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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / mmc / host / vub300.c
blob3135a1a5d75d004fda64cf0160f14481bc6af333
1 /*
2 * Remote VUB300 SDIO/SDmem Host Controller Driver
3 *
4 * Copyright (C) 2010 Elan Digital Systems Limited
5 *
6 * based on USB Skeleton driver - 2.2
7 *
8 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation, version 2
13 *
14 * VUB300: is a USB 2.0 client device with a single SDIO/SDmem/MMC slot
15 * Any SDIO/SDmem/MMC device plugged into the VUB300 will appear,
16 * by virtue of this driver, to have been plugged into a local
17 * SDIO host controller, similar to, say, a PCI Ricoh controller
18 * This is because this kernel device driver is both a USB 2.0
19 * client device driver AND an MMC host controller driver. Thus
20 * if there is an existing driver for the inserted SDIO/SDmem/MMC
21 * device then that driver will be used by the kernel to manage
22 * the device in exactly the same fashion as if it had been
23 * directly plugged into, say, a local pci bus Ricoh controller
24 *
25 * RANT: this driver was written using a display 128x48 - converting it
26 * to a line width of 80 makes it very difficult to support. In
27 * particular functions have been broken down into sub functions
28 * and the original meaningful names have been shortened into
29 * cryptic ones.
30 * The problem is that executing a fragment of code subject to
31 * two conditions means an indentation of 24, thus leaving only
32 * 56 characters for a C statement. And that is quite ridiculous!
33 *
34 * Data types: data passed to/from the VUB300 is fixed to a number of
35 * bits and driver data fields reflect that limit by using
36 * u8, u16, u32
37 */
38 #include <linux/kernel.h>
39 #include <linux/errno.h>
40 #include <linux/init.h>
41 #include <linux/slab.h>
42 #include <linux/module.h>
43 #include <linux/kref.h>
44 #include <linux/uaccess.h>
45 #include <linux/usb.h>
46 #include <linux/mutex.h>
47 #include <linux/mmc/host.h>
48 #include <linux/mmc/card.h>
49 #include <linux/mmc/sdio_func.h>
50 #include <linux/mmc/sdio_ids.h>
51 #include <linux/workqueue.h>
52 #include <linux/ctype.h>
53 #include <linux/firmware.h>
54 #include <linux/scatterlist.h>
55
56 struct host_controller_info {
57 u8 info_size;
58 u16 firmware_version;
59 u8 number_of_ports;
60 } __packed;
61
62 #define FIRMWARE_BLOCK_BOUNDARY 1024
63 struct sd_command_header {
64 u8 header_size;
65 u8 header_type;
66 u8 port_number;
67 u8 command_type; /* Bit7 - Rd/Wr */
68 u8 command_index;
69 u8 transfer_size[4]; /* ReadSize + ReadSize */
70 u8 response_type;
71 u8 arguments[4];
72 u8 block_count[2];
73 u8 block_size[2];
74 u8 block_boundary[2];
75 u8 reserved[44]; /* to pad out to 64 bytes */
76 } __packed;
77
78 struct sd_irqpoll_header {
79 u8 header_size;
80 u8 header_type;
81 u8 port_number;
82 u8 command_type; /* Bit7 - Rd/Wr */
83 u8 padding[16]; /* don't ask why !! */
84 u8 poll_timeout_msb;
85 u8 poll_timeout_lsb;
86 u8 reserved[42]; /* to pad out to 64 bytes */
87 } __packed;
88
89 struct sd_common_header {
90 u8 header_size;
91 u8 header_type;
92 u8 port_number;
93 } __packed;
94
95 struct sd_response_header {
96 u8 header_size;
97 u8 header_type;
98 u8 port_number;
99 u8 command_type;
100 u8 command_index;
101 u8 command_response[0];
102 } __packed;
103
104 struct sd_status_header {
105 u8 header_size;
106 u8 header_type;
107 u8 port_number;
108 u16 port_flags;
109 u32 sdio_clock;
110 u16 host_header_size;
111 u16 func_header_size;
112 u16 ctrl_header_size;
113 } __packed;
114
115 struct sd_error_header {
116 u8 header_size;
117 u8 header_type;
118 u8 port_number;
119 u8 error_code;
120 } __packed;
121
122 struct sd_interrupt_header {
123 u8 header_size;
124 u8 header_type;
125 u8 port_number;
126 } __packed;
127
128 struct offload_registers_access {
129 u8 command_byte[4];
130 u8 Respond_Byte[4];
131 } __packed;
132
133 #define INTERRUPT_REGISTER_ACCESSES 15
134 struct sd_offloaded_interrupt {
135 u8 header_size;
136 u8 header_type;
137 u8 port_number;
138 struct offload_registers_access reg[INTERRUPT_REGISTER_ACCESSES];
139 } __packed;
140
141 struct sd_register_header {
142 u8 header_size;
143 u8 header_type;
144 u8 port_number;
145 u8 command_type;
146 u8 command_index;
147 u8 command_response[6];
148 } __packed;
149
150 #define PIGGYBACK_REGISTER_ACCESSES 14
151 struct sd_offloaded_piggyback {
152 struct sd_register_header sdio;
153 struct offload_registers_access reg[PIGGYBACK_REGISTER_ACCESSES];
154 } __packed;
155
156 union sd_response {
157 struct sd_common_header common;
158 struct sd_status_header status;
159 struct sd_error_header error;
160 struct sd_interrupt_header interrupt;
161 struct sd_response_header response;
162 struct sd_offloaded_interrupt irq;
163 struct sd_offloaded_piggyback pig;
164 } __packed;
165
166 union sd_command {
167 struct sd_command_header head;
168 struct sd_irqpoll_header poll;
169 } __packed;
170
171 enum SD_RESPONSE_TYPE {
172 SDRT_UNSPECIFIED = 0,
173 SDRT_NONE,
174 SDRT_1,
175 SDRT_1B,
176 SDRT_2,
177 SDRT_3,
178 SDRT_4,
179 SDRT_5,
180 SDRT_5B,
181 SDRT_6,
182 SDRT_7,
183 };
184
185 #define RESPONSE_INTERRUPT 0x01
186 #define RESPONSE_ERROR 0x02
187 #define RESPONSE_STATUS 0x03
188 #define RESPONSE_IRQ_DISABLED 0x05
189 #define RESPONSE_IRQ_ENABLED 0x06
190 #define RESPONSE_PIGGYBACKED 0x07
191 #define RESPONSE_NO_INTERRUPT 0x08
192 #define RESPONSE_PIG_DISABLED 0x09
193 #define RESPONSE_PIG_ENABLED 0x0A
194 #define SD_ERROR_1BIT_TIMEOUT 0x01
195 #define SD_ERROR_4BIT_TIMEOUT 0x02
196 #define SD_ERROR_1BIT_CRC_WRONG 0x03
197 #define SD_ERROR_4BIT_CRC_WRONG 0x04
