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perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / drivers / mmc / host / vub300.c
blob1fe68137a30f2dcf93fbe3eb5aa800caf08becde
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 const struct usb_device_id vub300_table[] = {
270 {USB_DEVICE(ELAN_VENDOR_ID, VUB300_PRODUCT_ID)},
271 {USB_DEVICE(VUB300_VENDOR_ID, VUB300_PRODUCT_ID)},
272 {} /* Terminating entry */
273 };
274 MODULE_DEVICE_TABLE(usb, vub300_table);
275
276 static struct workqueue_struct *cmndworkqueue;
277 static struct workqueue_struct *pollworkqueue;
278 static struct workqueue_struct *deadworkqueue;
279
280 static inline int interface_to_InterfaceNumber(struct usb_interface *interface)
281 {
282 if (!interface)
283 return -1;
284 if (!interface->cur_altsetting)
285 return -1;
286 return interface->cur_altsetting->desc.bInterfaceNumber;
287 }
288
289 struct sdio_register {
290 unsigned func_num:3;
291 unsigned sdio_reg:17;
292 unsigned activate:1;
293 unsigned prepared:1;
294 unsigned regvalue:8;
295 unsigned response:8;
296 unsigned sparebit:26;
297 };
298
299 struct vub300_mmc_host {
300 struct usb_device *udev;
301 struct usb_interface *interface;
302 struct kref kref;
303 struct mutex cmd_mutex;
304 struct mutex irq_mutex;
305 char vub_name[3 + (9 * 8) + 4 + 1]; /* max of 7 sdio fn's */
306 u8 cmnd_out_ep; /* EndPoint for commands */
307 u8 cmnd_res_ep; /* EndPoint for responses */
308 u8 data_out_ep; /* EndPoint for out data */
309 u8 data_inp_ep; /* EndPoint for inp data */
310 bool card_powered;
311 bool card_present;
312 bool read_only;
313 bool large_usb_packets;
314 bool app_spec; /* ApplicationSpecific */
315 bool irq_enabled; /* by the MMC CORE */
316 bool irq_disabled; /* in the firmware */
317 unsigned bus_width:4;
318 u8 total_offload_count;
319 u8 dynamic_register_count;
320 u8 resp_len;
321 u32 datasize;
322 int errors;
323 int usb_transport_fail;
324 int usb_timed_out;
325 int irqs_queued;
326 struct sdio_register sdio_register[16];
327 struct offload_interrupt_function_register {
328 #define MAXREGBITS 4
329 #define MAXREGS (1<<MAXREGBITS)
330 #define MAXREGMASK (MAXREGS-1)
331 u8 offload_count;
332 u32 offload_point;
333 struct offload_registers_access reg[MAXREGS];
334 } fn[8];
335 u16 fbs[8]; /* Function Block Size */
336 struct mmc_command *cmd;
337 struct mmc_request *req;
338 struct mmc_data *data;
339 struct mmc_host *mmc;
340 struct urb *urb;
341 struct urb *command_out_urb;
342 struct urb *command_res_urb;
343 struct completion command_complete;
344 struct completion irqpoll_complete;
345 union sd_command cmnd;
346 union sd_response resp;
347 struct timer_list sg_transfer_timer;
348 struct usb_sg_request sg_request;
349 struct timer_list inactivity_timer;
350 struct work_struct deadwork;
351 struct work_struct cmndwork;
352 struct delayed_work pollwork;
353 struct host_controller_info hc_info;
354 struct sd_status_header system_port_status;
355 u8 padded_buffer[64];
356 };
357
358 #define kref_to_vub300_mmc_host(d) container_of(d, struct vub300_mmc_host, kref)
359 #define SET_TRANSFER_PSEUDOCODE 21
360 #define SET_INTERRUPT_PSEUDOCODE 20
361 #define SET_FAILURE_MODE 18
362 #define SET_ROM_WAIT_STATES 16
363 #define SET_IRQ_ENABLE 13
364 #define SET_CLOCK_SPEED 11
365 #define SET_FUNCTION_BLOCK_SIZE 9
366 #define SET_SD_DATA_MODE 6
367 #define SET_SD_POWER 4
368 #define ENTER_DFU_MODE 3
369 #define GET_HC_INF0 1
370 #define GET_SYSTEM_PORT_STATUS 0
371
372 static void vub300_delete(struct kref *kref)
373 { /* kref callback - softirq */
374 struct vub300_mmc_host *vub300 = kref_to_vub300_mmc_host(kref);
375 struct mmc_host *mmc = vub300->mmc;
376 usb_free_urb(vub300->command_out_urb);
377 vub300->command_out_urb = NULL;
378 usb_free_urb(vub300->command_res_urb);
379 vub300->command_res_urb = NULL;
380 usb_put_dev(vub300->udev);
381 mmc_free_host(mmc);
382 /*
383 * and hence also frees vub300
384 * which is contained at the end of struct mmc
385 */
386 }
387
388 static void vub300_queue_cmnd_work(struct vub300_mmc_host *vub300)
389 {
390 kref_get(&vub300->kref);
391 if (queue_work(cmndworkqueue, &vub300->cmndwork)) {
392 /*
393 * then the cmndworkqueue was not previously
394 * running and the above get ref is obvious
395 * required and will be put when the thread
396 * terminates by a specific call
397 */
398 } else {
399 /*
400 * the cmndworkqueue was already running from
401 * a previous invocation and thus to keep the
402 * kref counts correct we must undo the get
403 */
404 kref_put(&vub300->kref, vub300_delete);
405 }
406 }
407
408 static void vub300_queue_poll_work(struct vub300_mmc_host *vub300, int delay)
409 {
410 kref_get(&vub300->kref);
411 if (queue_delayed_work(pollworkqueue, &vub300->pollwork, delay)) {
412 /*
413 * then the pollworkqueue was not previously
414 * running and the above get ref is obvious
415 * required and will be put when the thread
416 * terminates by a specific call
417 */
418 } else {
419 /*
420 * the pollworkqueue was already running from
421 * a previous invocation and thus to keep the
422 * kref counts correct we must undo the get
423 */
424 kref_put(&vub300->kref, vub300_delete);
425 }
426 }
427
428 static void vub300_queue_dead_work(struct vub300_mmc_host *vub300)
429 {
430 kref_get(&vub300->kref);
431 if (queue_work(deadworkqueue, &vub300->deadwork)) {
432 /*
433 * then the deadworkqueue was not previously
434 * running and the above get ref is obvious
435 * required and will be put when the thread
436 * terminates by a specific call
437 */
438 } else {
439 /*
440 * the deadworkqueue was already running from
441 * a previous invocation and thus to keep the
442 * kref counts correct we must undo the get
443 */
444 kref_put(&vub300->kref, vub300_delete);
445 }
446 }
447
448 static void irqpoll_res_completed(struct urb *urb)
449 { /* urb completion handler - hardirq */
450 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
451 if (urb->status)
452 vub300->usb_transport_fail = urb->status;
453 complete(&vub300->irqpoll_complete);
454 }
455
456 static void irqpoll_out_completed(struct urb *urb)
457 { /* urb completion handler - hardirq */
458 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
459 if (urb->status) {
460 vub300->usb_transport_fail = urb->status;
461 complete(&vub300->irqpoll_complete);
462 return;
463 } else {
464 int ret;
465 unsigned int pipe =
466 usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep);
467 usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe,
468 &vub300->resp, sizeof(vub300->resp),
469 irqpoll_res_completed, vub300);
470 vub300->command_res_urb->actual_length = 0;
471 ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC);
472 if (ret) {
473 vub300->usb_transport_fail = ret;
474 complete(&vub300->irqpoll_complete);
475 }
476 return;
477 }
478 }
479
480 static void send_irqpoll(struct vub300_mmc_host *vub300)
481 {
482 /* cmd_mutex is held by vub300_pollwork_thread */
483 int retval;
484 int timeout = 0xFFFF & (0x0001FFFF - firmware_irqpoll_timeout);
485 vub300->cmnd.poll.header_size = 22;
486 vub300->cmnd.poll.header_type = 1;
487 vub300->cmnd.poll.port_number = 0;
488 vub300->cmnd.poll.command_type = 2;
489 vub300->cmnd.poll.poll_timeout_lsb = 0xFF & (unsigned)timeout;
490 vub300->cmnd.poll.poll_timeout_msb = 0xFF & (unsigned)(timeout >> 8);
491 usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev,
492 usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep)
493 , &vub300->cmnd, sizeof(vub300->cmnd)
494 , irqpoll_out_completed, vub300);
495 retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL);
496 if (0 > retval) {
497 vub300->usb_transport_fail = retval;
498 vub300_queue_poll_work(vub300, 1);
499 complete(&vub300->irqpoll_complete);
500 return;
501 } else {
502 return;
503 }
504 }
505
506 static void new_system_port_status(struct vub300_mmc_host *vub300)
507 {
508 int old_card_present = vub300->card_present;
509 int new_card_present =
510 (0x0001 & vub300->system_port_status.port_flags) ? 1 : 0;
511 vub300->read_only =
512 (0x0010 & vub300->system_port_status.port_flags) ? 1 : 0;
513 if (new_card_present && !old_card_present) {
514 dev_info(&vub300->udev->dev, "card just inserted\n");
515 vub300->card_present = 1;
516 vub300->bus_width = 0;
517 if (disable_offload_processing)
518 strncpy(vub300->vub_name, "EMPTY Processing Disabled",
519 sizeof(vub300->vub_name));
520 else
521 vub300->vub_name[0] = 0;
522 mmc_detect_change(vub300->mmc, 1);
523 } else if (!new_card_present && old_card_present) {
524 dev_info(&vub300->udev->dev, "card just ejected\n");
525 vub300->card_present = 0;
526 mmc_detect_change(vub300->mmc, 0);
527 } else {
528 /* no change */
529 }
530 }
531
532 static void __add_offloaded_reg_to_fifo(struct vub300_mmc_host *vub300,
533 struct offload_registers_access
534 *register_access, u8 func)
535 {
536 u8 r = vub300->fn[func].offload_point + vub300->fn[func].offload_count;
537 memcpy(&vub300->fn[func].reg[MAXREGMASK & r], register_access,
538 sizeof(struct offload_registers_access));
539 vub300->fn[func].offload_count += 1;
540 vub300->total_offload_count += 1;
541 }
542
543 static void add_offloaded_reg(struct vub300_mmc_host *vub300,
544 struct offload_registers_access *register_access)
545 {
546 u32 Register = ((0x03 & register_access->command_byte[0]) << 15)
547 | ((0xFF & register_access->command_byte[1]) << 7)
