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 unsigned 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 { /* commretval > 0 */ 675 __vub300_irqpoll_response(vub300); 676 } 677 } 678 679 /* this thread runs only when the driver 680 * is trying to poll the device for an IRQ 681 */ 682 static void vub300_pollwork_thread(struct work_struct *work) 683 { /* NOT irq */ 684 struct vub300_mmc_host *vub300 = container_of(work, 685 struct vub300_mmc_host, pollwork.work); 686 if (!vub300->interface) { 687 kref_put(&vub300->kref, vub300_delete); 688 return; 689 } 690 mutex_lock(&vub300->cmd_mutex); 691 if (vub300->cmd) { 692 vub300_queue_poll_work(vub300, 1); 693 } else if (!vub300->card_present) { 694 /* no need to do anything */ 695 } else { /* vub300->card_present */ 696 mutex_lock(&vub300->irq_mutex); 697 if (!vub300->irq_enabled) { 698 mutex_unlock(&vub300->irq_mutex); 699 } else if (vub300->irqs_queued) { 700 vub300->irqs_queued -= 1; 701 mmc_signal_sdio_irq(vub300->mmc); 702 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 703 mutex_unlock(&vub300->irq_mutex); 704 } else { /* NOT vub300->irqs_queued */ 705 mutex_unlock(&vub300->irq_mutex); 706 __do_poll(vub300); 707 } 708 } 709 mutex_unlock(&vub300->cmd_mutex); 710 kref_put(&vub300->kref, vub300_delete); 711 } 712 713 static void vub300_deadwork_thread(struct work_struct *work) 714 { /* NOT irq */ 715 struct vub300_mmc_host *vub300 = 716 container_of(work, struct vub300_mmc_host, deadwork); 717 if (!vub300->interface) { 718 kref_put(&vub300->kref, vub300_delete); 719 return; 720 } 721 mutex_lock(&vub300->cmd_mutex); 722 if (vub300->cmd) { 723 /* 724 * a command got in as the inactivity 725 * timer expired - so we just let the 726 * processing of the command show if 727 * the device is dead 728 */ 729 } else if (vub300->card_present) { 730 check_vub300_port_status(vub300); 731 } else if (vub300->mmc && vub300->mmc->card && 732 mmc_card_present(vub300->mmc->card)) { 733 /* 734 * the MMC core must not have responded 735 * to the previous indication - lets 736 * hope that it eventually does so we 737 * will just ignore this for now 738 */ 739 } else { 740 check_vub300_port_status(vub300); 741 } 742 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 743 mutex_unlock(&vub300->cmd_mutex); 744 kref_put(&vub300->kref, vub300_delete); 745 } 746 747 static void vub300_inactivity_timer_expired(unsigned long data) 748 { /* softirq */ 749 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)data; 750 if (!vub300->interface) { 751 kref_put(&vub300->kref, vub300_delete); 752 } else if (vub300->cmd) { 753 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 754 } else { 755 vub300_queue_dead_work(vub300); 756 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 757 } 758 } 759 760 static int vub300_response_error(u8 error_code) 761 { 762 switch (error_code) { 763 case SD_ERROR_PIO_TIMEOUT: 764 case SD_ERROR_1BIT_TIMEOUT: 765 case SD_ERROR_4BIT_TIMEOUT: 766 return -ETIMEDOUT; 767 case SD_ERROR_STAT_DATA: 768 case SD_ERROR_OVERRUN: 769 case SD_ERROR_STAT_CMD: 770 case SD_ERROR_STAT_CMD_TIMEOUT: 771 case SD_ERROR_SDCRDY_STUCK: 772 case SD_ERROR_UNHANDLED: 773 case SD_ERROR_1BIT_CRC_WRONG: 774 case SD_ERROR_4BIT_CRC_WRONG: 775 case SD_ERROR_1BIT_CRC_ERROR: 776 case SD_ERROR_4BIT_CRC_ERROR: 777 case SD_ERROR_NO_CMD_ENDBIT: 778 case SD_ERROR_NO_1BIT_DATEND: 779 case SD_ERROR_NO_4BIT_DATEND: 780 case SD_ERROR_1BIT_DATA_TIMEOUT: 781 case SD_ERROR_4BIT_DATA_TIMEOUT: 782 case SD_ERROR_1BIT_UNEXPECTED_TIMEOUT: 783 case SD_ERROR_4BIT_UNEXPECTED_TIMEOUT: 784 return -EILSEQ; 785 case 33: 786 return -EILSEQ; 787 case SD_ERROR_ILLEGAL_COMMAND: 788 return -EINVAL; 789 case SD_ERROR_NO_DEVICE: 790 return -ENOMEDIUM; 791 default: 792 return -ENODEV; 793 } 794 } 795 796 static void command_res_completed(struct urb *urb) 797 { /* urb completion handler - hardirq */ 798 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context; 799 if (urb->status) { 800 /* we have to let the initiator handle the error */ 801 } else if (vub300->command_res_urb->actual_length == 0) { 802 /* 803 * we have seen this happen once or twice and 804 * we suspect a buggy USB host controller 805 */ 806 } else if (!vub300->data) { 807 /* this means that the command (typically CMD52) succeeded */ 808 } else if (vub300->resp.common.header_type != 0x02) { 809 /* 810 * this is an error response from the VUB300 chip 811 * and we let the initiator handle it 812 */ 813 } else if (vub300->urb) { 814 vub300->cmd->error = 815 vub300_response_error(vub300->resp.error.error_code); 816 usb_unlink_urb(vub300->urb); 817 } else { 818 vub300->cmd->error = 819 vub300_response_error(vub300->resp.error.error_code); 820 usb_sg_cancel(&vub300->sg_request); 821 } 822 complete(&vub300->command_complete); /* got_response_in */ 823 } 824 825 static void command_out_completed(struct urb *urb) 826 { /* urb completion handler - hardirq */ 827 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context; 828 if (urb->status) { 829 complete(&vub300->command_complete); 830 } else { 831 int ret; 832 unsigned int pipe = 833 usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep); 834 usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe, 835 &vub300->resp, sizeof(vub300->resp), 836 command_res_completed, vub300); 837 vub300->command_res_urb->actual_length = 0; 838 ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC); 839 if (ret == 0) { 840 /* 841 * the urb completion handler will call 842 * our completion handler 843 */ 844 } else { 845 /* 846 * and thus we only call it directly 847 * when it will not be called 848 */ 849 complete(&vub300->command_complete); 850 } 851 } 852 } 853 854 /* 855 * the STUFF bits are masked out for the comparisons 856 */ 857 static void snoop_block_size_and_bus_width(struct vub300_mmc_host *vub300, 858 u32 cmd_arg) 859 { 860 if ((0xFBFFFE00 & cmd_arg) == 0x80022200) 861 vub300->fbs[1] = (cmd_arg << 8) | (0x00FF & vub300->fbs[1]); 862 else if ((0xFBFFFE00 & cmd_arg) == 0x80022000) 863 vub300->fbs[1] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[1]); 864 else if ((0xFBFFFE00 & cmd_arg) == 0x80042200) 865 vub300->fbs[2] = (cmd_arg << 8) | (0x00FF & vub300->fbs[2]); 866 else if ((0xFBFFFE00 & cmd_arg) == 0x80042000) 867 vub300->fbs[2] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[2]); 868 else if ((0xFBFFFE00 & cmd_arg) == 0x80062200) 869 vub300->fbs[3] = (cmd_arg << 8) | (0x00FF & vub300->fbs[3]); 870 else if ((0xFBFFFE00 & cmd_arg) == 0x80062000) 871 vub300->fbs[3] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[3]); 872 else if ((0xFBFFFE00 & cmd_arg) == 0x80082200) 873 vub300->fbs[4] = (cmd_arg << 8) | (0x00FF & vub300->fbs[4]); 874 else if ((0xFBFFFE00 & cmd_arg) == 0x80082000) 875 vub300->fbs[4] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[4]); 876 else if ((0xFBFFFE00 & cmd_arg) == 0x800A2200) 877 vub300->fbs[5] = (cmd_arg << 8) | (0x00FF & vub300->fbs[5]); 878 else if ((0xFBFFFE00 & cmd_arg) == 0x800A2000) 879 vub300->fbs[5] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[5]); 880 else if ((0xFBFFFE00 & cmd_arg) == 0x800C2200) 881 vub300->fbs[6] = (cmd_arg << 8) | (0x00FF & vub300->fbs[6]); 882 else if ((0xFBFFFE00 & cmd_arg) == 0x800C2000) 883 vub300->fbs[6] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[6]); 884 else if ((0xFBFFFE00 & cmd_arg) == 