198 #define SD_ERROR_1BIT_CRC_ERROR 0x05
199 #define SD_ERROR_4BIT_CRC_ERROR 0x06
200 #define SD_ERROR_NO_CMD_ENDBIT 0x07
201 #define SD_ERROR_NO_1BIT_DATEND 0x08
202 #define SD_ERROR_NO_4BIT_DATEND 0x09
203 #define SD_ERROR_1BIT_UNEXPECTED_TIMEOUT 0x0A
204 #define SD_ERROR_4BIT_UNEXPECTED_TIMEOUT 0x0B
205 #define SD_ERROR_ILLEGAL_COMMAND 0x0C
206 #define SD_ERROR_NO_DEVICE 0x0D
207 #define SD_ERROR_TRANSFER_LENGTH 0x0E
208 #define SD_ERROR_1BIT_DATA_TIMEOUT 0x0F
209 #define SD_ERROR_4BIT_DATA_TIMEOUT 0x10
210 #define SD_ERROR_ILLEGAL_STATE 0x11
211 #define SD_ERROR_UNKNOWN_ERROR 0x12
212 #define SD_ERROR_RESERVED_ERROR 0x13
213 #define SD_ERROR_INVALID_FUNCTION 0x14
214 #define SD_ERROR_OUT_OF_RANGE 0x15
215 #define SD_ERROR_STAT_CMD 0x16
216 #define SD_ERROR_STAT_DATA 0x17
217 #define SD_ERROR_STAT_CMD_TIMEOUT 0x18
218 #define SD_ERROR_SDCRDY_STUCK 0x19
219 #define SD_ERROR_UNHANDLED 0x1A
220 #define SD_ERROR_OVERRUN 0x1B
221 #define SD_ERROR_PIO_TIMEOUT 0x1C
222
223 #define FUN(c) (0x000007 & (c->arg>>28))
224 #define REG(c) (0x01FFFF & (c->arg>>9))
225
226 static bool limit_speed_to_24_MHz;
227 module_param(limit_speed_to_24_MHz, bool, 0644);
228 MODULE_PARM_DESC(limit_speed_to_24_MHz, "Limit Max SDIO Clock Speed to 24 MHz");
229
230 static bool pad_input_to_usb_pkt;
231 module_param(pad_input_to_usb_pkt, bool, 0644);
232 MODULE_PARM_DESC(pad_input_to_usb_pkt,
233 "Pad USB data input transfers to whole USB Packet");
234
235 static bool disable_offload_processing;
236 module_param(disable_offload_processing, bool, 0644);
237 MODULE_PARM_DESC(disable_offload_processing, "Disable Offload Processing");
238
239 static bool force_1_bit_data_xfers;
240 module_param(force_1_bit_data_xfers, bool, 0644);
241 MODULE_PARM_DESC(force_1_bit_data_xfers,
242 "Force SDIO Data Transfers to 1-bit Mode");
243
244 static bool force_polling_for_irqs;
245 module_param(force_polling_for_irqs, bool, 0644);
246 MODULE_PARM_DESC(force_polling_for_irqs, "Force Polling for SDIO interrupts");
247
248 static int firmware_irqpoll_timeout = 1024;
249 module_param(firmware_irqpoll_timeout, int, 0644);
250 MODULE_PARM_DESC(firmware_irqpoll_timeout, "VUB300 firmware irqpoll timeout");
251
252 static int force_max_req_size = 128;
253 module_param(force_max_req_size, int, 0644);
254 MODULE_PARM_DESC(force_max_req_size, "set max request size in kBytes");
255
256 #ifdef SMSC_DEVELOPMENT_BOARD
257 static int firmware_rom_wait_states = 0x04;
258 #else
259 static int firmware_rom_wait_states = 0x1C;
260 #endif
261
262 module_param(firmware_rom_wait_states, int, 0644);
263 MODULE_PARM_DESC(firmware_rom_wait_states,
264 "ROM wait states byte=RRRIIEEE (Reserved Internal External)");
265
266 #define ELAN_VENDOR_ID 0x2201
267 #define VUB300_VENDOR_ID 0x0424
268 #define VUB300_PRODUCT_ID 0x012C
269 static struct usb_device_id vub300_table[] = {
270 {USB_DEVICE(ELAN_VENDOR_ID, VUB300_PRODUCT_ID)},
271 {USB_DEVICE(VUB300_VENDOR_ID, VUB300_PRODUCT_ID)},
272 {} /* Terminating entry */
273 };
274 MODULE_DEVICE_TABLE(usb, vub300_table);
275
276 static struct workqueue_struct *cmndworkqueue;
277 static struct workqueue_struct *pollworkqueue;
278 static struct workqueue_struct *deadworkqueue;
279
280 static inline int interface_to_InterfaceNumber(struct usb_interface *interface)
281 {
282 if (!interface)
283 return -1;
284 if (!interface->cur_altsetting)
285 return -1;
286 return interface->cur_altsetting->desc.bInterfaceNumber;
287 }
288
289 struct sdio_register {
290 unsigned func_num:3;
291 unsigned sdio_reg:17;
292 unsigned activate:1;
293 unsigned prepared:1;
294 unsigned regvalue:8;
295 unsigned response:8;
296 unsigned sparebit:26;
297 };
298
299 struct vub300_mmc_host {
300 struct usb_device *udev;
301 struct usb_interface *interface;
302 struct kref kref;
303 struct mutex cmd_mutex;
304 struct mutex irq_mutex;
305 char vub_name[3 + (9 * 8) + 4 + 1]; /* max of 7 sdio fn's */
306 u8 cmnd_out_ep; /* EndPoint for commands */
307 u8 cmnd_res_ep; /* EndPoint for responses */
308 u8 data_out_ep; /* EndPoint for out data */
309 u8 data_inp_ep; /* EndPoint for inp data */
310 bool card_powered;
311 bool card_present;
312 bool read_only;
313 bool large_usb_packets;
314 bool app_spec; /* ApplicationSpecific */
315 bool irq_enabled; /* by the MMC CORE */
316 bool irq_disabled; /* in the firmware */
317 unsigned bus_width:4;
318 u8 total_offload_count;
319 u8 dynamic_register_count;
320 u8 resp_len;
321 u32 datasize;
322 int errors;
323 int usb_transport_fail;
324 int usb_timed_out;
325 int irqs_queued;
326 struct sdio_register sdio_register[16];
327 struct offload_interrupt_function_register {
328 #define MAXREGBITS 4
329 #define MAXREGS (1<<MAXREGBITS)
330 #define MAXREGMASK (MAXREGS-1)
331 u8 offload_count;
332 u32 offload_point;
333 struct offload_registers_access reg[MAXREGS];
334 } fn[8];
335 u16 fbs[8]; /* Function Block Size */
336 struct mmc_command *cmd;
337 struct mmc_request *req;
338 struct mmc_data *data;
339 struct mmc_host *mmc;
340 struct urb *urb;
341 struct urb *command_out_urb;
342 struct urb *command_res_urb;
343 struct completion command_complete;
344 struct completion irqpoll_complete;
345 union sd_command cmnd;
346 union sd_response resp;
347 struct timer_list sg_transfer_timer;
348 struct usb_sg_request sg_request;
349 struct timer_list inactivity_timer;
350 struct work_struct deadwork;
351 struct work_struct cmndwork;
352 struct delayed_work pollwork;
353 struct host_controller_info hc_info;
354 struct sd_status_header system_port_status;
355 u8 padded_buffer[64];
356 };
357
358 #define kref_to_vub300_mmc_host(d) container_of(d, struct vub300_mmc_host, kref)
