error.error_code); 818 usb_unlink_urb(vub300->urb); 819 } else { 820 vub300->cmd->error = 821 vub300_response_error(vub300->resp.error.error_code); 822 usb_sg_cancel(&vub300->sg_request); 823 } 824 complete(&vub300->command_complete); /* got_response_in */ 825 } 826 827 static void command_out_completed(struct urb *urb) 828 { /* urb completion handler - hardirq */ 829 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context; 830 if (urb->status) { 831 complete(&vub300->command_complete); 832 } else { 833 int ret; 834 unsigned int pipe = 835 usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep); 836 usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe, 837 &vub300->resp, sizeof(vub300->resp), 838 command_res_completed, vub300); 839 vub300->command_res_urb->actual_length = 0; 840 ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC); 841 if (ret == 0) { 842 /* 843 * the urb completion handler will call 844 * our completion handler 845 */ 846 } else { 847 /* 848 * and thus we only call it directly 849 * when it will not be called 850 */ 851 complete(&vub300->command_complete); 852 } 853 } 854 } 855 856 /* 857 * the STUFF bits are masked out for the comparisons 858 */ 859 static void snoop_block_size_and_bus_width(struct vub300_mmc_host *vub300, 860 u32 cmd_arg) 861 { 862 if ((0xFBFFFE00 & cmd_arg) == 0x80022200) 863 vub300->fbs[1] = (cmd_arg << 8) | (0x00FF & vub300->fbs[1]); 864 else if ((0xFBFFFE00 & cmd_arg) == 0x80022000) 865 vub300->fbs[1] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[1]); 866 else if ((0xFBFFFE00 & cmd_arg) == 0x80042200) 867 vub300->fbs[2] = (cmd_arg << 8) | (0x00FF & vub300->fbs[2]); 868 else if ((0xFBFFFE00 & cmd_arg) == 0x80042000) 869 vub300->fbs[2] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[2]); 870 else if ((0xFBFFFE00 & cmd_arg) == 0x80062200) 871 vub300->fbs[3] = (cmd_arg << 8) | (0x00FF & vub300->fbs[3]); 872 else if ((0xFBFFFE00 & cmd_arg) == 0x80062000) 873 vub300->fbs[3] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[3]); 874 else if ((0xFBFFFE00 & cmd_arg) == 0x80082200) 875 vub300->fbs[4] = (cmd_arg << 8) | (0x00FF & vub300->fbs[4]); 876 else if ((0xFBFFFE00 & cmd_arg) == 0x80082000) 877 vub300->fbs[4] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[4]); 878 else if ((0xFBFFFE00 & cmd_arg) == 0x800A2200) 879 vub300->fbs[5] = (cmd_arg << 8) | (0x00FF & vub300->fbs[5]); 880 else if ((0xFBFFFE00 & cmd_arg) == 0x800A2000) 881 vub300->fbs[5] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[5]); 882 else if ((0xFBFFFE00 & cmd_arg) == 0x800C2200) 883 vub300->fbs[6] = (cmd_arg << 8) | (0x00FF & vub300->fbs[6]); 884 else if ((0xFBFFFE00 & cmd_arg) == 0x800C2000) 885 vub300->fbs[6] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[6]); 886 else if ((0xFBFFFE00 & cmd_arg) == 0x800E2200) 887 vub300->fbs[7] = (cmd_arg << 8) | (0x00FF & vub300->fbs[7]); 888 else if ((0xFBFFFE00 & cmd_arg) == 0x800E2000) 889 vub300->fbs[7] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[7]); 890 else if ((0xFBFFFE03 & cmd_arg) == 0x80000E00) 891 vub300->bus_width = 1; 892 else if ((0xFBFFFE03 & cmd_arg) == 0x80000E02) 893 vub300->bus_width = 4; 894 } 895 896 static void send_command(struct vub300_mmc_host *vub300) 897 { 898 /* cmd_mutex is held by vub300_cmndwork_thread */ 899 struct mmc_command *cmd = vub300->cmd; 900 struct mmc_data *data = vub300->data; 901 int retval; 902 int i; 903 u8 response_type; 904 if (vub300->app_spec) { 905 switch (cmd->opcode) { 906 case 6: 907 response_type = SDRT_1; 908 vub300->resp_len = 6; 909 if (0x00000000 == (0x00000003 & cmd->arg)) 910 vub300->bus_width = 1; 911 else if (0x00000002 == (0x00000003 & cmd->arg)) 912 vub300->bus_width = 4; 913 else 914 dev_err(&vub300->udev->dev, 915 "unexpected ACMD6 bus_width=%d\n", 916 0x00000003 & cmd->arg); 917 break; 918 case 13: 919 response_type = SDRT_1; 920 vub300->resp_len = 6; 921 break; 922 case 22: 923 response_type = SDRT_1; 924 vub300->resp_len = 6; 925 break; 926 case 23: 927 response_type = SDRT_1; 928 vub300->resp_len = 6; 929 break; 930 case 41: 931 response_type = SDRT_3; 932 vub300->resp_len = 6; 933 break; 934 case 42: 935 response_type = SDRT_1; 936 vub300->resp_len = 6; 937 break; 938 case 51: 939 response_type = SDRT_1; 940 vub300->resp_len = 6; 941 break; 942 case 55: 943 response_type = SDRT_1; 944 vub300->resp_len = 6; 945 break; 946 default: 947 vub300->resp_len = 0; 948 cmd->error = -EINVAL; 949 complete(&vub300->command_complete); 950 return; 951 } 952 vub300->app_spec = 0; 953 } else { 954 switch (cmd->opcode) { 955 case 0: 956 response_type = SDRT_NONE; 957 vub300->resp_len = 0; 958 break; 959 case 1: 960 response_type = SDRT_3; 961 vub300->resp_len = 6; 962 break; 963 case 2: 964 response_type = SDRT_2; 965 vub300->resp_len = 17; 966 break; 967 case 3: 968 response_type = SDRT_6; 969 vub300->resp_len = 6; 970 break; 971 case 4: 972 response_type = SDRT_NONE; 973 vub300->resp_len = 0; 974 break; 975 case 5: 976 response_type = SDRT_4; 977 vub300->resp_len = 6; 978 break; 979 case 6: 980 response_type = SDRT_1; 981 vub300->resp_len = 6; 982 break; 983 case 7: 984 response_type = SDRT_1B; 985 vub300->resp_len = 6; 986 break; 987 case 8: 988 response_type = SDRT_7; 989 vub300->resp_len = 6; 990 break; 991 case 9: 992 response_type = SDRT_2; 993 vub300->resp_len = 17; 994 break; 995 case 10: 996 response_type = SDRT_2; 997 vub300->resp_len = 17; 998 break; 999 case 12: 1000 response_type = SDRT_1B; 1001 vub300->resp_len = 6; 1002 break; 1003 case 13: 1004 response_type = SDRT_1; 1005 vub300->resp_len = 6; 1006 break; 1007 case 15: 1008 response_type = SDRT_NONE; 1009 vub300->resp_len = 0; 1010 break; 1011 case 16: 1012 for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++) 1013 vub300->fbs[i] = 0xFFFF & cmd->arg; 1014 response_type = SDRT_1; 1015 vub300->resp_len = 6; 1016 break; 1017 case 17: 1018 case 18: 1019 case 24: 1020 case 25: 1021 case 27: 1022 response_type = SDRT_1; 1023 vub300->resp_len = 6; 1024 break; 1025 case 28: 1026 case 29: 1027 response_type = SDRT_1B; 1028 vub300->resp_len = 6; 1029 break; 1030 case 30: 1031 case 32: 1032 case 33: 1033 response_type = SDRT_1; 1034 vub300->resp_len = 6; 1035 break; 1036 case 38: 1037 response_type = SDRT_1B; 1038 vub300->resp_len = 6; 1039 break; 1040 case 42: 1041 response_type = SDRT_1; 1042 vub300->resp_len = 6; 1043 break; 1044 case 52: 1045 response_type = SDRT_5; 1046 vub300->resp_len = 6; 1047 snoop_block_size_and_bus_width(vub300, cmd->arg); 1048 break; 1049 case 53: 1050 response_type = SDRT_5; 1051 vub300->resp_len = 6; 1052 break; 1053 case 55: 1054 response_type = SDRT_1; 1055 vub300->resp_len = 6; 1056 vub300->app_spec = 1; 1057 break; 1058 case 56: 1059 response_type = SDRT_1; 1060 vub300->resp_len = 6; 1061 break; 1062 default: 