0x800E2200) 885 vub300->fbs[7] = (cmd_arg << 8) | (0x00FF & vub300->fbs[7]); 886 else if ((0xFBFFFE00 & cmd_arg) == 0x800E2000) 887 vub300->fbs[7] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[7]); 888 else if ((0xFBFFFE03 & cmd_arg) == 0x80000E00) 889 vub300->bus_width = 1; 890 else if ((0xFBFFFE03 & cmd_arg) == 0x80000E02) 891 vub300->bus_width = 4; 892 } 893 894 static void send_command(struct vub300_mmc_host *vub300) 895 { 896 /* cmd_mutex is held by vub300_cmndwork_thread */ 897 struct mmc_command *cmd = vub300->cmd; 898 struct mmc_data *data = vub300->data; 899 int retval; 900 int i; 901 u8 response_type; 902 if (vub300->app_spec) { 903 switch (cmd->opcode) { 904 case 6: 905 response_type = SDRT_1; 906 vub300->resp_len = 6; 907 if (0x00000000 == (0x00000003 & cmd->arg)) 908 vub300->bus_width = 1; 909 else if (0x00000002 == (0x00000003 & cmd->arg)) 910 vub300->bus_width = 4; 911 else 912 dev_err(&vub300->udev->dev, 913 "unexpected ACMD6 bus_width=%d\n", 914 0x00000003 & cmd->arg); 915 break; 916 case 13: 917 response_type = SDRT_1; 918 vub300->resp_len = 6; 919 break; 920 case 22: 921 response_type = SDRT_1; 922 vub300->resp_len = 6; 923 break; 924 case 23: 925 response_type = SDRT_1; 926 vub300->resp_len = 6; 927 break; 928 case 41: 929 response_type = SDRT_3; 930 vub300->resp_len = 6; 931 break; 932 case 42: 933 response_type = SDRT_1; 934 vub300->resp_len = 6; 935 break; 936 case 51: 937 response_type = SDRT_1; 938 vub300->resp_len = 6; 939 break; 940 case 55: 941 response_type = SDRT_1; 942 vub300->resp_len = 6; 943 break; 944 default: 945 vub300->resp_len = 0; 946 cmd->error = -EINVAL; 947 complete(&vub300->command_complete); 948 return; 949 } 950 vub300->app_spec = 0; 951 } else { 952 switch (cmd->opcode) { 953 case 0: 954 response_type = SDRT_NONE; 955 vub300->resp_len = 0; 956 break; 957 case 1: 958 response_type = SDRT_3; 959 vub300->resp_len = 6; 960 break; 961 case 2: 962 response_type = SDRT_2; 963 vub300->resp_len = 17; 964 break; 965 case 3: 966 response_type = SDRT_6; 967 vub300->resp_len = 6; 968 break; 969 case 4: 970 response_type = SDRT_NONE; 971 vub300->resp_len = 0; 972 break; 973 case 5: 974 response_type = SDRT_4; 975 vub300->resp_len = 6; 976 break; 977 case 6: 978 response_type = SDRT_1; 979 vub300->resp_len = 6; 980 break; 981 case 7: 982 response_type = SDRT_1B; 983 vub300->resp_len = 6; 984 break; 985 case 8: 986 response_type = SDRT_7; 987 vub300->resp_len = 6; 988 break; 989 case 9: 990 response_type = SDRT_2; 991 vub300->resp_len = 17; 992 break; 993 case 10: 994 response_type = SDRT_2; 995 vub300->resp_len = 17; 996 break; 997 case 12: 998 response_type = SDRT_1B; 999 vub300->resp_len = 6; 1000 break; 1001 case 13: 1002 response_type = SDRT_1; 1003 vub300->resp_len = 6; 1004 break; 1005 case 15: 1006 response_type = SDRT_NONE; 1007 vub300->resp_len = 0; 1008 break; 1009 case 16: 1010 for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++) 1011 vub300->fbs[i] = 0xFFFF & cmd->arg; 1012 response_type = SDRT_1; 1013 vub300->resp_len = 6; 1014 break; 1015 case 17: 1016 case 18: 1017 case 24: 1018 case 25: 1019 case 27: 1020 response_type = SDRT_1; 1021 vub300->resp_len = 6; 1022 break; 1023 case 28: 1024 case 29: 1025 response_type = SDRT_1B; 1026 vub300->resp_len = 6; 1027 break; 1028 case 30: 1029 case 32: 1030 case 33: 1031 response_type = SDRT_1; 1032 vub300->resp_len = 6; 1033 break; 1034 case 38: 1035 response_type = SDRT_1B; 1036 vub300->resp_len = 6; 1037 break; 1038 case 42: 1039 response_type = SDRT_1; 1040 vub300->resp_len = 6; 1041 break; 1042 case 52: 1043 response_type = SDRT_5; 1044 vub300->resp_len = 6; 1045 snoop_block_size_and_bus_width(vub300, cmd->arg); 1046 break; 1047 case 53: 1048 response_type = SDRT_5; 1049 vub300->resp_len = 6; 1050 break; 1051 case 55: 1052 response_type = SDRT_1; 1053 vub300->resp_len = 6; 1054 vub300->app_spec = 1; 1055 break; 1056 case 56: 1057 response_type = SDRT_1; 1058 vub300->resp_len = 6; 1059 break; 1060 default: 1061 vub300->resp_len = 0; 1062 cmd->error = -EINVAL; 1063 complete(&vub300->command_complete); 1064 return; 1065 } 1066 } 1067 /* 1068 * it is a shame that we can not use "sizeof(struct sd_command_header)" 1069 * this is because the packet _must_ be padded to 64 bytes 1070 */ 1071 vub300->cmnd.head.header_size = 20; 1072 vub300->cmnd.head.header_type = 0x00; 1073 vub300->cmnd.head.port_number = 0; /* "0" means port 1 */ 1074 vub300->cmnd.head.command_type = 0x00; /* standard read command */ 1075 vub300->cmnd.head.response_type = response_type; 1076 vub300->cmnd.head.command_index = cmd->opcode; 1077 vub300->cmnd.head.arguments[0] = cmd->arg >> 24; 1078 vub300->cmnd.head.arguments[1] = cmd->arg >> 16; 1079 vub300->cmnd.head.arguments[2] = cmd->arg >> 8; 1080 vub300->cmnd.head.arguments[3] = cmd->arg >> 0; 1081 if (cmd->opcode == 52) { 1082 int fn = 0x7 & (cmd->arg >> 28); 1083 vub300->cmnd.head.block_count[0] = 0; 1084 vub300->cmnd.head.block_count[1] = 0; 1085 vub300->cmnd.head.block_size[0] = (vub300->fbs[fn] >> 8) & 0xFF; 1086 vub300->cmnd.head.block_size[1] = (vub300->fbs[fn] >> 0) & 0xFF; 1087 vub300->cmnd.head.command_type = 0x00; 1088 vub300->cmnd.head.transfer_size[0] = 0; 1089 vub300->cmnd.head.transfer_size[1] = 0; 1090 vub300->cmnd.head.transfer_size[2] = 0; 1091 vub300->cmnd.head.transfer_size[3] = 0; 1092 } else if (!data) { 1093 vub300->cmnd.head.block_count[0] = 0; 1094 vub300->cmnd.head.block_count[1] = 0; 1095 vub300->cmnd.head.block_size[0] = (vub300->fbs[0] >> 8) & 0xFF; 1096 vub300->cmnd.head.block_size[1] = (vub300->fbs[0] >> 0) & 0xFF; 1097 vub300->cmnd.head.command_type = 0x00; 1098 vub300->cmnd.head.transfer_size[0] = 0; 1099 vub300->cmnd.head.transfer_size[1] = 0; 1100 vub300->cmnd.head.transfer_size[2] = 0; 1101 vub300->cmnd.head.transfer_size[3] = 0; 1102 } else if (cmd->opcode == 53) { 1103 int fn = 0x7 & (cmd->arg >> 28); 1104 if (0x08 & vub300->cmnd.head.arguments[0]) { /* BLOCK MODE */ 1105 vub300->cmnd.head.block_count[0] = 1106 (data->blocks >> 8) & 0xFF; 1107 vub300->cmnd.head.block_count[1] = 1108 (data->blocks >> 0) & 0xFF; 1109 vub300->cmnd.head.block_size[0] = 1110 (data->blksz >> 8) & 0xFF; 1111 vub300->cmnd.head.block_size[1] = 1112 (data->blksz >> 0) & 0xFF; 1113 } else { /* BYTE MODE */ 1114 vub300->cmnd.head.block_count[0] = 0; 1115 vub300->cmnd.head.block_count[1] = 0; 1116 vub300->cmnd.head.block_size[0] = 1117 (vub300->datasize >> 8) & 0xFF; 1118 vub300->cmnd.head.block_size[1] = 1119 (vub300->datasize >> 0) & 0xFF; 1120 } 1121 vub300->cmnd.head.command_type = 1122 (MMC_DATA_READ & data->flags) ? 0x00 : 0x80; 1123 vub300->cmnd.head.transfer_size[0] = 1124 (vub300->datasize >> 24) & 0xFF; 1125 vub300->cmnd.head.transfer_size[1] = 1126 (vub300->datasize >> 16) & 0xFF; 1127 vub300->cmnd.head.transfer_size[2] = 1128 (vub300->datasize >> 8) & 0xFF; 1129 vub300->cmnd.head.transfer_size[3] = 1130 (vub300->datasize >> 0) & 0xFF; 1131 if (vub300->datasize < vub300->fbs[fn]) { 1132 vub300->cmnd.head.block_count[0] = 0; 1133 vub300->cmnd.head.block_count[1] = 0; 1134 } 1135 } else { 1136 vub300->cmnd.head.block_count[0] = (data->blocks >> 8) & 0xFF; 1137 vub300->cmnd.head.block_count[1] = (data->blocks >> 0) & 0xFF; 1138 vub300->cmnd.head.block_size[0] = (data->blksz >> 8) & 0xFF; 1139 vub300->cmnd.head.block_size[1] = (data->blksz >> 0) & 0xFF; 1140 vub300->cmnd.head.command_type = 1141 (MMC_DATA_READ & data->flags) ? 