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 644 vub300->irqs_queued += 1; 645 vub300->irq_disabled = 0; 646 mutex_unlock(&vub300->irq_mutex); 647 break; 648 } 649 case RESPONSE_NO_INTERRUPT: 650 vub300_queue_poll_work(vub300, 1); 651 break; 652 default: 653 break; 654 } 655 } 656 657 static void __do_poll(struct vub300_mmc_host *vub300) 658 { 659 /* cmd_mutex is held by vub300_pollwork_thread */ 660 unsigned long commretval; 661 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 662 init_completion(&vub300->irqpoll_complete); 663 send_irqpoll(vub300); 664 commretval = wait_for_completion_timeout(&vub300->irqpoll_complete, 665 msecs_to_jiffies(500)); 666 if (vub300->usb_transport_fail) { 667 /* no need to do anything */ 668 } else if (commretval == 0) { 669 vub300->usb_timed_out = 1; 670 usb_kill_urb(vub300->command_out_urb); 671 usb_kill_urb(vub300->command_res_urb); 672 } else { /* commretval > 0 */ 673 __vub300_irqpoll_response(vub300); 674 } 675 } 676 677 /* this thread runs only when the driver 678 * is trying to poll the device for an IRQ 679 */ 680 static void vub300_pollwork_thread(struct work_struct *work) 681 { /* NOT irq */ 682 struct vub300_mmc_host *vub300 = container_of(work, 683 struct vub300_mmc_host, pollwork.work); 684 if (!vub300->interface) { 685 kref_put(&vub300->kref, vub300_delete); 686 return; 687 } 688 mutex_lock(&vub300->cmd_mutex); 689 if (vub300->cmd) { 690 vub300_queue_poll_work(vub300, 1); 691 } else if (!vub300->card_present) { 692 /* no need to do anything */ 693 } else { /* vub300->card_present */ 694 mutex_lock(&vub300->irq_mutex); 695 if (!vub300->irq_enabled) { 696 mutex_unlock(&vub300->irq_mutex); 697 } else if (vub300->irqs_queued) { 698 vub300->irqs_queued -= 1; 699 mmc_signal_sdio_irq(vub300->mmc); 700 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 701 mutex_unlock(&vub300->irq_mutex); 702 } else { /* NOT vub300->irqs_queued */ 703 mutex_unlock(&vub300->irq_mutex); 704 __do_poll(vub300); 705 } 706 } 707 mutex_unlock(&vub300->cmd_mutex); 708 kref_put(&vub300->kref, vub300_delete); 709 } 710 711 static void vub300_deadwork_thread(struct work_struct *work) 712 { /* NOT irq */ 713 struct vub300_mmc_host *vub300 = 714 container_of(work, struct vub300_mmc_host, deadwork); 715 if (!vub300->interface) { 716 kref_put(&vub300->kref, vub300_delete); 717 return; 718 } 719 mutex_lock(&vub300->cmd_mutex); 720 if (vub300->cmd) { 721 /* 722 * a command got in as the inactivity 723 * timer expired - so we just let the 724 * processing of the command show if 725 * the device is dead 726 */ 727 } else if (vub300->card_present) { 728 check_vub300_port_status(vub300); 729 } else if (vub300->mmc && vub300->mmc->card && 730 mmc_card_present(vub300->mmc->card)) { 731 /* 732 * the MMC core must not have responded 733 * to the previous indication - lets 734 * hope that it eventually does so we 735 * will just ignore this for now 736 */ 737 } else { 738 check_vub300_port_status(vub300); 739 } 740 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 741 mutex_unlock(&vub300->cmd_mutex); 742 kref_put(&vub300->kref, vub300_delete); 743 } 744 745 static void vub300_inactivity_timer_expired(unsigned long data) 746 { /* softirq */ 747 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)data; 748 if (!vub300->interface) { 749 kref_put(&vub300->kref, vub300_delete); 750 } else if (vub300->cmd) { 751 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 752 } else { 753 vub300_queue_dead_work(vub300); 754 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 755 } 756 } 757 758 static int vub300_response_error(u8 error_code) 759 { 760 switch (error_code) { 761 case SD_ERROR_PIO_TIMEOUT: 762 case SD_ERROR_1BIT_TIMEOUT: 763 case SD_ERROR_4BIT_TIMEOUT: 764 return -ETIMEDOUT; 765 case SD_ERROR_STAT_DATA: 766 case SD_ERROR_OVERRUN: 767 case SD_ERROR_STAT_CMD: 768 case SD_ERROR_STAT_CMD_TIMEOUT: 769 case SD_ERROR_SDCRDY_STUCK: 770 case SD_ERROR_UNHANDLED: 771 case SD_ERROR_1BIT_CRC_WRONG: 772 case SD_ERROR_4BIT_CRC_WRONG: 773 case SD_ERROR_1BIT_CRC_ERROR: 774 case SD_ERROR_4BIT_CRC_ERROR: 775 case SD_ERROR_NO_CMD_ENDBIT: 776 case SD_ERROR_NO_1BIT_DATEND: 777 case SD_ERROR_NO_4BIT_DATEND: 778 case SD_ERROR_1BIT_DATA_TIMEOUT: 779 case SD_ERROR_4BIT_DATA_TIMEOUT: 780 case SD_ERROR_1BIT_UNEXPECTED_TIMEOUT: 781 case SD_ERROR_4BIT_UNEXPECTED_TIMEOUT: 782 return -EILSEQ; 783 case 33: 784 return -EILSEQ; 785 case SD_ERROR_ILLEGAL_COMMAND: 786 return -EINVAL; 787 case SD_ERROR_NO_DEVICE: 788 return -ENOMEDIUM; 789 default: 790 return -ENODEV; 791 } 792 } 793 794 static void command_res_completed(struct urb *urb) 795 { /* urb completion handler - hardirq */ 796 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context; 797 if (urb->status) { 798 /* we have to let the initiator handle the error */ 799 } else if (vub300->command_res_urb->actual_length == 0) { 800 /* 801 * we have seen this happen once or twice and 802 * we suspect a buggy USB host controller 803 */ 804 } else if (!vub300->data) { 805 /* this means that the command (typically CMD52) succeeded */ 806 } else if (vub300->resp.common.header_type != 0x02) { 807 /* 808 * this is an error response from the VUB300 chip 809 * and we let the initiator handle it 810 */ 811 } else if (vub300->urb) { 812 vub300->cmd->error = 813 vub300_response_error(vub300->resp.error.error_code); 814 usb_unlink_urb(vub300->urb); 815 } else { 816 vub300->cmd->error = 817 vub300_response_error(vub300->resp.error.error_code); 818 usb_sg_cancel(&vub300->sg_request); 819 } 820 complete(&vub300->command_complete); /* got_response_in */ 821 } 822 823 static void command_out_completed(struct urb *urb) 824 { /* urb completion handler - hardirq */ 825 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context; 826 if (urb->status) { 827 complete(&vub300->command_complete); 828 } else { 829 int ret; 830 unsigned int pipe = 831 usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep); 832 usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe, 833 &vub300->resp, sizeof(vub300->resp), 834 command_res_completed, vub300); 835 vub300->command_res_urb->actual_length = 0; 836 ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC); 837 if (ret == 0) { 838 /* 839 * the urb completion handler will call 840 * our completion handler 841 */ 842 } else { 843 /* 844 * and thus we only call it directly 845 * when it will not be called 846 */ 847 complete(&vub300->command_complete); 848 } 849 } 850 } 851 852 /* 853 * the STUFF bits are masked out for the comparisons 854 */ 855 static void snoop_block_size_and_bus_width(struct vub300_mmc_host *vub300, 856 u32 cmd_arg) 857 { 858 if ((0xFBFFFE00 & cmd_arg) == 0x80022200) 859 vub300->fbs[1] = (cmd_arg << 8) | (0x00FF & vub300->fbs[1]); 860 else if ((0xFBFFFE00 & cmd_arg) == 0x80022000) 861 vub300->fbs[1] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[1]); 862 else if ((0xFBFFFE00 & cmd_arg) == 0x80042200) 863 vub300->fbs[2] = (cmd_arg << 8) | (0x00FF & vub300->fbs[2]); 864 else if ((0xFBFFFE00 & cmd_arg) == 0x80042000) 865 vub300->fbs[2] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[2]); 866 else if ((0xFBFFFE00 & cmd_arg) == 0x80062200) 867 vub300->fbs[3] = (cmd_arg << 8) | (0x00FF & vub300->fbs[3]); 868 else if ((0xFBFFFE00 & cmd_arg) == 0x80062000) 869 vub300->fbs[3] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[3]); 870 else if ((0xFBFFFE00 & cmd_arg) == 0x80082200) 871 vub300->fbs[4] = (cmd_arg << 8) | (0x00FF & vub300->fbs[4]); 872 else if ((0xFBFFFE00 & cmd_arg) == 0x80082000) 873 vub300->fbs[4] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[4]); 874 else if ((0xFBFFFE00 & cmd_arg) == 0x800A2200) 875 vub300->fbs[5] = (cmd_arg << 8) | (0x00FF & vub300->fbs[5]); 876 else if ((0xFBFFFE00 & cmd_arg) == 0x800A2000) 877 vub300->fbs[5] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[5]); 878 else if ((0xFBFFFE00 & cmd_arg) == 0x800C2200) 879 vub300->fbs[6] = (cmd_arg << 8) | (0x00FF & vub300->fbs[6]); 880 else if ((0xFBFFFE00 & cmd_arg) == 0x800C2000) 881 vub300->fbs[6] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[6]); 882 else if ((0xFBFFFE00 & cmd_arg) == 0x800E2200) 883 vub300->fbs[7] = (cmd_arg << 8) | (0x00FF & vub300->fbs[7]); 884 else if ((0xFBFFFE00 & cmd_arg) == 0x800E2000) 885 vub300->fbs[7] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[7]); 886 else if ((0xFBFFFE03 & cmd_arg) == 0x80000E00) 887 vub300->bus_width = 1; 888 else if ((0xFBFFFE03 & cmd_arg) == 0x80000E02) 889 vub300->bus_width = 4; 890 } 891 892 static void send_command(struct vub300_mmc_host *vub300) 893 { 894 /* cmd_mutex is held by vub300_cmndwork_thread */ 895 struct mmc_command *cmd = vub300->cmd; 896 struct mmc_data *data = vub300->data; 897 int retval; 898 int i; 899 u8 response_type; 900 if (vub300->app_spec) { 901 switch (cmd->opcode) { 902 case 6: 903 response_type = SDRT_1; 904 vub300->resp_len = 6; 905 if (0x00000000 == (0x00000003 & cmd->arg)) 906 vub300->bus_width = 1; 907 else if (0x00000002 == (0x00000003 & cmd->arg)) 908 vub300->bus_width = 4; 909 else 910 dev_err(&vub300->udev->dev, 911 "unexpected ACMD6 bus_width=%d\n", 912 0x00000003 & cmd->arg); 913 break; 914 case 13: 915 response_type = SDRT_1; 916 vub300->resp_len = 6; 917 break; 918 case 22: 919 response_type = SDRT_1; 920 vub300->resp_len = 6; 921 break; 922 case 23: 923 response_type = SDRT_1; 924 vub300->resp_len = 6; 925 break; 926 case 41: 927 response_type = SDRT_3; 928 vub300->resp_len = 6; 929 break; 930 case 42: 931 response_type = SDRT_1; 932 vub300->resp_len = 6; 933 break; 934 case 51: 935 response_type = SDRT_1; 936 vub300->resp_len = 6; 937 break; 938 case 55: 939 response_type = SDRT_1; 940 vub300->resp_len = 6; 941 break; 942 default: 943 vub300->resp_len = 0; 944 cmd->error = -EINVAL; 945 complete(&vub300->command_complete); 946 return; 947 } 948 vub300->app_spec = 0; 949 } else { 950 switch (cmd->opcode) { 951 case 0: 952 response_type = SDRT_NONE; 953 vub300->resp_len = 0; 954 break; 955 case 1: 956 response_type = SDRT_3; 957 vub300->resp_len = 6; 958 break; 959 case 2: 960 response_type = SDRT_2; 961 vub300->resp_len = 17; 962 break; 963 case 3: 964 response_type = SDRT_6; 965 vub300->resp_len = 6; 966 break; 967 case 4: 968 response_type = SDRT_NONE; 969 vub300->resp_len = 0; 970 break; 971 case 5: 972 response_type = SDRT_4; 973 vub300->resp_len = 6; 974 break; 975 case 6: 976 response_type = SDRT_1; 977 vub300->resp_len = 6; 978 break; 979 case 7: 980 response_type = SDRT_1B; 981 vub300->resp_len = 6; 982 break; 983 case 8: 984 response_type = SDRT_7; 985 vub300->resp_len = 6; 986 break; 987 case 9: 988 response_type = SDRT_2; 989 vub300->resp_len = 17; 990 break; 991 case 10: 992 response_type = SDRT_2; 993 vub300->resp_len = 17; 994 break; 995 case 12: 996 response_type = SDRT_1B; 997 vub300->resp_len = 6; 998 break; 999 case 13: 1000 response_type = SDRT_1; 1001 vub300->resp_len = 6; 1002 break; 1003 case 15: 1004 response_type = SDRT_NONE; 1005 vub300->resp_len = 0; 1006 break; 1007 case 16: 1008 for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++) 1009 vub300->fbs[i] = 0xFFFF & cmd->arg; 1010 response_type = SDRT_1; 1011 vub300->resp_len = 6; 1012 break; 1013 case 17: 1014 case 18: 1015 case 24: 1016 case 25: 1017 case 27: 1018 response_type = SDRT_1; 1019 vub300->resp_len = 6; 1020 break; 1021 case 28: 1022 case 29: 1023 response_type = SDRT_1B; 1024 vub300->resp_len = 6; 1025 break; 1026 case 30: 1027 case 32: 1028 case 33: 1029 response_type = SDRT_1; 1030 vub300->resp_len = 6; 1031 break; 1032 case 38: 1033 response_type = SDRT_1B; 1034 vub300->resp_len = 6; 1035 break; 1036 case 42: 1037 response_type = SDRT_1; 1038 vub300->resp_len = 6; 1039 break; 1040 case 52: 1041 response_type = SDRT_5; 1042 vub300->resp_len = 6; 1043 snoop_block_size_and_bus_width(vub300, cmd->arg); 1044 break; 1045 case 53: 1046 response_type = SDRT_5; 1047 vub300->resp_len = 6; 1048 break; 1049 case 55: 1050 response_type = SDRT_1; 1051 vub300->resp_len = 6; 1052 vub300->app_spec = 1; 1053 break; 1054 case 56: 1055 response_type = SDRT_1; 1056 vub300->resp_len = 6; 1057 break; 1058 default: 1059 vub300->resp_len = 0; 1060 cmd->error = -EINVAL; 1061 complete(&vub300->command_complete); 1062 return; 1063 } 1064 } 1065 /* 1066 * it is a shame that we can not use "sizeof(struct sd_command_header)" 1067 * this is because the packet _must_ be padded to 64 bytes 1068 */ 1069 vub300->cmnd.head.header_size = 20; 1070 vub300->cmnd.head.header_type = 0x00; 1071 vub300->cmnd.head.port_number = 0; /* "0" means port 1 */ 1072 vub300->cmnd.head.command_type = 0x00; /* standard read command */ 1073 vub300->cmnd.head.response_type = response_type; 1074 vub300->cmnd.head.command_index = cmd->opcode; 1075 vub300->cmnd.head.arguments[0] = cmd->arg >> 24; 1076 vub300->cmnd.head.arguments[1] = cmd->arg >> 16; 1077 vub300->cmnd.head.arguments[2] = cmd->arg >> 8; 1078 vub300->cmnd.head.arguments[3] = cmd->arg >> 0; 1079 if (cmd->opcode == 52) { 1080 int fn = 0x7 & (cmd->arg >> 28); 1081 vub300->cmnd.head.block_count[0] = 0; 1082 vub300->cmnd.head.block_count[1] = 0; 1083 vub300->cmnd.head.block_size[0] = (vub300->fbs[fn] >> 8) & 0xFF; 1084 vub300->cmnd.head.block_size[1] = (vub300->fbs[fn] >> 0) & 0xFF; 1085 vub300->cmnd.head.command_type = 0x00; 1086 vub300->cmnd.head.transfer_size[0] = 0; 1087 vub300->cmnd.head.transfer_size[1] = 0; 1088 vub300->cmnd.head.transfer_size[2] = 0; 1089 vub300->cmnd.head.transfer_size[3] = 0; 1090 } else if (!data) { 1091 vub300->cmnd.head.block_count[0] = 0; 1092 vub300->cmnd.head.block_count[1] = 0; 1093 vub300->cmnd.head.block_size[0] = (vub300->fbs[0] >> 8) & 0xFF; 1094 vub300->cmnd.head.block_size[1] = (vub300->fbs[0] >> 0) & 0xFF; 1095 vub300->cmnd.head.command_type = 0x00; 1096 vub300->cmnd.head.transfer_size[0] = 0; 1097 vub300->cmnd.head.transfer_size[1] = 0; 1098 vub300->cmnd.head.transfer_size[2] = 0; 1099 vub300->cmnd.head.transfer_size[3] = 0; 1100 } else if (cmd->opcode == 53) { 1101 int fn = 0x7 & (cmd->arg >> 28); 1102 if (0x08 & vub300->cmnd.head.arguments[0]) { /* BLOCK MODE */ 1103 vub300->cmnd.head.block_count[0] = 1104 (data->blocks >> 8) & 0xFF; 1105 vub300->cmnd.head.block_count[1] = 1106 (data->blocks >> 0) & 0xFF; 1107 vub300->cmnd.head.block_size[0] = 1108 (data->blksz >> 8) & 0xFF; 1109 vub300->cmnd.head.block_size[1] = 1110 (data->blksz >> 0) & 0xFF; 1111 } else { /* BYTE MODE */ 1112 vub300->cmnd.head.block_count[0] = 0; 1113 vub300->cmnd.head.block_count[1] = 0; 1114 vub300->cmnd.head.block_size[0] = 1115 (vub300->datasize >> 8) & 0xFF; 1116 vub300->cmnd.head.block_size[1] = 1117 (vub300->datasize >> 0) & 0xFF; 1118 } 1119 vub300->cmnd.head.command_type = 1120 (MMC_DATA_READ & data->flags) ? 