548 | ((0xFE & register_access->command_byte[2]) >> 1);
549 u8 func = ((0x70 & register_access->command_byte[0]) >> 4);
550 u8 regs = vub300->dynamic_register_count;
551 u8 i = 0;
552 while (0 < regs-- && 1 == vub300->sdio_register[i].activate) {
553 if (vub300->sdio_register[i].func_num == func &&
554 vub300->sdio_register[i].sdio_reg == Register) {
555 if (vub300->sdio_register[i].prepared == 0)
556 vub300->sdio_register[i].prepared = 1;
557 vub300->sdio_register[i].response =
558 register_access->Respond_Byte[2];
559 vub300->sdio_register[i].regvalue =
560 register_access->Respond_Byte[3];
561 return;
562 } else {
563 i += 1;
564 continue;
565 }
566 }
567 __add_offloaded_reg_to_fifo(vub300, register_access, func);
568 }
569
570 static void check_vub300_port_status(struct vub300_mmc_host *vub300)
571 {
572 /*
573 * cmd_mutex is held by vub300_pollwork_thread,
574 * vub300_deadwork_thread or vub300_cmndwork_thread
575 */
576 int retval;
577 retval =
578 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
579 GET_SYSTEM_PORT_STATUS,
580 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
581 0x0000, 0x0000, &vub300->system_port_status,
582 sizeof(vub300->system_port_status), HZ);
583 if (sizeof(vub300->system_port_status) == retval)
584 new_system_port_status(vub300);
585 }
586
587 static void __vub300_irqpoll_response(struct vub300_mmc_host *vub300)
588 {
589 /* cmd_mutex is held by vub300_pollwork_thread */
590 if (vub300->command_res_urb->actual_length == 0)
591 return;
592
593 switch (vub300->resp.common.header_type) {
594 case RESPONSE_INTERRUPT:
595 mutex_lock(&vub300->irq_mutex);
596 if (vub300->irq_enabled)
597 mmc_signal_sdio_irq(vub300->mmc);
598 else
599 vub300->irqs_queued += 1;
600 vub300->irq_disabled = 1;
601 mutex_unlock(&vub300->irq_mutex);
602 break;
603 case RESPONSE_ERROR:
604 if (vub300->resp.error.error_code == SD_ERROR_NO_DEVICE)
605 check_vub300_port_status(vub300);
606 break;
607 case RESPONSE_STATUS:
608 vub300->system_port_status = vub300->resp.status;
609 new_system_port_status(vub300);
610 if (!vub300->card_present)
611 vub300_queue_poll_work(vub300, HZ / 5);
612 break;
613 case RESPONSE_IRQ_DISABLED:
614 {
615 int offloaded_data_length = vub300->resp.common.header_size - 3;
616 int register_count = offloaded_data_length >> 3;
617 int ri = 0;
618 while (register_count--) {
619 add_offloaded_reg(vub300, &vub300->resp.irq.reg[ri]);
620 ri += 1;
621 }
622 mutex_lock(&vub300->irq_mutex);
623 if (vub300->irq_enabled)
624 mmc_signal_sdio_irq(vub300->mmc);
625 else
626 vub300->irqs_queued += 1;
627 vub300->irq_disabled = 1;
628 mutex_unlock(&vub300->irq_mutex);
629 break;
630 }
631 case RESPONSE_IRQ_ENABLED:
632 {
633 int offloaded_data_length = vub300->resp.common.header_size - 3;
634 int register_count = offloaded_data_length >> 3;
635 int ri = 0;
636 while (register_count--) {
637 add_offloaded_reg(vub300, &vub300->resp.irq.reg[ri]);
638 ri += 1;
639 }
640 mutex_lock(&vub300->irq_mutex);
641 if (vub300->irq_enabled)
642 mmc_signal_sdio_irq(vub300->mmc);
643 else
644 vub300->irqs_queued += 1;
645 vub300->irq_disabled = 0;
646 mutex_unlock(&vub300->irq_mutex);
647 break;
648 }
649 case RESPONSE_NO_INTERRUPT:
650 vub300_queue_poll_work(vub300, 1);
651 break;
652 default:
653 break;
654 }
655 }
656
657 static void __do_poll(struct vub300_mmc_host *vub300)
658 {
659 /* cmd_mutex is held by vub300_pollwork_thread */
660 unsigned long commretval;
661 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
662 init_completion(&vub300->irqpoll_complete);
663 send_irqpoll(vub300);
664 commretval = wait_for_completion_timeout(&vub300->irqpoll_complete,
665 msecs_to_jiffies(500));
666 if (vub300->usb_transport_fail) {
667 /* no need to do anything */
668 } else if (commretval == 0) {
669 vub300->usb_timed_out = 1;
670 usb_kill_urb(vub300->command_out_urb);
671 usb_kill_urb(vub300->command_res_urb);
672 } else { /* commretval > 0 */
673 __vub300_irqpoll_response(vub300);
674 }
675 }
676
677 /* this thread runs only when the driver
678 * is trying to poll the device for an IRQ
679 */
680 static void vub300_pollwork_thread(struct work_struct *work)
681 { /* NOT irq */
682 struct vub300_mmc_host *vub300 = container_of(work,
683 struct vub300_mmc_host, pollwork.work);
684 if (!vub300->interface) {
685 kref_put(&vub300->kref, vub300_delete);
686 return;
687 }
688 mutex_lock(&vub300->cmd_mutex);
689 if (vub300->cmd) {
690 vub300_queue_poll_work(vub300, 1);
691 } else if (!vub300->card_present) {
692 /* no need to do anything */
693 } else { /* vub300->card_present */
694 mutex_lock(&vub300->irq_mutex);
695 if (!vub300->irq_enabled) {
696 mutex_unlock(&vub300->irq_mutex);
697 } else if (vub300->irqs_queued) {
698 vub300->irqs_queued -= 1;
699 mmc_signal_sdio_irq(vub300->mmc);
700 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
701 mutex_unlock(&vub300->irq_mutex);
702 } else { /* NOT vub300->irqs_queued */
703 mutex_unlock(&vub300->irq_mutex);
704 __do_poll(vub300);
705 }
706 }
707 mutex_unlock(&vub300->cmd_mutex);
708 kref_put(&vub300->kref, vub300_delete);
709 }
710
711 static void vub300_deadwork_thread(struct work_struct *work)
712 { /* NOT irq */
713 struct vub300_mmc_host *vub300 =
714 container_of(work, struct vub300_mmc_host, deadwork);
715 if (!vub300->interface) {
716 kref_put(&vub300->kref, vub300_delete);
717 return;
718 }
719 mutex_lock(&vub300->cmd_mutex);
720 if (vub300->cmd) {
721 /*
722 * a command got in as the inactivity
723 * timer expired - so we just let the
724 * processing of the command show if
725 * the device is dead
726 */
727 } else if (vub300->card_present) {
728 check_vub300_port_status(vub300);
729 } else if (vub300->mmc && vub300->mmc->card) {
730 /*
731 * the MMC core must not have responded
732 * to the previous indication - lets
733 * hope that it eventually does so we
734 * will just ignore this for now
735 */
736 } else {
737 check_vub300_port_status(vub300);
738 }
739 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
740 mutex_unlock(&vub300->cmd_mutex);
741 kref_put(&vub300->kref, vub300_delete);
742 }
743
744 static void vub300_inactivity_timer_expired(struct timer_list *t)
745 { /* softirq */
746 struct vub300_mmc_host *vub300 = from_timer(vub300, t,
747 inactivity_timer);
748 if (!vub300->interface) {
749 kref_put(&vub300->kref, vub300_delete);
750 } else if (vub300->cmd) {
751 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
752 } else {
753 vub300_queue_dead_work(vub300);
754 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
755 }
756 }
757
758 static int vub300_response_error(u8 error_code)
759 {
760 switch (error_code) {
761 case SD_ERROR_PIO_TIMEOUT:
762 case SD_ERROR_1BIT_TIMEOUT:
763 case SD_ERROR_4BIT_TIMEOUT:
764 return -ETIMEDOUT;
765 case SD_ERROR_STAT_DATA:
766 case SD_ERROR_OVERRUN:
767 case SD_ERROR_STAT_CMD:
768 case SD_ERROR_STAT_CMD_TIMEOUT:
769 case SD_ERROR_SDCRDY_STUCK:
770 case SD_ERROR_UNHANDLED:
771 case SD_ERROR_1BIT_CRC_WRONG:
772 case SD_ERROR_4BIT_CRC_WRONG:
773 case SD_ERROR_1BIT_CRC_ERROR:
774 case SD_ERROR_4BIT_CRC_ERROR:
775 case SD_ERROR_NO_CMD_ENDBIT:
776 case SD_ERROR_NO_1BIT_DATEND:
777 case SD_ERROR_NO_4BIT_DATEND:
778 case SD_ERROR_1BIT_DATA_TIMEOUT:
779 case SD_ERROR_4BIT_DATA_TIMEOUT:
780 case SD_ERROR_1BIT_UNEXPECTED_TIMEOUT:
781 case SD_ERROR_4BIT_UNEXPECTED_TIMEOUT:
782 return -EILSEQ;
783 case 33:
784 return -EILSEQ;
785 case SD_ERROR_ILLEGAL_COMMAND:
786 return -EINVAL;
787 case SD_ERROR_NO_DEVICE:
788 return -ENOMEDIUM;
789 default:
790 return -ENODEV;
791 }
792 }
793
794 static void command_res_completed(struct urb *urb)
795 { /* urb completion handler - hardirq */
796 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
797 if (urb->status) {
798 /* we have to let the initiator handle the error */
799 } else if (vub300->command_res_urb->actual_length == 0) {
800 /*
801 * we have seen this happen once or twice and
802 * we suspect a buggy USB host controller
803 */
804 } else if (!vub300->data) {
805 /* this means that the command (typically CMD52) succeeded */
806 } else if (vub300->resp.common.header_type != 0x02) {
807 /*
808 * this is an error response from the VUB300 chip
809 * and we let the initiator handle it
810 */
811 } else if (vub300->urb) {
812 vub300->cmd->error =
813 vub300_response_error(vub300->resp.error.error_code);
814 usb_unlink_urb(vub300->urb);
815 } else {
816 vub300->cmd->error =
817 vub300_response_error(vub300->resp.error.error_code);
818 usb_sg_cancel(&vub300->sg_request);
819 }
820 complete(&vub300->command_complete); /* got_response_in */
821 }
822
823 static void command_out_completed(struct urb *urb)
824 { /* urb completion handler - hardirq */
825 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
826 if (urb->status) {
827 complete(&vub300->command_complete);
828 } else {
829 int ret;
830 unsigned int pipe =
831 usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep);
832 usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe,
833 &vub300->resp, sizeof(vub300->resp),
834 command_res_completed, vub300);
835 vub300->command_res_urb->actual_length = 0;
836 ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC);
837 if (ret == 0) {
838 /*
839 * the urb completion handler will call
840 * our completion handler
841 */
842 } else {
843 /*
844 * and thus we only call it directly
845 * when it will not be called
846 */
847 complete(&vub300->command_complete);