0x00 : 0x80; 1142 vub300->cmnd.head.transfer_size[0] = 1143 (vub300->datasize >> 24) & 0xFF; 1144 vub300->cmnd.head.transfer_size[1] = 1145 (vub300->datasize >> 16) & 0xFF; 1146 vub300->cmnd.head.transfer_size[2] = 1147 (vub300->datasize >> 8) & 0xFF; 1148 vub300->cmnd.head.transfer_size[3] = 1149 (vub300->datasize >> 0) & 0xFF; 1150 if (vub300->datasize < vub300->fbs[0]) { 1151 vub300->cmnd.head.block_count[0] = 0; 1152 vub300->cmnd.head.block_count[1] = 0; 1153 } 1154 } 1155 if (vub300->cmnd.head.block_size[0] || vub300->cmnd.head.block_size[1]) { 1156 u16 block_size = vub300->cmnd.head.block_size[1] | 1157 (vub300->cmnd.head.block_size[0] << 8); 1158 u16 block_boundary = FIRMWARE_BLOCK_BOUNDARY - 1159 (FIRMWARE_BLOCK_BOUNDARY % block_size); 1160 vub300->cmnd.head.block_boundary[0] = 1161 (block_boundary >> 8) & 0xFF; 1162 vub300->cmnd.head.block_boundary[1] = 1163 (block_boundary >> 0) & 0xFF; 1164 } else { 1165 vub300->cmnd.head.block_boundary[0] = 0; 1166 vub300->cmnd.head.block_boundary[1] = 0; 1167 } 1168 usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev, 1169 usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep), 1170 &vub300->cmnd, sizeof(vub300->cmnd), 1171 command_out_completed, vub300); 1172 retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL); 1173 if (retval < 0) { 1174 cmd->error = retval; 1175 complete(&vub300->command_complete); 1176 return; 1177 } else { 1178 return; 1179 } 1180 } 1181 1182 /* 1183 * timer callback runs in atomic mode 1184 * so it cannot call usb_kill_urb() 1185 */ 1186 static void vub300_sg_timed_out(unsigned long data) 1187 { 1188 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)data; 1189 vub300->usb_timed_out = 1; 1190 usb_sg_cancel(&vub300->sg_request); 1191 usb_unlink_urb(vub300->command_out_urb); 1192 usb_unlink_urb(vub300->command_res_urb); 1193 } 1194 1195 static u16 roundup_to_multiple_of_64(u16 number) 1196 { 1197 return 0xFFC0 & (0x3F + number); 1198 } 1199 1200 /* 1201 * this is a separate function to solve the 80 column width restriction 1202 */ 1203 static void __download_offload_pseudocode(struct vub300_mmc_host *vub300, 1204 const struct firmware *fw) 1205 { 1206 u8 register_count = 0; 1207 u16 ts = 0; 1208 u16 interrupt_size = 0; 1209 const u8 *data = fw->data; 1210 int size = fw->size; 1211 u8 c; 1212 dev_info(&vub300->udev->dev, "using %s for SDIO offload processing\n", 1213 vub300->vub_name); 1214 do { 1215 c = *data++; 1216 } while (size-- && c); /* skip comment */ 1217 dev_info(&vub300->udev->dev, "using offload firmware %s %s\n", fw->data, 1218 vub300->vub_name); 1219 if (size < 4) { 1220 dev_err(&vub300->udev->dev, 1221 "corrupt offload pseudocode in firmware %s\n", 1222 vub300->vub_name); 1223 strncpy(vub300->vub_name, "corrupt offload pseudocode", 1224 sizeof(vub300->vub_name)); 1225 return; 1226 } 1227 interrupt_size += *data++; 1228 size -= 1; 1229 interrupt_size <<= 8; 1230 interrupt_size += *data++; 1231 size -= 1; 1232 if (interrupt_size < size) { 1233 u16 xfer_length = roundup_to_multiple_of_64(interrupt_size); 1234 u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL); 1235 if (xfer_buffer) { 1236 int retval; 1237 memcpy(xfer_buffer, data, interrupt_size); 1238 memset(xfer_buffer + interrupt_size, 0, 1239 xfer_length - interrupt_size); 1240 size -= interrupt_size; 1241 data += interrupt_size; 1242 retval = 1243 usb_control_msg(vub300->udev, 1244 usb_sndctrlpipe(vub300->udev, 0), 1245 SET_INTERRUPT_PSEUDOCODE, 1246 USB_DIR_OUT | USB_TYPE_VENDOR | 1247 USB_RECIP_DEVICE, 0x0000, 0x0000, 1248 xfer_buffer, xfer_length, HZ); 1249 kfree(xfer_buffer); 1250 if (retval < 0) { 1251 strncpy(vub300->vub_name, 1252 "SDIO pseudocode download failed", 1253 sizeof(vub300->vub_name)); 1254 return; 1255 } 1256 } else { 1257 dev_err(&vub300->udev->dev, 1258 "not enough memory for xfer buffer to send" 1259 " INTERRUPT_PSEUDOCODE for %s %s\n", fw->data, 1260 vub300->vub_name); 1261 strncpy(vub300->vub_name, 1262 "SDIO interrupt pseudocode download failed", 1263 sizeof(vub300->vub_name)); 1264 return; 1265 } 1266 } else { 1267 dev_err(&vub300->udev->dev, 1268 "corrupt interrupt pseudocode in firmware %s %s\n", 1269 fw->data, vub300->vub_name); 1270 strncpy(vub300->vub_name, "corrupt interrupt pseudocode", 1271 sizeof(vub300->vub_name)); 1272 return; 1273 } 1274 ts += *data++; 1275 size -= 1; 1276 ts <<= 8; 1277 ts += *data++; 1278 size -= 1; 1279 if (ts < size) { 1280 u16 xfer_length = roundup_to_multiple_of_64(ts); 1281 u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL); 1282 if (xfer_buffer) { 1283 int retval; 1284 memcpy(xfer_buffer, data, ts); 1285 memset(xfer_buffer + ts, 0, 1286 xfer_length - ts); 1287 size -= ts; 1288 data += ts; 1289 retval = 1290 usb_control_msg(vub300->udev, 1291 usb_sndctrlpipe(vub300->udev, 0), 1292 SET_TRANSFER_PSEUDOCODE, 1293 USB_DIR_OUT | USB_TYPE_VENDOR | 1294 USB_RECIP_DEVICE, 0x0000, 0x0000, 1295 xfer_buffer, xfer_length, HZ); 1296 kfree(xfer_buffer); 1297 if (retval < 0) { 1298 strncpy(vub300->vub_name, 1299 "SDIO pseudocode download failed", 1300 sizeof(vub300->vub_name)); 1301 return; 1302 } 1303 } else { 1304 dev_err(&vub300->udev->dev, 1305 "not enough memory for xfer buffer to send" 1306 " TRANSFER_PSEUDOCODE for %s %s\n", fw->data, 1307 vub300->vub_name); 1308 strncpy(vub300->vub_name, 1309 "SDIO transfer pseudocode download failed", 1310 sizeof(vub300->vub_name)); 1311 return; 1312 } 1313 } else { 1314 dev_err(&vub300->udev->dev, 1315 "corrupt transfer pseudocode in firmware %s %s\n", 1316 fw->data, vub300->vub_name); 1317 strncpy(vub300->vub_name, "corrupt transfer pseudocode", 1318 sizeof(vub300->vub_name)); 1319 return; 1320 } 1321 register_count += *data++; 1322 size -= 1; 1323 if (register_count * 4 == size) { 1324 int I = vub300->dynamic_register_count = register_count; 1325 int i = 0; 1326 while (I--) { 1327 unsigned int func_num = 0; 1328 vub300->sdio_register[i].func_num = *data++; 1329 size -= 1; 1330 func_num += *data++; 1331 size -= 1; 1332 func_num <<= 8; 1333 func_num += *data++; 1334 size -= 1; 1335 func_num <<= 8; 1336 func_num += *data++; 1337 size -= 1; 1338 vub300->sdio_register[i].sdio_reg = func_num; 1339 vub300->sdio_register[i].activate = 1; 1340 vub300->sdio_register[i].prepared = 0; 1341 i += 1; 1342 } 1343 dev_info(&vub300->udev->dev, 1344 "initialized %d dynamic pseudocode registers\n", 1345 vub300->dynamic_register_count); 1346 return; 1347 } else { 1348 dev_err(&vub300->udev->dev, 1349 "corrupt dynamic registers in firmware %s\n", 1350 vub300->vub_name); 1351 strncpy(vub300->vub_name, "corrupt dynamic registers", 1352 sizeof(vub300->vub_name)); 1353 return; 1354 } 1355 } 1356 1357 /* 1358 * if the binary containing the EMPTY PseudoCode can not be found 1359 * vub300->vub_name is set anyway in order to prevent an automatic retry 1360 */ 1361 static void download_offload_pseudocode(struct vub300_mmc_host *vub300) 1362 { 1363 struct mmc_card *card = vub300->mmc->card; 1364 int sdio_funcs = card->sdio_funcs; 1365 const struct firmware *fw = NULL; 1366 int l = snprintf(vub300->vub_name, sizeof(vub300->vub_name), 1367 "vub_%04X%04X", card->cis.vendor, card->cis.device); 1368 int n = 0; 1369 int retval; 1370 for (n = 0; n < sdio_funcs; n++) { 1371 struct sdio_func *sf = card->sdio_func[n]; 1372 l += snprintf(vub300->vub_name + l, 1373 sizeof(vub300->vub_name) - l, "_%04X%04X", 1374 sf->vendor, sf->device); 1375 } 1376 snprintf(vub300->vub_name + l, sizeof(vub300->vub_name) - l, ".bin"); 1377 dev_info(&vub300->udev->dev, "requesting offload firmware %s\n", 1378 vub300->vub_name); 1379 retval = request_firmware(&fw, vub300->vub_name, &card->dev); 1380 if (retval < 0) { 1381 strncpy(vub300->vub_name, "vub_default.bin", 1382 sizeof(vub300->vub_name)); 1383 retval = request_firmware(&fw, vub300->vub_name, &card->dev); 1384 if (retval < 0) { 1385 strncpy(vub300->vub_name, 1386 "no SDIO offload firmware found", 1387 sizeof(vub300->vub_name)); 1388 } else { 1389 __download_offload_pseudocode(vub300, fw); 1390 release_firmware(fw); 1391 } 1392 } else { 1393 __download_offload_pseudocode(vub300, fw); 1394 release_firmware(fw); 1395 } 1396 } 1397 1398 static void vub300_usb_bulk_msg_completion(struct urb *urb) 1399 { /* urb completion handler - hardirq */ 1400 complete((struct completion *)urb->context); 1401 } 1402 1403 static int vub300_usb_bulk_msg(struct vub300_mmc_host *vub300, 1404 unsigned int pipe, void *data, int len, 1405 int *actual_length, int timeout_msecs) 1406 { 1407 /* cmd_mutex is held by vub300_cmndwork_thread */ 1408 struct usb_device *usb_dev = vub300->udev; 1409 struct completion done; 1410 int retval; 1411 vub300->urb = usb_alloc_urb(0, GFP_KERNEL); 1412 if (!vub300->urb) 1413 return -ENOMEM; 1414 usb_fill_bulk_urb(vub300->urb, usb_dev, pipe, data, len, 1415 vub300_usb_bulk_msg_completion, NULL); 1416 init_completion(&done); 1417 vub300->urb->context = &done; 1418 vub300->urb->actual_length = 0; 1419 retval = usb_submit_urb(vub300->urb, GFP_KERNEL); 1420 if (unlikely(retval)) 1421 goto out; 1422 if (!wait_for_completion_timeout 1423 (&done, msecs_to_jiffies(timeout_msecs))) { 1424 retval = -ETIMEDOUT; 1425 usb_kill_urb(vub300->urb); 1426 } else { 1427 retval = vub300->urb->status; 1428 } 1429 out: 1430 *actual_length = vub300->urb->actual_length; 1431 usb_free_urb(vub300->urb); 1432 vub300->urb = NULL; 1433 return retval; 1434 } 1435 1436 static int __command_read_data(struct vub300_mmc_host *vub300, 1437 struct mmc_command *cmd, struct mmc_data *data) 1438 { 1439 /* cmd_mutex is held by vub300_cmndwork_thread */ 1440 int linear_length = vub300->datasize; 1441 int padded_length = vub300->large_usb_packets ? 1442 ((511 + linear_length) >> 9) << 9 : 1443 ((63 + linear_length) >> 6) << 6; 1444 if ((padded_length == linear_length) || !pad_input_to_usb_pkt) { 1445 int result; 1446 unsigned pipe; 1447 pipe = usb_rcvbulkpipe(vub300->udev, vub300->data_inp_ep); 1448 result = usb_sg_init(&vub300->sg_request, vub300->udev, 1449 pipe, 0, data->sg, 1450 data->sg_len, 0, GFP_KERNEL); 1451 if (result < 0) { 1452 usb_unlink_urb(vub300->command_out_urb); 1453 usb_unlink_urb(vub300->command_res_urb); 1454 cmd->error = result; 1455 data->bytes_xfered = 0; 1456 return 0; 1457 } else { 1458 vub300->sg_transfer_timer.expires = 1459 jiffies + msecs_to_jiffies(2000 + 1460 (linear_length / 16384)); 1461 add_timer(&vub300->sg_transfer_timer); 1462 usb_sg_wait(&vub300->sg_request); 1463 del_timer(&vub300->sg_transfer_timer); 1464 if (vub300->sg_request.status < 0) { 1465 cmd->error = vub300->sg_request.status; 1466 data->bytes_xfered = 0; 1467 return 0; 1468 } else { 1469 data->bytes_xfered = vub300->datasize; 1470 return linear_length; 1471 } 1472 } 1473 } else { 1474 u8 *buf = kmalloc(padded_length, GFP_KERNEL); 1475 if (buf) { 1476 int result; 1477 unsigned pipe = usb_rcvbulkpipe(vub300->udev, 1478 vub300->data_inp_ep); 1479 int actual_length = 0; 1480 result = vub300_usb_bulk_msg(vub300, pipe, buf, 1481 padded_length, &actual_length, 1482 2000 + (padded_length / 16384)); 1483 if (result < 0) { 1484 cmd->error = result; 1485 data->bytes_xfered = 0; 1486 kfree(buf); 1487 return 0; 1488 } else if (actual_length < linear_length) { 1489 cmd->error = -EREMOTEIO; 1490 data->bytes_xfered = 0; 1491 kfree(buf); 1492 return 0; 1493 } else { 1494 sg_copy_from_buffer(data->sg, data->sg_len, buf, 1495 linear_length); 1496 kfree(buf); 1497 data->bytes_xfered = vub300->datasize; 1498 return linear_length; 1499 } 1500 } else { 1501 cmd->error = -ENOMEM; 1502 data->bytes_xfered = 0; 1503 return 0; 1504 } 1505 } 1506 } 1507 1508 static int __command_write_data(struct vub300_mmc_host *vub300, 1509 struct mmc_command *cmd, struct mmc_data *data) 1510 { 1511 /* cmd_mutex is held by vub300_cmndwork_thread */ 1512 unsigned pipe = usb_sndbulkpipe(vub300->udev, vub300->data_out_ep); 1513 int linear_length = vub300->datasize; 1514 int modulo_64_length = linear_length & 0x003F; 1515 int modulo_512_length = linear_length & 0x01FF; 1516 if (linear_length < 64) { 1517 int result; 1518 int actual_length; 1519 sg_copy_to_buffer(data->sg, data->sg_len, 1520 vub300->padded_buffer, 1521 sizeof(vub300->padded_buffer)); 1522 memset(vub300->padded_buffer + linear_length, 0, 1523 sizeof(vub300->padded_buffer) - linear_length); 1524 result = vub300_usb_bulk_msg(vub300, pipe, vub300->padded_buffer, 1525 sizeof(vub300->padded_buffer), 1526 &actual_length, 2000 + 1527 (sizeof(vub300->padded_buffer) / 1528 16384)); 1529 if (result < 0) { 1530 cmd->error = result; 1531 data->bytes_xfered = 0; 1532 } else { 1533 data->bytes_xfered = vub300->datasize; 1534 } 1535 } else if ((!vub300->large_usb_packets && (0 < modulo_64_length)) || 1536 (vub300->large_usb_packets && (64 > modulo_512_length)) 1537 ) { /* don't you just love these work-rounds */ 1538 int padded_length = ((63 + linear_length) >> 6) << 6; 1539 u8 *buf = kmalloc(padded_length, GFP_KERNEL); 1540 if (buf) { 1541 int result; 1542 int actual_length; 1543 sg_copy_to_buffer(data->sg, data->sg_len, buf, 1544 padded_length); 1545 memset(buf + linear_length, 0, 1546 padded_length - linear_length); 1547 result = 1548 vub300_usb_bulk_msg(vub300, pipe, buf, 1549 padded_length, &actual_length, 1550 2000 + padded_length / 16384); 1551 kfree(buf); 1552 if (result < 0) { 1553 cmd->error = result; 1554 data->bytes_xfered = 0; 1555 } else { 1556 data->bytes_xfered = vub300->datasize; 1557 } 1558 } else { 1559 cmd->error = -ENOMEM; 1560 data->bytes_xfered = 0; 1561 } 1562 } else { /* no data padding required */ 1563 int result; 1564 unsigned char buf[64 * 4]; 1565 sg_copy_to_buffer(data->sg, data->sg_len, buf, sizeof(buf)); 1566 result = usb_sg_init(&vub300->sg_request, vub300->udev, 1567 pipe, 0, data->sg, 1568 data->sg_len, 0, GFP_KERNEL); 1569 if (result < 0) { 1570 usb_unlink_urb(vub300->command_out_urb); 1571 usb_unlink_urb(vub300->command_res_urb); 1572 cmd->error = result; 1573 data->bytes_xfered = 0; 1574 } else { 1575 vub300->sg_transfer_timer.expires = 1576 jiffies + msecs_to_jiffies(2000 + 1577 linear_length / 16384); 1578 add_timer(&vub300->sg_transfer_timer); 1579 usb_sg_wait(&vub300->sg_request); 1580 if (cmd->error) { 1581 data->bytes_xfered = 0; 1582 } else { 1583 del_timer(&vub300->sg_transfer_timer); 1584 if (vub300->sg_request.status < 0) { 1585 cmd->error = vub300->sg_request.status; 1586 data->bytes_xfered = 0; 1587 } else { 1588 data->bytes_xfered = vub300->datasize; 1589 } 1590 } 1591 } 1592 } 1593 return linear_length; 1594 } 1595 1596 static void __vub300_command_response(struct vub300_mmc_host *vub300, 1597 struct mmc_command *cmd, 1598 struct mmc_data *data, int data_length) 1599 { 1600 /* cmd_mutex is