0x00 : 0x80; 1121 vub300->cmnd.head.transfer_size[0] = 1122 (vub300->datasize >> 24) & 0xFF; 1123 vub300->cmnd.head.transfer_size[1] = 1124 (vub300->datasize >> 16) & 0xFF; 1125 vub300->cmnd.head.transfer_size[2] = 1126 (vub300->datasize >> 8) & 0xFF; 1127 vub300->cmnd.head.transfer_size[3] = 1128 (vub300->datasize >> 0) & 0xFF; 1129 if (vub300->datasize < vub300->fbs[fn]) { 1130 vub300->cmnd.head.block_count[0] = 0; 1131 vub300->cmnd.head.block_count[1] = 0; 1132 } 1133 } else { 1134 vub300->cmnd.head.block_count[0] = (data->blocks >> 8) & 0xFF; 1135 vub300->cmnd.head.block_count[1] = (data->blocks >> 0) & 0xFF; 1136 vub300->cmnd.head.block_size[0] = (data->blksz >> 8) & 0xFF; 1137 vub300->cmnd.head.block_size[1] = (data->blksz >> 0) & 0xFF; 1138 vub300->cmnd.head.command_type = 1139 (MMC_DATA_READ & data->flags) ? 0x00 : 0x80; 1140 vub300->cmnd.head.transfer_size[0] = 1141 (vub300->datasize >> 24) & 0xFF; 1142 vub300->cmnd.head.transfer_size[1] = 1143 (vub300->datasize >> 16) & 0xFF; 1144 vub300->cmnd.head.transfer_size[2] = 1145 (vub300->datasize >> 8) & 0xFF; 1146 vub300->cmnd.head.transfer_size[3] = 1147 (vub300->datasize >> 0) & 0xFF; 1148 if (vub300->datasize < vub300->fbs[0]) { 1149 vub300->cmnd.head.block_count[0] = 0; 1150 vub300->cmnd.head.block_count[1] = 0; 1151 } 1152 } 1153 if (vub300->cmnd.head.block_size[0] || vub300->cmnd.head.block_size[1]) { 1154 u16 block_size = vub300->cmnd.head.block_size[1] | 1155 (vub300->cmnd.head.block_size[0] << 8); 1156 u16 block_boundary = FIRMWARE_BLOCK_BOUNDARY - 1157 (FIRMWARE_BLOCK_BOUNDARY % block_size); 1158 vub300->cmnd.head.block_boundary[0] = 1159 (block_boundary >> 8) & 0xFF; 1160 vub300->cmnd.head.block_boundary[1] = 1161 (block_boundary >> 0) & 0xFF; 1162 } else { 1163 vub300->cmnd.head.block_boundary[0] = 0; 1164 vub300->cmnd.head.block_boundary[1] = 0; 1165 } 1166 usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev, 1167 usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep), 1168 &vub300->cmnd, sizeof(vub300->cmnd), 1169 command_out_completed, vub300); 1170 retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL); 1171 if (retval < 0) { 1172 cmd->error = retval; 1173 complete(&vub300->command_complete); 1174 return; 1175 } else { 1176 return; 1177 } 1178 } 1179 1180 /* 1181 * timer callback runs in atomic mode 1182 * so it cannot call usb_kill_urb() 1183 */ 1184 static void vub300_sg_timed_out(unsigned long data) 1185 { 1186 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)data; 1187 vub300->usb_timed_out = 1; 1188 usb_sg_cancel(&vub300->sg_request); 1189 usb_unlink_urb(vub300->command_out_urb); 1190 usb_unlink_urb(vub300->command_res_urb); 1191 } 1192 1193 static u16 roundup_to_multiple_of_64(u16 number) 1194 { 1195 return 0xFFC0 & (0x3F + number); 1196 } 1197 1198 /* 1199 * this is a separate function to solve the 80 column width restriction 1200 */ 1201 static void __download_offload_pseudocode(struct vub300_mmc_host *vub300, 1202 const struct firmware *fw) 1203 { 1204 u8 register_count = 0; 1205 u16 ts = 0; 1206 u16 interrupt_size = 0; 1207 const u8 *data = fw->data; 1208 int size = fw->size; 1209 u8 c; 1210 dev_info(&vub300->udev->dev, "using %s for SDIO offload processing\n", 1211 vub300->vub_name); 1212 do { 1213 c = *data++; 1214 } while (size-- && c); /* skip comment */ 1215 dev_info(&vub300->udev->dev, "using offload firmware %s %s\n", fw->data, 1216 vub300->vub_name); 1217 if (size < 4) { 1218 dev_err(&vub300->udev->dev, 1219 "corrupt offload pseudocode in firmware %s\n", 1220 vub300->vub_name); 1221 strncpy(vub300->vub_name, "corrupt offload pseudocode", 1222 sizeof(vub300->vub_name)); 1223 return; 1224 } 1225 interrupt_size += *data++; 1226 size -= 1; 1227 interrupt_size <<= 8; 1228 interrupt_size += *data++; 1229 size -= 1; 1230 if (interrupt_size < size) { 1231 u16 xfer_length = roundup_to_multiple_of_64(interrupt_size); 1232 u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL); 1233 if (xfer_buffer) { 1234 int retval; 1235 memcpy(xfer_buffer, data, interrupt_size); 1236 memset(xfer_buffer + interrupt_size, 0, 1237 xfer_length - interrupt_size); 1238 size -= interrupt_size; 1239 data += interrupt_size; 1240 retval = 1241 usb_control_msg(vub300->udev, 1242 usb_sndctrlpipe(vub300->udev, 0), 1243 SET_INTERRUPT_PSEUDOCODE, 1244 USB_DIR_OUT | USB_TYPE_VENDOR | 1245 USB_RECIP_DEVICE, 0x0000, 0x0000, 1246 xfer_buffer, xfer_length, HZ); 1247 kfree(xfer_buffer); 1248 if (retval < 0) { 1249 strncpy(vub300->vub_name, 1250 "SDIO pseudocode download failed", 1251 sizeof(vub300->vub_name)); 1252 return; 1253 } 1254 } else { 1255 dev_err(&vub300->udev->dev, 1256 "not enough memory for xfer buffer to send" 1257 " INTERRUPT_PSEUDOCODE for %s %s\n", fw->data, 1258 vub300->vub_name); 1259 strncpy(vub300->vub_name, 1260 "SDIO interrupt pseudocode download failed", 1261 sizeof(vub300->vub_name)); 1262 return; 1263 } 1264 } else { 1265 dev_err(&vub300->udev->dev, 1266 "corrupt interrupt pseudocode in firmware %s %s\n", 1267 fw->data, vub300->vub_name); 1268 strncpy(vub300->vub_name, "corrupt interrupt pseudocode", 1269 sizeof(vub300->vub_name)); 1270 return; 1271 } 1272 ts += *data++; 1273 size -= 1; 1274 ts <<= 8; 1275 ts += *data++; 1276 size -= 1; 1277 if (ts < size) { 1278 u16 xfer_length = roundup_to_multiple_of_64(ts); 1279 u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL); 1280 if (xfer_buffer) { 1281 int retval; 1282 memcpy(xfer_buffer, data, ts); 1283 memset(xfer_buffer + ts, 0, 1284 xfer_length - ts); 1285 size -= ts; 1286 data += ts; 1287 retval = 1288 usb_control_msg(vub300->udev, 1289 usb_sndctrlpipe(vub300->udev, 0), 1290 SET_TRANSFER_PSEUDOCODE, 1291 USB_DIR_OUT | USB_TYPE_VENDOR | 1292 USB_RECIP_DEVICE, 0x0000, 0x0000, 1293 xfer_buffer, xfer_length, HZ); 1294 kfree(xfer_buffer); 1295 if (retval < 0) { 1296 strncpy(vub300->vub_name, 1297 "SDIO pseudocode download failed", 1298 sizeof(vub300->vub_name)); 1299 return; 1300 } 1301 } else { 1302 dev_err(&vub300->udev->dev, 1303 "not enough memory for xfer buffer to send" 1304 " TRANSFER_PSEUDOCODE for %s %s\n", fw->data, 1305 vub300->vub_name); 1306 strncpy(vub300->vub_name, 1307 "SDIO transfer pseudocode download failed", 1308 sizeof(vub300->vub_name)); 1309 return; 1310 } 1311 } else { 1312 dev_err(&vub300->udev->dev, 1313 "corrupt transfer pseudocode in firmware %s %s\n", 1314 fw->data, vub300->vub_name); 1315 strncpy(vub300->vub_name, "corrupt transfer pseudocode", 1316 sizeof(vub300->vub_name)); 1317 return; 1318 } 1319 register_count += *data++; 1320 size -= 1; 1321 if (register_count * 4 == size) { 1322 int I = vub300->dynamic_register_count = register_count; 1323 int i = 0; 1324 while (I--) { 1325 unsigned int func_num = 0; 1326 vub300->sdio_register[i].func_num = *data++; 1327 size -= 1; 1328 func_num += *data++; 1329 size -= 1; 1330 func_num <<= 8; 1331 func_num += *data++; 1332 size -= 1; 1333 func_num <<= 8; 1334 func_num += *data++; 1335 size -= 1; 1336 vub300->sdio_register[i].sdio_reg = func_num; 1337 vub300->sdio_register[i].activate = 1; 1338 vub300->sdio_register[i].prepared = 0; 1339 i += 1; 1340 } 1341 dev_info(&vub300->udev->dev, 1342 "initialized %d dynamic pseudocode registers\n", 1343 vub300->dynamic_register_count); 1344 return; 1345 } else { 1346 dev_err(&vub300->udev->dev, 1347 "corrupt dynamic registers in firmware %s\n", 1348 vub300->vub_name); 1349 strncpy(vub300->vub_name, "corrupt dynamic registers", 1350 sizeof(vub300->vub_name)); 1351 return; 1352 } 1353 } 1354 1355 /* 1356 * if the binary containing the EMPTY PseudoCode can not be found 1357 * vub300->vub_name is