848 }
849 }
850 }
851
852 /*
853 * the STUFF bits are masked out for the comparisons
854 */
855 static void snoop_block_size_and_bus_width(struct vub300_mmc_host *vub300,
856 u32 cmd_arg)
857 {
858 if ((0xFBFFFE00 & cmd_arg) == 0x80022200)
859 vub300->fbs[1] = (cmd_arg << 8) | (0x00FF & vub300->fbs[1]);
860 else if ((0xFBFFFE00 & cmd_arg) == 0x80022000)
861 vub300->fbs[1] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[1]);
862 else if ((0xFBFFFE00 & cmd_arg) == 0x80042200)
863 vub300->fbs[2] = (cmd_arg << 8) | (0x00FF & vub300->fbs[2]);
864 else if ((0xFBFFFE00 & cmd_arg) == 0x80042000)
865 vub300->fbs[2] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[2]);
866 else if ((0xFBFFFE00 & cmd_arg) == 0x80062200)
867 vub300->fbs[3] = (cmd_arg << 8) | (0x00FF & vub300->fbs[3]);
868 else if ((0xFBFFFE00 & cmd_arg) == 0x80062000)
869 vub300->fbs[3] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[3]);
870 else if ((0xFBFFFE00 & cmd_arg) == 0x80082200)
871 vub300->fbs[4] = (cmd_arg << 8) | (0x00FF & vub300->fbs[4]);
872 else if ((0xFBFFFE00 & cmd_arg) == 0x80082000)
873 vub300->fbs[4] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[4]);
874 else if ((0xFBFFFE00 & cmd_arg) == 0x800A2200)
875 vub300->fbs[5] = (cmd_arg << 8) | (0x00FF & vub300->fbs[5]);
876 else if ((0xFBFFFE00 & cmd_arg) == 0x800A2000)
877 vub300->fbs[5] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[5]);
878 else if ((0xFBFFFE00 & cmd_arg) == 0x800C2200)
879 vub300->fbs[6] = (cmd_arg << 8) | (0x00FF & vub300->fbs[6]);
880 else if ((0xFBFFFE00 & cmd_arg) == 0x800C2000)
881 vub300->fbs[6] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[6]);
882 else if ((0xFBFFFE00 & cmd_arg) == 0x800E2200)
883 vub300->fbs[7] = (cmd_arg << 8) | (0x00FF & vub300->fbs[7]);
884 else if ((0xFBFFFE00 & cmd_arg) == 0x800E2000)
885 vub300->fbs[7] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[7]);
886 else if ((0xFBFFFE03 & cmd_arg) == 0x80000E00)
887 vub300->bus_width = 1;
888 else if ((0xFBFFFE03 & cmd_arg) == 0x80000E02)
889 vub300->bus_width = 4;
890 }
891
892 static void send_command(struct vub300_mmc_host *vub300)
893 {
894 /* cmd_mutex is held by vub300_cmndwork_thread */
895 struct mmc_command *cmd = vub300->cmd;
896 struct mmc_data *data = vub300->data;
897 int retval;
898 int i;
899 u8 response_type;
900 if (vub300->app_spec) {
901 switch (cmd->opcode) {
902 case 6:
903 response_type = SDRT_1;
904 vub300->resp_len = 6;
905 if (0x00000000 == (0x00000003 & cmd->arg))
906 vub300->bus_width = 1;
907 else if (0x00000002 == (0x00000003 & cmd->arg))
908 vub300->bus_width = 4;
909 else
910 dev_err(&vub300->udev->dev,
911 "unexpected ACMD6 bus_width=%d\n",
912 0x00000003 & cmd->arg);
913 break;
914 case 13:
915 response_type = SDRT_1;
916 vub300->resp_len = 6;
917 break;
918 case 22:
919 response_type = SDRT_1;
920 vub300->resp_len = 6;
921 break;
922 case 23:
923 response_type = SDRT_1;
924 vub300->resp_len = 6;
925 break;
926 case 41:
927 response_type = SDRT_3;
928 vub300->resp_len = 6;
929 break;
930 case 42:
931 response_type = SDRT_1;
932 vub300->resp_len = 6;
933 break;
934 case 51:
935 response_type = SDRT_1;
936 vub300->resp_len = 6;
937 break;
938 case 55:
939 response_type = SDRT_1;
940 vub300->resp_len = 6;
941 break;
942 default:
943 vub300->resp_len = 0;
944 cmd->error = -EINVAL;
945 complete(&vub300->command_complete);
946 return;
947 }
948 vub300->app_spec = 0;
949 } else {
950 switch (cmd->opcode) {
951 case 0:
952 response_type = SDRT_NONE;
953 vub300->resp_len = 0;
954 break;
955 case 1:
956 response_type = SDRT_3;
957 vub300->resp_len = 6;
958 break;
959 case 2:
960 response_type = SDRT_2;
961 vub300->resp_len = 17;
962 break;
963 case 3:
964 response_type = SDRT_6;
965 vub300->resp_len = 6;
966 break;
967 case 4:
968 response_type = SDRT_NONE;
969 vub300->resp_len = 0;
970 break;
971 case 5:
972 response_type = SDRT_4;
973 vub300->resp_len = 6;
974 break;
975 case 6:
976 response_type = SDRT_1;
977 vub300->resp_len = 6;
978 break;
979 case 7:
980 response_type = SDRT_1B;
981 vub300->resp_len = 6;
982 break;
983 case 8:
984 response_type = SDRT_7;
985 vub300->resp_len = 6;
986 break;
987 case 9:
988 response_type = SDRT_2;
989 vub300->resp_len = 17;
990 break;
991 case 10:
992 response_type = SDRT_2;
993 vub300->resp_len = 17;
994 break;
995 case 12:
996 response_type = SDRT_1B;
997 vub300->resp_len = 6;
998 break;
999 case 13:
1000 response_type = SDRT_1;
1001 vub300->resp_len = 6;
1002 break;
1003 case 15:
1004 response_type = SDRT_NONE;
1005 vub300->resp_len = 0;
1006 break;
1007 case 16:
1008 for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++)
1009 vub300->fbs[i] = 0xFFFF & cmd->arg;
1010 response_type = SDRT_1;
1011 vub300->resp_len = 6;
1012 break;
1013 case 17:
1014 case 18:
1015 case 24:
1016 case 25:
1017 case 27:
1018 response_type = SDRT_1;
1019 vub300->resp_len = 6;
1020 break;
1021 case 28:
1022 case 29:
1023 response_type = SDRT_1B;
1024 vub300->resp_len = 6;
1025 break;
1026 case 30:
1027 case 32:
1028 case 33:
1029 response_type = SDRT_1;
1030 vub300->resp_len = 6;
1031 break;
1032 case 38:
1033 response_type = SDRT_1B;
1034 vub300->resp_len = 6;
1035 break;
1036 case 42:
1037 response_type = SDRT_1;
1038 vub300->resp_len = 6;
1039 break;
1040 case 52:
1041 response_type = SDRT_5;
1042 vub300->resp_len = 6;
1043 snoop_block_size_and_bus_width(vub300, cmd->arg);
1044 break;
1045 case 53:
1046 response_type = SDRT_5;
1047 vub300->resp_len = 6;
1048 break;
1049 case 55:
1050 response_type = SDRT_1;
1051 vub300->resp_len = 6;
1052 vub300->app_spec = 1;
1053 break;
1054 case 56:
1055 response_type = SDRT_1;
1056 vub300->resp_len = 6;
1057 break;
1058 default:
1059 vub300->resp_len = 0;
1060 cmd->error = -EINVAL;
1061 complete(&vub300->command_complete);
1062 return;
1063 }
1064 }
1065 /*
1066 * it is a shame that we can not use "sizeof(struct sd_command_header)"
1067 * this is because the packet _must_ be padded to 64 bytes
1068 */
1069 vub300->cmnd.head.header_size = 20;
1070 vub300->cmnd.head.header_type = 0x00;
1071 vub300->cmnd.head.port_number = 0; /* "0" means port 1 */
1072 vub300->cmnd.head.command_type = 0x00; /* standard read command */
1073 vub300->cmnd.head.response_type = response_type;
1074 vub300->cmnd.head.command_index = cmd->opcode;
1075 vub300->cmnd.head.arguments[0] = cmd->arg >> 24;
1076 vub300->cmnd.head.arguments[1] = cmd->arg >> 16;
1077 vub300->cmnd.head.arguments[2] = cmd->arg >> 8;
1078 vub300->cmnd.head.arguments[3] = cmd->arg >> 0;
1079 if (cmd->opcode == 52) {
1080 int fn = 0x7 & (cmd->arg >> 28);
1081 vub300->cmnd.head.block_count[0] = 0;
1082 vub300->cmnd.head.block_count[1] = 0;
1083 vub300->cmnd.head.block_size[0] = (vub300->fbs[fn] >> 8) & 0xFF;
1084 vub300->cmnd.head.block_size[1] = (vub300->fbs[fn] >> 0) & 0xFF;
1085 vub300->cmnd.head.command_type = 0x00;
1086 vub300->cmnd.head.transfer_size[0] = 0;
1087 vub300->cmnd.head.transfer_size[1] = 0;
1088 vub300->cmnd.head.transfer_size[2] = 0;
1089 vub300->cmnd.head.transfer_size[3] = 0;
1090 } else if (!data) {
1091 vub300->cmnd.head.block_count[0] = 0;
1092 vub300->cmnd.head.block_count[1] = 0;
1093 vub300->cmnd.head.block_size[0] = (vub300->fbs[0] >> 8) & 0xFF;
1094 vub300->cmnd.head.block_size[1] = (vub300->fbs[0] >> 0) & 0xFF;
1095 vub300->cmnd.head.command_type = 0x00;
1096 vub300->cmnd.head.transfer_size[0] = 0;
1097 vub300->cmnd.head.transfer_size[1] = 0;
1098 vub300->cmnd.head.transfer_size[2] = 0;
1099 vub300->cmnd.head.transfer_size[3] = 0;
1100 } else if (cmd->opcode == 53) {
1101 int fn = 0x7 & (cmd->arg >> 28);
1102 if (0x08 & vub300->cmnd.head.arguments[0]) { /* BLOCK MODE */
1103 vub300->cmnd.head.block_count[0] =
1104 (data->blocks >> 8) & 0xFF;
1105 vub300->cmnd.head.block_count[1] =
1106 (data->blocks >> 0) & 0xFF;
1107 vub300->cmnd.head.block_size[0] =
1108 (data->blksz >> 8) & 0xFF;
1109 vub300->cmnd.head.block_size[1] =
1110 (data->blksz >> 0) & 0xFF;
1111 } else { /* BYTE MODE */
1112 vub300->cmnd.head.block_count[0] = 0;
1113 vub300->cmnd.head.block_count[1] = 0;
1114 vub300->cmnd.head.block_size[0] =
1115 (vub300->datasize >> 8) & 0xFF;
1116 vub300->cmnd.head.block_size[1] =
1117 (vub300->datasize >> 0) & 0xFF;
1118 }
1119 vub300->cmnd.head.command_type =
1120 (MMC_DATA_READ & data->flags) ? 0x00 : 0x80;
1121 vub300->cmnd.head.transfer_size[0] =
1122 (vub300->datasize >> 24) & 0xFF;
1123 vub300->cmnd.head.transfer_size[1] =
1124 (vub300->datasize >> 16) & 0xFF;
1125 vub300->cmnd.head.transfer_size[2] =
1126 (vub300->datasize >> 8) & 0xFF;
1127 vub300->cmnd.head.transfer_size[3] =
1128 (vub300->datasize >> 0) & 0xFF;
1129 if (vub300->datasize < vub300->fbs[fn]) {
1130 vub300->cmnd.head.block_count[0] = 0;
1131 vub300->cmnd.head.block_count[1] = 0;
1132 }
1133 } else {
1134 vub300->cmnd.head.block_count[0] = (data->blocks >> 8) & 0xFF;
1135 vub300->cmnd.head.block_count[1] = (data->blocks >> 0) & 0xFF;
1136 vub300->cmnd.head.block_size[0] = (data->blksz >> 8) & 0xFF;
1137 vub300->cmnd.head.block_size[1] = (data->blksz >> 0) & 0xFF;
1138 vub300->cmnd.head.command_type =
1139 (MMC_DATA_READ & data->flags) ? 0x00 : 0x80;
1140 vub300->cmnd.head.transfer_size[0] =
1141 (vub300->datasize >> 24) & 0xFF;
1142 vub300->cmnd.head.transfer_size[1] =
1143 (vub300->datasize >> 16) & 0xFF;
1144 vub300->cmnd.head.transfer_size[2] =
1145 (vub300->datasize >> 8) & 0xFF;