held by vub300_cmndwork_thread */ 1601 long respretval; 1602 int msec_timeout = 1000 + data_length / 4; 1603 respretval = 1604 wait_for_completion_timeout(&vub300->command_complete, 1605 msecs_to_jiffies(msec_timeout)); 1606 if (respretval == 0) { /* TIMED OUT */ 1607 /* we don't know which of "out" and "res" if any failed */ 1608 int result; 1609 vub300->usb_timed_out = 1; 1610 usb_kill_urb(vub300->command_out_urb); 1611 usb_kill_urb(vub300->command_res_urb); 1612 cmd->error = -ETIMEDOUT; 1613 result = usb_lock_device_for_reset(vub300->udev, 1614 vub300->interface); 1615 if (result == 0) { 1616 result = usb_reset_device(vub300->udev); 1617 usb_unlock_device(vub300->udev); 1618 } 1619 } else if (respretval < 0) { 1620 /* we don't know which of "out" and "res" if any failed */ 1621 usb_kill_urb(vub300->command_out_urb); 1622 usb_kill_urb(vub300->command_res_urb); 1623 cmd->error = respretval; 1624 } else if (cmd->error) { 1625 /* 1626 * the error occurred sending the command 1627 * or receiving the response 1628 */ 1629 } else if (vub300->command_out_urb->status) { 1630 vub300->usb_transport_fail = vub300->command_out_urb->status; 1631 cmd->error = -EPROTO == vub300->command_out_urb->status ? 1632 -ESHUTDOWN : vub300->command_out_urb->status; 1633 } else if (vub300->command_res_urb->status) { 1634 vub300->usb_transport_fail = vub300->command_res_urb->status; 1635 cmd->error = -EPROTO == vub300->command_res_urb->status ? 1636 -ESHUTDOWN : vub300->command_res_urb->status; 1637 } else if (vub300->resp.common.header_type == 0x00) { 1638 /* 1639 * the command completed successfully 1640 * and there was no piggybacked data 1641 */ 1642 } else if (vub300->resp.common.header_type == RESPONSE_ERROR) { 1643 cmd->error = 1644 vub300_response_error(vub300->resp.error.error_code); 1645 if (vub300->data) 1646 usb_sg_cancel(&vub300->sg_request); 1647 } else if (vub300->resp.common.header_type == RESPONSE_PIGGYBACKED) { 1648 int offloaded_data_length = 1649 vub300->resp.common.header_size - 1650 sizeof(struct sd_register_header); 1651 int register_count = offloaded_data_length >> 3; 1652 int ri = 0; 1653 while (register_count--) { 1654 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]); 1655 ri += 1; 1656 } 1657 vub300->resp.common.header_size = 1658 sizeof(struct sd_register_header); 1659 vub300->resp.common.header_type = 0x00; 1660 cmd->error = 0; 1661 } else if (vub300->resp.common.header_type == RESPONSE_PIG_DISABLED) { 1662 int offloaded_data_length = 1663 vub300->resp.common.header_size - 1664 sizeof(struct sd_register_header); 1665 int register_count = offloaded_data_length >> 3; 1666 int ri = 0; 1667 while (register_count--) { 1668 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]); 1669 ri += 1; 1670 } 1671 mutex_lock(&vub300->irq_mutex); 1672 if (vub300->irqs_queued) { 1673 vub300->irqs_queued += 1; 1674 } else if (vub300->irq_enabled) { 1675 vub300->irqs_queued += 1; 1676 vub300_queue_poll_work(vub300, 0); 1677 } else { 1678 vub300->irqs_queued += 1; 1679 } 1680 vub300->irq_disabled = 1; 1681 mutex_unlock(&vub300->irq_mutex); 1682 vub300->resp.common.header_size = 1683 sizeof(struct sd_register_header); 1684 vub300->resp.common.header_type = 0x00; 1685 cmd->error = 0; 1686 } else if (vub300->resp.common.header_type == RESPONSE_PIG_ENABLED) { 1687 int offloaded_data_length = 1688 vub300->resp.common.header_size - 1689 sizeof(struct sd_register_header); 1690 int register_count = offloaded_data_length >> 3; 1691 int ri = 0; 1692 while (register_count--) { 1693 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]); 1694 ri += 1; 1695 } 1696 mutex_lock(&vub300->irq_mutex); 1697 if (vub300->irqs_queued) { 1698 vub300->irqs_queued += 1; 1699 } else if (vub300->irq_enabled) { 1700 vub300->irqs_queued += 1; 1701 vub300_queue_poll_work(vub300, 0); 1702 } else { 1703 vub300->irqs_queued += 1; 1704 } 1705 vub300->irq_disabled = 0; 1706 mutex_unlock(&vub300->irq_mutex); 1707 vub300->resp.common.header_size = 1708 sizeof(struct sd_register_header); 1709 vub300->resp.common.header_type = 0x00; 1710 cmd->error = 0; 1711 } else { 1712 cmd->error = -EINVAL; 1713 } 1714 } 1715 1716 static void construct_request_response(struct vub300_mmc_host *vub300, 1717 struct mmc_command *cmd) 1718 { 1719 int resp_len = vub300->resp_len; 1720 int less_cmd = (17 == resp_len) ? resp_len : resp_len - 1; 1721 int bytes = 3 & less_cmd; 1722 int words = less_cmd >> 2; 1723 u8 *r = vub300->resp.response.command_response; 1724 if (bytes == 3) { 1725 cmd->resp[words] = (r[1 + (words << 2)] << 24) 1726 | (r[2 + (words << 2)] << 16) 1727 | (r[3 + (words << 2)] << 8); 1728 } else if (bytes == 2) { 1729 cmd->resp[words] = (r[1 + (words << 2)] << 24) 1730 | (r[2 + (words << 2)] << 16); 1731 } else if (bytes == 1) { 1732 cmd->resp[words] = (r[1 + (words << 2)] << 24); 1733 } 1734 while (words-- > 0) { 1735 cmd->resp[words] = (r[1 + (words << 2)] << 24) 1736 | (r[2 + (words << 2)] << 16) 1737 | (r[3 + (words << 2)] << 8) 1738 | (r[4 + (words << 2)] << 0); 1739 } 1740 if ((cmd->opcode == 53) && (0x000000FF & cmd->resp[0])) 1741 cmd->resp[0] &= 0xFFFFFF00; 1742 } 1743 1744 /* this thread runs only when there is an upper level command req outstanding */ 1745 static void vub300_cmndwork_thread(struct work_struct *work) 1746 { 1747 struct vub300_mmc_host *vub300 = 1748 container_of(work, struct vub300_mmc_host, cmndwork); 1749 if (!vub300->interface) { 1750 kref_put(&vub300->kref, vub300_delete); 1751 return; 1752 } else { 1753 struct mmc_request *req = vub300->req; 1754 struct mmc_command *cmd = vub300->cmd; 1755 struct mmc_data *data = vub300->data; 1756 int data_length; 1757 mutex_lock(&vub300->cmd_mutex); 1758 init_completion(&vub300->command_complete); 1759 if (likely(vub300->vub_name[0]) || !vub300->mmc->card || 1760 !mmc_card_present(vub300->mmc->card)) { 1761 /* 1762 * the name of the EMPTY Pseudo firmware file 1763 * is used as a flag to indicate that the file 1764 * has been already downloaded to the VUB300 chip 1765 */ 1766 } else if (0 == vub300->mmc->card->sdio_funcs) { 1767 strncpy(vub300->vub_name, "SD memory device", 1768 sizeof(vub300->vub_name)); 1769 } else { 1770 download_offload_pseudocode(vub300); 1771 } 1772 send_command(vub300); 1773 if (!data) 1774 data_length = 0; 1775 else if (MMC_DATA_READ & data->flags) 1776 data_length = __command_read_data(vub300, cmd, data); 1777 else 1778 data_length = __command_write_data(vub300, cmd, data); 1779 __vub300_command_response(vub300, cmd, data, data_length); 1780 vub300->req = NULL; 1781 vub300->cmd = NULL; 1782 vub300->data = NULL; 1783 if (cmd->error) { 1784 if (cmd->error == -ENOMEDIUM) 1785 check_vub300_port_status(vub300); 1786 mutex_unlock(&vub300->cmd_mutex); 1787 mmc_request_done(vub300->mmc, req); 1788 kref_put(&vub300->kref, vub300_delete); 1789 return; 1790 } else { 1791 construct_request_response(vub300, cmd); 1792 vub300->resp_len = 0; 1793 mutex_unlock(&vub300->cmd_mutex); 1794 kref_put(&vub300->kref, vub300_delete); 1795 mmc_request_done(vub300->mmc, req); 1796 return; 1797 } 1798 } 1799 } 1800 1801 static int examine_cyclic_buffer(struct vub300_mmc_host *vub300, 1802 struct mmc_command *cmd, u8 Function) 1803 { 1804 /* cmd_mutex is held by vub300_mmc_request */ 1805 u8 cmd0 = 0xFF & (cmd->arg >> 24); 1806 u8 cmd1 = 0xFF & (cmd->arg >> 16); 1807 u8 cmd2 = 0xFF & (cmd->arg >> 