1063 vub300->resp_len = 0; 1064 cmd->error = -EINVAL; 1065 complete(&vub300->command_complete); 1066 return; 1067 } 1068 } 1069 /* 1070 * it is a shame that we can not use "sizeof(struct sd_command_header)" 1071 * this is because the packet _must_ be padded to 64 bytes 1072 */ 1073 vub300->cmnd.head.header_size = 20; 1074 vub300->cmnd.head.header_type = 0x00; 1075 vub300->cmnd.head.port_number = 0; /* "0" means port 1 */ 1076 vub300->cmnd.head.command_type = 0x00; /* standard read command */ 1077 vub300->cmnd.head.response_type = response_type; 1078 vub300->cmnd.head.command_index = cmd->opcode; 1079 vub300->cmnd.head.arguments[0] = cmd->arg >> 24; 1080 vub300->cmnd.head.arguments[1] = cmd->arg >> 16; 1081 vub300->cmnd.head.arguments[2] = cmd->arg >> 8; 1082 vub300->cmnd.head.arguments[3] = cmd->arg >> 0; 1083 if (cmd->opcode == 52) { 1084 int fn = 0x7 & (cmd->arg >> 28); 1085 vub300->cmnd.head.block_count[0] = 0; 1086 vub300->cmnd.head.block_count[1] = 0; 1087 vub300->cmnd.head.block_size[0] = (vub300->fbs[fn] >> 8) & 0xFF; 1088 vub300->cmnd.head.block_size[1] = (vub300->fbs[fn] >> 0) & 0xFF; 1089 vub300->cmnd.head.command_type = 0x00; 1090 vub300->cmnd.head.transfer_size[0] = 0; 1091 vub300->cmnd.head.transfer_size[1] = 0; 1092 vub300->cmnd.head.transfer_size[2] = 0; 1093 vub300->cmnd.head.transfer_size[3] = 0; 1094 } else if (!data) { 1095 vub300->cmnd.head.block_count[0] = 0; 1096 vub300->cmnd.head.block_count[1] = 0; 1097 vub300->cmnd.head.block_size[0] = (vub300->fbs[0] >> 8) & 0xFF; 1098 vub300->cmnd.head.block_size[1] = (vub300->fbs[0] >> 0) & 0xFF; 1099 vub300->cmnd.head.command_type = 0x00; 1100 vub300->cmnd.head.transfer_size[0] = 0; 1101 vub300->cmnd.head.transfer_size[1] = 0; 1102 vub300->cmnd.head.transfer_size[2] = 0; 1103 vub300->cmnd.head.transfer_size[3] = 0; 1104 } else if (cmd->opcode == 53) { 1105 int fn = 0x7 & (cmd->arg >> 28); 1106 if (0x08 & vub300->cmnd.head.arguments[0]) { /* BLOCK MODE */ 1107 vub300->cmnd.head.block_count[0] = 1108 (data->blocks >> 8) & 0xFF; 1109 vub300->cmnd.head.block_count[1] = 1110 (data->blocks >> 0) & 0xFF; 1111 vub300->cmnd.head.block_size[0] = 1112 (data->blksz >> 8) & 0xFF; 1113 vub300->cmnd.head.block_size[1] = 1114 (data->blksz >> 0) & 0xFF; 1115 } else { /* BYTE MODE */ 1116 vub300->cmnd.head.block_count[0] = 0; 1117 vub300->cmnd.head.block_count[1] = 0; 1118 vub300->cmnd.head.block_size[0] = 1119 (vub300->datasize >> 8) & 0xFF; 1120 vub300->cmnd.head.block_size[1] = 1121 (vub300->datasize >> 0) & 0xFF; 1122 } 1123 vub300->cmnd.head.command_type = 1124 (MMC_DATA_READ & data->flags) ? 0x00 : 0x80; 1125 vub300->cmnd.head.transfer_size[0] = 1126 (vub300->datasize >> 24) & 0xFF; 1127 vub300->cmnd.head.transfer_size[1] = 1128 (vub300->datasize >> 16) & 0xFF; 1129 vub300->cmnd.head.transfer_size[2] = 1130 (vub300->datasize >> 8) & 0xFF; 1131 vub300->cmnd.head.transfer_size[3] = 1132 (vub300->datasize >> 0) & 0xFF; 1133 if (vub300->datasize < vub300->fbs[fn]) { 1134 vub300->cmnd.head.block_count[0] = 0; 1135 vub300->cmnd.head.block_count[1] = 0; 1136 } 1137 } else { 1138 vub300->cmnd.head.block_count[0] = (data->blocks >> 8) & 0xFF; 1139 vub300->cmnd.head.block_count[1] = (data->blocks >> 0) & 0xFF; 1140 vub300->cmnd.head.block_size[0] = (data->blksz >> 8) & 0xFF; 1141 vub300->cmnd.head.block_size[1] = (data->blksz >> 0) & 0xFF; 1142 vub300->cmnd.head.command_type = 1143 (MMC_DATA_READ & data->flags) ? 0x00 : 0x80; 1144 vub300->cmnd.head.transfer_size[0] = 1145 (vub300->datasize >> 24) & 0xFF; 1146 vub300->cmnd.head.transfer_size[1] = 1147 (vub300->datasize >> 16) & 0xFF; 1148 vub300->cmnd.head.transfer_size[2] = 1149 (vub300->datasize >> 8) & 0xFF; 1150 vub300->cmnd.head.transfer_size[3] = 1151 (vub300->datasize >> 0) & 0xFF; 1152 if (vub300->datasize < vub300->fbs[0]) { 1153 vub300->cmnd.head.block_count[0] = 0; 1154 vub300->cmnd.head.block_count[1] = 0; 1155 } 1156 } 1157 if (vub300->cmnd.head.block_size[0] || vub300->cmnd.head.block_size[1]) { 1158 u16 block_size = vub300->cmnd.head.block_size[1] | 1159 (vub300->cmnd.head.block_size[0] << 8); 1160 u16 block_boundary = FIRMWARE_BLOCK_BOUNDARY - 1161 (FIRMWARE_BLOCK_BOUNDARY % block_size); 1162 vub300->cmnd.head.block_boundary[0] = 1163 (block_boundary >> 8) & 0xFF; 1164 vub300->cmnd.head.block_boundary[1] = 1165 (block_boundary >> 0) & 0xFF; 1166 } else { 1167 vub300->cmnd.head.block_boundary[0] = 0; 1168 vub300->cmnd.head.block_boundary[1] = 0; 1169 } 1170 usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev, 1171 usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep), 1172 &vub300->cmnd, sizeof(vub300->cmnd), 1173 command_out_completed, vub300); 1174 retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL); 1175 if (retval < 0) { 1176 cmd->error = retval; 1177 complete(&vub300->command_complete); 1178 return; 1179 } else { 1180 return; 1181 } 1182 } 1183 1184 /* 1185 * timer callback runs in atomic mode 1186 * so it cannot call usb_kill_urb() 1187 */ 1188 static void vub300_sg_timed_out(unsigned long data) 1189 { 1190 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)data; 1191 vub300->usb_timed_out = 1; 1192 usb_sg_cancel(&vub300->sg_request); 1193 usb_unlink_urb(vub300->command_out_urb); 1194 usb_unlink_urb(vub300->command_res_urb); 1195 } 1196 1197 static u16 roundup_to_multiple_of_64(u16 number) 1198 { 1199 return 0xFFC0 & (0x3F + number); 1200 } 1201 1202 /* 1203 * this is a separate function to solve the 80 column width restriction 1204 */ 1205 static void __download_offload_pseudocode(struct vub300_mmc_host *vub300, 1206 const struct firmware *fw) 1207 { 1208 u8 register_count = 0; 1209 u16 ts = 0; 1210 u16 interrupt_size = 0; 1211 const u8 *data = fw->data; 1212 int size = fw->size; 1213 u8 c; 1214 dev_info(&vub300->udev->dev, "using %s for SDIO offload processing\n", 1215 vub300->vub_name); 1216 do { 1217 c = *data++; 1218 } while (size-- && c); /* skip comment */ 1219 dev_info(&vub300->udev->dev, "using offload firmware %s %s\n", fw->data, 1220 vub300->vub_name); 1221 if (size < 4) { 1222 dev_err(&vub300->udev->dev, 1223 "corrupt offload pseudocode in firmware %s\n", 1224 vub300->vub_name); 1225 strncpy(vub300->vub_name, "corrupt offload pseudocode", 1226 sizeof(vub300->vub_name)); 1227 return; 1228 } 1229 interrupt_size += *data++; 1230 size -= 1; 1231 interrupt_size <<= 8; 1232 interrupt_size += *data++; 1233 size -= 1; 1234 if (interrupt_size < size) { 1235 u16 xfer_length = roundup_to_multiple_of_64(interrupt_size); 1236 u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL); 1237 if (xfer_buffer) { 1238 int retval; 1239 memcpy(xfer_buffer, data, interrupt_size); 1240 memset(xfer_buffer + interrupt_size, 0, 1241 xfer_length - interrupt_size); 1242 size -= interrupt_size; 1243 data += interrupt_size; 1244 retval = 1245 usb_control_msg(vub300->udev, 1246 usb_sndctrlpipe(vub300->udev, 0), 1247 SET_INTERRUPT_PSEUDOCODE, 1248 USB_DIR_OUT | USB_TYPE_VENDOR | 1249 USB_RECIP_DEVICE, 0x0000, 0x0000, 1250 xfer_buffer, xfer_length, HZ); 1251 kfree(xfer_buffer); 1252 if (retval < 0) { 1253 strncpy(vub300->vub_name, 1254 "SDIO pseudocode download failed", 1255 sizeof(vub300->vub_name)); 1256 return; 1257 } 1258 } else { 1259 dev_err(&vub300->udev->dev, 1260 "not enough memory for xfer buffer to send" 1261 " INTERRUPT_PSEUDOCODE for %s %s\n", fw->data, 1262 vub300->vub_name); 1263 strncpy(vub300->vub_name, 1264 "SDIO interrupt pseudocode download failed", 1265 sizeof(vub300->vub_name)); 1266 return; 1267 } 1268 } else { 1269 dev_err(&vub300->udev->dev, 1270 "corrupt interrupt pseudocode in firmware %s %s\n", 1271 fw->data, vub300->vub_name); 1272 strncpy(vub300->vub_name, "corrupt interrupt pseudocode", 1273 sizeof(vub300->vub_name)); 1274 return; 1275 } 1276 ts += *data++; 1277 size -= 1; 1278 ts <<= 8; 1279 ts += *data++; 1280 size -= 1; 1281 if (ts < size) { 1282 u16 xfer_length = roundup_to_multiple_of_64(ts); 1283 u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL); 1284 if (xfer_buffer) { 1285 int retval; 1286 memcpy(xfer_buffer, data, ts); 1287 memset(xfer_buffer + ts, 0, 1288 xfer_length - ts); 1289 size -= ts; 1290 data += ts; 1291 retval = 1292 usb_control_msg(vub300->udev, 1293 usb_sndctrlpipe(vub300->udev, 0), 1294 SET_TRANSFER_PSEUDOCODE, 1295 USB_DIR_OUT | USB_TYPE_VENDOR | 1296 USB_RECIP_DEVICE, 0x0000, 0x0000, 1297 xfer_buffer, xfer_length, HZ); 1298 kfree(xfer_buffer); 1299 if (retval < 0) { 1300 strncpy(vub300->vub_name, 1301 "SDIO pseudocode download failed", 1302 sizeof(vub300->vub_name)); 1303 return; 1304 } 1305 } else { 1306 dev_err(&vub300->udev->dev, 1307 "not enough memory for xfer buffer to send" 1308 " TRANSFER_PSEUDOCODE for %s %s\n", fw->data, 1309 vub300->vub_name); 1310 strncpy(vub300->vub_name, 1311 "SDIO transfer pseudocode download failed", 1312 sizeof(vub300->vub_name)); 1313 return; 1314 } 1315 } else { 1316 dev_err(&vub300->udev->dev, 1317 "corrupt transfer pseudocode in firmware %s %s\n", 1318 fw->data, vub300->vub_name); 1319 strncpy(vub300->vub_name, "corrupt transfer pseudocode", 1320 sizeof(vub300->vub_name)); 1321 return; 1322 } 1323 register_count += *data++; 1324 size -= 1; 1325 if (register_count * 4 == size) { 1326 int I = vub300->dynamic_register_count = register_count; 1327 int i = 0; 1328 while (I--) { 1329 unsigned int func_num = 0; 1330 vub300->sdio_register[i].func_num = *data++; 1331 size -= 1; 1332 func_num += *data++; 1333 size -= 1; 1334 func_num <<= 8; 1335 func_num += *data++; 1336 size -= 1; 1337 func_num <<= 8; 1338 func_num += *data++; 1339 size -= 1; 1340 vub300->sdio_register[i].sdio_reg = func_num; 1341 vub300->sdio_register[i].activate = 1; 1342 vub300->sdio_register[i].prepared = 0; 1343 i += 1; 1344 } 1345 dev_info(&vub300->udev->dev, 1346 "initialized %d dynamic pseudocode registers\n", 1347 vub300->dynamic_register_count); 1348 return; 1349 } else { 1350 dev_err(&vub300->udev->dev, 1351 "corrupt dynamic registers in firmware %s\n", 1352 vub300->vub_name); 1353 strncpy(vub300->vub_name, "corrupt dynamic registers", 1354 sizeof(vub300->vub_name)); 1355 return; 1356 } 1357 } 1358 1359 /* 1360 * if the binary containing the EMPTY PseudoCode can not be found 1361 * vub300->vub_name is set anyway in order to prevent an automatic retry 1362 */ 1363 static void download_offload_pseudocode(struct vub300_mmc_host *vub300) 1364 { 1365 struct mmc_card *card = vub300->mmc->card; 1366 int sdio_funcs = card->sdio_funcs; 1367 const struct firmware *fw = NULL; 1368 int l = snprintf(vub300->vub_name, sizeof(vub300->vub_name), 1369 "vub_%04X%04X", card->cis.vendor, card->cis.device); 1370 int n = 0; 1371 int retval; 1372 for (n = 0; n < sdio_funcs; n++) { 1373 struct sdio_func *sf = card->sdio_func[n]; 1374 l += snprintf(vub300->vub_name + l, 1375 sizeof(vub300->vub_name) - l, "_%04X%04X", 1376 sf->vendor, sf->device); 1377 }; 1378 snprintf(vub300->vub_name + l, sizeof(vub300->vub_name) - l, ".bin"); 1379 dev_info(&vub300->udev->dev, "requesting offload firmware %s\n", 1380 vub300->vub_name); 1381 retval = request_firmware(&fw, vub300->vub_name, &card->dev); 1382 if (retval < 0) { 1383 strncpy(vub300->vub_name, "vub_default.bin", 1384 sizeof(vub300->vub_name)); 1385 retval = request_firmware(&fw, vub300->vub_name, &card->dev); 1386 if (retval < 0) { 1387 strncpy(vub300->vub_name, 1388 "no SDIO offload firmware found", 1389 sizeof(vub300->vub_name)); 1390 } else { 1391 __download_offload_pseudocode(vub300, fw); 1392 release_firmware(fw); 1393 } 1394 } else { 1395 __download_offload_pseudocode(vub300, fw); 1396 release_firmware(fw); 1397 } 1398 } 1399 1400 static void vub300_usb_bulk_msg_completion(struct urb *urb) 1401 { /* urb completion handler - hardirq */ 1402 complete((struct completion *)urb->context); 1403 } 1404 1405 static int vub300_usb_bulk_msg(struct vub300_mmc_host *vub300, 1406 unsigned int pipe, void *data, int len, 1407 int *actual_length, int timeout_msecs) 1408 { 1409 /* cmd_mutex is held by vub300_cmndwork_thread */ 1410 struct usb_device *usb_dev = vub300->udev; 1411 struct completion done; 1412 int retval; 1413 vub300->urb = usb_alloc_urb(0, GFP_KERNEL); 1414 if (!vub300->urb) 1415 return -ENOMEM; 1416 usb_fill_bulk_urb(vub300->urb, usb_dev, pipe, data, len, 1417 vub300_usb_bulk_msg_completion, NULL); 1418 init_completion(&done); 1419 vub300->urb->context = &done; 1420 vub300->urb->actual_length = 0; 1421 retval = usb_submit_urb(vub300->urb, GFP_KERNEL); 1422 if (unlikely(retval)) 1423 goto out; 1424 if (!wait_for_completion_timeout 1425 (&done, msecs_to_jiffies(timeout_msecs))) { 1426 retval = -ETIMEDOUT; 1427 usb_kill_urb(vub300->urb); 1428 } else { 1429 retval = vub300->urb->status; 1430 } 1431 out: 1432 *actual_length = vub300->urb->actual_length; 1433 usb_free_urb(vub300->urb); 1434 vub300->urb = NULL; 1435 return retval; 1436 } 1437 1438 static int __command_read_data(struct vub300_mmc_host *vub300, 1439 struct mmc_command *cmd, struct mmc_data *data) 1440 { 1441 /* cmd_mutex is held by vub300_cmndwork_thread */ 1442 int linear_length = vub300->datasize; 1443 int padded_length = vub300->large_usb_packets ? 