359 #define SET_TRANSFER_PSEUDOCODE 21
360 #define SET_INTERRUPT_PSEUDOCODE 20
361 #define SET_FAILURE_MODE 18
362 #define SET_ROM_WAIT_STATES 16
363 #define SET_IRQ_ENABLE 13
364 #define SET_CLOCK_SPEED 11
365 #define SET_FUNCTION_BLOCK_SIZE 9
366 #define SET_SD_DATA_MODE 6
367 #define SET_SD_POWER 4
368 #define ENTER_DFU_MODE 3
369 #define GET_HC_INF0 1
370 #define GET_SYSTEM_PORT_STATUS 0
371
372 static void vub300_delete(struct kref *kref)
373 { /* kref callback - softirq */
374 struct vub300_mmc_host *vub300 = kref_to_vub300_mmc_host(kref);
375 struct mmc_host *mmc = vub300->mmc;
376 usb_free_urb(vub300->command_out_urb);
377 vub300->command_out_urb = NULL;
378 usb_free_urb(vub300->command_res_urb);
379 vub300->command_res_urb = NULL;
380 usb_put_dev(vub300->udev);
381 mmc_free_host(mmc);
382 /*
383 * and hence also frees vub300
384 * which is contained at the end of struct mmc
385 */
386 }
387
388 static void vub300_queue_cmnd_work(struct vub300_mmc_host *vub300)
389 {
390 kref_get(&vub300->kref);
391 if (queue_work(cmndworkqueue, &vub300->cmndwork)) {
392 /*
393 * then the cmndworkqueue was not previously
394 * running and the above get ref is obvious
395 * required and will be put when the thread
396 * terminates by a specific call
397 */
398 } else {
399 /*
400 * the cmndworkqueue was already running from
401 * a previous invocation and thus to keep the
402 * kref counts correct we must undo the get
403 */
404 kref_put(&vub300->kref, vub300_delete);
405 }
406 }
407
408 static void vub300_queue_poll_work(struct vub300_mmc_host *vub300, int delay)
409 {
410 kref_get(&vub300->kref);
411 if (queue_delayed_work(pollworkqueue, &vub300->pollwork, delay)) {
412 /*
413 * then the pollworkqueue was not previously
414 * running and the above get ref is obvious
415 * required and will be put when the thread
416 * terminates by a specific call
417 */
418 } else {
419 /*
420 * the pollworkqueue was already running from
421 * a previous invocation and thus to keep the
422 * kref counts correct we must undo the get
423 */
424 kref_put(&vub300->kref, vub300_delete);
425 }
426 }
427
428 static void vub300_queue_dead_work(struct vub300_mmc_host *vub300)
429 {
430 kref_get(&vub300->kref);
431 if (queue_work(deadworkqueue, &vub300->deadwork)) {
432 /*
433 * then the deadworkqueue was not previously
434 * running and the above get ref is obvious
435 * required and will be put when the thread
436 * terminates by a specific call
437 */
438 } else {
439 /*
440 * the deadworkqueue was already running from
441 * a previous invocation and thus to keep the
442 * kref counts correct we must undo the get
443 */
444 kref_put(&vub300->kref, vub300_delete);
445 }
446 }
447
448 static void irqpoll_res_completed(struct urb *urb)
449 { /* urb completion handler - hardirq */
450 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
451 if (urb->status)
452 vub300->usb_transport_fail = urb->status;
453 complete(&vub300->irqpoll_complete);
454 }
455
456 static void irqpoll_out_completed(struct urb *urb)
457 { /* urb completion handler - hardirq */
458 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
459 if (urb->status) {
460 vub300->usb_transport_fail = urb->status;
461 complete(&vub300->irqpoll_complete);
462 return;
463 } else {
464 int ret;
465 unsigned int pipe =
466 usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep);
467 usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe,
468 &vub300->resp, sizeof(vub300->resp),
469 irqpoll_res_completed, vub300);
470 vub300->command_res_urb->actual_length = 0;
471 ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC);
472 if (ret) {
473 vub300->usb_transport_fail = ret;
474 complete(&vub300->irqpoll_complete);
475 }
476 return;
477 }
478 }
479
480 static void send_irqpoll(struct vub300_mmc_host *vub300)
481 {
482 /* cmd_mutex is held by vub300_pollwork_thread */
483 int retval;
484 int timeout = 0xFFFF & (0x0001FFFF - firmware_irqpoll_timeout);
485 vub300->cmnd.poll.header_size = 22;
486 vub300->cmnd.poll.header_type = 1;
487 vub300->cmnd.poll.port_number = 0;
488 vub300->cmnd.poll.command_type = 2;
489 vub300->cmnd.poll.poll_timeout_lsb = 0xFF & (unsigned)timeout;
490 vub300->cmnd.poll.poll_timeout_msb = 0xFF & (unsigned)(timeout >> 8);
491 usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev,
492 usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep)
493 , &vub300->cmnd, sizeof(vub300->cmnd)
494 , irqpoll_out_completed, vub300);
495 retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL);
496 if (0 > retval) {
497 vub300->usb_transport_fail = retval;
498 vub300_queue_poll_work(vub300, 1);
499 complete(&vub300->irqpoll_complete);
500 return;
501 } else {
502 return;
503 }
504 }
505
506 static void new_system_port_status(struct vub300_mmc_host *vub300)
507 {
508 int old_card_present = vub300->card_present;
509 int new_card_present =
510 (0x0001 & vub300->system_port_status.port_flags) ? 1 : 0;
511 vub300->read_only =
512 (0x0010 & vub300->system_port_status.port_flags) ? 1 : 0;
513 if (new_card_present && !old_card_present) {
514 dev_info(&vub300->udev->dev, "card just inserted\n");
515 vub300->card_present = 1;
516 vub300->bus_width = 0;
517 if (disable_offload_processing)
518 strncpy(vub300->vub_name, "EMPTY Processing Disabled",
519 sizeof(vub300->vub_name));
520 else
521 vub300->vub_name[0] = 0;
522 mmc_detect_change(vub300->mmc, 1);
523 } else if (!new_card_present && old_card_present) {
524 dev_info(&vub300->udev->dev, "card just ejected\n");
525 vub300->card_present = 0;
526 mmc_detect_change(vub300->mmc, 0);
527 } else {
528 /* no change */
529 }