set anyway in order to prevent an automatic retry 1358 */ 1359 static void download_offload_pseudocode(struct vub300_mmc_host *vub300) 1360 { 1361 struct mmc_card *card = vub300->mmc->card; 1362 int sdio_funcs = card->sdio_funcs; 1363 const struct firmware *fw = NULL; 1364 int l = snprintf(vub300->vub_name, sizeof(vub300->vub_name), 1365 "vub_%04X%04X", card->cis.vendor, card->cis.device); 1366 int n = 0; 1367 int retval; 1368 for (n = 0; n < sdio_funcs; n++) { 1369 struct sdio_func *sf = card->sdio_func[n]; 1370 l += snprintf(vub300->vub_name + l, 1371 sizeof(vub300->vub_name) - l, "_%04X%04X", 1372 sf->vendor, sf->device); 1373 } 1374 snprintf(vub300->vub_name + l, sizeof(vub300->vub_name) - l, ".bin"); 1375 dev_info(&vub300->udev->dev, "requesting offload firmware %s\n", 1376 vub300->vub_name); 1377 retval = request_firmware(&fw, vub300->vub_name, &card->dev); 1378 if (retval < 0) { 1379 strncpy(vub300->vub_name, "vub_default.bin", 1380 sizeof(vub300->vub_name)); 1381 retval = request_firmware(&fw, vub300->vub_name, &card->dev); 1382 if (retval < 0) { 1383 strncpy(vub300->vub_name, 1384 "no SDIO offload firmware found", 1385 sizeof(vub300->vub_name)); 1386 } else { 1387 __download_offload_pseudocode(vub300, fw); 1388 release_firmware(fw); 1389 } 1390 } else { 1391 __download_offload_pseudocode(vub300, fw); 1392 release_firmware(fw); 1393 } 1394 } 1395 1396 static void vub300_usb_bulk_msg_completion(struct urb *urb) 1397 { /* urb completion handler - hardirq */ 1398 complete((struct completion *)urb->context); 1399 } 1400 1401 static int vub300_usb_bulk_msg(struct vub300_mmc_host *vub300, 1402 unsigned int pipe, void *data, int len, 1403 int *actual_length, int timeout_msecs) 1404 { 1405 /* cmd_mutex is held by vub300_cmndwork_thread */ 1406 struct usb_device *usb_dev = vub300->udev; 1407 struct completion done; 1408 int retval; 1409 vub300->urb = usb_alloc_urb(0, GFP_KERNEL); 1410 if (!vub300->urb) 1411 return -ENOMEM; 1412 usb_fill_bulk_urb(vub300->urb, usb_dev, pipe, data, len, 1413 vub300_usb_bulk_msg_completion, NULL); 1414 init_completion(&done); 1415 vub300->urb->context = &done; 1416 vub300->urb->actual_length = 0; 1417 retval = usb_submit_urb(vub300->urb, GFP_KERNEL); 1418 if (unlikely(retval)) 1419 goto out; 1420 if (!wait_for_completion_timeout 1421 (&done, msecs_to_jiffies(timeout_msecs))) { 1422 retval = -ETIMEDOUT; 1423 usb_kill_urb(vub300->urb); 1424 } else { 1425 retval = vub300->urb->status; 1426 } 1427 out: 1428 *actual_length = vub300->urb->actual_length; 1429 usb_free_urb(vub300->urb); 1430 vub300->urb = NULL; 1431 return retval; 1432 } 1433 1434 static int __command_read_data(struct vub300_mmc_host *vub300, 1435 struct mmc_command *cmd, struct mmc_data *data) 1436 { 1437 /* cmd_mutex is held by vub300_cmndwork_thread */ 1438 int linear_length = vub300->datasize; 1439 int padded_length = vub300->large_usb_packets ? 1440 ((511 + linear_length) >> 9) << 9 : 1441 ((63 + linear_length) >> 6) << 6; 1442 if ((padded_length == linear_length) || !pad_input_to_usb_pkt) { 1443 int result; 1444 unsigned pipe; 1445 pipe = usb_rcvbulkpipe(vub300->udev, vub300->data_inp_ep); 1446 result = usb_sg_init(&vub300->sg_request, vub300->udev, 1447 pipe, 0, data->sg, 1448 data->sg_len, 0, GFP_KERNEL); 1449 if (result < 0) { 1450 usb_unlink_urb(vub300->command_out_urb); 1451 usb_unlink_urb(vub300->command_res_urb); 1452 cmd->error = result; 1453 data->bytes_xfered = 0; 1454 return 0; 1455 } else { 1456 vub300->sg_transfer_timer.expires = 1457 jiffies + msecs_to_jiffies(2000 + 1458 (linear_length / 16384)); 1459 add_timer(&vub300->sg_transfer_timer); 1460 usb_sg_wait(&vub300->sg_request); 1461 del_timer(&vub300->sg_transfer_timer); 1462 if (vub300->sg_request.status < 0) { 1463 cmd->error = vub300->sg_request.status; 1464 data->bytes_xfered = 0; 1465 return 0; 1466 } else { 1467 data->bytes_xfered = vub300->datasize; 1468 return linear_length; 1469 } 1470 } 1471 } else { 1472 u8 *buf = kmalloc(padded_length, GFP_KERNEL); 1473 if (buf) { 1474 int result; 1475 unsigned pipe = usb_rcvbulkpipe(vub300->udev, 1476 vub300->data_inp_ep); 1477 int actual_length = 0; 1478 result = vub300_usb_bulk_msg(vub300, pipe, buf, 1479 padded_length, &actual_length, 1480 2000 + (padded_length / 16384)); 1481 if (result < 0) { 1482 cmd->error = result; 1483 data->bytes_xfered = 0; 1484 kfree(buf); 1485 return 0; 1486 } else if (actual_length < linear_length) { 1487 cmd->error = -EREMOTEIO; 1488 data->bytes_xfered = 0; 1489 kfree(buf); 1490 return 0; 1491 } else { 1492 sg_copy_from_buffer(data->sg, data->sg_len, buf, 1493 linear_length); 1494 kfree(buf); 1495 data->bytes_xfered = vub300->datasize; 1496 return linear_length; 1497 } 1498 } else { 1499 cmd->error = -ENOMEM; 1500 data->bytes_xfered = 0; 1501 return 0; 1502 } 1503 } 1504 } 1505 1506 static int __command_write_data(struct vub300_mmc_host *vub300, 1507 struct mmc_command *cmd, struct mmc_data *data) 1508 { 1509 /* cmd_mutex is held by vub300_cmndwork_thread */ 1510 unsigned pipe = usb_sndbulkpipe(vub300->udev, vub300->data_out_ep); 1511 int linear_length = vub300->datasize; 1512 int modulo_64_length = linear_length & 0x003F; 1513 int modulo_512_length = linear_length & 0x01FF; 1514 if (linear_length < 64) { 1515 int result; 1516 int actual_length; 1517 sg_copy_to_buffer(data->sg, data->sg_len, 1518 vub300->padded_buffer, 1519 sizeof(vub300->padded_buffer)); 1520 memset(vub300->padded_buffer + linear_length, 0, 1521 sizeof(vub300->padded_buffer) - linear_length); 1522 result = vub300_usb_bulk_msg(vub300, pipe, vub300->padded_buffer, 1523 sizeof(vub300->padded_buffer), 1524 &actual_length, 2000 + 1525 (sizeof(vub300->padded_buffer) / 1526 16384)); 1527 if (result < 0) { 1528 cmd->error = result; 1529 data->bytes_xfered = 0; 1530 } else { 1531 data->bytes_xfered = vub300->datasize; 1532 } 1533 } else if ((!vub300->large_usb_packets && (0 < modulo_64_length)) || 1534 (vub300->large_usb_packets && (64 > modulo_512_length)) 1535 ) { /* don't you just love these work-rounds */ 1536 int padded_length = ((63 + linear_length) >> 6) << 6; 1537 u8 *buf = kmalloc(padded_length, GFP_KERNEL); 1538 if (buf) { 1539 int result; 1540 int actual_length; 1541 sg_copy_to_buffer(data->sg, data->sg_len, buf, 1542 padded_length); 1543 memset(buf + linear_length, 0, 1544 padded_length - linear_length); 1545 result = 1546 vub300_usb_bulk_msg(vub300, pipe, buf, 1547 padded_length, &actual_length, 1548 2000 + padded_length / 16384); 1549 kfree(buf); 1550 if (result < 0) { 1551 cmd->error = result; 1552 data->bytes_xfered = 0; 1553 } else { 1554 data->bytes_xfered = vub300->datasize; 1555 } 1556 } else { 1557 cmd->error = -ENOMEM; 1558 data->bytes_xfered = 0; 1559 } 1560 } else { /* no data padding required */ 1561 int result; 1562 unsigned char buf[64 * 4]; 1563 sg_copy_to_buffer(data->sg, data->sg_len, buf, sizeof(buf)); 1564 result = usb_sg_init(&vub300->sg_request, vub300->udev, 1565 pipe, 0, data->sg, 1566 data->sg_len, 0, GFP_KERNEL); 1567 if (result < 0) { 1568 usb_unlink_urb(vub300->command_out_urb); 1569 usb_unlink_urb(vub300->command_res_urb); 1570 cmd->error = result; 1571 data->bytes_xfered = 0; 1572 } else { 1573 vub300->sg_transfer_timer.expires = 1574 jiffies + msecs_to_jiffies(2000 + 1575 linear_length / 16384); 1576 add_timer(&vub300->sg_transfer_timer); 1577 usb_sg_wait(&vub300->sg_request); 1578 if (cmd->error) { 1579 data->bytes_xfered = 0; 1580 } else { 1581 