1146 vub300->cmnd.head.transfer_size[3] =
1147 (vub300->datasize >> 0) & 0xFF;
1148 if (vub300->datasize < vub300->fbs[0]) {
1149 vub300->cmnd.head.block_count[0] = 0;
1150 vub300->cmnd.head.block_count[1] = 0;
1151 }
1152 }
1153 if (vub300->cmnd.head.block_size[0] || vub300->cmnd.head.block_size[1]) {
1154 u16 block_size = vub300->cmnd.head.block_size[1] |
1155 (vub300->cmnd.head.block_size[0] << 8);
1156 u16 block_boundary = FIRMWARE_BLOCK_BOUNDARY -
1157 (FIRMWARE_BLOCK_BOUNDARY % block_size);
1158 vub300->cmnd.head.block_boundary[0] =
1159 (block_boundary >> 8) & 0xFF;
1160 vub300->cmnd.head.block_boundary[1] =
1161 (block_boundary >> 0) & 0xFF;
1162 } else {
1163 vub300->cmnd.head.block_boundary[0] = 0;
1164 vub300->cmnd.head.block_boundary[1] = 0;
1165 }
1166 usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev,
1167 usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep),
1168 &vub300->cmnd, sizeof(vub300->cmnd),
1169 command_out_completed, vub300);
1170 retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL);
1171 if (retval < 0) {
1172 cmd->error = retval;
1173 complete(&vub300->command_complete);
1174 return;
1175 } else {
1176 return;
1177 }
1178 }
1179
1180 /*
1181 * timer callback runs in atomic mode
1182 * so it cannot call usb_kill_urb()
1183 */
1184 static void vub300_sg_timed_out(struct timer_list *t)
1185 {
1186 struct vub300_mmc_host *vub300 = from_timer(vub300, t,
1187 sg_transfer_timer);
1188 vub300->usb_timed_out = 1;
1189 usb_sg_cancel(&vub300->sg_request);
1190 usb_unlink_urb(vub300->command_out_urb);
1191 usb_unlink_urb(vub300->command_res_urb);
1192 }
1193
1194 static u16 roundup_to_multiple_of_64(u16 number)
1195 {
1196 return 0xFFC0 & (0x3F + number);
1197 }
1198
1199 /*
1200 * this is a separate function to solve the 80 column width restriction
1201 */
1202 static void __download_offload_pseudocode(struct vub300_mmc_host *vub300,
1203 const struct firmware *fw)
1204 {
1205 u8 register_count = 0;
1206 u16 ts = 0;
1207 u16 interrupt_size = 0;
1208 const u8 *data = fw->data;
1209 int size = fw->size;
1210 u8 c;
1211 dev_info(&vub300->udev->dev, "using %s for SDIO offload processing\n",
1212 vub300->vub_name);
1213 do {
1214 c = *data++;
1215 } while (size-- && c); /* skip comment */
1216 dev_info(&vub300->udev->dev, "using offload firmware %s %s\n", fw->data,
1217 vub300->vub_name);
1218 if (size < 4) {
1219 dev_err(&vub300->udev->dev,
1220 "corrupt offload pseudocode in firmware %s\n",
1221 vub300->vub_name);
1222 strncpy(vub300->vub_name, "corrupt offload pseudocode",
1223 sizeof(vub300->vub_name));
1224 return;
1225 }
1226 interrupt_size += *data++;
1227 size -= 1;
1228 interrupt_size <<= 8;
1229 interrupt_size += *data++;
1230 size -= 1;
1231 if (interrupt_size < size) {
1232 u16 xfer_length = roundup_to_multiple_of_64(interrupt_size);
1233 u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL);
1234 if (xfer_buffer) {
1235 int retval;
1236 memcpy(xfer_buffer, data, interrupt_size);
1237 memset(xfer_buffer + interrupt_size, 0,
1238 xfer_length - interrupt_size);
1239 size -= interrupt_size;
1240 data += interrupt_size;
1241 retval =
1242 usb_control_msg(vub300->udev,
1243 usb_sndctrlpipe(vub300->udev, 0),
1244 SET_INTERRUPT_PSEUDOCODE,
1245 USB_DIR_OUT | USB_TYPE_VENDOR |
1246 USB_RECIP_DEVICE, 0x0000, 0x0000,
1247 xfer_buffer, xfer_length, HZ);
1248 kfree(xfer_buffer);
1249 if (retval < 0)
1250 goto copy_error_message;
1251 } else {
1252 dev_err(&vub300->udev->dev,
1253 "not enough memory for xfer buffer to send"
1254 " INTERRUPT_PSEUDOCODE for %s %s\n", fw->data,
1255 vub300->vub_name);
1256 strncpy(vub300->vub_name,
1257 "SDIO interrupt pseudocode download failed",
1258 sizeof(vub300->vub_name));
1259 return;
1260 }
1261 } else {
1262 dev_err(&vub300->udev->dev,
1263 "corrupt interrupt pseudocode in firmware %s %s\n",
1264 fw->data, vub300->vub_name);
1265 strncpy(vub300->vub_name, "corrupt interrupt pseudocode",
1266 sizeof(vub300->vub_name));
1267 return;
1268 }
1269 ts += *data++;
1270 size -= 1;
1271 ts <<= 8;
1272 ts += *data++;
1273 size -= 1;
1274 if (ts < size) {
1275 u16 xfer_length = roundup_to_multiple_of_64(ts);
1276 u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL);
1277 if (xfer_buffer) {
1278 int retval;
1279 memcpy(xfer_buffer, data, ts);
1280 memset(xfer_buffer + ts, 0,
1281 xfer_length - ts);
1282 size -= ts;
1283 data += ts;
1284 retval =
1285 usb_control_msg(vub300->udev,
1286 usb_sndctrlpipe(vub300->udev, 0),
1287 SET_TRANSFER_PSEUDOCODE,
1288 USB_DIR_OUT | USB_TYPE_VENDOR |
1289 USB_RECIP_DEVICE, 0x0000, 0x0000,
1290 xfer_buffer, xfer_length, HZ);
1291 kfree(xfer_buffer);
1292 if (retval < 0)
1293 goto copy_error_message;
1294 } else {
1295 dev_err(&vub300->udev->dev,
1296 "not enough memory for xfer buffer to send"
1297 " TRANSFER_PSEUDOCODE for %s %s\n", fw->data,
1298 vub300->vub_name);
1299 strncpy(vub300->vub_name,
1300 "SDIO transfer pseudocode download failed",
1301 sizeof(vub300->vub_name));
1302 return;
1303 }
1304 } else {
1305 dev_err(&vub300->udev->dev,
1306 "corrupt transfer pseudocode in firmware %s %s\n",
1307 fw->data, vub300->vub_name);
1308 strncpy(vub300->vub_name, "corrupt transfer pseudocode",
1309 sizeof(vub300->vub_name));
1310 return;
1311 }
1312 register_count += *data++;
1313 size -= 1;
1314 if (register_count * 4 == size) {
1315 int I = vub300->dynamic_register_count = register_count;
1316 int i = 0;
1317 while (I--) {
1318 unsigned int func_num = 0;
1319 vub300->sdio_register[i].func_num = *data++;
1320 size -= 1;
1321 func_num += *data++;
1322 size -= 1;
1323 func_num <<= 8;
1324 func_num += *data++;
1325 size -= 1;
1326 func_num <<= 8;
1327 func_num += *data++;
1328 size -= 1;
1329 vub300->sdio_register[i].sdio_reg = func_num;
1330 vub300->sdio_register[i].activate = 1;
1331 vub300->sdio_register[i].prepared = 0;
1332 i += 1;
1333 }
1334 dev_info(&vub300->udev->dev,
1335 "initialized %d dynamic pseudocode registers\n",
1336 vub300->dynamic_register_count);
1337 return;
1338 } else {
1339 dev_err(&vub300->udev->dev,
1340 "corrupt dynamic registers in firmware %s\n",
1341 vub300->vub_name);
1342 strncpy(vub300->vub_name, "corrupt dynamic registers",
1343 sizeof(vub300->vub_name));
1344 return;
1345 }
1346
1347 return;
1348
1349 copy_error_message:
1350 strncpy(vub300->vub_name, "SDIO pseudocode download failed",
1351 sizeof(vub300->vub_name));
1352 }
1353
1354 /*
1355 * if the binary containing the EMPTY PseudoCode can not be found
1356 * vub300->vub_name is set anyway in order to prevent an automatic retry
1357 */
1358 static void download_offload_pseudocode(struct vub300_mmc_host *vub300)
1359 {
1360 struct mmc_card *card = vub300->mmc->card;
1361 int sdio_funcs = card->sdio_funcs;
1362 const struct firmware *fw = NULL;
1363 int l = snprintf(vub300->vub_name, sizeof(vub300->vub_name),
1364 "vub_%04X%04X", card->cis.vendor, card->cis.device);
1365 int n = 0;
1366 int retval;
1367 for (n = 0; n < sdio_funcs; n++) {
1368 struct sdio_func *sf = card->sdio_func[n];
1369 l += snprintf(vub300->vub_name + l,
1370 sizeof(vub300->vub_name) - l, "_%04X%04X",
1371 sf->vendor, sf->device);
1372 }
1373 snprintf(vub300->vub_name + l, sizeof(vub300->vub_name) - l, ".bin");
1374 dev_info(&vub300->udev->dev, "requesting offload firmware %s\n",
1375 vub300->vub_name);
1376 retval = request_firmware(&fw, vub300->vub_name, &card->dev);
1377 if (retval < 0) {
1378 strncpy(vub300->vub_name, "vub_default.bin",
1379 sizeof(vub300->vub_name));
1380 retval = request_firmware(&fw, vub300->vub_name, &card->dev);
1381 if (retval < 0) {
1382 strncpy(vub300->vub_name,
1383 "no SDIO offload firmware found",
1384 sizeof(vub300->vub_name));
1385 } else {
1386 __download_offload_pseudocode(vub300, fw);
1387 release_firmware(fw);
1388 }
1389 } else {
1390 __download_offload_pseudocode(vub300, fw);
1391 release_firmware(fw);
1392 }
1393 }
1394
1395 static void vub300_usb_bulk_msg_completion(struct urb *urb)
1396 { /* urb completion handler - hardirq */
1397 complete((struct completion *)urb->context);
1398 }
1399
1400 static int vub300_usb_bulk_msg(struct vub300_mmc_host *vub300,
1401 unsigned int pipe, void *data, int len,
1402 int *actual_length, int timeout_msecs)
1403 {
1404 /* cmd_mutex is held by vub300_cmndwork_thread */
1405 struct usb_device *usb_dev = vub300->udev;
1406 struct completion done;
1407 int retval;
1408 vub300->urb = usb_alloc_urb(0, GFP_KERNEL);
1409 if (!vub300->urb)
1410 return -ENOMEM;
1411 usb_fill_bulk_urb(vub300->urb, usb_dev, pipe, data, len,
1412 vub300_usb_bulk_msg_completion, NULL);
1413 init_completion(&done);
1414 vub300->urb->context = &done;
1415 vub300->urb->actual_length = 0;
1416 retval = usb_submit_urb(vub300->urb, GFP_KERNEL);
1417 if (unlikely(retval))
1418 goto out;
1419 if (!wait_for_completion_timeout
1420 (&done, msecs_to_jiffies(timeout_msecs))) {
1421 retval = -ETIMEDOUT;
1422 usb_kill_urb(vub300->urb);
1423 } else {
1424 retval = vub300->urb->status;
1425 }
1426 out:
1427 *actual_length = vub300->urb->actual_length;
1428 usb_free_urb(vub300->urb);
1429 vub300->urb = NULL;
1430 return retval;
1431 }
1432
1433 static int __command_read_data(struct vub300_mmc_host *vub300,
1434 struct mmc_command *cmd, struct mmc_data *data)
1435 {
1436 /* cmd_mutex is held by vub300_cmndwork_thread */
1437 int linear_length = vub300->datasize;
1438 int padded_length = vub300->large_usb_packets ?