530 }
531
532 static void __add_offloaded_reg_to_fifo(struct vub300_mmc_host *vub300,
533 struct offload_registers_access
534 *register_access, u8 func)
535 {
536 u8 r = vub300->fn[func].offload_point + vub300->fn[func].offload_count;
537 memcpy(&vub300->fn[func].reg[MAXREGMASK & r], register_access,
538 sizeof(struct offload_registers_access));
539 vub300->fn[func].offload_count += 1;
540 vub300->total_offload_count += 1;
541 }
542
543 static void add_offloaded_reg(struct vub300_mmc_host *vub300,
544 struct offload_registers_access *register_access)
545 {
546 u32 Register = ((0x03 & register_access->command_byte[0]) << 15)
547 | ((0xFF & register_access->command_byte[1]) << 7)
548 | ((0xFE & register_access->command_byte[2]) >> 1);
549 u8 func = ((0x70 & register_access->command_byte[0]) >> 4);
550 u8 regs = vub300->dynamic_register_count;
551 u8 i = 0;
552 while (0 < regs-- && 1 == vub300->sdio_register[i].activate) {
553 if (vub300->sdio_register[i].func_num == func &&
554 vub300->sdio_register[i].sdio_reg == Register) {
555 if (vub300->sdio_register[i].prepared == 0)
556 vub300->sdio_register[i].prepared = 1;
557 vub300->sdio_register[i].response =
558 register_access->Respond_Byte[2];
559 vub300->sdio_register[i].regvalue =
560 register_access->Respond_Byte[3];
561 return;
562 } else {
563 i += 1;
564 continue;
565 }
566 };
567 __add_offloaded_reg_to_fifo(vub300, register_access, func);
568 }
569
570 static void check_vub300_port_status(struct vub300_mmc_host *vub300)
571 {
572 /*
573 * cmd_mutex is held by vub300_pollwork_thread,
574 * vub300_deadwork_thread or vub300_cmndwork_thread
575 */
576 int retval;
577 retval =
578 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
579 GET_SYSTEM_PORT_STATUS,
580 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
581 0x0000, 0x0000, &vub300->system_port_status,
582 sizeof(vub300->system_port_status), HZ);
583 if (sizeof(vub300->system_port_status) == retval)
584 new_system_port_status(vub300);
585 }
586
587 static void __vub300_irqpoll_response(struct vub300_mmc_host *vub300)
588 {
589 /* cmd_mutex is held by vub300_pollwork_thread */
590 if (vub300->command_res_urb->actual_length == 0)
591 return;
592
593 switch (vub300->resp.common.header_type) {
594 case RESPONSE_INTERRUPT:
595 mutex_lock(&vub300->irq_mutex);
596 if (vub300->irq_enabled)
597 mmc_signal_sdio_irq(vub300->mmc);
598 else
599 vub300->irqs_queued += 1;
600 vub300->irq_disabled = 1;
601 mutex_unlock(&vub300->irq_mutex);
602 break;
603 case RESPONSE_ERROR:
604 if (vub300->resp.error.error_code == SD_ERROR_NO_DEVICE)
605 check_vub300_port_status(vub300);
606 break;
607 case RESPONSE_STATUS:
608 vub300->system_port_status = vub300->resp.status;
609 new_system_port_status(vub300);
610 if (!vub300->card_present)
611 vub300_queue_poll_work(vub300, HZ / 5);
612 break;
613 case RESPONSE_IRQ_DISABLED:
614 {
615 int offloaded_data_length = vub300->resp.common.header_size - 3;
616 int register_count = offloaded_data_length >> 3;
617 int ri = 0;
618 while (register_count--) {
619 add_offloaded_reg(vub300, &vub300->resp.irq.reg[ri]);
620 ri += 1;
621 }
622 mutex_lock(&vub300->irq_mutex);
623 if (vub300->irq_enabled)
624 mmc_signal_sdio_irq(vub300->mmc);
625 else
626 vub300->irqs_queued += 1;
627 vub300->irq_disabled = 1;
628 mutex_unlock(&vub300->irq_mutex);
629 break;
630 }
631 case RESPONSE_IRQ_ENABLED:
632 {
633 int offloaded_data_length = vub300->resp.common.header_size - 3;
634 int register_count = offloaded_data_length >> 3;
635 int ri = 0;
636 while (register_count--) {
637 add_offloaded_reg(vub300, &vub300->resp.irq.reg[ri]);
638 ri += 1;
639 }
640 mutex_lock(&vub300->irq_mutex);
641 if (vub300->irq_enabled)
642 mmc_signal_sdio_irq(vub300->mmc);
643 else if (vub300->irqs_queued)
644 vub300->irqs_queued += 1;
645 else
646 vub300->irqs_queued += 1;
647 vub300->irq_disabled = 0;
648 mutex_unlock(&vub300->irq_mutex);
649 break;
650 }
651 case RESPONSE_NO_INTERRUPT:
652 vub300_queue_poll_work(vub300, 1);
653 break;
654 default:
655 break;
656 }
657 }
658
659 static void __do_poll(struct vub300_mmc_host *vub300)
660 {
661 /* cmd_mutex is held by vub300_pollwork_thread */
662 long commretval;
663 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
664 init_completion(&vub300->irqpoll_complete);
665 send_irqpoll(vub300);
666 commretval = wait_for_completion_timeout(&vub300->irqpoll_complete,
667 msecs_to_jiffies(500));
668 if (vub300->usb_transport_fail) {
669 /* no need to do anything */
670 } else if (commretval == 0) {
671 vub300->usb_timed_out = 1;
672 usb_kill_urb(vub300->command_out_urb);
673 usb_kill_urb(vub300->command_res_urb);
674 } else if (commretval < 0) {
675 vub300_queue_poll_work(vub300, 1);
676 } else { /* commretval > 0 */
677 __vub300_irqpoll_response(vub300);
678 }
679 }
680
681 /* this thread runs only when the driver
682 * is trying to poll the device for an IRQ
683 */
684 static void vub300_pollwork_thread(struct work_struct *work)
685 { /* NOT irq */
686 struct vub300_mmc_host *vub300 = container_of(work,
687 struct vub300_mmc_host, pollwork.work);
688 if (!vub300->interface) {
689 kref_put(&vub300->kref, vub300_delete);
690 return;
691 }
692 mutex_lock(&vub300->cmd_mutex);
693 if (vub300->cmd) {
694 vub300_queue_poll_work(vub300, 1);
695 } else if (!vub300->card_present) {
696 /* no need to do anything */
697 } else { /* vub300->card_present */
698 mutex_lock(&vub300->irq_mutex);
699 if (!vub300->irq_enabled) {
700 mutex_unlock(&vub300->irq_mutex);
701 } else if (vub300->irqs_queued) {
702 vub300->irqs_queued -= 1;
703 mmc_signal_sdio_irq(vub300->mmc);
704 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