8); 1808 u8 cmd3 = 0xFF & (cmd->arg >> 0); 1809 int first = MAXREGMASK & vub300->fn[Function].offload_point; 1810 struct offload_registers_access *rf = &vub300->fn[Function].reg[first]; 1811 if (cmd0 == rf->command_byte[0] && 1812 cmd1 == rf->command_byte[1] && 1813 cmd2 == rf->command_byte[2] && 1814 cmd3 == rf->command_byte[3]) { 1815 u8 checksum = 0x00; 1816 cmd->resp[1] = checksum << 24; 1817 cmd->resp[0] = (rf->Respond_Byte[0] << 24) 1818 | (rf->Respond_Byte[1] << 16) 1819 | (rf->Respond_Byte[2] << 8) 1820 | (rf->Respond_Byte[3] << 0); 1821 vub300->fn[Function].offload_point += 1; 1822 vub300->fn[Function].offload_count -= 1; 1823 vub300->total_offload_count -= 1; 1824 return 1; 1825 } else { 1826 int delta = 1; /* because it does not match the first one */ 1827 u8 register_count = vub300->fn[Function].offload_count - 1; 1828 u32 register_point = vub300->fn[Function].offload_point + 1; 1829 while (0 < register_count) { 1830 int point = MAXREGMASK & register_point; 1831 struct offload_registers_access *r = 1832 &vub300->fn[Function].reg[point]; 1833 if (cmd0 == r->command_byte[0] && 1834 cmd1 == r->command_byte[1] && 1835 cmd2 == r->command_byte[2] && 1836 cmd3 == r->command_byte[3]) { 1837 u8 checksum = 0x00; 1838 cmd->resp[1] = checksum << 24; 1839 cmd->resp[0] = (r->Respond_Byte[0] << 24) 1840 | (r->Respond_Byte[1] << 16) 1841 | (r->Respond_Byte[2] << 8) 1842 | (r->Respond_Byte[3] << 0); 1843 vub300->fn[Function].offload_point += delta; 1844 vub300->fn[Function].offload_count -= delta; 1845 vub300->total_offload_count -= delta; 1846 return 1; 1847 } else { 1848 register_point += 1; 1849 register_count -= 1; 1850 delta += 1; 1851 continue; 1852 } 1853 } 1854 return 0; 1855 } 1856 } 1857 1858 static int satisfy_request_from_offloaded_data(struct vub300_mmc_host *vub300, 1859 struct mmc_command *cmd) 1860 { 1861 /* cmd_mutex is held by vub300_mmc_request */ 1862 u8 regs = vub300->dynamic_register_count; 1863 u8 i = 0; 1864 u8 func = FUN(cmd); 1865 u32 reg = REG(cmd); 1866 while (0 < regs--) { 1867 if ((vub300->sdio_register[i].func_num == func) && 1868 (vub300->sdio_register[i].sdio_reg == reg)) { 1869 if (!vub300->sdio_register[i].prepared) { 1870 return 0; 1871 } else if ((0x80000000 & cmd->arg) == 0x80000000) { 1872 /* 1873 * a write to a dynamic register 1874 * nullifies our offloaded value 1875 */ 1876 vub300->sdio_register[i].prepared = 0; 1877 return 0; 1878 } else { 1879 u8 checksum = 0x00; 1880 u8 rsp0 = 0x00; 1881 u8 rsp1 = 0x00; 1882 u8 rsp2 = vub300->sdio_register[i].response; 1883 u8 rsp3 = vub300->sdio_register[i].regvalue; 1884 vub300->sdio_register[i].prepared = 0; 1885 cmd->resp[1] = checksum << 24; 1886 cmd->resp[0] = (rsp0 << 24) 1887 | (rsp1 << 16) 1888 | (rsp2 << 8) 1889 | (rsp3 << 0); 1890 return 1; 1891 } 1892 } else { 1893 i += 1; 1894 continue; 1895 } 1896 } 1897 if (vub300->total_offload_count == 0) 1898 return 0; 1899 else if (vub300->fn[func].offload_count == 0) 1900 return 0; 1901 else 1902 return examine_cyclic_buffer(vub300, cmd, func); 1903 } 1904 1905 static void vub300_mmc_request(struct mmc_host *mmc, struct mmc_request *req) 1906 { /* NOT irq */ 1907 struct mmc_command *cmd = req->cmd; 1908 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 1909 if (!vub300->interface) { 1910 cmd->error = -ESHUTDOWN; 1911 mmc_request_done(mmc, req); 1912 return; 1913 } else { 1914 struct mmc_data *data = req->data; 1915 if (!vub300->card_powered) { 1916 cmd->error = -ENOMEDIUM; 1917 mmc_request_done(mmc, req); 1918 return; 1919 } 1920 if (!vub300->card_present) { 1921 cmd->error = -ENOMEDIUM; 1922 mmc_request_done(mmc, req); 1923 return; 1924 } 1925 if (vub300->usb_transport_fail) { 1926 cmd->error = vub300->usb_transport_fail; 1927 mmc_request_done(mmc, req); 1928 return; 1929 } 1930 if (!vub300->interface) { 1931 cmd->error = -ENODEV; 1932 mmc_request_done(mmc, req); 1933 return; 1934 } 1935 kref_get(&vub300->kref); 1936 mutex_lock(&vub300->cmd_mutex); 1937 mod_timer(&vub300->inactivity_timer, jiffies + HZ); 1938 /* 1939 * for performance we have to return immediately 1940 * if the requested data has been offloaded 1941 */ 1942 if (cmd->opcode == 52 && 1943 satisfy_request_from_offloaded_data(vub300, cmd)) { 1944 cmd->error = 0; 1945 mutex_unlock(&vub300->cmd_mutex); 1946 kref_put(&vub300->kref, vub300_delete); 1947 mmc_request_done(mmc, req); 1948 return; 1949 } else { 1950 vub300->cmd = cmd; 1951 vub300->req = req; 1952 vub300->data = data; 1953 if (data) 1954 vub300->datasize = data->blksz * data->blocks; 1955 else 1956 vub300->datasize = 0; 1957 vub300_queue_cmnd_work(vub300); 1958 mutex_unlock(&vub300->cmd_mutex); 1959 kref_put(&vub300->kref, vub300_delete); 1960 /* 1961 * the kernel lock diagnostics complain 1962 * if the cmd_mutex * is "passed on" 1963 * to the cmndwork thread, 1964 * so we must release it now 1965 * and re-acquire it in the cmndwork thread 1966 */ 1967 } 1968 } 1969 } 1970 1971 static void __set_clock_speed(struct vub300_mmc_host *vub300, u8 buf[8], 1972 struct mmc_ios *ios) 1973 { 1974 int buf_array_size = 8; /* ARRAY_SIZE(buf) does not work !!! */ 1975 int retval; 1976 u32 kHzClock; 1977 if (ios->clock >= 48000000) 1978 kHzClock = 48000; 1979 else if (ios->clock >= 24000000) 1980 kHzClock = 24000; 1981 else if (ios->clock >= 20000000) 1982 kHzClock = 20000; 1983 else if (ios->clock >= 15000000) 1984 kHzClock = 15000; 1985 else if (ios->clock >= 200000) 1986 kHzClock = 200; 1987 else 1988 kHzClock = 0; 1989 { 1990 int i; 1991 u64 c = kHzClock; 1992 for (i = 0; i < buf_array_size; i++) { 1993 buf[i] = c; 1994 c >>= 8; 1995 } 1996 } 1997 retval = 1998 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0), 1999 SET_CLOCK_SPEED, 2000 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2001 0x00, 0x00, buf, buf_array_size, HZ); 2002 if (retval != 8) { 2003 dev_err(&vub300->udev->dev, "SET_CLOCK_SPEED" 2004 " %dkHz failed with retval=%d\n", kHzClock, retval); 2005 } else { 2006 dev_dbg(&vub300->udev->dev, "SET_CLOCK_SPEED" 2007 " %dkHz\n", kHzClock); 2008 } 2009 } 2010 2011 static void vub300_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 2012 { /* NOT irq */ 2013 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 2014 if (!vub300->interface) 2015 return; 2016 kref_get(&vub300->kref); 2017 mutex_lock(&vub300->cmd_mutex); 2018 if ((ios->power_mode == MMC_POWER_OFF) && vub300->card_powered) { 2019 vub300->card_powered = 0; 2020 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0), 2021 SET_SD_POWER, 2022 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2023 0x0000, 0x0000, NULL, 0, HZ); 2024 /* must wait for the VUB300 u-proc to boot up */ 2025 msleep(600); 2026 } else if ((ios->power_mode == MMC_POWER_UP) && !vub300->card_powered) { 2027 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0), 2028 SET_SD_POWER, 2029 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2030 0x0001, 0x0000, NULL, 0, HZ); 2031 msleep(600); 2032 vub300->card_powered = 1; 2033 } else if (ios->power_mode == MMC_POWER_ON) { 2034 u8 *buf = kmalloc(8, GFP_KERNEL); 2035 if (buf) { 2036 __set_clock_speed(vub300, buf, ios); 2037 kfree(buf); 2038 } 2039 } else { 2040 /* this should mean no change of state */ 2041 } 2042 mutex_unlock(&vub300->cmd_mutex); 2043 kref_put(&vub300->kref, vub300_delete); 2044 } 2045 2046 static int vub300_mmc_get_ro(struct mmc_host *mmc) 