1439 ((511 + linear_length) >> 9) << 9 :
1440 ((63 + linear_length) >> 6) << 6;
1441 if ((padded_length == linear_length) || !pad_input_to_usb_pkt) {
1442 int result;
1443 unsigned pipe;
1444 pipe = usb_rcvbulkpipe(vub300->udev, vub300->data_inp_ep);
1445 result = usb_sg_init(&vub300->sg_request, vub300->udev,
1446 pipe, 0, data->sg,
1447 data->sg_len, 0, GFP_KERNEL);
1448 if (result < 0) {
1449 usb_unlink_urb(vub300->command_out_urb);
1450 usb_unlink_urb(vub300->command_res_urb);
1451 cmd->error = result;
1452 data->bytes_xfered = 0;
1453 return 0;
1454 } else {
1455 vub300->sg_transfer_timer.expires =
1456 jiffies + msecs_to_jiffies(2000 +
1457 (linear_length / 16384));
1458 add_timer(&vub300->sg_transfer_timer);
1459 usb_sg_wait(&vub300->sg_request);
1460 del_timer(&vub300->sg_transfer_timer);
1461 if (vub300->sg_request.status < 0) {
1462 cmd->error = vub300->sg_request.status;
1463 data->bytes_xfered = 0;
1464 return 0;
1465 } else {
1466 data->bytes_xfered = vub300->datasize;
1467 return linear_length;
1468 }
1469 }
1470 } else {
1471 u8 *buf = kmalloc(padded_length, GFP_KERNEL);
1472 if (buf) {
1473 int result;
1474 unsigned pipe = usb_rcvbulkpipe(vub300->udev,
1475 vub300->data_inp_ep);
1476 int actual_length = 0;
1477 result = vub300_usb_bulk_msg(vub300, pipe, buf,
1478 padded_length, &actual_length,
1479 2000 + (padded_length / 16384));
1480 if (result < 0) {
1481 cmd->error = result;
1482 data->bytes_xfered = 0;
1483 kfree(buf);
1484 return 0;
1485 } else if (actual_length < linear_length) {
1486 cmd->error = -EREMOTEIO;
1487 data->bytes_xfered = 0;
1488 kfree(buf);
1489 return 0;
1490 } else {
1491 sg_copy_from_buffer(data->sg, data->sg_len, buf,
1492 linear_length);
1493 kfree(buf);
1494 data->bytes_xfered = vub300->datasize;
1495 return linear_length;
1496 }
1497 } else {
1498 cmd->error = -ENOMEM;
1499 data->bytes_xfered = 0;
1500 return 0;
1501 }
1502 }
1503 }
1504
1505 static int __command_write_data(struct vub300_mmc_host *vub300,
1506 struct mmc_command *cmd, struct mmc_data *data)
1507 {
1508 /* cmd_mutex is held by vub300_cmndwork_thread */
1509 unsigned pipe = usb_sndbulkpipe(vub300->udev, vub300->data_out_ep);
1510 int linear_length = vub300->datasize;
1511 int modulo_64_length = linear_length & 0x003F;
1512 int modulo_512_length = linear_length & 0x01FF;
1513 if (linear_length < 64) {
1514 int result;
1515 int actual_length;
1516 sg_copy_to_buffer(data->sg, data->sg_len,
1517 vub300->padded_buffer,
1518 sizeof(vub300->padded_buffer));
1519 memset(vub300->padded_buffer + linear_length, 0,
1520 sizeof(vub300->padded_buffer) - linear_length);
1521 result = vub300_usb_bulk_msg(vub300, pipe, vub300->padded_buffer,
1522 sizeof(vub300->padded_buffer),
1523 &actual_length, 2000 +
1524 (sizeof(vub300->padded_buffer) /
1525 16384));
1526 if (result < 0) {
1527 cmd->error = result;
1528 data->bytes_xfered = 0;
1529 } else {
1530 data->bytes_xfered = vub300->datasize;
1531 }
1532 } else if ((!vub300->large_usb_packets && (0 < modulo_64_length)) ||
1533 (vub300->large_usb_packets && (64 > modulo_512_length))
1534 ) { /* don't you just love these work-rounds */
1535 int padded_length = ((63 + linear_length) >> 6) << 6;
1536 u8 *buf = kmalloc(padded_length, GFP_KERNEL);
1537 if (buf) {
1538 int result;
1539 int actual_length;
1540 sg_copy_to_buffer(data->sg, data->sg_len, buf,
1541 padded_length);
1542 memset(buf + linear_length, 0,
1543 padded_length - linear_length);
1544 result =
1545 vub300_usb_bulk_msg(vub300, pipe, buf,
1546 padded_length, &actual_length,
1547 2000 + padded_length / 16384);
1548 kfree(buf);
1549 if (result < 0) {
1550 cmd->error = result;
1551 data->bytes_xfered = 0;
1552 } else {
1553 data->bytes_xfered = vub300->datasize;
1554 }
1555 } else {
1556 cmd->error = -ENOMEM;
1557 data->bytes_xfered = 0;
1558 }
1559 } else { /* no data padding required */
1560 int result;
1561 unsigned char buf[64 * 4];
1562 sg_copy_to_buffer(data->sg, data->sg_len, buf, sizeof(buf));
1563 result = usb_sg_init(&vub300->sg_request, vub300->udev,
1564 pipe, 0, data->sg,
1565 data->sg_len, 0, GFP_KERNEL);
1566 if (result < 0) {
1567 usb_unlink_urb(vub300->command_out_urb);
1568 usb_unlink_urb(vub300->command_res_urb);
1569 cmd->error = result;
1570 data->bytes_xfered = 0;
1571 } else {
1572 vub300->sg_transfer_timer.expires =
1573 jiffies + msecs_to_jiffies(2000 +
1574 linear_length / 16384);
1575 add_timer(&vub300->sg_transfer_timer);
1576 usb_sg_wait(&vub300->sg_request);
1577 if (cmd->error) {
1578 data->bytes_xfered = 0;
1579 } else {
1580 del_timer(&vub300->sg_transfer_timer);
1581 if (vub300->sg_request.status < 0) {
1582 cmd->error = vub300->sg_request.status;
1583 data->bytes_xfered = 0;
1584 } else {
1585 data->bytes_xfered = vub300->datasize;
1586 }
1587 }
1588 }
1589 }
1590 return linear_length;
1591 }
1592
1593 static void __vub300_command_response(struct vub300_mmc_host *vub300,
1594 struct mmc_command *cmd,
1595 struct mmc_data *data, int data_length)
1596 {
1597 /* cmd_mutex is held by vub300_cmndwork_thread */
1598 long respretval;
1599 int msec_timeout = 1000 + data_length / 4;
1600 respretval =
1601 wait_for_completion_timeout(&vub300->command_complete,
1602 msecs_to_jiffies(msec_timeout));
1603 if (respretval == 0) { /* TIMED OUT */
1604 /* we don't know which of "out" and "res" if any failed */
1605 int result;
1606 vub300->usb_timed_out = 1;
1607 usb_kill_urb(vub300->command_out_urb);
1608 usb_kill_urb(vub300->command_res_urb);
1609 cmd->error = -ETIMEDOUT;
1610 result = usb_lock_device_for_reset(vub300->udev,
1611 vub300->interface);
1612 if (result == 0) {
1613 result = usb_reset_device(vub300->udev);
1614 usb_unlock_device(vub300->udev);
1615 }
1616 } else if (respretval < 0) {
1617 /* we don't know which of "out" and "res" if any failed */
1618 usb_kill_urb(vub300->command_out_urb);
1619 usb_kill_urb(vub300->command_res_urb);
1620 cmd->error = respretval;
1621 } else if (cmd->error) {
1622 /*
1623 * the error occurred sending the command
1624 * or receiving the response
1625 */
1626 } else if (vub300->command_out_urb->status) {
1627 vub300->usb_transport_fail = vub300->command_out_urb->status;
1628 cmd->error = -EPROTO == vub300->command_out_urb->status ?
1629 -ESHUTDOWN : vub300->command_out_urb->status;
1630 } else if (vub300->command_res_urb->status) {
1631 vub300->usb_transport_fail = vub300->command_res_urb->status;
1632 cmd->error = -EPROTO == vub300->command_res_urb->status ?