705 mutex_unlock(&vub300->irq_mutex);
706 } else { /* NOT vub300->irqs_queued */
707 mutex_unlock(&vub300->irq_mutex);
708 __do_poll(vub300);
709 }
710 }
711 mutex_unlock(&vub300->cmd_mutex);
712 kref_put(&vub300->kref, vub300_delete);
713 }
714
715 static void vub300_deadwork_thread(struct work_struct *work)
716 { /* NOT irq */
717 struct vub300_mmc_host *vub300 =
718 container_of(work, struct vub300_mmc_host, deadwork);
719 if (!vub300->interface) {
720 kref_put(&vub300->kref, vub300_delete);
721 return;
722 }
723 mutex_lock(&vub300->cmd_mutex);
724 if (vub300->cmd) {
725 /*
726 * a command got in as the inactivity
727 * timer expired - so we just let the
728 * processing of the command show if
729 * the device is dead
730 */
731 } else if (vub300->card_present) {
732 check_vub300_port_status(vub300);
733 } else if (vub300->mmc && vub300->mmc->card &&
734 mmc_card_present(vub300->mmc->card)) {
735 /*
736 * the MMC core must not have responded
737 * to the previous indication - lets
738 * hope that it eventually does so we
739 * will just ignore this for now
740 */
741 } else {
742 check_vub300_port_status(vub300);
743 }
744 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
745 mutex_unlock(&vub300->cmd_mutex);
746 kref_put(&vub300->kref, vub300_delete);
747 }
748
749 static void vub300_inactivity_timer_expired(unsigned long data)
750 { /* softirq */
751 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)data;
752 if (!vub300->interface) {
753 kref_put(&vub300->kref, vub300_delete);
754 } else if (vub300->cmd) {
755 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
756 } else {
757 vub300_queue_dead_work(vub300);
758 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
759 }
760 }
761
762 static int vub300_response_error(u8 error_code)
763 {
764 switch (error_code) {
765 case SD_ERROR_PIO_TIMEOUT:
766 case SD_ERROR_1BIT_TIMEOUT:
767 case SD_ERROR_4BIT_TIMEOUT:
768 return -ETIMEDOUT;
769 case SD_ERROR_STAT_DATA:
770 case SD_ERROR_OVERRUN:
771 case SD_ERROR_STAT_CMD:
772 case SD_ERROR_STAT_CMD_TIMEOUT:
773 case SD_ERROR_SDCRDY_STUCK:
774 case SD_ERROR_UNHANDLED:
775 case SD_ERROR_1BIT_CRC_WRONG:
776 case SD_ERROR_4BIT_CRC_WRONG:
777 case SD_ERROR_1BIT_CRC_ERROR:
778 case SD_ERROR_4BIT_CRC_ERROR:
779 case SD_ERROR_NO_CMD_ENDBIT:
780 case SD_ERROR_NO_1BIT_DATEND:
781 case SD_ERROR_NO_4BIT_DATEND:
782 case SD_ERROR_1BIT_DATA_TIMEOUT:
783 case SD_ERROR_4BIT_DATA_TIMEOUT:
784 case SD_ERROR_1BIT_UNEXPECTED_TIMEOUT:
785 case SD_ERROR_4BIT_UNEXPECTED_TIMEOUT:
786 return -EILSEQ;
787 case 33:
788 return -EILSEQ;
789 case SD_ERROR_ILLEGAL_COMMAND:
790 return -EINVAL;
791 case SD_ERROR_NO_DEVICE:
792 return -ENOMEDIUM;
793 default:
794 return -ENODEV;
795 }
796 }
797
798 static void command_res_completed(struct urb *urb)
799 { /* urb completion handler - hardirq */
800 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
801 if (urb->status) {
802 /* we have to let the initiator handle the error */
803 } else if (vub300->command_res_urb->actual_length == 0) {
804 /*
805 * we have seen this happen once or twice and
806 * we suspect a buggy USB host controller
807 */
808 } else if (!vub300->data) {
809 /* this means that the command (typically CMD52) suceeded */
810 } else if (vub300->resp.common.header_type != 0x02) {
811 /*
812 * this is an error response from the VUB300 chip
813 * and we let the initiator handle it
814 */
815 } else if (vub300->urb) {
816 vub300->cmd->error =
817 vub300_response_error(vub300->resp.error.error_code);
818 usb_unlink_urb(vub300->urb);
819 } else {
820 vub300->cmd->error =
821 vub300_response_error(vub300->resp.error.error_code);
822 usb_sg_cancel(&vub300->sg_request);
823 }
824 complete(&vub300->command_complete); /* got_response_in */
825 }
826
827 static void command_out_completed(struct urb *urb)
828 { /* urb completion handler - hardirq */
829 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
830 if (urb->status) {
831 complete(&vub300->command_complete);
832 } else {
833 int ret;
834 unsigned int pipe =
835 usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep);
836 usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe,
837 &vub300->resp, sizeof(vub300->resp),
838 command_res_completed, vub300);
839 vub300->command_res_urb->actual_length = 0;
840 ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC);
841 if (ret == 0) {
842 /*
843 * the urb completion handler will call
844 * our completion handler
845 */
846 } else {
847 /*
848 * and thus we only call it directly
849 * when it will not be called
850 */
851 complete(&vub300->command_complete);
852 }
853 }
854 }
855
856 /*
857 * the STUFF bits are masked out for the comparisons
858 */
859 static void snoop_block_size_and_bus_width(struct vub300_mmc_host *vub300,
860 u32 cmd_arg)
861 {
862 if ((0xFBFFFE00 & cmd_arg) == 0x80022200)
863 vub300->fbs[1] = (cmd_arg << 8) | (0x00FF & vub300->fbs[1]);
864 else if ((0xFBFFFE00 & cmd_arg) == 0x80022000)
865 vub300->fbs[1] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[1]);
866 else if ((0xFBFFFE00 & cmd_arg) == 0x80042200)
867 vub300->fbs[2] = (cmd_arg << 8) | (0x00FF & vub300->fbs[2]);
868 else if ((0xFBFFFE00 & cmd_arg) == 0x80042000)
869 vub300->fbs[2] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[2]);
870 else if ((0xFBFFFE00 & cmd_arg) == 0x80062200)
871 vub300->fbs[3] = (cmd_arg << 8) | (0x00FF & vub300->fbs[3]);
872 else if ((0xFBFFFE00 & cmd_arg) == 0x80062000)
873 vub300->fbs[3] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[3]);
874 else if ((0xFBFFFE00 & cmd_arg) == 0x80082200)
875 vub300->fbs[4] = (cmd_arg << 8) | (0x00FF & vub300->fbs[4]);