1444 ((511 + linear_length) >> 9) << 9 : 1445 ((63 + linear_length) >> 6) << 6; 1446 if ((padded_length == linear_length) || !pad_input_to_usb_pkt) { 1447 int result; 1448 unsigned pipe; 1449 pipe = usb_rcvbulkpipe(vub300->udev, vub300->data_inp_ep); 1450 result = usb_sg_init(&vub300->sg_request, vub300->udev, 1451 pipe, 0, data->sg, 1452 data->sg_len, 0, GFP_KERNEL); 1453 if (result < 0) { 1454 usb_unlink_urb(vub300->command_out_urb); 1455 usb_unlink_urb(vub300->command_res_urb); 1456 cmd->error = result; 1457 data->bytes_xfered = 0; 1458 return 0; 1459 } else { 1460 vub300->sg_transfer_timer.expires = 1461 jiffies + msecs_to_jiffies(2000 + 1462 (linear_length / 16384)); 1463 add_timer(&vub300->sg_transfer_timer); 1464 usb_sg_wait(&vub300->sg_request); 1465 del_timer(&vub300->sg_transfer_timer); 1466 if (vub300->sg_request.status < 0) { 1467 cmd->error = vub300->sg_request.status; 1468 data->bytes_xfered = 0; 1469 return 0; 1470 } else { 1471 data->bytes_xfered = vub300->datasize; 1472 return linear_length; 1473 } 1474 } 1475 } else { 1476 u8 *buf = kmalloc(padded_length, GFP_KERNEL); 1477 if (buf) { 1478 int result; 1479 unsigned pipe = usb_rcvbulkpipe(vub300->udev, 1480 vub300->data_inp_ep); 1481 int actual_length = 0; 1482 result = vub300_usb_bulk_msg(vub300, pipe, buf, 1483 padded_length, &actual_length, 1484 2000 + (padded_length / 16384)); 1485 if (result < 0) { 1486 cmd->error = result; 1487 data->bytes_xfered = 0; 1488 kfree(buf); 1489 return 0; 1490 } else if (actual_length < linear_length) { 1491 cmd->error = -EREMOTEIO; 1492 data->bytes_xfered = 0; 1493 kfree(buf); 1494 return 0; 1495 } else { 1496 sg_copy_from_buffer(data->sg, data->sg_len, buf, 1497 linear_length); 1498 kfree(buf); 1499 data->bytes_xfered = vub300->datasize; 1500 return linear_length; 1501 } 1502 } else { 1503 cmd->error = -ENOMEM; 1504 data->bytes_xfered = 0; 1505 return 0; 1506 } 1507 } 1508 } 1509 1510 static int __command_write_data(struct vub300_mmc_host *vub300, 1511 struct mmc_command *cmd, struct mmc_data *data) 1512 { 1513 /* cmd_mutex is held by vub300_cmndwork_thread */ 1514 unsigned pipe = usb_sndbulkpipe(vub300->udev, vub300->data_out_ep); 1515 int linear_length = vub300->datasize; 1516 int modulo_64_length = linear_length & 0x003F; 1517 int modulo_512_length = linear_length & 0x01FF; 1518 if (linear_length < 64) { 1519 int result; 1520 int actual_length; 1521 sg_copy_to_buffer(data->sg, data->sg_len, 1522 vub300->padded_buffer, 1523 sizeof(vub300->padded_buffer)); 1524 memset(vub300->padded_buffer + linear_length, 0, 1525 sizeof(vub300->padded_buffer) - linear_length); 1526 result = vub300_usb_bulk_msg(vub300, pipe, vub300->padded_buffer, 1527 sizeof(vub300->padded_buffer), 1528 &actual_length, 2000 + 1529 (sizeof(vub300->padded_buffer) / 1530 16384)); 1531 if (result < 0) { 1532 cmd->error = result; 1533 data->bytes_xfered = 0; 1534 } else { 1535 data->bytes_xfered = vub300->datasize; 1536 } 1537 } else if ((!vub300->large_usb_packets && (0 < modulo_64_length)) || 1538 (vub300->large_usb_packets && (64 > modulo_512_length)) 1539 ) { /* don't you just love these work-rounds */ 1540 int padded_length = ((63 + linear_length) >> 6) << 6; 1541 u8 *buf = kmalloc(padded_length, GFP_KERNEL); 1542 if (buf) { 1543 int result; 1544 int actual_length; 1545 sg_copy_to_buffer(data->sg, data->sg_len, buf, 1546 padded_length); 1547 memset(buf + linear_length, 0, 1548 padded_length - linear_length); 1549 result = 1550 vub300_usb_bulk_msg(vub300, pipe, buf, 1551 padded_length, &actual_length, 1552 2000 + padded_length / 16384); 1553 kfree(buf); 1554 if (result < 0) { 1555 cmd->error = result; 1556 data->bytes_xfered = 0; 1557 } else { 1558 data->bytes_xfered = vub300->datasize; 1559 } 1560 } else { 1561 cmd->error = -ENOMEM; 1562 data->bytes_xfered = 0; 1563 } 1564 } else { /* no data padding required */ 1565 int result; 1566 unsigned char buf[64 * 4]; 1567 sg_copy_to_buffer(data->sg, data->sg_len, buf, sizeof(buf)); 1568 result = usb_sg_init(&vub300->sg_request, vub300->udev, 1569 pipe, 0, data->sg, 1570 data->sg_len, 0, GFP_KERNEL); 1571 if (result < 0) { 1572 usb_unlink_urb(vub300->command_out_urb); 1573 usb_unlink_urb(vub300->command_res_urb); 1574 cmd->error = result; 1575 data->bytes_xfered = 0; 1576 } else { 1577 vub300->sg_transfer_timer.expires = 1578 jiffies + msecs_to_jiffies(2000 + 1579 linear_length / 16384); 1580 add_timer(&vub300->sg_transfer_timer); 1581 usb_sg_wait(&vub300->sg_request); 1582 if (cmd->error) { 1583 data->bytes_xfered = 0; 1584 } else { 1585 del_timer(&vub300->sg_transfer_timer); 1586 if (vub300->sg_request.status < 0) { 1587 cmd->error = vub300->sg_request.status; 1588 data->bytes_xfered = 0; 1589 } else { 1590 data->bytes_xfered = vub300->datasize; 1591 } 1592 } 1593 } 1594 } 1595 return linear_length; 1596 } 1597 1598 static void __vub300_command_response(struct vub300_mmc_host *vub300, 1599 struct mmc_command *cmd, 1600 struct mmc_data *data, int data_length) 1601 { 1602 /* cmd_mutex is held by vub300_cmndwork_thread */ 1603 long respretval; 1604 int msec_timeout = 1000 + data_length / 4; 1605 respretval = 1606 wait_for_completion_timeout(&vub300->command_complete, 1607 msecs_to_jiffies(msec_timeout)); 1608 if (respretval == 0) { /* TIMED OUT */ 1609 /* we don't know which of "out" and "res" if any failed */ 1610 int result; 1611 vub300->usb_timed_out = 1; 1612 usb_kill_urb(vub300->command_out_urb); 1613 usb_kill_urb(vub300->command_res_urb); 1614 cmd->error = -ETIMEDOUT; 1615 result = usb_lock_device_for_reset(vub300->udev, 1616 vub300->interface); 1617 if (result == 0) { 1618 result = usb_reset_device(vub300->udev); 1619 usb_unlock_device(vub300->udev); 1620 } 1621 } else if (respretval < 0) { 1622 /* we don't know which of "out" and "res" if any failed */ 1623 usb_kill_urb(vub300->command_out_urb); 1624 usb_kill_urb(vub300->command_res_urb); 1625 cmd->error = respretval; 1626 } else if (cmd->error) { 1627 /* 1628 * the error occurred sending the command 1629 * or receiving the response 1630 */ 1631 } else if (vub300->command_out_urb->status) { 1632 vub300->usb_transport_fail = vub300->command_out_urb->status; 1633 cmd->error = -EPROTO == vub300->command_out_urb->status ? 1634 -ESHUTDOWN : vub300->command_out_urb->status; 1635 } else if (vub300->command_res_urb->status) { 1636 vub300->usb_transport_fail = vub300->command_res_urb->status; 1637 cmd->error = -EPROTO == vub300->command_res_urb->status ? 