1633 -ESHUTDOWN : vub300->command_res_urb->status;
1634 } else if (vub300->resp.common.header_type == 0x00) {
1635 /*
1636 * the command completed successfully
1637 * and there was no piggybacked data
1638 */
1639 } else if (vub300->resp.common.header_type == RESPONSE_ERROR) {
1640 cmd->error =
1641 vub300_response_error(vub300->resp.error.error_code);
1642 if (vub300->data)
1643 usb_sg_cancel(&vub300->sg_request);
1644 } else if (vub300->resp.common.header_type == RESPONSE_PIGGYBACKED) {
1645 int offloaded_data_length =
1646 vub300->resp.common.header_size -
1647 sizeof(struct sd_register_header);
1648 int register_count = offloaded_data_length >> 3;
1649 int ri = 0;
1650 while (register_count--) {
1651 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
1652 ri += 1;
1653 }
1654 vub300->resp.common.header_size =
1655 sizeof(struct sd_register_header);
1656 vub300->resp.common.header_type = 0x00;
1657 cmd->error = 0;
1658 } else if (vub300->resp.common.header_type == RESPONSE_PIG_DISABLED) {
1659 int offloaded_data_length =
1660 vub300->resp.common.header_size -
1661 sizeof(struct sd_register_header);
1662 int register_count = offloaded_data_length >> 3;
1663 int ri = 0;
1664 while (register_count--) {
1665 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
1666 ri += 1;
1667 }
1668 mutex_lock(&vub300->irq_mutex);
1669 if (vub300->irqs_queued) {
1670 vub300->irqs_queued += 1;
1671 } else if (vub300->irq_enabled) {
1672 vub300->irqs_queued += 1;
1673 vub300_queue_poll_work(vub300, 0);
1674 } else {
1675 vub300->irqs_queued += 1;
1676 }
1677 vub300->irq_disabled = 1;
1678 mutex_unlock(&vub300->irq_mutex);
1679 vub300->resp.common.header_size =
1680 sizeof(struct sd_register_header);
1681 vub300->resp.common.header_type = 0x00;
1682 cmd->error = 0;
1683 } else if (vub300->resp.common.header_type == RESPONSE_PIG_ENABLED) {
1684 int offloaded_data_length =
1685 vub300->resp.common.header_size -
1686 sizeof(struct sd_register_header);
1687 int register_count = offloaded_data_length >> 3;
1688 int ri = 0;
1689 while (register_count--) {
1690 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
1691 ri += 1;
1692 }
1693 mutex_lock(&vub300->irq_mutex);
1694 if (vub300->irqs_queued) {
1695 vub300->irqs_queued += 1;
1696 } else if (vub300->irq_enabled) {
1697 vub300->irqs_queued += 1;
1698 vub300_queue_poll_work(vub300, 0);
1699 } else {
1700 vub300->irqs_queued += 1;
1701 }
1702 vub300->irq_disabled = 0;
1703 mutex_unlock(&vub300->irq_mutex);
1704 vub300->resp.common.header_size =
1705 sizeof(struct sd_register_header);
1706 vub300->resp.common.header_type = 0x00;
1707 cmd->error = 0;
1708 } else {
1709 cmd->error = -EINVAL;
1710 }
1711 }
1712
1713 static void construct_request_response(struct vub300_mmc_host *vub300,
1714 struct mmc_command *cmd)
1715 {
1716 int resp_len = vub300->resp_len;
1717 int less_cmd = (17 == resp_len) ? resp_len : resp_len - 1;
1718 int bytes = 3 & less_cmd;
1719 int words = less_cmd >> 2;
1720 u8 *r = vub300->resp.response.command_response;
1721 if (bytes == 3) {
1722 cmd->resp[words] = (r[1 + (words << 2)] << 24)
1723 | (r[2 + (words << 2)] << 16)
1724 | (r[3 + (words << 2)] << 8);
1725 } else if (bytes == 2) {
1726 cmd->resp[words] = (r[1 + (words << 2)] << 24)
1727 | (r[2 + (words << 2)] << 16);
1728 } else if (bytes == 1) {
1729 cmd->resp[words] = (r[1 + (words << 2)] << 24);
1730 }
1731 while (words-- > 0) {
1732 cmd->resp[words] = (r[1 + (words << 2)] << 24)
1733 | (r[2 + (words << 2)] << 16)
1734 | (r[3 + (words << 2)] << 8)
1735 | (r[4 + (words << 2)] << 0);
1736 }
1737 if ((cmd->opcode == 53) && (0x000000FF & cmd->resp[0]))
1738 cmd->resp[0] &= 0xFFFFFF00;
1739 }
1740
1741 /* this thread runs only when there is an upper level command req outstanding */
1742 static void vub300_cmndwork_thread(struct work_struct *work)
1743 {
1744 struct vub300_mmc_host *vub300 =
1745 container_of(work, struct vub300_mmc_host, cmndwork);
1746 if (!vub300->interface) {
1747 kref_put(&vub300->kref, vub300_delete);
1748 return;
1749 } else {
1750 struct mmc_request *req = vub300->req;
1751 struct mmc_command *cmd = vub300->cmd;
1752 struct mmc_data *data = vub300->data;
1753 int data_length;
1754 mutex_lock(&vub300->cmd_mutex);
1755 init_completion(&vub300->command_complete);
1756 if (likely(vub300->vub_name[0]) || !vub300->mmc->card) {
1757 /*
1758 * the name of the EMPTY Pseudo firmware file
1759 * is used as a flag to indicate that the file
1760 * has been already downloaded to the VUB300 chip
1761 */
1762 } else if (0 == vub300->mmc->card->sdio_funcs) {
1763 strncpy(vub300->vub_name, "SD memory device",
1764 sizeof(vub300->vub_name));
1765 } else {
1766 download_offload_pseudocode(vub300);
1767 }
1768 send_command(vub300);
1769 if (!data)
1770 data_length = 0;
1771 else if (MMC_DATA_READ & data->flags)
1772 data_length = __command_read_data(vub300, cmd, data);
1773 else
1774 data_length = __command_write_data(vub300, cmd, data);
1775 __vub300_command_response(vub300, cmd, data, data_length);
1776 vub300->req = NULL;
1777 vub300->cmd = NULL;
1778 vub300->data = NULL;
1779 if (cmd->error) {
1780 if (cmd->error == -ENOMEDIUM)
1781 check_vub300_port_status(vub300);
1782 mutex_unlock(&vub300->cmd_mutex);
1783 mmc_request_done(vub300->mmc, req);
1784 kref_put(&vub300->kref, vub300_delete);
1785 return;
1786 } else {
1787 construct_request_response(vub300, cmd);
1788 vub300->resp_len = 0;
1789 mutex_unlock(&vub300->cmd_mutex);
1790 kref_put(&vub300->kref, vub300_delete);
1791 mmc_request_done(vub300->mmc, req);
1792 return;
1793 }
1794 }
1795 }
1796
1797 static int examine_cyclic_buffer(struct vub300_mmc_host *vub300,
1798 struct mmc_command *cmd, u8 Function)
1799 {
1800 /* cmd_mutex is held by vub300_mmc_request */
1801 u8 cmd0 = 0xFF & (cmd->arg >> 24);
1802 u8 cmd1 = 0xFF & (cmd->arg >> 16);
1803 u8 cmd2 = 0xFF & (cmd->arg >> 8);
1804 u8 cmd3 = 0xFF & (cmd->arg >> 0);
1805 int first = MAXREGMASK & vub300->fn[Function].offload_point;
1806 struct offload_registers_access *rf = &vub300->fn[Function].reg[first];
1807 if (cmd0 == rf->command_byte[0] &&
1808 cmd1 == rf->command_byte[1] &&
1809 cmd2 == rf->command_byte[2] &&
1810 cmd3 == rf->command_byte[3]) {
1811 u8 checksum = 0x00;
1812 cmd->resp[1] = checksum << 24;
1813 cmd->resp[0] = (rf->Respond_Byte[0] << 24)
1814 | (rf->Respond_Byte[1] << 16)
1815 | (rf->Respond_Byte[2] << 8)
1816 | (rf->Respond_Byte[3] << 0);
1817 vub300->fn[Function].offload_point += 1;
1818 vub300->fn[Function].offload_count -= 1;
1819 vub300->total_offload_count -= 1;
1820 return 1;
1821 } else {
1822 int delta = 1; /* because it does not match the first one */
1823 u8 register_count = vub300->fn[Function].offload_count - 1;
1824 u32 register_point = vub300->fn[Function].offload_point + 1;
1825 while (0 < register_count) {
1826 int point = MAXREGMASK & register_point;
1827 struct offload_registers_access *r =
1828 &vub300->fn[Function].reg[point];
1829 if (cmd0 == r->command_byte[0] &&
1830 cmd1 == r->command_byte[1] &&
1831 cmd2 == r->command_byte[2] &&
1832 cmd3 == r->command_byte[3]) {
1833 u8 checksum = 0x00;
1834 cmd->resp[1] = checksum << 24;
1835 cmd->resp[0] = (r->Respond_Byte[0] << 24)
1836 | (r->Respond_Byte[1] << 16)
1837 | (r->Respond_Byte[2] << 8)
1838 | (r->Respond_Byte[3] << 0);
1839 vub300->fn[Function].offload_point += delta;
1840 vub300->fn[Function].offload_count -= delta;
1841 vub300->total_offload_count -= delta;
1842 return 1;
1843 } else {
1844 register_point += 1;
1845 register_count -= 1;
1846 delta += 1;
1847 continue;
1848 }
1849 }
1850 return 0;
1851 }
1852 }
1853
1854 static int satisfy_request_from_offloaded_data(struct vub300_mmc_host *vub300,
1855 struct mmc_command *cmd)
1856 {
1857 /* cmd_mutex is held by vub300_mmc_request */
1858 u8 regs = vub300->dynamic_register_count;
1859 u8 i = 0;
1860 u8 func = FUN(cmd);
1861 u32 reg = REG(cmd);
1862 while (0 < regs--) {
1863 if ((vub300->sdio_register[i].func_num == func) &&
1864 (vub300->sdio_register[i].sdio_reg == reg)) {
1865 if (!vub300->sdio_register[i].prepared) {
1866 return 0;
1867 } else if ((0x80000000 & cmd->arg) == 0x80000000) {
1868 /*
1869 * a write to a dynamic register
1870 * nullifies our offloaded value
1871 */
1872 vub300->sdio_register[i].prepared = 0;
1873 return 0;
1874 } else {
1875 u8 checksum = 0x00;
1876 u8 rsp0 = 0x00;
1877 u8 rsp1 = 0x00;
1878 u8 rsp2 = vub300->sdio_register[i].response;
1879 u8 rsp3 = vub300->sdio_register[i].regvalue;
1880 vub300->sdio_register[i].prepared = 0;
1881 cmd->resp[1] = checksum << 24;
1882 cmd->resp[0] = (rsp0 << 24)
1883 | (rsp1 << 16)
1884 | (rsp2 << 8)
1885 | (rsp3 << 0);
1886 return 1;
1887 }
1888 } else {
1889 i += 1;
1890 continue;
1891 }
1892 }
1893 if (vub300->total_offload_count == 0)
1894 return 0;
1895 else if (vub300->fn[func].offload_count == 0)
1896 return 0;
1897 else
1898 return examine_cyclic_buffer(vub300, cmd, func);
1899 }
1900
1901 static void vub300_mmc_request(struct mmc_host *mmc, struct mmc_request *req)
1902 { /* NOT irq */
1903 struct mmc_command *cmd = req->cmd;
1904 struct vub300_mmc_host *vub300 = mmc_priv(mmc);
1905 if (!vub300->interface) {
1906 cmd->error = -ESHUTDOWN;
1907 mmc_request_done(mmc, req);
1908 return;