876 else if ((0xFBFFFE00 & cmd_arg) == 0x80082000)
877 vub300->fbs[4] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[4]);
878 else if ((0xFBFFFE00 & cmd_arg) == 0x800A2200)
879 vub300->fbs[5] = (cmd_arg << 8) | (0x00FF & vub300->fbs[5]);
880 else if ((0xFBFFFE00 & cmd_arg) == 0x800A2000)
881 vub300->fbs[5] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[5]);
882 else if ((0xFBFFFE00 & cmd_arg) == 0x800C2200)
883 vub300->fbs[6] = (cmd_arg << 8) | (0x00FF & vub300->fbs[6]);
884 else if ((0xFBFFFE00 & cmd_arg) == 0x800C2000)
885 vub300->fbs[6] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[6]);
886 else if ((0xFBFFFE00 & cmd_arg) == 0x800E2200)
887 vub300->fbs[7] = (cmd_arg << 8) | (0x00FF & vub300->fbs[7]);
888 else if ((0xFBFFFE00 & cmd_arg) == 0x800E2000)
889 vub300->fbs[7] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[7]);
890 else if ((0xFBFFFE03 & cmd_arg) == 0x80000E00)
891 vub300->bus_width = 1;
892 else if ((0xFBFFFE03 & cmd_arg) == 0x80000E02)
893 vub300->bus_width = 4;
894 }
895
896 static void send_command(struct vub300_mmc_host *vub300)
897 {
898 /* cmd_mutex is held by vub300_cmndwork_thread */
899 struct mmc_command *cmd = vub300->cmd;
900 struct mmc_data *data = vub300->data;
901 int retval;
902 int i;
903 u8 response_type;
904 if (vub300->app_spec) {
905 switch (cmd->opcode) {
906 case 6:
907 response_type = SDRT_1;
908 vub300->resp_len = 6;
909 if (0x00000000 == (0x00000003 & cmd->arg))
910 vub300->bus_width = 1;
911 else if (0x00000002 == (0x00000003 & cmd->arg))
912 vub300->bus_width = 4;
913 else
914 dev_err(&vub300->udev->dev,
915 "unexpected ACMD6 bus_width=%d\n",
916 0x00000003 & cmd->arg);
917 break;
918 case 13:
919 response_type = SDRT_1;
920 vub300->resp_len = 6;
921 break;
922 case 22:
923 response_type = SDRT_1;
924 vub300->resp_len = 6;
925 break;
926 case 23:
927 response_type = SDRT_1;
928 vub300->resp_len = 6;
929 break;
930 case 41:
931 response_type = SDRT_3;
932 vub300->resp_len = 6;
933 break;
934 case 42:
935 response_type = SDRT_1;
936 vub300->resp_len = 6;
937 break;
938 case 51:
939 response_type = SDRT_1;
940 vub300->resp_len = 6;
941 break;
942 case 55:
943 response_type = SDRT_1;
944 vub300->resp_len = 6;
945 break;
946 default:
947 vub300->resp_len = 0;
948 cmd->error = -EINVAL;
949 complete(&vub300->command_complete);
950 return;
951 }
952 vub300->app_spec = 0;
953 } else {
954 switch (cmd->opcode) {
955 case 0:
956 response_type = SDRT_NONE;
957 vub300->resp_len = 0;
958 break;
959 case 1:
960 response_type = SDRT_3;
961 vub300->resp_len = 6;
962 break;
963 case 2:
964 response_type = SDRT_2;
965 vub300->resp_len = 17;
966 break;
967 case 3:
968 response_type = SDRT_6;
969 vub300->resp_len = 6;
970 break;
971 case 4:
972 response_type = SDRT_NONE;
973 vub300->resp_len = 0;
974 break;
975 case 5:
976 response_type = SDRT_4;
977 vub300->resp_len = 6;
978 break;
979 case 6:
980 response_type = SDRT_1;
981 vub300->resp_len = 6;
982 break;
983 case 7:
984 response_type = SDRT_1B;
985 vub300->resp_len = 6;
986 break;
987 case 8:
988 response_type = SDRT_7;
989 vub300->resp_len = 6;
990 break;
991 case 9:
992 response_type = SDRT_2;
993 vub300->resp_len = 17;
994 break;
995 case 10:
996 response_type = SDRT_2;
997 vub300->resp_len = 17;
998 break;
999 case 12:
1000 response_type = SDRT_1B;
1001 vub300->resp_len = 6;
1002 break;
1003 case 13:
1004 response_type = SDRT_1;
1005 vub300->resp_len = 6;
1006 break;
1007 case 15:
1008 response_type = SDRT_NONE;
1009 vub300->resp_len = 0;
1010 break;
1011 case 16:
1012 for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++)
1013 vub300->fbs[i] = 0xFFFF & cmd->arg;
1014 response_type = SDRT_1;
1015 vub300->resp_len = 6;
1016 break;
1017 case 17:
1018 case 18:
1019 case 24:
1020 case 25:
1021 case 27:
1022 response_type = SDRT_1;
1023 vub300->resp_len = 6;
1024 break;
1025 case 28:
1026 case 29:
1027 response_type = SDRT_1B;
1028 vub300->resp_len = 6;
1029 break;
1030 case 30:
1031 case 32:
1032 case 33:
1033 response_type = SDRT_1;
1034 vub300->resp_len = 6;
1035 break;
1036 case 38:
1037 response_type = SDRT_1B;
1038 vub300->resp_len = 6;
1039 break;
1040 case 42:
1041 response_type = SDRT_1;
1042 vub300->resp_len = 6;
1043 break;
1044 case 52:
1045 response_type = SDRT_5;
1046 vub300->resp_len = 6;
1047 snoop_block_size_and_bus_width(vub300, cmd->arg);
1048 break;
1049 case 53:
1050 response_type = SDRT_5;
1051 vub300->resp_len = 6;
1052 break;
1053 case 55:
1054 response_type = SDRT_1;
1055 vub300->resp_len = 6;
1056 vub300->app_spec = 1;
1057 break;
1058 case 56:
1059 response_type = SDRT_1;
1060 vub300->resp_len = 6;
1061 break;
1062 default:
1063 vub300->resp_len = 0;
1064 cmd->error = -EINVAL;
1065 complete(&vub300->command_complete);
1066 return;
1067 }
1068 }
1069 /*
1070 * it is a shame that we can not use "sizeof(struct sd_command_header)"
1071 * this is because the packet _must_ be padded to 64 bytes
1072 */
1073 vub300->cmnd.head.header_size = 20;
1074 vub300->cmnd.head.header_type = 0x00;
1075 vub300->cmnd.head.port_number = 0; /* "0" means port 1 */
1076 vub300->cmnd.head.command_type = 0x00; /* standard read command */
1077 vub300->cmnd.head.response_type = response_type;
1078 vub300->cmnd.head.command_index = cmd->opcode;
1079 vub300->cmnd.head.arguments[0] = cmd->arg >> 24;
1080 vub300->cmnd.head.arguments[1] = cmd->arg >> 16;
1081 vub300->cmnd.head.arguments[2] = cmd->arg >> 8;
1082 vub300->cmnd.head.arguments[3] = cmd->arg >> 0;
1083 if (cmd->opcode == 52) {
1084 int fn = 0x7 & (cmd->arg >> 28);
1085 vub300->cmnd.head.block_count[0] = 0;
1086 vub300->cmnd.head.block_count[1] = 0;