1638 -ESHUTDOWN : vub300->command_res_urb->status; 1639 } else if (vub300->resp.common.header_type == 0x00) { 1640 /* 1641 * the command completed successfully 1642 * and there was no piggybacked data 1643 */ 1644 } else if (vub300->resp.common.header_type == RESPONSE_ERROR) { 1645 cmd->error = 1646 vub300_response_error(vub300->resp.error.error_code); 1647 if (vub300->data) 1648 usb_sg_cancel(&vub300->sg_request); 1649 } else if (vub300->resp.common.header_type == RESPONSE_PIGGYBACKED) { 1650 int offloaded_data_length = 1651 vub300->resp.common.header_size - 1652 sizeof(struct sd_register_header); 1653 int register_count = offloaded_data_length >> 3; 1654 int ri = 0; 1655 while (register_count--) { 1656 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]); 1657 ri += 1; 1658 } 1659 vub300->resp.common.header_size = 1660 sizeof(struct sd_register_header); 1661 vub300->resp.common.header_type = 0x00; 1662 cmd->error = 0; 1663 } else if (vub300->resp.common.header_type == RESPONSE_PIG_DISABLED) { 1664 int offloaded_data_length = 1665 vub300->resp.common.header_size - 1666 sizeof(struct sd_register_header); 1667 int register_count = offloaded_data_length >> 3; 1668 int ri = 0; 1669 while (register_count--) { 1670 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]); 1671 ri += 1; 1672 } 1673 mutex_lock(&vub300->irq_mutex); 1674 if (vub300->irqs_queued) { 1675 vub300->irqs_queued += 1; 1676 } else if (vub300->irq_enabled) { 1677 vub300->irqs_queued += 1; 1678 vub300_queue_poll_work(vub300, 0); 1679 } else { 1680 vub300->irqs_queued += 1; 1681 } 1682 vub300->irq_disabled = 1; 1683 mutex_unlock(&vub300->irq_mutex); 1684 vub300->resp.common.header_size = 1685 sizeof(struct sd_register_header); 1686 vub300->resp.common.header_type = 0x00; 1687 cmd->error = 0; 1688 } else if (vub300->resp.common.header_type == RESPONSE_PIG_ENABLED) { 1689 int offloaded_data_length = 1690 vub300->resp.common.header_size - 1691 sizeof(struct sd_register_header); 1692 int register_count = offloaded_data_length >> 3; 1693 int ri = 0; 1694 while (register_count--) { 1695 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]); 1696 ri += 1; 1697 } 1698 mutex_lock(&vub300->irq_mutex); 1699 if (vub300->irqs_queued) { 1700 vub300->irqs_queued += 1; 1701 } else if (vub300->irq_enabled) { 1702 vub300->irqs_queued += 1; 1703 vub300_queue_poll_work(vub300, 0); 1704 } else { 1705 vub300->irqs_queued += 1; 1706 } 1707 vub300->irq_disabled = 0; 1708 mutex_unlock(&vub300->irq_mutex); 1709 vub300->resp.common.header_size = 1710 sizeof(struct sd_register_header); 1711 vub300->resp.common.header_type = 0x00; 1712 cmd->error = 0; 1713 } else { 1714 cmd->error = -EINVAL; 1715 } 1716 } 1717 1718 static void construct_request_response(struct vub300_mmc_host *vub300, 1719 struct mmc_command *cmd) 1720 { 1721 int resp_len = vub300->resp_len; 1722 int less_cmd = (17 == resp_len) ? resp_len : resp_len - 1; 1723 int bytes = 3 & less_cmd; 1724 int words = less_cmd >> 2; 1725 u8 *r = vub300->resp.response.command_response; 1726 if (bytes == 3) { 1727 cmd->resp[words] = (r[1 + (words << 2)] << 24) 1728 | (r[2 + (words << 2)] << 16) 1729 | (r[3 + (words << 2)] << 8); 1730 } else if (bytes == 2) { 1731 cmd->resp[words] = (r[1 + (words << 2)] << 24) 1732 | (r[2 + (words << 2)] << 16); 1733 } else if (bytes == 1) { 1734 cmd->resp[words] = (r[1 + (words << 2)] << 24); 1735 } 1736 while (words-- > 0) { 1737 cmd->resp[words] = (r[1 + (words << 2)] << 24) 1738 | (r[2 + (words << 2)] << 16) 1739 | (r[3 + (words << 2)] << 8) 1740 | (r[4 + (words << 2)] << 0); 1741 } 1742 if ((cmd->opcode == 53) && (0x000000FF & cmd->resp[0])) 1743 cmd->resp[0] &= 0xFFFFFF00; 1744 } 1745 1746 /* this thread runs only when there is an upper level command req outstanding */ 1747 static void vub300_cmndwork_thread(struct work_struct *work) 1748 { 1749 struct vub300_mmc_host *vub300 = 1750 container_of(work, struct vub300_mmc_host, cmndwork); 1751 if (!vub300->interface) { 1752 kref_put(&vub300->kref, vub300_delete); 1753 return; 1754 } else { 1755 struct mmc_request *req = vub300->req; 1756 struct mmc_command *cmd = vub300->cmd; 1757 struct mmc_data *data = vub300->data; 1758 int data_length; 1759 mutex_lock(&vub300->cmd_mutex); 1760 init_completion(&vub300->command_complete); 1761 if (likely(vub300->vub_name[0]) || !vub300->mmc->card || 1762 !mmc_card_present(vub300->mmc->card)) { 1763 /* 1764 * the name of the EMPTY Pseudo firmware file 1765 * is used as a flag to indicate that the file 1766 * has been already downloaded to the VUB300 chip 1767 */ 1768 } else if (0 == vub300->mmc->card->sdio_funcs) { 1769 strncpy(vub300->vub_name, "SD memory device", 1770 sizeof(vub300->vub_name)); 1771 } else { 1772 download_offload_pseudocode(vub300); 1773 } 1774 send_command(vub300); 1775 if (!data) 1776 data_length = 0; 1777 else if (MMC_DATA_READ & data->flags) 1778 data_length = __command_read_data(vub300, cmd, data); 1779 else 1780 data_length = __command_write_data(vub300, cmd, data); 1781 __vub300_command_response(vub300, cmd, data, data_length); 1782 vub300->req = NULL; 1783 vub300->cmd = NULL; 1784 vub300->data = NULL; 1785 if (cmd->error) { 1786 if (cmd->error == -ENOMEDIUM) 1787 check_vub300_port_status(vub300); 1788 mutex_unlock(&vub300->cmd_mutex); 1789 mmc_request_done(vub300->mmc, req); 1790 kref_put(&vub300->kref, vub300_delete); 1791 return; 1792 } else { 1793 construct_request_response(vub300, cmd); 1794 vub300->resp_len = 0; 1795 mutex_unlock(&vub300->cmd_mutex); 1796 kref_put(&vub300->kref, vub300_delete); 1797 mmc_request_done(vub300->mmc, req); 1798 return; 1799 } 1800 } 1801 } 1802 1803 static int examine_cyclic_buffer(struct vub300_mmc_host *vub300, 1804 struct mmc_command *cmd, u8 Function) 1805 { 1806 /* cmd_mutex is held by vub300_mmc_request */ 1807 u8 cmd0 = 0xFF & (cmd->arg >> 24); 1808 u8 cmd1 = 0xFF & (cmd->arg >> 16); 1809 u8 cmd2 = 0xFF & (cmd->arg >> 8); 1810 u8 cmd3 = 0xFF & (cmd->arg >> 0); 1811 int first = MAXREGMASK & vub300->fn[Function].offload_point; 1812 struct offload_registers_access *rf = &vub300->fn[Function].reg[first]; 1813 if (cmd0 == rf->command_byte[0] && 1814 cmd1 == rf->command_byte[1] && 1815 cmd2 == rf->command_byte[2] && 1816 cmd3 == rf->command_byte[3]) { 1817 u8 checksum = 0x00; 1818 cmd->resp[1] = checksum << 24; 1819 cmd->resp[0] = (rf->Respond_Byte[0] << 24) 1820 | (rf->Respond_Byte[1] << 16) 1821 | (rf->Respond_Byte[2] << 8) 1822 | (rf->Respond_Byte[3] << 0); 1823 vub300->fn[Function].offload_point += 1; 1824 vub300->fn[Function].offload_count -= 1; 1825 vub300->total_offload_count -= 1; 1826 return 1; 1827 } else { 1828 int delta = 1; /* because it does not match the first one */ 1829 u8 register_count = vub300->fn[Function].offload_count - 1; 1830 u32 register_point = vub300->fn[Function].offload_point + 1; 1831 while (0 < register_count) { 1832 int point = MAXREGMASK & register_point; 1833 struct offload_registers_access *r = 1834 &vub300->fn[Function].reg[point]; 1835 if (cmd0 == r->command_byte[0] && 1836 cmd1 == r->command_byte[1] && 1837 cmd2 == r->command_byte[2] && 1838 cmd3 == r->command_byte[3]) { 1839 u8 checksum = 0x00; 1840 cmd->resp[1] = checksum << 24; 1841 cmd->resp[0] = (r->Respond_Byte[0] << 24) 1842 | (r->Respond_Byte[1] << 16) 1843 | (r->Respond_Byte[2] << 8) 1844 | (r->Respond_Byte[3] << 0); 1845 vub300->fn[Function].offload_point += delta; 1846 vub300->fn[Function].offload_count -= delta; 1847 vub300->total_offload_count -= delta; 1848 return 1; 1849 } else { 1850 register_point += 1; 1851 register_count -= 1; 1852 delta += 1; 1853 continue; 1854 } 1855 } 1856 return 0; 1857 } 1858 } 1859 1860 static int satisfy_request_from_offloaded_data(struct vub300_mmc_host *vub300, 1861 struct mmc_command *cmd) 1862 { 1863 /* cmd_mutex is held by vub300_mmc_request */ 1864 u8 regs = vub300->dynamic_register_count; 1865 u8 i = 0; 1866 u8 func = FUN(cmd); 1867 u32 reg = REG(cmd); 1868 while (0 < regs--) { 1869 if ((vub300->sdio_register[i].func_num == func) && 1870 (vub300->sdio_register[i].sdio_reg == reg)) { 1871 if (!vub300->sdio_register[i].prepared) { 1872 return 0; 1873 } else if ((0x80000000 & cmd->arg) == 0x80000000) { 1874 /* 1875 * a write to a dynamic register 1876 * nullifies our offloaded value 1877 */ 1878 vub300->sdio_register[i].prepared = 0; 1879 return 0; 1880 } else { 1881 u8 checksum = 0x00; 1882 u8 rsp0 = 0x00; 1883 u8 rsp1 = 0x00; 1884 u8 rsp2 = vub300->sdio_register[i].response; 1885 u8 rsp3 = vub300->sdio_register[i].regvalue; 1886 vub300->sdio_register[i].prepared = 0; 1887 cmd->resp[1] = checksum << 24; 1888 cmd->resp[0] = (rsp0 << 24) 1889 | (rsp1 << 16) 1890 | (rsp2 << 8) 1891 | (rsp3 << 0); 1892 return 1; 1893 } 1894 } else { 1895 i += 1; 1896 continue; 1897 } 1898 }; 1899 if (vub300->total_offload_count == 0) 1900 return 0; 1901 else if (vub300->fn[func].offload_count == 0) 1902 return 0; 1903 else 1904 return examine_cyclic_buffer(vub300, cmd, func); 1905 } 1906 1907 static void vub300_mmc_request(struct mmc_host *mmc, struct mmc_request *req) 1908 { /* NOT irq */ 1909 struct mmc_command *cmd = req->cmd; 1910 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 1911 if (!vub300->interface) { 1912 cmd->error = -ESHUTDOWN; 1913 mmc_request_done(mmc, req); 1914 return; 1915 } else { 1916 struct mmc_data *data = req->data; 1917 if (!vub300->card_powered) { 1918 cmd->error = -ENOMEDIUM; 1919 mmc_request_done(mmc, req); 1920 return; 1921 } 1922 if (!vub300->card_present) { 1923 cmd->error = -ENOMEDIUM; 1924 mmc_request_done(mmc, req); 1925 return; 1926 } 1927 if (vub300->usb_transport_fail) { 1928 cmd->error = vub300->usb_transport_fail; 1929 mmc_request_done(mmc, req); 1930 return; 1931 } 1932 if (!vub300->interface) { 1933 cmd->error = -ENODEV; 1934 mmc_request_done(mmc, req); 1935 return; 1936 } 1937 kref_get(&vub300->kref); 1938 mutex_lock(&vub300->cmd_mutex); 1939 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 1940 /* 1941 * for performance we have to return immediately 1942 * if the requested data has been offloaded 1943 */ 1944 if (cmd->opcode == 52 && 1945 satisfy_request_from_offloaded_data(vub300, cmd)) { 1946 cmd->error = 0; 1947 mutex_unlock(&vub300->cmd_mutex); 1948 kref_put(&vub300->kref, vub300_delete); 1949 mmc_request_done(mmc, req); 1950 return; 1951 } else { 1952 vub300->cmd = cmd; 1953 vub300->req = req; 1954 vub300->data = data; 1955 if (data) 1956 vub300->datasize = data->blksz * data->blocks; 1957 else 1958 vub300->datasize = 0; 1959 vub300_queue_cmnd_work(vub300); 1960 mutex_unlock(&vub300->cmd_mutex); 1961 kref_put(&vub300->kref, vub300_delete); 1962 /* 1963 * the kernel lock diagnostics complain 1964 * if the cmd_mutex * is "passed on" 1965 * to the cmndwork thread, 1966 * so we must release it now 1967 * and re-acquire it in the cmndwork thread 1968 */ 1969 } 1970 } 1971 } 1972 1973 static void __set_clock_speed(struct vub300_mmc_host *vub300, u8 buf[8], 1974 struct mmc_ios *ios) 1975 { 1976 int buf_array_size = 8; /* ARRAY_SIZE(buf) does not work !!! */ 1977 int retval; 1978 u32 kHzClock; 1979 if (ios->clock >= 48000000) 1980 kHzClock = 48000; 1981 else if (ios->clock >= 24000000) 1982 kHzClock = 24000; 1983 else if (ios->clock >= 20000000) 1984 kHzClock = 20000; 1985 else if (ios->clock >= 15000000) 1986 kHzClock = 15000; 1987 else if (ios->clock >= 200000) 1988 kHzClock = 200; 1989 else 1990 kHzClock = 0; 1991 { 1992 int i; 1993 u64 c = kHzClock; 1994 for (i = 0; i < buf_array_size; i++) { 1995 buf[i] = c; 1996 c >>= 8; 1997 } 1998 } 1999 retval = 2000 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0), 2001 SET_CLOCK_SPEED, 2002 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2003 0x00, 0x00, buf, buf_array_size, HZ); 2004 if (retval != 8) { 2005 dev_err(&vub300->udev->dev, "SET_CLOCK_SPEED" 2006 " %dkHz failed with retval=%d\n", kHzClock, retval); 2007 } else { 2008 dev_dbg(&vub300->udev->dev, "SET_CLOCK_SPEED" 2009 " %dkHz\n", kHzClock); 2010 } 2011 } 2012 2013 static void vub300_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 2014 { /* NOT irq */ 2015 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 2016 if (!vub300->interface) 2017 return; 2018 kref_get(&vub300->kref); 2019 mutex_lock(&vub300->cmd_mutex); 2020 if ((ios->power_mode == MMC_POWER_OFF) && vub300->card_powered) { 2021 vub300->card_powered = 0; 2022 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0), 2023 SET_SD_POWER, 2024 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2025 0x0000, 0x0000, NULL, 0, HZ); 2026 /* must wait for the VUB300 u-proc to boot up */ 2027 msleep(600); 2028 } else if ((ios->power_mode == MMC_POWER_UP) && !vub300->card_powered) { 2029 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0), 2030 SET_SD_POWER, 2031 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2032 0x0001, 0x0000, NULL, 0, HZ); 2033 msleep(600); 2034 vub300->card_powered = 1; 2035 } else if (ios->power_mode == MMC_POWER_ON) { 2036 u8 *buf = kmalloc(8, GFP_KERNEL); 2037 if (buf) { 2038 __set_clock_speed(vub300, buf, ios); 2039 kfree(buf); 2040 } 2041 } else { 2042 /* this should mean no change of state */ 2043 } 2044 mutex_unlock(&vub300->cmd_mutex); 2045 kref_put(&vub300->kref, vub300_delete); 2046 } 2047 2048 static int vub300_mmc_get_ro(struct mmc_host *mmc) 2049 { 2050 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 2051 return vub300->read_only; 2052 } 2053 2054 static void vub300_enable_sdio_irq(struct mmc_host *mmc, int enable) 2055 { /* NOT irq */ 2056 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 2057 if (!vub300->interface) 2058 return; 2059 kref_get(&vub300->kref); 2060 if (enable) { 2061 mutex_lock(&vub300->irq_mutex); 2062 if (vub300->irqs_queued) { 2063 vub300->irqs_queued -= 1; 2064 mmc_signal_sdio_irq(vub300->mmc); 2065 } else if (vub300->irq_disabled) { 2066 vub300->irq_disabled = 0; 2067 vub300->irq_enabled = 1; 2068 vub300_queue_poll_work(vub300, 0); 2069 } else if (vub300->irq_enabled) { 2070 /* this should not happen, so we will just ignore it */ 2071 } else { 2072 vub300->irq_enabled = 1; 2073 vub300_queue_poll_work(vub300, 0); 2074 } 2075 mutex_unlock(&vub300->irq_mutex); 2076 } else { 2077 vub300->irq_enabled = 0; 2078 } 2079 kref_put(&vub300->kref, vub300_delete); 2080 } 2081 2082 static void vub300_init_card(struct mmc_host *mmc, struct mmc_card *card) 2083 { /* NOT irq */ 2084 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 2085 