del_timer(&vub300->sg_transfer_timer); 1582 if (vub300->sg_request.status < 0) { 1583 cmd->error = vub300->sg_request.status; 1584 data->bytes_xfered = 0; 1585 } else { 1586 data->bytes_xfered = vub300->datasize; 1587 } 1588 } 1589 } 1590 } 1591 return linear_length; 1592 } 1593 1594 static void __vub300_command_response(struct vub300_mmc_host *vub300, 1595 struct mmc_command *cmd, 1596 struct mmc_data *data, int data_length) 1597 { 1598 /* cmd_mutex is held by vub300_cmndwork_thread */ 1599 long respretval; 1600 int msec_timeout = 1000 + data_length / 4; 1601 respretval = 1602 wait_for_completion_timeout(&vub300->command_complete, 1603 msecs_to_jiffies(msec_timeout)); 1604 if (respretval == 0) { /* TIMED OUT */ 1605 /* we don't know which of "out" and "res" if any failed */ 1606 int result; 1607 vub300->usb_timed_out = 1; 1608 usb_kill_urb(vub300->command_out_urb); 1609 usb_kill_urb(vub300->command_res_urb); 1610 cmd->error = -ETIMEDOUT; 1611 result = usb_lock_device_for_reset(vub300->udev, 1612 vub300->interface); 1613 if (result == 0) { 1614 result = usb_reset_device(vub300->udev); 1615 usb_unlock_device(vub300->udev); 1616 } 1617 } else if (respretval < 0) { 1618 /* we don't know which of "out" and "res" if any failed */ 1619 usb_kill_urb(vub300->command_out_urb); 1620 usb_kill_urb(vub300->command_res_urb); 1621 cmd->error = respretval; 1622 } else if (cmd->error) { 1623 /* 1624 * the error occurred sending the command 1625 * or receiving the response 1626 */ 1627 } else if (vub300->command_out_urb->status) { 1628 vub300->usb_transport_fail = vub300->command_out_urb->status; 1629 cmd->error = -EPROTO == vub300->command_out_urb->status ? 1630 -ESHUTDOWN : vub300->command_out_urb->status; 1631 } else if (vub300->command_res_urb->status) { 1632 vub300->usb_transport_fail = vub300->command_res_urb->status; 1633 cmd->error = -EPROTO == vub300->command_res_urb->status ? 1634 -ESHUTDOWN : vub300->command_res_urb->status; 1635 } else if (vub300->resp.common.header_type == 0x00) { 1636 /* 1637 * the command completed successfully 1638 * and there was no piggybacked data 1639 */ 1640 } else if (vub300->resp.common.header_type == RESPONSE_ERROR) { 1641 cmd->error = 1642 vub300_response_error(vub300->resp.error.error_code); 1643 if (vub300->data) 1644 usb_sg_cancel(&vub300->sg_request); 1645 } else if (vub300->resp.common.header_type == RESPONSE_PIGGYBACKED) { 1646 int offloaded_data_length = 1647 vub300->resp.common.header_size - 1648 sizeof(struct sd_register_header); 1649 int register_count = offloaded_data_length >> 3; 1650 int ri = 0; 1651 while (register_count--) { 1652 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]); 1653 ri += 1; 1654 } 1655 vub300->resp.common.header_size = 1656 sizeof(struct sd_register_header); 1657 vub300->resp.common.header_type = 0x00; 1658 cmd->error = 0; 1659 } else if (vub300->resp.common.header_type == RESPONSE_PIG_DISABLED) { 1660 int offloaded_data_length = 1661 vub300->resp.common.header_size - 1662 sizeof(struct sd_register_header); 1663 int register_count = offloaded_data_length >> 3; 1664 int ri = 0; 1665 while (register_count--) { 1666 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]); 1667 ri += 1; 1668 } 1669 mutex_lock(&vub300->irq_mutex); 1670 if (vub300->irqs_queued) { 1671 vub300->irqs_queued += 1; 1672 } else if (vub300->irq_enabled) { 1673 vub300->irqs_queued += 1; 1674 vub300_queue_poll_work(vub300, 0); 1675 } else { 1676 vub300->irqs_queued += 1; 1677 } 1678 vub300->irq_disabled = 1; 1679 mutex_unlock(&vub300->irq_mutex); 1680 vub300->resp.common.header_size = 1681 sizeof(struct sd_register_header); 1682 vub300->resp.common.header_type = 0x00; 1683 cmd->error = 0; 1684 } else if (vub300->resp.common.header_type == RESPONSE_PIG_ENABLED) { 1685 int offloaded_data_length = 1686 vub300->resp.common.header_size - 1687 sizeof(struct sd_register_header); 1688 int register_count = offloaded_data_length >> 3; 1689 int ri = 0; 1690 while (register_count--) { 1691 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]); 1692 ri += 1; 1693 } 1694 mutex_lock(&vub300->irq_mutex); 1695 if (vub300->irqs_queued) { 1696 vub300->irqs_queued += 1; 1697 } else if (vub300->irq_enabled) { 1698 vub300->irqs_queued += 1; 1699 vub300_queue_poll_work(vub300, 0); 1700 } else { 1701 vub300->irqs_queued += 1; 1702 } 1703 vub300->irq_disabled = 0; 1704 mutex_unlock(&vub300->irq_mutex); 1705 vub300->resp.common.header_size = 1706 sizeof(struct sd_register_header); 1707 vub300->resp.common.header_type = 0x00; 1708 cmd->error = 0; 1709 } else { 1710 cmd->error = -EINVAL; 1711 } 1712 } 1713 1714 static void construct_request_response(struct vub300_mmc_host *vub300, 1715 struct mmc_command *cmd) 1716 { 1717 int resp_len = vub300->resp_len; 1718 int less_cmd = (17 == resp_len) ? resp_len : resp_len - 1; 1719 int bytes = 3 & less_cmd; 1720 int words = less_cmd >> 2; 1721 u8 *r = vub300->resp.response.command_response; 1722 if (bytes == 3) { 1723 cmd->resp[words] = (r[1 + (words << 2)] << 24) 1724 | (r[2 + (words << 2)] << 16) 1725 | (r[3 + (words << 2)] << 8); 1726 } else if (bytes == 2) { 1727 cmd->resp[words] = (r[1 + (words << 2)] << 24) 1728 | (r[2 + (words << 2)] << 16); 1729 } else if (bytes == 1) { 1730 cmd->resp[words] = (r[1 + (words << 2)] << 24); 1731 } 1732 while (words-- > 0) { 1733 cmd->resp[words] = (r[1 + (words << 2)] << 24) 1734 | (r[2 + (words << 2)] << 16) 1735 | (r[3 + (words << 2)] << 8) 1736 | (r[4 + (words << 2)] << 0); 1737 } 1738 if ((cmd->opcode == 53) && (0x000000FF & cmd->resp[0])) 1739 cmd->resp[0] &= 0xFFFFFF00; 1740 } 1741 1742 /* this thread runs only when there is an upper level command req outstanding */ 1743 static void vub300_cmndwork_thread(struct work_struct *work) 1744 { 1745 struct vub300_mmc_host *vub300 = 1746 container_of(work, struct vub300_mmc_host, cmndwork); 1747 if (!vub300->interface) { 1748 kref_put(&vub300->kref, vub300_delete); 1749 return; 1750 } else { 1751 struct mmc_request *req = vub300->req; 1752 struct mmc_command *cmd = vub300->cmd; 1753 struct mmc_data *data = vub300->data; 1754 int data_length; 1755 mutex_lock(&vub300->cmd_mutex); 1756 init_completion(&vub300->command_complete); 1757 if (likely(vub300->vub_name[0]) || !vub300->mmc->card || 1758 !mmc_card_present(vub300->mmc->card)) { 1759 /* 1760 * the name of the EMPTY Pseudo firmware file 1761 * is used as a flag to indicate that the file 1762 * has been already downloaded to the VUB300 chip 1763 */ 1764 } else if (0 == vub300->mmc->card->sdio_funcs) { 1765 strncpy(vub300->vub_name, "SD memory device", 1766 sizeof(vub300->vub_name)); 1767 } else { 1768 download_offload_pseudocode(vub300); 1769 } 1770 send_command(vub300); 1771 if (!data) 1772 data_length = 0; 1773 else if (MMC_DATA_READ & data->flags) 1774 data_length = __command_read_data(vub300, cmd, data); 1775 else 1776 data_length = __command_write_data(vub300, cmd, data); 1777 __vub300_command_response(vub300, cmd, data, data_length); 1778 vub300->req = NULL; 1779 vub300->cmd = NULL; 1780 vub300->data = NULL; 1781 if (cmd->error) { 1782 if (cmd->error == -ENOMEDIUM) 1783 check_vub300_port_status(vub300); 1784 mutex_unlock(&vub300->cmd_mutex); 1785 mmc_request_done(vub300->mmc, req); 1786 kref_put(&vub300->kref, vub300_delete); 1787 return; 1788 } else { 1789 construct_request_response(vub300, cmd); 1790 vub300->resp_len = 0; 1791 mutex_unlock(&vub300->cmd_mutex); 1792 kref_put(&vub300->kref, vub300_delete); 