2047 { 2048 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 2049 return vub300->read_only; 2050 } 2051 2052 static void vub300_enable_sdio_irq(struct mmc_host *mmc, int enable) 2053 { /* NOT irq */ 2054 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 2055 if (!vub300->interface) 2056 return; 2057 kref_get(&vub300->kref); 2058 if (enable) { 2059 mutex_lock(&vub300->irq_mutex); 2060 if (vub300->irqs_queued) { 2061 vub300->irqs_queued -= 1; 2062 mmc_signal_sdio_irq(vub300->mmc); 2063 } else if (vub300->irq_disabled) { 2064 vub300->irq_disabled = 0; 2065 vub300->irq_enabled = 1; 2066 vub300_queue_poll_work(vub300, 0); 2067 } else if (vub300->irq_enabled) { 2068 /* this should not happen, so we will just ignore it */ 2069 } else { 2070 vub300->irq_enabled = 1; 2071 vub300_queue_poll_work(vub300, 0); 2072 } 2073 mutex_unlock(&vub300->irq_mutex); 2074 } else { 2075 vub300->irq_enabled = 0; 2076 } 2077 kref_put(&vub300->kref, vub300_delete); 2078 } 2079 2080 static void vub300_init_card(struct mmc_host *mmc, struct mmc_card *card) 2081 { /* NOT irq */ 2082 struct vub300_mmc_host *vub300 = mmc_priv(mmc); 2083 dev_info(&vub300->udev->dev, "NO host QUIRKS for this card\n"); 2084 } 2085 2086 static struct mmc_host_ops vub300_mmc_ops = { 2087 .request = vub300_mmc_request, 2088 .set_ios = vub300_mmc_set_ios, 2089 .get_ro = vub300_mmc_get_ro, 2090 .enable_sdio_irq = vub300_enable_sdio_irq, 2091 .init_card = vub300_init_card, 2092 }; 2093 2094 static int vub300_probe(struct usb_interface *interface, 2095 const struct usb_device_id *id) 2096 { /* NOT irq */ 2097 struct vub300_mmc_host *vub300; 2098 struct usb_host_interface *iface_desc; 2099 struct usb_device *udev = usb_get_dev(interface_to_usbdev(interface)); 2100 int i; 2101 int retval = -ENOMEM; 2102 struct urb *command_out_urb; 2103 struct urb *command_res_urb; 2104 struct mmc_host *mmc; 2105 char manufacturer[48]; 2106 char product[32]; 2107 char serial_number[32]; 2108 usb_string(udev, udev->descriptor.iManufacturer, manufacturer, 2109 sizeof(manufacturer)); 2110 usb_string(udev, udev->descriptor.iProduct, product, sizeof(product)); 2111 usb_string(udev, udev->descriptor.iSerialNumber, serial_number, 2112 sizeof(serial_number)); 2113 dev_info(&udev->dev, "probing VID:PID(%04X:%04X) %s %s %s\n", 2114 udev->descriptor.idVendor, udev->descriptor.idProduct, 2115 manufacturer, product, serial_number); 2116 command_out_urb = usb_alloc_urb(0, GFP_KERNEL); 2117 if (!command_out_urb) { 2118 retval = -ENOMEM; 2119 dev_err(&udev->dev, "not enough memory for command_out_urb\n"); 2120 goto error0; 2121 } 2122 command_res_urb = usb_alloc_urb(0, GFP_KERNEL); 2123 if (!command_res_urb) { 2124 retval = -ENOMEM; 2125 dev_err(&udev->dev, "not enough memory for command_res_urb\n"); 2126 goto error1; 2127 } 2128 /* this also allocates memory for our VUB300 mmc host device */ 2129 mmc = mmc_alloc_host(sizeof(struct vub300_mmc_host), &udev->dev); 2130 if (!mmc) { 2131 retval = -ENOMEM; 2132 dev_err(&udev->dev, "not enough memory for the mmc_host\n"); 2133 goto error4; 2134 } 2135 /* MMC core transfer sizes tunable parameters */ 2136 mmc->caps = 0; 2137 if (!force_1_bit_data_xfers) 2138 mmc->caps |= MMC_CAP_4_BIT_DATA; 2139 if (!force_polling_for_irqs) 2140 mmc->caps |= MMC_CAP_SDIO_IRQ; 2141 mmc->caps &= ~MMC_CAP_NEEDS_POLL; 2142 /* 2143 * MMC_CAP_NEEDS_POLL causes core.c:mmc_rescan() to poll 2144 * for devices which results in spurious CMD7's being 2145 * issued which stops some SDIO cards from working 2146 */ 2147 if (limit_speed_to_24_MHz) { 2148 mmc->caps |= MMC_CAP_MMC_HIGHSPEED; 2149 mmc->caps |= MMC_CAP_SD_HIGHSPEED; 2150 mmc->f_max = 24000000; 2151 dev_info(&udev->dev, "limiting SDIO speed to 24_MHz\n"); 2152 } else { 2153 mmc->caps |= MMC_CAP_MMC_HIGHSPEED; 2154 mmc->caps |= MMC_CAP_SD_HIGHSPEED; 2155 mmc->f_max = 48000000; 2156 } 2157 mmc->f_min = 200000; 2158 mmc->max_blk_count = 511; 2159 mmc->max_blk_size = 512; 2160 mmc->max_segs = 128; 2161 if (force_max_req_size) 2162 mmc->max_req_size = force_max_req_size * 1024; 2163 else 2164 mmc->max_req_size = 64 * 1024; 2165 mmc->max_seg_size = mmc->max_req_size; 2166 mmc->ocr_avail = 0; 2167 mmc->ocr_avail |= MMC_VDD_165_195; 2168 mmc->ocr_avail |= MMC_VDD_20_21; 2169 mmc->ocr_avail |= MMC_VDD_21_22; 2170 mmc->ocr_avail |= MMC_VDD_22_23; 2171 mmc->ocr_avail |= MMC_VDD_23_24; 2172 mmc->ocr_avail |= MMC_VDD_24_25; 2173 mmc->ocr_avail |= MMC_VDD_25_26; 2174 mmc->ocr_avail |= MMC_VDD_26_27; 2175 mmc->ocr_avail |= MMC_VDD_27_28; 2176 mmc->ocr_avail |= MMC_VDD_28_29; 2177 mmc->ocr_avail |= MMC_VDD_29_30; 2178 mmc->ocr_avail |= MMC_VDD_30_31; 2179 mmc->ocr_avail |= MMC_VDD_31_32; 2180 mmc->ocr_avail |= MMC_VDD_32_33; 2181 mmc->ocr_avail |= MMC_VDD_33_34; 2182 mmc->ocr_avail |= MMC_VDD_34_35; 2183 mmc->ocr_avail |= MMC_VDD_35_36; 2184 mmc->ops = &vub300_mmc_ops; 2185 vub300 = mmc_priv(mmc); 2186 vub300->mmc = mmc; 2187 vub300->card_powered = 0; 2188 vub300->bus_width = 0; 2189 vub300->cmnd.head.block_size[0] = 0x00; 2190 vub300->cmnd.head.block_size[1] = 0x00; 2191 vub300->app_spec = 0; 2192 mutex_init(&vub300->cmd_mutex); 2193 mutex_init(&vub300->irq_mutex); 2194 vub300->command_out_urb = command_out_urb; 2195 vub300->command_res_urb = command_res_urb; 2196 vub300->usb_timed_out = 0; 2197 vub300->dynamic_register_count = 0; 2198 2199 for (i = 0; i < ARRAY_SIZE(vub300->fn); i++) { 2200 vub300->fn[i].offload_point = 0; 2201 vub300->fn[i].offload_count = 0; 2202 } 2203 2204 vub300->total_offload_count = 0; 2205 vub300->irq_enabled = 0; 2206 vub300->irq_disabled = 0; 2207 vub300->irqs_queued = 0; 2208 2209 for (i = 0; i < ARRAY_SIZE(vub300->sdio_register); i++) 2210 vub300->sdio_register[i++].activate = 0; 2211 2212 vub300->udev = udev; 2213 vub300->interface = interface; 2214 vub300->cmnd_res_ep = 0; 2215 vub300->cmnd_out_ep = 0; 2216 vub300->data_inp_ep = 0; 2217 vub300->data_out_ep = 0; 2218 2219 for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++) 2220 vub300->fbs[i] = 512; 2221 2222 /* 2223 * set up the endpoint information 2224 * 2225 * use the first pair of bulk-in and bulk-out 2226 * endpoints for Command/Response+Interrupt 2227 * 2228 * use the second pair of bulk-in and bulk-out 2229 * endpoints for Data In/Out 2230 */ 2231 vub300->large_usb_packets = 0; 2232 iface_desc = interface->cur_altsetting; 2233 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 2234 struct usb_endpoint_descriptor *endpoint = 2235 &iface_desc->endpoint[i].desc; 2236 dev_info(&vub300->udev->dev, 2237 "vub300 testing %s EndPoint(%d) %02X\n", 2238 usb_endpoint_is_bulk_in(endpoint) ? "BULK IN" : 2239 usb_endpoint_is_bulk_out(endpoint) ? "BULK OUT" : 2240 "UNKNOWN", i, endpoint->bEndpointAddress); 2241 if (endpoint->wMaxPacketSize > 64) 2242 vub300->large_usb_packets = 1; 2243 if (usb_endpoint_is_bulk_in(endpoint)) { 2244 if (!vub300->cmnd_res_ep) { 2245 vub300->cmnd_res_ep = 2246 endpoint->bEndpointAddress; 2247 } else if (!vub300->data_inp_ep) { 2248 vub300->data_inp_ep = 2249 endpoint->bEndpointAddress; 2250 } else { 2251 dev_warn(&vub300->udev->dev, 2252 "ignoring" 2253 " unexpected bulk_in endpoint"); 2254 } 2255 } else if (usb_endpoint_is_bulk_out(endpoint)) { 2256 if (!vub300->cmnd_out_ep) { 2257 vub300->cmnd_out_ep = 2258 endpoint->bEndpointAddress; 2259 } else if (!vub300->data_out_ep) { 2260 vub300->data_out_ep = 2261 endpoint->bEndpointAddress; 