dev_info(&vub300->udev->dev, "NO host QUIRKS for this card\n"); 2086 } 2087 2088 static struct mmc_host_ops vub300_mmc_ops = { 2089 .request = vub300_mmc_request, 2090 .set_ios = vub300_mmc_set_ios, 2091 .get_ro = vub300_mmc_get_ro, 2092 .enable_sdio_irq = vub300_enable_sdio_irq, 2093 .init_card = vub300_init_card, 2094 }; 2095 2096 static int vub300_probe(struct usb_interface *interface, 2097 const struct usb_device_id *id) 2098 { /* NOT irq */ 2099 struct vub300_mmc_host *vub300; 2100 struct usb_host_interface *iface_desc; 2101 struct usb_device *udev = usb_get_dev(interface_to_usbdev(interface)); 2102 int i; 2103 int retval = -ENOMEM; 2104 struct urb *command_out_urb; 2105 struct urb *command_res_urb; 2106 struct mmc_host *mmc; 2107 char manufacturer[48]; 2108 char product[32]; 2109 char serial_number[32]; 2110 usb_string(udev, udev->descriptor.iManufacturer, manufacturer, 2111 sizeof(manufacturer)); 2112 usb_string(udev, udev->descriptor.iProduct, product, sizeof(product)); 2113 usb_string(udev, udev->descriptor.iSerialNumber, serial_number, 2114 sizeof(serial_number)); 2115 dev_info(&udev->dev, "probing VID:PID(%04X:%04X) %s %s %s\n", 2116 udev->descriptor.idVendor, udev->descriptor.idProduct, 2117 manufacturer, product, serial_number); 2118 command_out_urb = usb_alloc_urb(0, GFP_KERNEL); 2119 if (!command_out_urb) { 2120 retval = -ENOMEM; 2121 dev_err(&udev->dev, "not enough memory for command_out_urb\n"); 2122 goto error0; 2123 } 2124 command_res_urb = usb_alloc_urb(0, GFP_KERNEL); 2125 if (!command_res_urb) { 2126 retval = -ENOMEM; 2127 dev_err(&udev->dev, "not enough memory for command_res_urb\n"); 2128 goto error1; 2129 } 2130 /* this also allocates memory for our VUB300 mmc host device */ 2131 mmc = mmc_alloc_host(sizeof(struct vub300_mmc_host), &udev->dev); 2132 if (!mmc) { 2133 retval = -ENOMEM; 2134 dev_err(&udev->dev, "not enough memory for the mmc_host\n"); 2135 goto error4; 2136 } 2137 /* MMC core transfer sizes tunable parameters */ 2138 mmc->caps = 0; 2139 if (!force_1_bit_data_xfers) 2140 mmc->caps |= MMC_CAP_4_BIT_DATA; 2141 if (!force_polling_for_irqs) 2142 mmc->caps |= MMC_CAP_SDIO_IRQ; 2143 mmc->caps &= ~MMC_CAP_NEEDS_POLL; 2144 /* 2145 * MMC_CAP_NEEDS_POLL causes core.c:mmc_rescan() to poll 2146 * for devices which results in spurious CMD7's being 2147 * issued which stops some SDIO cards from working 2148 */ 2149 if (limit_speed_to_24_MHz) { 2150 mmc->caps |= MMC_CAP_MMC_HIGHSPEED; 2151 mmc->caps |= MMC_CAP_SD_HIGHSPEED; 2152 mmc->f_max = 24000000; 2153 dev_info(&udev->dev, "limiting SDIO speed to 24_MHz\n"); 2154 } else { 2155 mmc->caps |= MMC_CAP_MMC_HIGHSPEED; 2156 mmc->caps |= MMC_CAP_SD_HIGHSPEED; 2157 mmc->f_max = 48000000; 2158 } 2159 mmc->f_min = 200000; 2160 mmc->max_blk_count = 511; 2161 mmc->max_blk_size = 512; 2162 mmc->max_segs = 128; 2163 if (force_max_req_size) 2164 mmc->max_req_size = force_max_req_size * 1024; 2165 else 2166 mmc->max_req_size = 64 * 1024; 2167 mmc->max_seg_size = mmc->max_req_size; 2168 mmc->ocr_avail = 0; 2169 mmc->ocr_avail |= MMC_VDD_165_195; 2170 mmc->ocr_avail |= MMC_VDD_20_21; 2171 mmc->ocr_avail |= MMC_VDD_21_22; 2172 mmc->ocr_avail |= MMC_VDD_22_23; 2173 mmc->ocr_avail |= MMC_VDD_23_24; 2174 mmc->ocr_avail |= MMC_VDD_24_25; 2175 mmc->ocr_avail |= MMC_VDD_25_26; 2176 mmc->ocr_avail |= MMC_VDD_26_27; 2177 mmc->ocr_avail |= MMC_VDD_27_28; 2178 mmc->ocr_avail |= MMC_VDD_28_29; 2179 mmc->ocr_avail |= MMC_VDD_29_30; 2180 mmc->ocr_avail |= MMC_VDD_30_31; 2181 mmc->ocr_avail |= MMC_VDD_31_32; 2182 mmc->ocr_avail |= MMC_VDD_32_33; 2183 mmc->ocr_avail |= MMC_VDD_33_34; 2184 mmc->ocr_avail |= MMC_VDD_34_35; 2185 mmc->ocr_avail |= MMC_VDD_35_36; 2186 mmc->ops = &vub300_mmc_ops; 2187 vub300 = mmc_priv(mmc); 2188 vub300->mmc = mmc; 2189 vub300->card_powered = 0; 2190 vub300->bus_width = 0; 2191 vub300->cmnd.head.block_size[0] = 0x00; 2192 vub300->cmnd.head.block_size[1] = 0x00; 2193 vub300->app_spec = 0; 2194 mutex_init(&vub300->cmd_mutex); 2195 mutex_init(&vub300->irq_mutex); 2196 vub300->command_out_urb = command_out_urb; 2197 vub300->command_res_urb = command_res_urb; 2198 vub300->usb_timed_out = 0; 2199 vub300->dynamic_register_count = 0; 2200 2201 for (i = 0; i < ARRAY_SIZE(vub300->fn); i++) { 2202 vub300->fn[i].offload_point = 0; 2203 vub300->fn[i].offload_count = 0; 2204 } 2205 2206 vub300->total_offload_count = 0; 2207 vub300->irq_enabled = 0; 2208 vub300->irq_disabled = 0; 2209 vub300->irqs_queued = 0; 2210 2211 for (i = 0; i < ARRAY_SIZE(vub300->sdio_register); i++) 2212 vub300->sdio_register[i++].activate = 0; 2213 2214 vub300->udev = udev; 2215 vub300->interface = interface; 2216 vub300->cmnd_res_ep = 0; 2217 vub300->cmnd_out_ep = 0; 2218 vub300->data_inp_ep = 0; 2219 vub300->data_out_ep = 0; 2220 2221 for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++) 2222 vub300->fbs[i] = 512; 2223 2224 /* 2225 * set up the endpoint information 2226 * 2227 * use the first pair of bulk-in and bulk-out 2228 * endpoints for Command/Response+Interrupt 2229 * 2230 * use the second pair of bulk-in and bulk-out 2231 * endpoints for Data In/Out 2232 */ 2233 vub300->large_usb_packets = 0; 2234 iface_desc = interface->cur_altsetting; 2235 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 2236 struct usb_endpoint_descriptor *endpoint = 2237 &iface_desc->endpoint[i].desc; 2238 dev_info(&vub300->udev->dev, 2239 "vub300 testing %s EndPoint(%d) %02X\n", 2240 usb_endpoint_is_bulk_in(endpoint) ? "BULK IN" : 2241 usb_endpoint_is_bulk_out(endpoint) ? "BULK OUT" : 2242 "UNKNOWN", i, endpoint->bEndpointAddress); 2243 if (endpoint->wMaxPacketSize > 64) 2244 vub300->large_usb_packets = 1; 2245 if (usb_endpoint_is_bulk_in(endpoint)) { 2246 if (!vub300->cmnd_res_ep) { 2247 vub300->cmnd_res_ep = 2248 endpoint->bEndpointAddress; 2249 } else if (!vub300->data_inp_ep) { 2250 vub300->data_inp_ep = 2251 endpoint->bEndpointAddress; 2252 } else { 2253 dev_warn(&vub300->udev->dev, 2254 "ignoring" 2255 " unexpected bulk_in endpoint"); 2256 } 2257 } else if (usb_endpoint_is_bulk_out(endpoint)) { 2258 if (!vub300->cmnd_out_ep) { 2259 vub300->cmnd_out_ep = 2260 endpoint->bEndpointAddress; 2261 } else if (!vub300->data_out_ep) { 2262 vub300->data_out_ep = 2263 endpoint->bEndpointAddress; 2264 } else { 2265 dev_warn(&vub300->udev->dev, 2266 "ignoring" 2267 " unexpected bulk_out endpoint"); 2268 } 2269 } else { 2270 dev_warn(&vub300->udev->dev, 2271 "vub300 ignoring EndPoint(%d) %02X", i, 2272 endpoint->bEndpointAddress); 2273 } 2274 } 2275 if (vub300->cmnd_res_ep && vub300->cmnd_out_ep && 2276 vub300->data_inp_ep && vub300->data_out_ep) { 2277 dev_info(&vub300->udev->dev, 2278 "vub300 %s packets" 2279 " using EndPoints %02X %02X %02X %02X\n", 2280 vub300->large_usb_packets ? "LARGE" : "SMALL", 2281 vub300->cmnd_out_ep, vub300->cmnd_res_ep, 