1909 } else {
1910 struct mmc_data *data = req->data;
1911 if (!vub300->card_powered) {
1912 cmd->error = -ENOMEDIUM;
1913 mmc_request_done(mmc, req);
1914 return;
1915 }
1916 if (!vub300->card_present) {
1917 cmd->error = -ENOMEDIUM;
1918 mmc_request_done(mmc, req);
1919 return;
1920 }
1921 if (vub300->usb_transport_fail) {
1922 cmd->error = vub300->usb_transport_fail;
1923 mmc_request_done(mmc, req);
1924 return;
1925 }
1926 if (!vub300->interface) {
1927 cmd->error = -ENODEV;
1928 mmc_request_done(mmc, req);
1929 return;
1930 }
1931 kref_get(&vub300->kref);
1932 mutex_lock(&vub300->cmd_mutex);
1933 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
1934 /*
1935 * for performance we have to return immediately
1936 * if the requested data has been offloaded
1937 */
1938 if (cmd->opcode == 52 &&
1939 satisfy_request_from_offloaded_data(vub300, cmd)) {
1940 cmd->error = 0;
1941 mutex_unlock(&vub300->cmd_mutex);
1942 kref_put(&vub300->kref, vub300_delete);
1943 mmc_request_done(mmc, req);
1944 return;
1945 } else {
1946 vub300->cmd = cmd;
1947 vub300->req = req;
1948 vub300->data = data;
1949 if (data)
1950 vub300->datasize = data->blksz * data->blocks;
1951 else
1952 vub300->datasize = 0;
1953 vub300_queue_cmnd_work(vub300);
1954 mutex_unlock(&vub300->cmd_mutex);
1955 kref_put(&vub300->kref, vub300_delete);
1956 /*
1957 * the kernel lock diagnostics complain
1958 * if the cmd_mutex * is "passed on"
1959 * to the cmndwork thread,
1960 * so we must release it now
1961 * and re-acquire it in the cmndwork thread
1962 */
1963 }
1964 }
1965 }
1966
1967 static void __set_clock_speed(struct vub300_mmc_host *vub300, u8 buf[8],
1968 struct mmc_ios *ios)
1969 {
1970 int buf_array_size = 8; /* ARRAY_SIZE(buf) does not work !!! */
1971 int retval;
1972 u32 kHzClock;
1973 if (ios->clock >= 48000000)
1974 kHzClock = 48000;
1975 else if (ios->clock >= 24000000)
1976 kHzClock = 24000;
1977 else if (ios->clock >= 20000000)
1978 kHzClock = 20000;
1979 else if (ios->clock >= 15000000)
1980 kHzClock = 15000;
1981 else if (ios->clock >= 200000)
1982 kHzClock = 200;
1983 else
1984 kHzClock = 0;
1985 {
1986 int i;
1987 u64 c = kHzClock;
1988 for (i = 0; i < buf_array_size; i++) {
1989 buf[i] = c;
1990 c >>= 8;
1991 }
1992 }
1993 retval =
1994 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
1995 SET_CLOCK_SPEED,
1996 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1997 0x00, 0x00, buf, buf_array_size, HZ);
1998 if (retval != 8) {
1999 dev_err(&vub300->udev->dev, "SET_CLOCK_SPEED"
2000 " %dkHz failed with retval=%d\n", kHzClock, retval);
2001 } else {
2002 dev_dbg(&vub300->udev->dev, "SET_CLOCK_SPEED"
2003 " %dkHz\n", kHzClock);
2004 }
2005 }
2006
2007 static void vub300_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
2008 { /* NOT irq */
2009 struct vub300_mmc_host *vub300 = mmc_priv(mmc);
2010 if (!vub300->interface)
2011 return;
2012 kref_get(&vub300->kref);
2013 mutex_lock(&vub300->cmd_mutex);
2014 if ((ios->power_mode == MMC_POWER_OFF) && vub300->card_powered) {
2015 vub300->card_powered = 0;
2016 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
2017 SET_SD_POWER,
2018 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2019 0x0000, 0x0000, NULL, 0, HZ);
2020 /* must wait for the VUB300 u-proc to boot up */
2021 msleep(600);
2022 } else if ((ios->power_mode == MMC_POWER_UP) && !vub300->card_powered) {
2023 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
2024 SET_SD_POWER,
2025 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2026 0x0001, 0x0000, NULL, 0, HZ);
2027 msleep(600);
2028 vub300->card_powered = 1;
2029 } else if (ios->power_mode == MMC_POWER_ON) {
2030 u8 *buf = kmalloc(8, GFP_KERNEL);
2031 if (buf) {
2032 __set_clock_speed(vub300, buf, ios);
2033 kfree(buf);
2034 }
2035 } else {
2036 /* this should mean no change of state */
2037 }
2038 mutex_unlock(&vub300->cmd_mutex);
2039 kref_put(&vub300->kref, vub300_delete);
2040 }
2041
2042 static int vub300_mmc_get_ro(struct mmc_host *mmc)
2043 {
2044 struct vub300_mmc_host *vub300 = mmc_priv(mmc);
2045 return vub300->read_only;
2046 }
2047
2048 static void vub300_enable_sdio_irq(struct mmc_host *mmc, int enable)
2049 { /* NOT irq */
2050 struct vub300_mmc_host *vub300 = mmc_priv(mmc);
2051 if (!vub300->interface)
2052 return;
2053 kref_get(&vub300->kref);
2054 if (enable) {
2055 mutex_lock(&vub300->irq_mutex);
2056 if (vub300->irqs_queued) {
2057 vub300->irqs_queued -= 1;
2058 mmc_signal_sdio_irq(vub300->mmc);
2059 } else if (vub300->irq_disabled) {
2060 vub300->irq_disabled = 0;
2061 vub300->irq_enabled = 1;
2062 vub300_queue_poll_work(vub300, 0);
2063 } else if (vub300->irq_enabled) {
2064 /* this should not happen, so we will just ignore it */
2065 } else {
2066 vub300->irq_enabled = 1;
2067 vub300_queue_poll_work(vub300, 0);
2068 }
2069 mutex_unlock(&vub300->irq_mutex);
2070 } else {
2071 vub300->irq_enabled = 0;
2072 }
2073 kref_put(&vub300->kref, vub300_delete);
2074 }
2075
2076 static void vub300_init_card(struct mmc_host *mmc, struct mmc_card *card)
2077 { /* NOT irq */
2078 struct vub300_mmc_host *vub300 = mmc_priv(mmc);
2079 dev_info(&vub300->udev->dev, "NO host QUIRKS for this card\n");
2080 }
2081
2082 static const struct mmc_host_ops vub300_mmc_ops = {
2083 .request = vub300_mmc_request,
2084 .set_ios = vub300_mmc_set_ios,
2085 .get_ro = vub300_mmc_get_ro,
2086 .enable_sdio_irq = vub300_enable_sdio_irq,
2087 .init_card = vub300_init_card,
2088 };
2089
2090 static int vub300_probe(struct usb_interface *interface,
2091 const struct usb_device_id *id)
2092 { /* NOT irq */
2093 struct vub300_mmc_host *vub300;
2094 struct usb_host_interface *iface_desc;
2095 struct usb_device *udev = usb_get_dev(interface_to_usbdev(interface));
2096 int i;
2097 int retval = -ENOMEM;
2098 struct urb *command_out_urb;
2099 struct urb *command_res_urb;
2100 struct mmc_host *mmc;
2101 char manufacturer[48];
2102 char product[32];
2103 char serial_number[32];
2104 usb_string(udev, udev->descriptor.iManufacturer, manufacturer,
2105 sizeof(manufacturer));
2106 usb_string(udev, udev->descriptor.iProduct, product, sizeof(product));
2107 usb_string(udev, udev->descriptor.iSerialNumber, serial_number,
2108 sizeof(serial_number));
2109 dev_info(&udev->dev, "probing VID:PID(%04X:%04X) %s %s %s\n",
2110 le16_to_cpu(udev->descriptor.idVendor),
2111 le16_to_cpu(udev->descriptor.idProduct),
2112 manufacturer, product, serial_number);
2113 command_out_urb = usb_alloc_urb(0, GFP_KERNEL);
2114 if (!command_out_urb) {
2115 retval = -ENOMEM;
2116 goto error0;
2117 }
2118 command_res_urb = usb_alloc_urb(0, GFP_KERNEL);
2119 if (!command_res_urb) {
2120 retval = -ENOMEM;
2121 goto error1;
2122 }
2123 /* this also allocates memory for our VUB300 mmc host device */
2124 mmc = mmc_alloc_host(sizeof(struct vub300_mmc_host), &udev->dev);
2125 if (!mmc) {
2126 retval = -ENOMEM;
2127 dev_err(&udev->dev, "not enough memory for the mmc_host\n");
2128 goto error4;
2129 }
2130 /* MMC core transfer sizes tunable parameters */
2131 mmc->caps = 0;
2132 if (!force_1_bit_data_xfers)
2133 mmc->caps |= MMC_CAP_4_BIT_DATA;
2134 if (!force_polling_for_irqs)
2135 mmc->caps |= MMC_CAP_SDIO_IRQ;
2136 mmc->caps &= ~MMC_CAP_NEEDS_POLL;
2137 /*
2138 * MMC_CAP_NEEDS_POLL causes core.c:mmc_rescan() to poll
2139 * for devices which results in spurious CMD7's being
2140 * issued which stops some SDIO cards from working
2141 */
2142 if (limit_speed_to_24_MHz) {
2143 mmc->caps |= MMC_CAP_MMC_HIGHSPEED;
2144 mmc->caps |= MMC_CAP_SD_HIGHSPEED;
2145 mmc->f_max = 24000000;
2146 dev_info(&udev->dev, "limiting SDIO speed to 24_MHz\n");
2147 } else {
2148 mmc->caps |= MMC_CAP_MMC_HIGHSPEED;
2149 mmc->caps |= MMC_CAP_SD_HIGHSPEED;
2150 mmc->f_max = 48000000;
2151 }
2152 mmc->f_min = 200000;
2153 mmc->max_blk_count = 511;
2154 mmc->max_blk_size = 512;
2155 mmc->max_segs = 128;
2156 if (force_max_req_size)
2157 mmc->max_req_size = force_max_req_size * 1024;
2158 else
2159 mmc->max_req_size = 64 * 1024;
2160 mmc->max_seg_size = mmc->max_req_size;
2161 mmc->ocr_avail = 0;
2162 mmc->ocr_avail |= MMC_VDD_165_195;
2163 mmc->ocr_avail |= MMC_VDD_20_21;
2164 mmc->ocr_avail |= MMC_VDD_21_22;
2165 mmc->ocr_avail |= MMC_VDD_22_23;
2166 mmc->ocr_avail |= MMC_VDD_23_24;
2167 mmc->ocr_avail |= MMC_VDD_24_25;
2168 mmc->ocr_avail |= MMC_VDD_25_26;
2169 mmc->ocr_avail |= MMC_VDD_26_27;
2170 mmc->ocr_avail |= MMC_VDD_27_28;
2171 mmc->ocr_avail |= MMC_VDD_28_29;
2172 mmc->ocr_avail |= MMC_VDD_29_30;
2173 mmc->ocr_avail |= MMC_VDD_30_31;
2174 mmc->ocr_avail |= MMC_VDD_31_32;
2175 mmc->ocr_avail |= MMC_VDD_32_33;
2176 mmc->ocr_avail |= MMC_VDD_33_34;
2177 mmc->ocr_avail |= MMC_VDD_34_35;
2178 mmc->ocr_avail |= MMC_VDD_35_36;
2179 mmc->ops = &vub300_mmc_ops;
2180 vub300 = mmc_priv(mmc);
2181 vub300->mmc = mmc;
2182 vub300->card_powered = 0;
2183 vub300->bus_width = 0;
2184 vub300->cmnd.head.block_size[0] = 0x00;
2185 vub300->cmnd.head.block_size[1] = 0x00;
2186 vub300->app_spec = 0;
2187 mutex_init(&vub300->cmd_mutex);
2188 mutex_init(&vub300->irq_mutex);
2189 vub300->command_out_urb = command_out_urb;
2190 vub300->command_res_urb = command_res_urb;
2191 vub300->usb_timed_out = 0;
2192 vub300->dynamic_register_count = 0;
2193