1087 vub300->cmnd.head.block_size[0] = (vub300->fbs[fn] >> 8) & 0xFF;
1088 vub300->cmnd.head.block_size[1] = (vub300->fbs[fn] >> 0) & 0xFF;
1089 vub300->cmnd.head.command_type = 0x00;
1090 vub300->cmnd.head.transfer_size[0] = 0;
1091 vub300->cmnd.head.transfer_size[1] = 0;
1092 vub300->cmnd.head.transfer_size[2] = 0;
1093 vub300->cmnd.head.transfer_size[3] = 0;
1094 } else if (!data) {
1095 vub300->cmnd.head.block_count[0] = 0;
1096 vub300->cmnd.head.block_count[1] = 0;
1097 vub300->cmnd.head.block_size[0] = (vub300->fbs[0] >> 8) & 0xFF;
1098 vub300->cmnd.head.block_size[1] = (vub300->fbs[0] >> 0) & 0xFF;
1099 vub300->cmnd.head.command_type = 0x00;
1100 vub300->cmnd.head.transfer_size[0] = 0;
1101 vub300->cmnd.head.transfer_size[1] = 0;
1102 vub300->cmnd.head.transfer_size[2] = 0;
1103 vub300->cmnd.head.transfer_size[3] = 0;
1104 } else if (cmd->opcode == 53) {
1105 int fn = 0x7 & (cmd->arg >> 28);
1106 if (0x08 & vub300->cmnd.head.arguments[0]) { /* BLOCK MODE */
1107 vub300->cmnd.head.block_count[0] =
1108 (data->blocks >> 8) & 0xFF;
1109 vub300->cmnd.head.block_count[1] =
1110 (data->blocks >> 0) & 0xFF;
1111 vub300->cmnd.head.block_size[0] =
1112 (data->blksz >> 8) & 0xFF;
1113 vub300->cmnd.head.block_size[1] =
1114 (data->blksz >> 0) & 0xFF;
1115 } else { /* BYTE MODE */
1116 vub300->cmnd.head.block_count[0] = 0;
1117 vub300->cmnd.head.block_count[1] = 0;
1118 vub300->cmnd.head.block_size[0] =
1119 (vub300->datasize >> 8) & 0xFF;
1120 vub300->cmnd.head.block_size[1] =
1121 (vub300->datasize >> 0) & 0xFF;
1122 }
1123 vub300->cmnd.head.command_type =
1124 (MMC_DATA_READ & data->flags) ? 0x00 : 0x80;
1125 vub300->cmnd.head.transfer_size[0] =
1126 (vub300->datasize >> 24) & 0xFF;
1127 vub300->cmnd.head.transfer_size[1] =
1128 (vub300->datasize >> 16) & 0xFF;
1129 vub300->cmnd.head.transfer_size[2] =
1130 (vub300->datasize >> 8) & 0xFF;
1131 vub300->cmnd.head.transfer_size[3] =
1132 (vub300->datasize >> 0) & 0xFF;
1133 if (vub300->datasize < vub300->fbs[fn]) {
1134 vub300->cmnd.head.block_count[0] = 0;
1135 vub300->cmnd.head.block_count[1] = 0;
1136 }
1137 } else {
1138 vub300->cmnd.head.block_count[0] = (data->blocks >> 8) & 0xFF;
1139 vub300->cmnd.head.block_count[1] = (data->blocks >> 0) & 0xFF;
1140 vub300->cmnd.head.block_size[0] = (data->blksz >> 8) & 0xFF;
1141 vub300->cmnd.head.block_size[1] = (data->blksz >> 0) & 0xFF;
1142 vub300->cmnd.head.command_type =
1143 (MMC_DATA_READ & data->flags) ? 0x00 : 0x80;
1144 vub300->cmnd.head.transfer_size[0] =
1145 (vub300->datasize >> 24) & 0xFF;
1146 vub300->cmnd.head.transfer_size[1] =
1147 (vub300->datasize >> 16) & 0xFF;
1148 vub300->cmnd.head.transfer_size[2] =
1149 (vub300->datasize >> 8) & 0xFF;
1150 vub300->cmnd.head.transfer_size[3] =
1151 (vub300->datasize >> 0) & 0xFF;
1152 if (vub300->datasize < vub300->fbs[0]) {
1153 vub300->cmnd.head.block_count[0] = 0;
1154 vub300->cmnd.head.block_count[1] = 0;
1155 }
1156 }
1157 if (vub300->cmnd.head.block_size[0] || vub300->cmnd.head.block_size[1]) {
1158 u16 block_size = vub300->cmnd.head.block_size[1] |
1159 (vub300->cmnd.head.block_size[0] << 8);
1160 u16 block_boundary = FIRMWARE_BLOCK_BOUNDARY -
1161 (FIRMWARE_BLOCK_BOUNDARY % block_size);
1162 vub300->cmnd.head.block_boundary[0] =
1163 (block_boundary >> 8) & 0xFF;
1164 vub300->cmnd.head.block_boundary[1] =
1165 (block_boundary >> 0) & 0xFF;
1166 } else {
1167 vub300->cmnd.head.block_boundary[0] = 0;
1168 vub300->cmnd.head.block_boundary[1] = 0;
1169 }
1170 usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev,
1171 usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep),
1172 &vub300->cmnd, sizeof(vub300->cmnd),
1173 command_out_completed, vub300);
1174 retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL);
1175 if (retval < 0) {
1176 cmd->error = retval;
1177 complete(&vub300->command_complete);
1178 return;
1179 } else {
1180 return;
1181 }
1182 }
1183
1184 /*
1185 * timer callback runs in atomic mode
1186 * so it cannot call usb_kill_urb()
1187 */
1188 static void vub300_sg_timed_out(unsigned long data)
1189 {
1190 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)data;
1191 vub300->usb_timed_out = 1;
1192 usb_sg_cancel(&vub300->sg_request);
1193 usb_unlink_urb(vub300->command_out_urb);
1194 usb_unlink_urb(vub300->command_res_urb);
1195 }
1196
1197 static u16 roundup_to_multiple_of_64(u16 number)
1198 {
1199 return 0xFFC0 & (0x3F + number);
1200 }
1201
1202 /*
1203 * this is a separate function to solve the 80 column width restriction
1204 */
1205 static void __download_offload_pseudocode(struct vub300_mmc_host *vub300,
1206 const struct firmware *fw)
1207 {
1208 u8 register_count = 0;
1209 u16 ts = 0;
1210 u16 interrupt_size = 0;
1211 const u8 *data = fw->data;
1212 int size = fw->size;
1213 u8 c;
1214 dev_info(&vub300->udev->dev, "using %s for SDIO offload processing\n",
1215 vub300->vub_name);
1216 do {
1217 c = *data++;
1218 } while (size-- && c); /* skip comment */
1219 dev_info(&vub300->udev->dev, "using offload firmware %s %s\n", fw->data,
1220 vub300->vub_name);
1221 if (size < 4) {
1222 dev_err(&vub300->udev->dev,
1223 "corrupt offload pseudocode in firmware %s\n",
1224 vub300->vub_name);
1225 strncpy(vub300->vub_name, "corrupt offload pseudocode",
1226 sizeof(vub300->vub_name));
1227 return;
1228 }
1229 interrupt_size += *data++;
1230 size -= 1;
1231 interrupt_size <<= 8;
1232 interrupt_size += *data++;
1233 size -= 1;
1234 if (interrupt_size < size) {
1235 u16 xfer_length = roundup_to_multiple_of_64(interrupt_size);
1236 u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL);
1237 if (xfer_buffer) {
1238 int retval;