1793 mmc_request_done(vub300->mmc, req); 1794 return; 1795 } 1796 } 1797 } 1798 1799 static int examine_cyclic_buffer(struct vub300_mmc_host *vub300, 1800 struct mmc_command *cmd, u8 Function) 1801 { 1802 /* cmd_mutex is held by vub300_mmc_request */ 1803 u8 cmd0 = 0xFF & (cmd->arg >> 24); 1804 u8 cmd1 = 0xFF & (cmd->arg >> 16); 1805 u8 cmd2 = 0xFF & (cmd->arg >> 8); 1806 u8 cmd3 = 0xFF & (cmd->arg >> 0); 1807 int first = MAXREGMASK & vub300->fn[Function].offload_point; 1808 struct offload_registers_access *rf = &vub300->fn[Function].reg[first]; 1809 if (cmd0 == rf->command_byte[0] && 1810 cmd1 == rf->command_byte[1] && 1811 cmd2 == rf->command_byte[2] && 1812 cmd3 == rf->command_byte[3]) { 1813 u8 checksum = 0x00; 1814 cmd->resp[1] = checksum << 24; 1815 cmd->resp[0] = (rf->Respond_Byte[0] << 24) 1816 | (rf->Respond_Byte[1] << 16) 1817 | (rf->Respond_Byte[2] << 8) 1818 | (rf->Respond_Byte[3] << 0); 1819 vub300->fn[Function].offload_point += 1; 1820 vub300->fn[Function].offload_count -= 1; 1821 vub300->total_offload_count -= 1; 1822 return 1; 1823 } else { 1824 int delta = 1; /* because it does not match the first one */ 1825 u8 register_count = vub300->fn[Function].offload_count - 1; 1826 u32 register_point = vub300->fn[Function].offload_point + 1; 1827 while (0 < register_count) { 1828 int point = MAXREGMASK & register_point; 1829 struct offload_registers_access *r = 1830 &vub300->fn[Function].reg[point]; 1831 if (cmd0 == r->command_byte[0] && 1832 cmd1 == r->command_byte[1] && 1833 cmd2 == r->command_byte[2] && 1834 cmd3 == r->command_byte[3]) { 1835 u8 checksum = 0x00; 1836 cmd->resp[1] = checksum << 24; 1837 cmd->resp[0] = (r->Respond_Byte[0] << 24) 1838 | (r->Respond_Byte[1] << 16) 1839 | (r->Respond_Byte[2] << 8) 1840 | (r->Respond_Byte[3] << 0); 1841 vub300->fn[Function].offload_point += delta; 1842 vub300->fn[Function].offload_count -= delta; 1843 vub300->total_offload_count -= delta; 1844 return 1; 1845 } else { 1846 register_point += 1; 1847 register_count -= 1; 1848 delta += 1; 1849 continue; 1850 } 1851 } 1852 return 0; 1853 } 1854 } 1855 1856 static int satisfy_request_from_offloaded_data(struct vub300_mmc_host *vub300, 1857 struct mmc_command *cmd) 1858 { 1859 /* cmd_mutex is held by vub300_mmc_request */ 1860 u8 regs = vub300->dynamic_register_count; 1861 u8 i = 0; 1862 u8 func = FUN(cmd); 1863 u32 reg = REG(cmd); 1864 while (0 < regs--) { 1865 if ((vub300->sdio_register[i].func_num == func) && 1866 (vub300->sdio_register[i].sdio_reg == reg)) { 1867 if (!vub300->sdio_register[i].prepared) { 1868 return 0; 1869 } else if ((0x80000000 & cmd->arg) == 0x80000000) { 1870 /* 1871 * a write to a dynamic register 1872 * nullifies our offloaded value 1873 */ 1874 vub300->sdio_register[i].prepared = 0; 1875 return 0; 1876 } else { 1877 u8 checksum = 0x00; 1878 u8 rsp0 = 0x00; 1879 u8 rsp1 = 0x00; 1880 u8 rsp2 = vub300->sdio_register[i].response; 1881 u8 rsp3 = vub300->sdio_register[i].regvalue; 1882 vub300->sdio_register[i].prepared = 0; 1883 cmd->resp[1] = checksum << 24; 1884 cmd->resp[0] = (rsp0 << 24) 1885 | (rsp1 << 16) 1886 | (rsp2 << 8) 1887 | (rsp3 << 0); 1888 return 1; 1889 } 1890 } else { 1891 i += 1; 1892 continue; 1893 } 1894 } 1895 if (vub300->total_offload_count == 0) 1896 return 0; 1897 else if (vub300->fn[func].offload_count == 0) 1898 return 0; 1899 else 1900 return examine_cyclic_buffer(vub300, cmd, func); 1901 } 1902 1903 static void vub300_mmc_request(struct mmc_host *mmc, struct mmc_request *req) 1904 { /* NOT irq */ 1905 struct mmc_command *cmd = req->cmd; 1906 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 1907 if (!vub300->interface) { 1908 cmd->error = -ESHUTDOWN; 1909 mmc_request_done(mmc, req); 1910 return; 1911 } else { 1912 struct mmc_data *data = req->data; 1913 if (!vub300->card_powered) { 1914 cmd->error = -ENOMEDIUM; 1915 mmc_request_done(mmc, req); 1916 return; 1917 } 1918 if (!vub300->card_present) { 1919 cmd->error = -ENOMEDIUM; 1920 mmc_request_done(mmc, req); 1921 return; 1922 } 1923 if (vub300->usb_transport_fail) { 1924 cmd->error = vub300->usb_transport_fail; 1925 mmc_request_done(mmc, req); 1926 return; 1927 } 1928 if (!vub300->interface) { 1929 cmd->error = -ENODEV; 1930 mmc_request_done(mmc, req); 1931 return; 1932 } 1933 kref_get(&vub300->kref); 1934 mutex_lock(&vub300->cmd_mutex); 1935 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 1936 /* 1937 * for performance we have to return immediately 1938 * if the requested data has been offloaded 1939 */ 1940 if (cmd->opcode == 52 && 1941 satisfy_request_from_offloaded_data(vub300, cmd)) { 1942 cmd->error = 0; 1943 mutex_unlock(&vub300->cmd_mutex); 1944 kref_put(&vub300->kref, vub300_delete); 1945 mmc_request_done(mmc, req); 1946 return; 1947 } else { 1948 vub300->cmd = cmd; 1949 vub300->req = req; 1950 vub300->data = data; 1951 if (data) 1952 vub300->datasize = data->blksz * data->blocks; 1953 else 1954 vub300->datasize = 0; 1955 vub300_queue_cmnd_work(vub300); 1956 mutex_unlock(&vub300->cmd_mutex); 1957 kref_put(&vub300->kref, vub300_delete); 1958 /* 1959 * the kernel lock diagnostics complain 1960 * if the cmd_mutex * is "passed on" 1961 * to the cmndwork thread, 1962 * so we must release it now 1963 * and re-acquire it in the cmndwork thread 1964 */ 1965 } 1966 } 1967 } 1968 1969 static void __set_clock_speed(struct vub300_mmc_host *vub300, u8 buf[8], 1970 struct mmc_ios *ios) 1971 { 1972 int buf_array_size = 8; /* ARRAY_SIZE(buf) does not work !!! */ 1973 int retval; 1974 u32 kHzClock; 1975 if (ios->clock >= 48000000) 1976 kHzClock = 48000; 1977 else if (ios->clock >= 24000000) 1978 kHzClock = 24000; 1979 else if (ios->clock >= 20000000) 1980 kHzClock = 20000; 1981 else if (ios->clock >= 15000000) 1982 kHzClock = 15000; 1983 else if (ios->clock >= 200000) 1984 kHzClock = 200; 1985 else 1986 kHzClock = 0; 1987 { 1988 int i; 1989 u64 c = kHzClock; 1990 for (i = 0; i < buf_array_size; i++) { 1991 buf[i] = c; 1992 c >>= 8; 1993 } 1994 } 1995 retval = 1996 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0), 1997 SET_CLOCK_SPEED, 1998 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 1999 0x00, 0x00, buf, buf_array_size, HZ); 2000 if (retval != 8) { 2001 dev_err(&vub300->udev->dev, "SET_CLOCK_SPEED" 2002 " %dkHz failed with retval=%d\n", kHzClock, retval); 2003 } else { 2004 dev_dbg(&vub300->udev->dev, "SET_CLOCK_SPEED" 2005 " %dkHz\n", kHzClock); 2006 } 2007 } 2008 2009 static void vub300_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 2010 { /* NOT irq */ 2011 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 2012 if (!vub300->interface) 2013 return; 2014 kref_get(&vub300->kref); 2015 mutex_lock(&vub300->cmd_mutex); 2016 if ((ios->power_mode == MMC_POWER_OFF) && vub300->card_powered) { 2017 vub300->card_powered = 0; 2018 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0), 2019 SET_SD_POWER, 2020 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2021 0x0000, 0x0000, NULL, 0, HZ); 2022 /* must wait for the VUB300 u-proc to boot up */ 2023 msleep(600); 2024 } else if ((ios->power_mode == MMC_POWER_UP) && !vub300->card_powered) { 2025 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0), 2026 SET_SD_POWER, 2027 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2028 0x0001, 0x0000, NULL, 0, HZ); 2029 msleep(600); 2030 vub300->card_powered = 1; 2031 } else if (ios->power_mode == MMC_POWER_ON) { 2032 u8 *buf = kmalloc(8, GFP_KERNEL); 2033 if (buf) { 2034 __set_clock_speed(vub300, buf, ios); 2035 kfree(buf); 2036 } 2037 } else { 2038 /* this should mean no change of state */ 2039 } 2040 mutex_unlock(&vub300->cmd_mutex); 2041 kref_put(&vub300->kref, vub300_delete); 2042 } 2043 2044 static int vub300_mmc_get_ro(struct mmc_host *mmc) 2045 { 2046 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 2047 return vub300->read_only; 2048 } 2049 2050 static void vub300_enable_sdio_irq(struct mmc_host *mmc, int enable) 2051 { /* NOT irq */ 2052 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 2053 if (!vub300->interface) 2054 return; 2055 kref_get(&vub300->kref); 2056 if (enable) { 2057 mutex_lock(&vub300->irq_mutex); 2058 if (vub300->irqs_queued) { 2059 vub300->irqs_queued -= 1; 2060 mmc_signal_sdio_irq(vub300->mmc); 2061 } else if (vub300->irq_disabled) { 2062 vub300->irq_disabled = 0; 2063 vub300->irq_enabled = 1; 2064 vub300_queue_poll_work(vub300, 0); 2065 } else if (vub300->irq_enabled) { 2066 /* this should not happen, so we will just ignore it */ 2067 } else { 2068 vub300->irq_enabled = 1; 2069 vub300_queue_poll_work(vub300, 0); 2070 } 2071 mutex_unlock(&vub300->irq_mutex); 2072 } else { 2073 vub300->irq_enabled = 0; 2074 } 2075 kref_put(&vub300->kref, vub300_delete); 2076 } 2077 2078 static void vub300_init_card(struct mmc_host *mmc, struct mmc_card *card) 2079 { /* NOT irq */ 2080 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 2081 dev_info(&vub300->udev->dev, "NO host QUIRKS for this card\n"); 2082 } 2083 2084 static struct mmc_host_ops vub300_mmc_ops = { 2085 .request = vub300_mmc_request, 2086 .set_ios = vub300_mmc_set_ios, 2087 .get_ro = vub300_mmc_get_ro, 2088 .enable_sdio_irq = vub300_enable_sdio_irq, 2089 .init_card = vub300_init_card, 2090 }; 2091 2092 static int vub300_probe(struct usb_interface *interface, 2093 const struct usb_device_id *id) 2094 { /* NOT irq */ 2095 struct vub300_mmc_host *vub300; 2096 struct usb_host_interface *iface_desc; 2097 struct usb_device *udev = usb_get_dev(interface_to_usbdev(interface)); 2098 int i; 2099 int retval = -ENOMEM; 2100 struct urb *command_out_urb; 2101 struct urb *command_res_urb; 2102 struct mmc_host *mmc; 2103 char manufacturer[48]; 2104 char product[32]; 2105 char serial_number[32]; 2106 usb_string(udev, udev->descriptor.iManufacturer, manufacturer, 2107 sizeof(manufacturer)); 2108 usb_string(udev, udev->descriptor.iProduct, product, sizeof(product)); 2109 usb_string(udev, udev->descriptor.iSerialNumber, serial_number, 2110 sizeof(serial_number)); 2111 dev_info(&udev->dev, "probing VID:PID(%04X:%04X) %s %s %s\n", 2112 udev->descriptor.idVendor, udev->descriptor.idProduct, 2113 manufacturer, product, serial_number); 2114 command_out_urb = usb_alloc_urb(0, GFP_KERNEL); 2115 if (!command_out_urb) { 2116 retval = -ENOMEM; 2117 goto error0; 2118 } 2119 command_res_urb = usb_alloc_urb(0, GFP_KERNEL); 2120 if (!command_res_urb) { 2121 retval = -ENOMEM; 2122 goto error1; 2123 } 2124 /* this also allocates memory for our VUB300 mmc host device */ 2125 mmc = mmc_alloc_host(sizeof(struct vub300_mmc_host), &udev->dev); 2126 if (!mmc) { 2127 retval = -ENOMEM; 2128 dev_err(&udev->dev, "not enough memory for the mmc_host\n"); 2129 goto error4; 2130 } 2131 /* MMC core transfer sizes tunable parameters */ 2132 mmc->caps = 0; 2133 if (!force_1_bit_data_xfers) 2134 mmc->caps |= MMC_CAP_4_BIT_DATA; 2135 if (!force_polling_for_irqs) 2136 mmc->caps |= MMC_CAP_SDIO_IRQ; 2137 mmc->caps &= ~MMC_CAP_NEEDS_POLL; 2138 /* 2139 * MMC_CAP_NEEDS_POLL causes core.c:mmc_rescan() to poll 2140 * for devices which results in spurious CMD7's being 2141 * issued which stops some SDIO cards from working 2142 */ 2143 if (limit_speed_to_24_MHz) { 2144 mmc->caps |= MMC_CAP_MMC_HIGHSPEED; 2145 mmc->caps |= MMC_CAP_SD_HIGHSPEED; 2146 mmc->f_max = 24000000; 2147 dev_info(&udev->dev, "limiting SDIO speed to 24_MHz\n"); 2148 } else { 2149 mmc->caps |= MMC_CAP_MMC_HIGHSPEED; 2150 mmc->caps |= MMC_CAP_SD_HIGHSPEED; 2151 mmc->f_max = 48000000; 2152 } 2153 mmc->f_min = 200000; 2154 mmc->max_blk_count = 511; 2155 mmc->max_blk_size = 512; 2156 mmc->max_segs = 128; 2157 if (force_max_req_size) 2158 mmc->max_req_size = force_max_req_size * 1024; 2159 else 2160 mmc->max_req_size = 64 * 1024; 2161 mmc->max_seg_size = mmc->max_req_size; 2162 mmc->ocr_avail = 0; 2163 mmc->ocr_avail |= MMC_VDD_165_195; 2164 mmc->ocr_avail |= MMC_VDD_20_21; 2165 mmc->ocr_avail |= MMC_VDD_21_22; 2166 mmc->ocr_avail |= MMC_VDD_22_23; 2167 mmc->ocr_avail |= MMC_VDD_23_24; 2168 mmc->ocr_avail |= MMC_VDD_24_25; 2169 mmc->ocr_avail |= MMC_VDD_25_26; 2170 mmc->ocr_avail |= MMC_VDD_26_27; 2171 mmc->ocr_avail |= MMC_VDD_27_28; 2172 mmc->ocr_avail |= MMC_VDD_28_29; 2173 mmc->ocr_avail |= MMC_VDD_29_30; 2174 mmc->ocr_avail |= MMC_VDD_30_31; 2175 mmc->ocr_avail |= MMC_VDD_31_32; 2176 mmc->ocr_avail |= MMC_VDD_32_33; 2177 mmc->ocr_avail |= MMC_VDD_33_34; 2178 mmc->ocr_avail |= MMC_VDD_34_35; 2179 mmc->ocr_avail |= MMC_VDD_35_36; 2180 mmc->ops = &vub300_mmc_ops; 2181 vub300 = mmc_priv(mmc); 2182 vub300->mmc = mmc; 2183 vub300->card_powered = 0; 2184 vub300->bus_width = 0; 2185 vub300->cmnd.head.block_size[0] = 0x00; 2186 vub300->cmnd.head.block_size[1] = 0x00; 2187 vub300->app_spec = 0; 2188 mutex_init(&vub300->cmd_mutex); 2189 mutex_init(&vub300->irq_mutex); 2190 vub300->command_out_urb = command_out_urb; 2191 vub300->command_res_urb = command_res_urb; 2192 vub300->usb_timed_out = 0; 2193 vub300->dynamic_register_count = 0; 2194 2195 for (i = 0; i < ARRAY_SIZE(vub300->fn); i++) { 2196 vub300->fn[i].offload_point = 0; 2197 vub300->fn[i].offload_count = 0; 2198 } 2199 2200 vub300->total_offload_count = 0; 2201 vub300->irq_enabled = 0; 2202 vub300->irq_disabled = 0; 2203 vub300->irqs_queued = 0; 2204 2205 for (i = 0; i < ARRAY_SIZE(vub300->sdio_register); i++) 2206 vub300->sdio_register[i++].activate = 0; 2207 2208 vub300->udev = udev; 2209 vub300->interface = interface; 2210 vub300->cmnd_res_ep = 0; 2211 vub300->cmnd_out_ep = 0; 2212 vub300->data_inp_ep = 0; 2213 vub300->data_out_ep = 0; 2214 2215 for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++) 2216 vub300->fbs[i] = 512; 2217 2218 /* 2219 * set up the endpoint information 2220 * 2221 * use the first pair of bulk-in and bulk-out 2222 * endpoints for Command/Response+Interrupt 2223 * 2224 * use the second pair of bulk-in and bulk-out 2225 * endpoints for Data In/Out 2226 */ 2227 vub300->large_usb_packets = 0; 2228 iface_desc = interface->cur_altsetting; 2229 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 2230 struct usb_endpoint_descriptor *endpoint = 2231 &iface_desc->endpoint[i].desc; 2232 dev_info(&vub300->udev->dev, 2233 "vub300 testing %s EndPoint(%d) %02X\n", 2234 usb_endpoint_is_bulk_in(endpoint) ? "BULK IN" : 2235 usb_endpoint_is_bulk_out(endpoint) ? "BULK OUT" : 2236 "UNKNOWN", i, endpoint->bEndpointAddress); 2237 if (endpoint->wMaxPacketSize > 64) 2238 vub300->large_usb_packets = 1; 2239 if (usb_endpoint_is_bulk_in(endpoint)) { 2240 if (!vub300->cmnd_res_ep) { 2241 vub300->cmnd_res_ep = 2242 endpoint->bEndpointAddress; 2243 } else if (!vub300->data_inp_ep) { 2244 vub300->data_inp_ep = 2245 endpoint->bEndpointAddress; 2246 } else { 2247 dev_warn(&vub300->udev->dev, 2248 "ignoring" 2249 " unexpected bulk_in endpoint"); 2250 } 2251 } else if (usb_endpoint_is_bulk_out(endpoint)) { 2252 if (!vub300->cmnd_out_ep) { 2253 vub300->cmnd_out_ep = 2254 endpoint->bEndpointAddress; 2255 } else if (!vub300->data_out_ep) { 2256 vub300->data_out_ep = 2257 endpoint->bEndpointAddress; 2258 } else { 2259 dev_warn(&vub300->udev->dev, 2260 "ignoring" 2261 " unexpected bulk_out endpoint"); 2262 } 2263 } else { 2264 dev_warn(&vub300->udev->dev, 2265 "vub300 ignoring EndPoint(%d) %02X", i, 2266 endpoint->bEndpointAddress); 2267 } 2268 } 2269 if (vub300->cmnd_res_ep && vub300->cmnd_out_ep && 2270 vub300->data_inp_ep && vub300->data_out_ep) { 2271 dev_info(&vub300->udev->dev, 2272 "vub300 %s packets" 2273 " using EndPoints %02X %02X %02X %02X\n", 2274 vub300->large_usb_packets ? "LARGE" : "SMALL", 2275 vub300->cmnd_out_ep, vub300->cmnd_res_ep, 2276 vub300->data_out_ep, vub300->data_inp_ep); 2277 /* we have the expected EndPoints */ 2278 } else { 2279 dev_err(&vub300->udev->dev, 2280 "Could not find two sets of bulk-in/out endpoint pairs\n"); 2281 retval = -EINVAL; 2282 goto error5; 2283 } 2284 retval = 2285 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0), 2286 GET_HC_INF0, 2287 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2288 0x0000, 0x0000, &vub300->hc_info, 2289 sizeof(vub300->hc_info), HZ); 2290 if (retval < 0) 2291 goto error5; 2292 retval = 2293 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0), 2294 SET_ROM_WAIT_STATES, 2295 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2296 firmware_rom_wait_states, 0x0000, NULL, 0, HZ); 2297 if (retval < 0) 2298 goto error5; 2299 dev_info(&vub300->udev->dev, 2300 "operating_mode = %s %s %d MHz %s %d byte USB packets\n", 2301 (mmc->caps & MMC_CAP_SDIO_IRQ) ? "IRQs" : "POLL", 2302 (mmc->caps & MMC_CAP_4_BIT_DATA) ? "4-bit" : "1-bit", 2303 mmc->f_max / 1000000, 2304 pad_input_to_usb_pkt ? "padding input data to" : "with", 2305 vub300->large_usb_packets ? 512 : 64); 2306 retval = 2307 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0), 2308 GET_SYSTEM_PORT_STATUS, 2309 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2310 0x0000, 0x0000, &vub300->system_port_status, 2311 sizeof(vub300->system_port_status), HZ); 2312 if (retval < 0) { 2313 goto error4; 2314 } else if (sizeof(vub300->system_port_status) == retval) { 2315 vub300->card_present = 2316 (0x0001 & vub300->system_port_status.port_flags) ? 1 : 0; 2317 vub300->read_only = 2318 (0x0010 & vub300->system_port_status.port_flags) ? 1 : 0; 2319 } else { 2320 goto error4; 2321 } 2322 usb_set_intfdata(interface, vub300); 2323 INIT_DELAYED_WORK(&vub300->pollwork, vub300_pollwork_thread); 2324 INIT_WORK(&vub300->cmndwork, vub300_cmndwork_thread); 2325 INIT_WORK(&vub300->deadwork, vub300_deadwork_thread); 2326 kref_init(&vub300->kref); 2327 init_timer(&vub300->sg_transfer_timer); 2328 vub300->sg_transfer_timer.data = (unsigned long)vub300; 2329 vub300->sg_transfer_timer.function = vub300_sg_timed_out; 2330 kref_get(&vub300->kref); 2331 init_timer(&vub300->inactivity_timer); 2332 vub300->inactivity_timer.data = (unsigned long)vub300; 2333 vub300->inactivity_timer.function = vub300_inactivity_timer_expired; 2334 vub300->inactivity_timer.expires = jiffies + HZ; 2335 add_timer(&vub300->inactivity_timer); 2336 if (vub300->card_present) 2337 dev_info(&vub300->udev->dev, 2338 "USB vub300 remote SDIO host controller[%d]" 2339 "connected with SD/SDIO card inserted\n", 2340 interface_to_InterfaceNumber(interface)); 2341 else 2342 dev_info(&vub300->udev->dev, 2343 "USB vub300 remote SDIO host controller[%d]" 2344 "connected with no SD/SDIO card inserted\n", 2345 interface_to_InterfaceNumber(interface)); 2346 mmc_add_host(mmc); 2347 return 0; 2348 error5: 2349 mmc_free_host(mmc); 2350 /* 2351 * and hence also frees vub300 2352 * which is contained at the end of struct mmc 2353 */ 2354 error4: 2355 usb_free_urb(command_res_urb); 2356 error1: 2357 usb_free_urb(command_out_urb); 2358 error0: 2359 usb_put_dev(udev); 2360 return retval; 2361 } 2362 2363 static void vub300_disconnect(struct usb_interface *interface) 2364 { /* NOT irq */ 2365 struct vub300_mmc_host *vub300 = usb_get_intfdata(interface); 2366 if (!vub300 || !vub300->mmc) { 2367 return; 2368 } else { 2369 struct mmc_host *mmc = vub300->mmc; 2370 if (!vub300->mmc) { 2371 return; 2372 } else { 2373 int ifnum = interface_to_InterfaceNumber(interface); 2374 usb_set_intfdata(interface, NULL); 2375 /* prevent more I/O from starting */ 2376 vub300->interface = NULL; 2377 kref_put(&vub300->kref, vub300_delete); 2378 mmc_remove_host(mmc); 2379 pr_info("USB vub300 remote SDIO host controller[%d]" 2380 " now disconnected", ifnum); 2381 return; 2382 } 2383 } 2384 } 2385 2386 #ifdef CONFIG_PM 2387 static int vub300_suspend(struct usb_interface *intf, pm_message_t message) 2388 { 2389 return 0; 2390 } 2391 2392 static int vub300_resume(struct usb_interface *intf) 2393 { 2394 return 0; 2395 } 2396 #else 2397 #define vub300_suspend NULL 2398 #define vub300_resume NULL 2399 #endif 2400 static int vub300_pre_reset(struct usb_interface *intf) 2401 { /* NOT irq */ 2402 struct vub300_mmc_host *vub300 = usb_get_intfdata(intf); 2403 mutex_lock(&vub300->cmd_mutex); 2404 return 0; 2405 } 2406 2407 static int vub300_post_reset(struct usb_interface *intf) 2408 { /* NOT irq */ 2409 struct vub300_mmc_host *vub300 = usb_get_intfdata(intf); 2410 /* we are sure no URBs are active - no locking needed */ 2411 vub300->errors = -EPIPE; 2412 mutex_unlock(&vub300->cmd_mutex); 2413 return 0; 2414 } 2415 2416 static struct usb_driver vub300_driver = { 2417 .name = "vub300", 2418 .probe = vub300_probe, 2419 .disconnect = vub300_disconnect, 2420 .suspend = vub300_suspend, 2421 .resume = vub300_resume, 2422 .pre_reset = vub300_pre_reset, 2423 .post_reset = vub300_post_reset, 2424 .id_table = vub300_table, 2425 .supports_autosuspend = 1, 2426 }; 2427 2428 static int __init vub300_init(void) 2429 { /* NOT irq */ 2430 int result; 2431 2432 pr_info("VUB300 Driver rom wait states = %02X irqpoll timeout = %04X", 2433 firmware_rom_wait_states, 0x0FFFF & firmware_irqpoll_timeout); 2434 cmndworkqueue = create_singlethread_workqueue("kvub300c"); 2435 if (!cmndworkqueue) { 2436 pr_err("not enough memory for the REQUEST workqueue"); 2437 result = -ENOMEM; 2438 goto out1; 2439 } 2440 pollworkqueue = create_singlethread_workqueue("kvub300p"); 2441 if (!pollworkqueue) { 2442 pr_err("not enough memory for the IRQPOLL workqueue"); 2443 result = -ENOMEM; 2444 goto out2; 2445 } 2446 deadworkqueue = create_singlethread_workqueue("kvub300d"); 2447 if (!deadworkqueue) { 2448 pr_err("not enough memory for the EXPIRED workqueue"); 2449 result = -ENOMEM; 2450 goto out3; 2451 } 2452 result = usb_register(&vub300_driver); 2453 if (result) { 2454 pr_err("usb_register failed. Error number %d", result); 2455 goto out4; 2456 } 2457 return 0; 2458 out4: 2459 destroy_workqueue(deadworkqueue); 2460 out3: 2461 destroy_workqueue(pollworkqueue); 2462 out2: 2463 destroy_workqueue(cmndworkqueue); 2464 out1: 2465 return result; 2466 } 2467 2468 static void __exit vub300_exit(void) 2469 { 2470 usb_deregister(&vub300_driver); 2471 flush_workqueue(cmndworkqueue); 2472 flush_workqueue(pollworkqueue); 2473 flush_workqueue(deadworkqueue); 2474 destroy_workqueue(cmndworkqueue); 2475 destroy_workqueue(pollworkqueue); 2476 destroy_workqueue(deadworkqueue); 2477 } 2478 2479 module_init(vub300_init); 2480 module_exit(vub300_exit); 2481 2482 MODULE_AUTHOR("Tony Olech <tony.olech@elandigitalsystems.com>"); 2483 MODULE_DESCRIPTION("VUB300 USB to SD/MMC/SDIO adapter driver"); 2484 MODULE_LICENSE("GPL"); 2485