2194 for (i = 0; i < ARRAY_SIZE(vub300->fn); i++) {
2195 vub300->fn[i].offload_point = 0;
2196 vub300->fn[i].offload_count = 0;
2197 }
2198
2199 vub300->total_offload_count = 0;
2200 vub300->irq_enabled = 0;
2201 vub300->irq_disabled = 0;
2202 vub300->irqs_queued = 0;
2203
2204 for (i = 0; i < ARRAY_SIZE(vub300->sdio_register); i++)
2205 vub300->sdio_register[i++].activate = 0;
2206
2207 vub300->udev = udev;
2208 vub300->interface = interface;
2209 vub300->cmnd_res_ep = 0;
2210 vub300->cmnd_out_ep = 0;
2211 vub300->data_inp_ep = 0;
2212 vub300->data_out_ep = 0;
2213
2214 for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++)
2215 vub300->fbs[i] = 512;
2216
2217 /*
2218 * set up the endpoint information
2219 *
2220 * use the first pair of bulk-in and bulk-out
2221 * endpoints for Command/Response+Interrupt
2222 *
2223 * use the second pair of bulk-in and bulk-out
2224 * endpoints for Data In/Out
2225 */
2226 vub300->large_usb_packets = 0;
2227 iface_desc = interface->cur_altsetting;
2228 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2229 struct usb_endpoint_descriptor *endpoint =
2230 &iface_desc->endpoint[i].desc;
2231 dev_info(&vub300->udev->dev,
2232 "vub300 testing %s EndPoint(%d) %02X\n",
2233 usb_endpoint_is_bulk_in(endpoint) ? "BULK IN" :
2234 usb_endpoint_is_bulk_out(endpoint) ? "BULK OUT" :
2235 "UNKNOWN", i, endpoint->bEndpointAddress);
2236 if (endpoint->wMaxPacketSize > 64)
2237 vub300->large_usb_packets = 1;
2238 if (usb_endpoint_is_bulk_in(endpoint)) {
2239 if (!vub300->cmnd_res_ep) {
2240 vub300->cmnd_res_ep =
2241 endpoint->bEndpointAddress;
2242 } else if (!vub300->data_inp_ep) {
2243 vub300->data_inp_ep =
2244 endpoint->bEndpointAddress;
2245 } else {
2246 dev_warn(&vub300->udev->dev,
2247 "ignoring"
2248 " unexpected bulk_in endpoint");
2249 }
2250 } else if (usb_endpoint_is_bulk_out(endpoint)) {
2251 if (!vub300->cmnd_out_ep) {
2252 vub300->cmnd_out_ep =
2253 endpoint->bEndpointAddress;
2254 } else if (!vub300->data_out_ep) {
2255 vub300->data_out_ep =
2256 endpoint->bEndpointAddress;
2257 } else {
2258 dev_warn(&vub300->udev->dev,
2259 "ignoring"
2260 " unexpected bulk_out endpoint");
2261 }
2262 } else {
2263 dev_warn(&vub300->udev->dev,
2264 "vub300 ignoring EndPoint(%d) %02X", i,
2265 endpoint->bEndpointAddress);
2266 }
2267 }
2268 if (vub300->cmnd_res_ep && vub300->cmnd_out_ep &&
2269 vub300->data_inp_ep && vub300->data_out_ep) {
2270 dev_info(&vub300->udev->dev,
2271 "vub300 %s packets"
2272 " using EndPoints %02X %02X %02X %02X\n",
2273 vub300->large_usb_packets ? "LARGE" : "SMALL",
2274 vub300->cmnd_out_ep, vub300->cmnd_res_ep,
2275 vub300->data_out_ep, vub300->data_inp_ep);
2276 /* we have the expected EndPoints */
2277 } else {
2278 dev_err(&vub300->udev->dev,
2279 "Could not find two sets of bulk-in/out endpoint pairs\n");
2280 retval = -EINVAL;
2281 goto error5;
2282 }
2283 retval =
2284 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
2285 GET_HC_INF0,
2286 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2287 0x0000, 0x0000, &vub300->hc_info,
2288 sizeof(vub300->hc_info), HZ);
2289 if (retval < 0)
2290 goto error5;
2291 retval =
2292 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
2293 SET_ROM_WAIT_STATES,
2294 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2295 firmware_rom_wait_states, 0x0000, NULL, 0, HZ);
2296 if (retval < 0)
2297 goto error5;
2298 dev_info(&vub300->udev->dev,
2299 "operating_mode = %s %s %d MHz %s %d byte USB packets\n",
2300 (mmc->caps & MMC_CAP_SDIO_IRQ) ? "IRQs" : "POLL",
2301 (mmc->caps & MMC_CAP_4_BIT_DATA) ? "4-bit" : "1-bit",
2302 mmc->f_max / 1000000,
2303 pad_input_to_usb_pkt ? "padding input data to" : "with",
2304 vub300->large_usb_packets ? 512 : 64);
2305 retval =
2306 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
2307 GET_SYSTEM_PORT_STATUS,
2308 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2309 0x0000, 0x0000, &vub300->system_port_status,
2310 sizeof(vub300->system_port_status), HZ);
2311 if (retval < 0) {
2312 goto error4;
2313 } else if (sizeof(vub300->system_port_status) == retval) {
2314 vub300->card_present =
2315 (0x0001 & vub300->system_port_status.port_flags) ? 1 : 0;
2316 vub300->read_only =
2317 (0x0010 & vub300->system_port_status.port_flags) ? 1 : 0;
2318 } else {
2319 goto error4;
2320 }
2321 usb_set_intfdata(interface, vub300);
2322 INIT_DELAYED_WORK(&vub300->pollwork, vub300_pollwork_thread);
2323 INIT_WORK(&vub300->cmndwork, vub300_cmndwork_thread);
2324 INIT_WORK(&vub300->deadwork, vub300_deadwork_thread);
2325 kref_init(&vub300->kref);
2326 timer_setup(&vub300->sg_transfer_timer, vub300_sg_timed_out, 0);
2327 kref_get(&vub300->kref);
2328 timer_setup(&vub300->inactivity_timer,
2329 vub300_inactivity_timer_expired, 0);
2330 vub300->inactivity_timer.expires = jiffies + HZ;
2331 add_timer(&vub300->inactivity_timer);
2332 if (vub300->card_present)
2333 dev_info(&vub300->udev->dev,
2334 "USB vub300 remote SDIO host controller[%d]"
2335 "connected with SD/SDIO card inserted\n",
2336 interface_to_InterfaceNumber(interface));
2337 else
2338 dev_info(&vub300->udev->dev,
2339 "USB vub300 remote SDIO host controller[%d]"
2340 "connected with no SD/SDIO card inserted\n",
2341 interface_to_InterfaceNumber(interface));
2342 mmc_add_host(mmc);
2343 return 0;
2344 error5:
2345 mmc_free_host(mmc);
2346 /*
2347 * and hence also frees vub300
2348 * which is contained at the end of struct mmc
2349 */
2350 error4:
2351 usb_free_urb(command_res_urb);
2352 error1:
2353 usb_free_urb(command_out_urb);
2354 error0:
2355 usb_put_dev(udev);
2356 return retval;
2357 }
2358
2359 static void vub300_disconnect(struct usb_interface *interface)
2360 { /* NOT irq */
2361 struct vub300_mmc_host *vub300 = usb_get_intfdata(interface);
2362 if (!vub300 || !vub300->mmc) {
2363 return;
2364 } else {
2365 struct mmc_host *mmc = vub300->mmc;
2366 if (!vub300->mmc) {
2367 return;
2368 } else {
2369 int ifnum = interface_to_InterfaceNumber(interface);
2370 usb_set_intfdata(interface, NULL);
2371 /* prevent more I/O from starting */
2372 vub300->interface = NULL;
2373 kref_put(&vub300->kref, vub300_delete);
2374 mmc_remove_host(mmc);
2375 pr_info("USB vub300 remote SDIO host controller[%d]"
2376 " now disconnected", ifnum);
2377 return;
2378 }
2379 }
2380 }
2381
2382 #ifdef CONFIG_PM
2383 static int vub300_suspend(struct usb_interface *intf, pm_message_t message)
2384 {
2385 return 0;
2386 }
2387
2388 static int vub300_resume(struct usb_interface *intf)
2389 {
2390 return 0;
2391 }
2392 #else
2393 #define vub300_suspend NULL
2394 #define vub300_resume NULL
2395 #endif
2396 static int vub300_pre_reset(struct usb_interface *intf)
2397 { /* NOT irq */
2398 struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
2399 mutex_lock(&vub300->cmd_mutex);
2400 return 0;
2401 }
2402
2403 static int vub300_post_reset(struct usb_interface *intf)
2404 { /* NOT irq */
2405 struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
2406 /* we are sure no URBs are active - no locking needed */
2407 vub300->errors = -EPIPE;
2408 mutex_unlock(&vub300->cmd_mutex);
2409 return 0;
2410 }
2411
2412 static struct usb_driver vub300_driver = {
2413 .name = "vub300",
2414 .probe = vub300_probe,
2415 .disconnect = vub300_disconnect,
2416 .suspend = vub300_suspend,
2417 .resume = vub300_resume,
2418 .pre_reset = vub300_pre_reset,
2419 .post_reset = vub300_post_reset,
2420 .id_table = vub300_table,
2421 .supports_autosuspend = 1,
2422 };
2423
2424 static int __init vub300_init(void)
2425 { /* NOT irq */
2426 int result;
2427
2428 pr_info("VUB300 Driver rom wait states = %02X irqpoll timeout = %04X",
2429 firmware_rom_wait_states, 0x0FFFF & firmware_irqpoll_timeout);
2430 cmndworkqueue = create_singlethread_workqueue("kvub300c");
2431 if (!cmndworkqueue) {
2432 pr_err("not enough memory for the REQUEST workqueue");
2433 result = -ENOMEM;
2434 goto out1;
2435 }
2436 pollworkqueue = create_singlethread_workqueue("kvub300p");
2437 if (!pollworkqueue) {
2438 pr_err("not enough memory for the IRQPOLL workqueue");
2439 result = -ENOMEM;
2440 goto out2;
2441 }
2442 deadworkqueue = create_singlethread_workqueue("kvub300d");
2443 if (!deadworkqueue) {
2444 pr_err("not enough memory for the EXPIRED workqueue");
2445 result = -ENOMEM;
2446 goto out3;
2447 }
2448 result = usb_register(&vub300_driver);
2449 if (result) {
2450 pr_err("usb_register failed. Error number %d", result);
2451 goto out4;
2452 }
2453 return 0;
2454 out4:
2455 destroy_workqueue(deadworkqueue);
2456 out3:
2457 destroy_workqueue(pollworkqueue);
2458 out2:
2459 destroy_workqueue(cmndworkqueue);
2460 out1:
2461 return result;
2462 }
2463
2464 static void __exit vub300_exit(void)
2465 {
2466 usb_deregister(&vub300_driver);
2467 flush_workqueue(cmndworkqueue);
2468 flush_workqueue(pollworkqueue);
2469 flush_workqueue(deadworkqueue);
2470 destroy_workqueue(cmndworkqueue);
2471 destroy_workqueue(pollworkqueue);
2472 destroy_workqueue(deadworkqueue);
2473 }
2474
2475 module_init(vub300_init);
2476 module_exit(vub300_exit);
2477
2478 MODULE_AUTHOR("Tony Olech <tony.olech@elandigitalsystems.com>");
2479 MODULE_DESCRIPTION("VUB300 USB to SD/MMC/SDIO adapter driver");
2480 MODULE_LICENSE("GPL");
Linux with added FPC-III support