2282 vub300->data_out_ep, vub300->data_inp_ep); 2283 /* we have the expected EndPoints */ 2284 } else { 2285 dev_err(&vub300->udev->dev, 2286 "Could not find two sets of bulk-in/out endpoint pairs\n"); 2287 retval = -EINVAL; 2288 goto error5; 2289 } 2290 retval = 2291 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0), 2292 GET_HC_INF0, 2293 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2294 0x0000, 0x0000, &vub300->hc_info, 2295 sizeof(vub300->hc_info), HZ); 2296 if (retval < 0) 2297 goto error5; 2298 retval = 2299 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0), 2300 SET_ROM_WAIT_STATES, 2301 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2302 firmware_rom_wait_states, 0x0000, NULL, 0, HZ); 2303 if (retval < 0) 2304 goto error5; 2305 dev_info(&vub300->udev->dev, 2306 "operating_mode = %s %s %d MHz %s %d byte USB packets\n", 2307 (mmc->caps & MMC_CAP_SDIO_IRQ) ? "IRQs" : "POLL", 2308 (mmc->caps & MMC_CAP_4_BIT_DATA) ? "4-bit" : "1-bit", 2309 mmc->f_max / 1000000, 2310 pad_input_to_usb_pkt ? "padding input data to" : "with", 2311 vub300->large_usb_packets ? 512 : 64); 2312 retval = 2313 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0), 2314 GET_SYSTEM_PORT_STATUS, 2315 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2316 0x0000, 0x0000, &vub300->system_port_status, 2317 sizeof(vub300->system_port_status), HZ); 2318 if (retval < 0) { 2319 goto error4; 2320 } else if (sizeof(vub300->system_port_status) == retval) { 2321 vub300->card_present = 2322 (0x0001 & vub300->system_port_status.port_flags) ? 1 : 0; 2323 vub300->read_only = 2324 (0x0010 & vub300->system_port_status.port_flags) ? 1 : 0; 2325 } else { 2326 goto error4; 2327 } 2328 usb_set_intfdata(interface, vub300); 2329 INIT_DELAYED_WORK(&vub300->pollwork, vub300_pollwork_thread); 2330 INIT_WORK(&vub300->cmndwork, vub300_cmndwork_thread); 2331 INIT_WORK(&vub300->deadwork, vub300_deadwork_thread); 2332 kref_init(&vub300->kref); 2333 init_timer(&vub300->sg_transfer_timer); 2334 vub300->sg_transfer_timer.data = (unsigned long)vub300; 2335 vub300->sg_transfer_timer.function = vub300_sg_timed_out; 2336 kref_get(&vub300->kref); 2337 init_timer(&vub300->inactivity_timer); 2338 vub300->inactivity_timer.data = (unsigned long)vub300; 2339 vub300->inactivity_timer.function = vub300_inactivity_timer_expired; 2340 vub300->inactivity_timer.expires = jiffies + HZ; 2341 add_timer(&vub300->inactivity_timer); 2342 if (vub300->card_present) 2343 dev_info(&vub300->udev->dev, 2344 "USB vub300 remote SDIO host controller[%d]" 2345 "connected with SD/SDIO card inserted\n", 2346 interface_to_InterfaceNumber(interface)); 2347 else 2348 dev_info(&vub300->udev->dev, 2349 "USB vub300 remote SDIO host controller[%d]" 2350 "connected with no SD/SDIO card inserted\n", 2351 interface_to_InterfaceNumber(interface)); 2352 mmc_add_host(mmc); 2353 return 0; 2354 error5: 2355 mmc_free_host(mmc); 2356 /* 2357 * and hence also frees vub300 2358 * which is contained at the end of struct mmc 2359 */ 2360 error4: 2361 usb_free_urb(command_res_urb); 2362 error1: 2363 usb_free_urb(command_out_urb); 2364 error0: 2365 usb_put_dev(udev); 2366 return retval; 2367 } 2368 2369 static void vub300_disconnect(struct usb_interface *interface) 2370 { /* NOT irq */ 2371 struct vub300_mmc_host *vub300 = usb_get_intfdata(interface); 2372 if (!vub300 || !vub300->mmc) { 2373 return; 2374 } else { 2375 struct mmc_host *mmc = vub300->mmc; 2376 if (!vub300->mmc) { 2377 return; 2378 } else { 2379 int ifnum = interface_to_InterfaceNumber(interface); 2380 usb_set_intfdata(interface, NULL); 2381 /* prevent more I/O from starting */ 2382 vub300->interface = NULL; 2383 kref_put(&vub300->kref, vub300_delete); 2384 mmc_remove_host(mmc); 2385 pr_info("USB vub300 remote SDIO host controller[%d]" 2386 " now disconnected", ifnum); 2387 return; 2388 } 2389 } 2390 } 2391 2392 #ifdef CONFIG_PM 2393 static int vub300_suspend(struct usb_interface *intf, pm_message_t message) 2394 { 2395 return 0; 2396 } 2397 2398 static int vub300_resume(struct usb_interface *intf) 2399 { 2400 return 0; 2401 } 2402 #else 2403 #define vub300_suspend NULL 2404 #define vub300_resume NULL 2405 #endif 2406 static int vub300_pre_reset(struct usb_interface *intf) 2407 { /* NOT irq */ 2408 struct vub300_mmc_host *vub300 = usb_get_intfdata(intf); 2409 mutex_lock(&vub300->cmd_mutex); 2410 return 0; 2411 } 2412 2413 static int vub300_post_reset(struct usb_interface *intf) 2414 { /* NOT irq */ 2415 struct vub300_mmc_host *vub300 = usb_get_intfdata(intf); 2416 /* we are sure no URBs are active - no locking needed */ 2417 vub300->errors = -EPIPE; 2418 mutex_unlock(&vub300->cmd_mutex); 2419 return 0; 2420 } 2421 2422 static struct usb_driver vub300_driver = { 2423 .name = "vub300", 2424 .probe = vub300_probe, 2425 .disconnect = vub300_disconnect, 2426 .suspend = vub300_suspend, 2427 .resume = vub300_resume, 2428 .pre_reset = vub300_pre_reset, 2429 .post_reset = vub300_post_reset, 2430 .id_table = vub300_table, 2431 .supports_autosuspend = 1, 2432 }; 2433 2434 static int __init vub300_init(void) 2435 { /* NOT irq */ 2436 int result; 2437 2438 pr_info("VUB300 Driver rom wait states = %02X irqpoll timeout = %04X", 2439 firmware_rom_wait_states, 0x0FFFF & firmware_irqpoll_timeout); 2440 cmndworkqueue = create_singlethread_workqueue("kvub300c"); 2441 if (!cmndworkqueue) { 2442 pr_err("not enough memory for the REQUEST workqueue"); 2443 result = -ENOMEM; 2444 goto out1; 2445 } 2446 pollworkqueue = create_singlethread_workqueue("kvub300p"); 2447 if (!pollworkqueue) { 2448 pr_err("not enough memory for the IRQPOLL workqueue"); 2449 result = -ENOMEM; 2450 goto out2; 2451 } 2452 deadworkqueue = create_singlethread_workqueue("kvub300d"); 2453 if (!deadworkqueue) { 2454 pr_err("not enough memory for the EXPIRED workqueue"); 2455 result = -ENOMEM; 2456 goto out3; 2457 } 2458 result = usb_register(&vub300_driver); 2459 if (result) { 2460 pr_err("usb_register failed. Error number %d", result); 2461 goto out4; 2462 } 2463 return 0; 2464 out4: 2465 destroy_workqueue(deadworkqueue); 2466 out3: 2467 destroy_workqueue(pollworkqueue); 2468 out2: 2469 destroy_workqueue(cmndworkqueue); 2470 out1: 2471 return result; 2472 } 2473 2474 static void __exit vub300_exit(void) 2475 { 2476 usb_deregister(&vub300_driver); 2477 flush_workqueue(cmndworkqueue); 2478 flush_workqueue(pollworkqueue); 2479 flush_workqueue(deadworkqueue); 2480 destroy_workqueue(cmndworkqueue); 2481 destroy_workqueue(pollworkqueue); 2482 destroy_workqueue(deadworkqueue); 2483 } 2484 2485 module_init(vub300_init); 2486 module_exit(vub300_exit); 2487 2488 MODULE_AUTHOR("Tony Olech <tony.olech@elandigitalsystems.com>"); 2489 MODULE_DESCRIPTION("VUB300 USB to SD/MMC/SDIO adapter driver"); 2490 MODULE_LICENSE("GPL"); 2491