2262 } else { 2263 dev_warn(&vub300->udev->dev, 2264 "ignoring" 2265 " unexpected bulk_out endpoint"); 2266 } 2267 } else { 2268 dev_warn(&vub300->udev->dev, 2269 "vub300 ignoring EndPoint(%d) %02X", i, 2270 endpoint->bEndpointAddress); 2271 } 2272 } 2273 if (vub300->cmnd_res_ep && vub300->cmnd_out_ep && 2274 vub300->data_inp_ep && vub300->data_out_ep) { 2275 dev_info(&vub300->udev->dev, 2276 "vub300 %s packets" 2277 " using EndPoints %02X %02X %02X %02X\n", 2278 vub300->large_usb_packets ? "LARGE" : "SMALL", 2279 vub300->cmnd_out_ep, vub300->cmnd_res_ep, 2280 vub300->data_out_ep, vub300->data_inp_ep); 2281 /* we have the expected EndPoints */ 2282 } else { 2283 dev_err(&vub300->udev->dev, 2284 "Could not find two sets of bulk-in/out endpoint pairs\n"); 2285 retval = -EINVAL; 2286 goto error5; 2287 } 2288 retval = 2289 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0), 2290 GET_HC_INF0, 2291 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2292 0x0000, 0x0000, &vub300->hc_info, 2293 sizeof(vub300->hc_info), HZ); 2294 if (retval < 0) 2295 goto error5; 2296 retval = 2297 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0), 2298 SET_ROM_WAIT_STATES, 2299 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2300 firmware_rom_wait_states, 0x0000, NULL, 0, HZ); 2301 if (retval < 0) 2302 goto error5; 2303 dev_info(&vub300->udev->dev, 2304 "operating_mode = %s %s %d MHz %s %d byte USB packets\n", 2305 (mmc->caps & MMC_CAP_SDIO_IRQ) ? "IRQs" : "POLL", 2306 (mmc->caps & MMC_CAP_4_BIT_DATA) ? "4-bit" : "1-bit", 2307 mmc->f_max / 1000000, 2308 pad_input_to_usb_pkt ? "padding input data to" : "with", 2309 vub300->large_usb_packets ? 512 : 64); 2310 retval = 2311 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0), 2312 GET_SYSTEM_PORT_STATUS, 2313 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 2314 0x0000, 0x0000, &vub300->system_port_status, 2315 sizeof(vub300->system_port_status), HZ); 2316 if (retval < 0) { 2317 goto error4; 2318 } else if (sizeof(vub300->system_port_status) == retval) { 2319 vub300->card_present = 2320 (0x0001 & vub300->system_port_status.port_flags) ? 1 : 0; 2321 vub300->read_only = 2322 (0x0010 & vub300->system_port_status.port_flags) ? 1 : 0; 2323 } else { 2324 goto error4; 2325 } 2326 usb_set_intfdata(interface, vub300); 2327 INIT_DELAYED_WORK(&vub300->pollwork, vub300_pollwork_thread); 2328 INIT_WORK(&vub300->cmndwork, vub300_cmndwork_thread); 2329 INIT_WORK(&vub300->deadwork, vub300_deadwork_thread); 2330 kref_init(&vub300->kref); 2331 init_timer(&vub300->sg_transfer_timer); 2332 vub300->sg_transfer_timer.data = (unsigned long)vub300; 2333 vub300->sg_transfer_timer.function = vub300_sg_timed_out; 2334 kref_get(&vub300->kref); 2335 init_timer(&vub300->inactivity_timer); 2336 vub300->inactivity_timer.data = (unsigned long)vub300; 2337 vub300->inactivity_timer.function = vub300_inactivity_timer_expired; 2338 vub300->inactivity_timer.expires = jiffies + HZ; 2339 add_timer(&vub300->inactivity_timer); 2340 if (vub300->card_present) 2341 dev_info(&vub300->udev->dev, 2342 "USB vub300 remote SDIO host controller[%d]" 2343 "connected with SD/SDIO card inserted\n", 2344 interface_to_InterfaceNumber(interface)); 2345 else 2346 dev_info(&vub300->udev->dev, 2347 "USB vub300 remote SDIO host controller[%d]" 2348 "connected with no SD/SDIO card inserted\n", 2349 interface_to_InterfaceNumber(interface)); 2350 mmc_add_host(mmc); 2351 return 0; 2352 error5: 2353 mmc_free_host(mmc); 2354 /* 2355 * and hence also frees vub300 2356 * which is contained at the end of struct mmc 2357 */ 2358 error4: 2359 usb_free_urb(command_res_urb); 2360 error1: 2361 usb_free_urb(command_out_urb); 2362 error0: 2363 usb_put_dev(udev); 2364 return retval; 2365 } 2366 2367 static void vub300_disconnect(struct usb_interface *interface) 2368 { /* NOT irq */ 2369 struct vub300_mmc_host *vub300 = usb_get_intfdata(interface); 2370 if (!vub300 || !vub300->mmc) { 2371 return; 2372 } else { 2373 struct mmc_host *mmc = vub300->mmc; 2374 if (!vub300->mmc) { 2375 return; 2376 } else { 2377 int ifnum = interface_to_InterfaceNumber(interface); 2378 usb_set_intfdata(interface, NULL); 2379 /* prevent more I/O from starting */ 2380 vub300->interface = NULL; 2381 kref_put(&vub300->kref, vub300_delete); 2382 mmc_remove_host(mmc); 2383 pr_info("USB vub300 remote SDIO host controller[%d]" 2384 " now disconnected", ifnum); 2385 return; 2386 } 2387 } 2388 } 2389 2390 #ifdef CONFIG_PM 2391 static int vub300_suspend(struct usb_interface *intf, pm_message_t message) 2392 { 2393 return 0; 2394 } 2395 2396 static int vub300_resume(struct usb_interface *intf) 2397 { 2398 return 0; 2399 } 2400 #else 2401 #define vub300_suspend NULL 2402 #define vub300_resume NULL 2403 #endif 2404 static int vub300_pre_reset(struct usb_interface *intf) 2405 { /* NOT irq */ 2406 struct vub300_mmc_host *vub300 = usb_get_intfdata(intf); 2407 mutex_lock(&vub300->cmd_mutex); 2408 return 0; 2409 } 2410 2411 static int vub300_post_reset(struct usb_interface *intf) 2412 { /* NOT irq */ 2413 struct vub300_mmc_host *vub300 = usb_get_intfdata(intf); 2414 /* we are sure no URBs are active - no locking needed */ 2415 vub300->errors = -EPIPE; 2416 mutex_unlock(&vub300->cmd_mutex); 2417 return 0; 2418 } 2419 2420 static struct usb_driver vub300_driver = { 2421 .name = "vub300", 2422 .probe = vub300_probe, 2423 .disconnect = vub300_disconnect, 2424 .suspend = vub300_suspend, 2425 .resume = vub300_resume, 2426 .pre_reset = vub300_pre_reset, 2427 .post_reset = vub300_post_reset, 2428 .id_table = vub300_table, 2429 .supports_autosuspend = 1, 2430 }; 2431 2432 static int __init vub300_init(void) 2433 { /* NOT irq */ 2434 int result; 2435 2436 pr_info("VUB300 Driver rom wait states = %02X irqpoll timeout = %04X", 2437 firmware_rom_wait_states, 0x0FFFF & firmware_irqpoll_timeout); 2438 cmndworkqueue = create_singlethread_workqueue("kvub300c"); 2439 if (!cmndworkqueue) { 2440 pr_err("not enough memory for the REQUEST workqueue"); 2441 result = -ENOMEM; 2442 goto out1; 2443 } 2444 pollworkqueue = create_singlethread_workqueue("kvub300p"); 2445 if (!pollworkqueue) { 2446 pr_err("not enough memory for the IRQPOLL workqueue"); 2447 result = -ENOMEM; 2448 goto out2; 2449 } 2450 deadworkqueue = create_singlethread_workqueue("kvub300d"); 2451 if (!deadworkqueue) { 2452 pr_err("not enough memory for the EXPIRED workqueue"); 2453 result = -ENOMEM; 2454 goto out3; 2455 } 2456 result = usb_register(&vub300_driver); 2457 if (result) { 2458 pr_err("usb_register failed. Error number %d", result); 2459 goto out4; 2460 } 2461 return 0; 2462 out4: 2463 destroy_workqueue(deadworkqueue); 2464 out3: 2465 destroy_workqueue(pollworkqueue); 2466 out2: 2467 destroy_workqueue(cmndworkqueue); 2468 out1: 2469 return result; 2470 } 2471 2472 static void __exit vub300_exit(void) 2473 { 2474 usb_deregister(&vub300_driver); 2475 flush_workqueue(cmndworkqueue); 2476 flush_workqueue(pollworkqueue); 2477 flush_workqueue(deadworkqueue); 2478 destroy_workqueue(cmndworkqueue); 2479 destroy_workqueue(pollworkqueue); 2480 destroy_workqueue(deadworkqueue); 2481 } 2482 2483 module_init(vub300_init); 2484 module_exit(vub300_exit); 2485 2486 MODULE_AUTHOR("Tony Olech <tony.olech@elandigitalsystems.com>"); 2487 MODULE_DESCRIPTION("VUB300 USB to SD/MMC/SDIO adapter driver"); 2488 MODULE_LICENSE("GPL"); 2489