Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1

Linux/drivers/mmc/host/vub300.c

  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; /* "" 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 

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