1239 memcpy(xfer_buffer, data, interrupt_size);
1240 memset(xfer_buffer + interrupt_size, 0,
1241 xfer_length - interrupt_size);
1242 size -= interrupt_size;
1243 data += interrupt_size;
1244 retval =
1245 usb_control_msg(vub300->udev,
1246 usb_sndctrlpipe(vub300->udev, 0),
1247 SET_INTERRUPT_PSEUDOCODE,
1248 USB_DIR_OUT | USB_TYPE_VENDOR |
1249 USB_RECIP_DEVICE, 0x0000, 0x0000,
1250 xfer_buffer, xfer_length, HZ);
1251 kfree(xfer_buffer);
1252 if (retval < 0) {
1253 strncpy(vub300->vub_name,
1254 "SDIO pseudocode download failed",
1255 sizeof(vub300->vub_name));
1256 return;
1257 }
1258 } else {
1259 dev_err(&vub300->udev->dev,
1260 "not enough memory for xfer buffer to send"
1261 " INTERRUPT_PSEUDOCODE for %s %s\n", fw->data,
1262 vub300->vub_name);
1263 strncpy(vub300->vub_name,
1264 "SDIO interrupt pseudocode download failed",
1265 sizeof(vub300->vub_name));
1266 return;
1267 }
1268 } else {
1269 dev_err(&vub300->udev->dev,
1270 "corrupt interrupt pseudocode in firmware %s %s\n",
1271 fw->data, vub300->vub_name);
1272 strncpy(vub300->vub_name, "corrupt interrupt pseudocode",
1273 sizeof(vub300->vub_name));
1274 return;
1275 }
1276 ts += *data++;
1277 size -= 1;
1278 ts <<= 8;
1279 ts += *data++;
1280 size -= 1;
1281 if (ts < size) {
1282 u16 xfer_length = roundup_to_multiple_of_64(ts);
1283 u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL);
1284 if (xfer_buffer) {
1285 int retval;
1286 memcpy(xfer_buffer, data, ts);
1287 memset(xfer_buffer + ts, 0,
1288 xfer_length - ts);
1289 size -= ts;
1290 data += ts;
1291 retval =
1292 usb_control_msg(vub300->udev,
1293 usb_sndctrlpipe(vub300->udev, 0),
1294 SET_TRANSFER_PSEUDOCODE,
1295 USB_DIR_OUT | USB_TYPE_VENDOR |
1296 USB_RECIP_DEVICE, 0x0000, 0x0000,
1297 xfer_buffer, xfer_length, HZ);
1298 kfree(xfer_buffer);
1299 if (retval < 0) {
1300 strncpy(vub300->vub_name,
1301 "SDIO pseudocode download failed",
1302 sizeof(vub300->vub_name));
1303 return;
1304 }
1305 } else {
1306 dev_err(&vub300->udev->dev,
1307 "not enough memory for xfer buffer to send"
1308 " TRANSFER_PSEUDOCODE for %s %s\n", fw->data,
1309 vub300->vub_name);
1310 strncpy(vub300->vub_name,
1311 "SDIO transfer pseudocode download failed",
1312 sizeof(vub300->vub_name));
1313 return;
1314 }
1315 } else {
1316 dev_err(&vub300->udev->dev,
1317 "corrupt transfer pseudocode in firmware %s %s\n",
1318 fw->data, vub300->vub_name);
1319 strncpy(vub300->vub_name, "corrupt transfer pseudocode",
1320 sizeof(vub300->vub_name));
1321 return;
1322 }
1323 register_count += *data++;
1324 size -= 1;
1325 if (register_count * 4 == size) {
1326 int I = vub300->dynamic_register_count = register_count;
1327 int i = 0;
1328 while (I--) {
1329 unsigned int func_num = 0;
1330 vub300->sdio_register[i].func_num = *data++;
1331 size -= 1;
1332 func_num += *data++;
1333 size -= 1;
1334 func_num <<= 8;
1335 func_num += *data++;
1336 size -= 1;
1337 func_num <<= 8;
1338 func_num += *data++;
1339 size -= 1;
1340 vub300->sdio_register[i].sdio_reg = func_num;
1341 vub300->sdio_register[i].activate = 1;
1342 vub300->sdio_register[i].prepared = 0;
1343 i += 1;
1344 }
1345 dev_info(&vub300->udev->dev,
1346 "initialized %d dynamic pseudocode registers\n",
1347 vub300->dynamic_register_count);
1348 return;
1349 } else {
1350 dev_err(&vub300->udev->dev,
1351 "corrupt dynamic registers in firmware %s\n",
1352 vub300->vub_name);
1353 strncpy(vub300->vub_name, "corrupt dynamic registers",
1354 sizeof(vub300->vub_name));
1355 return;
1356 }
1357 }
1358
1359 /*
1360 * if the binary containing the EMPTY PseudoCode can not be found
1361 * vub300->vub_name is set anyway in order to prevent an automatic retry
1362 */
1363 static void download_offload_pseudocode(struct vub300_mmc_host *vub300)
1364 {
1365 struct mmc_card *card = vub300->mmc->card;
1366 int sdio_funcs = card->sdio_funcs;
1367 const struct firmware *fw = NULL;
1368 int l = snprintf(vub300->vub_name, sizeof(vub300->vub_name),
1369 "vub_%04X%04X", card->cis.vendor, card->cis.device);
1370 int n = 0;
1371 int retval;
1372 for (n = 0; n < sdio_funcs; n++) {
1373 struct sdio_func *sf = card->sdio_func[n];
1374 l += snprintf(vub300->vub_name + l,
1375 sizeof(vub300->vub_name) - l, "_%04X%04X",
1376 sf->vendor, sf->device);
1377 };
1378 snprintf(vub300->vub_name + l, sizeof(vub300->vub_name) - l, ".bin");
1379 dev_info(&vub300->udev->dev, "requesting offload firmware %s\n",
1380 vub300->vub_name);
1381 retval = request_firmware(&fw, vub300->vub_name, &card->dev);
1382 if (retval < 0) {
1383 strncpy(vub300->vub_name, "vub_default.bin",
1384 sizeof(vub300->vub_name));
1385 retval = request_firmware(&fw, vub300->vub_name, &card->dev);
1386 if (retval < 0) {
1387 strncpy(vub300->vub_name,
1388 "no SDIO offload firmware found",
1389 sizeof(vub300->vub_name));
1390 } else {
1391 __download_offload_pseudocode(vub300, fw);
1392 release_firmware(fw);
1393 }
1394 } else {
1395 __download_offload_pseudocode(vub300, fw);
1396 release_firmware(fw);
1397 }
1398 }
1399
1400 static void vub300_usb_bulk_msg_completion(struct urb *urb)
1401 { /* urb completion handler - hardirq */
1402 complete((struct completion *)urb->context);
1403 }
1404
1405 static int vub300_usb_bulk_msg(struct vub300_mmc_host *vub300,
1406 unsigned int pipe, void *data, int len,
1407 int *actual_length, int timeout_msecs)
1408 {
1409 /* cmd_mutex is held by vub300_cmndwork_thread */
1410 struct usb_device *usb_dev = vub300->udev;
1411 struct completion done;
1412 int retval;
1413 vub300->urb = usb_alloc_urb(0, GFP_KERNEL);
1414 if (!vub300->urb)
1415 return -ENOMEM;
1416 usb_fill_bulk_urb(vub300->urb, usb_dev, pipe, data, len,
1417 vub300_usb_bulk_msg_completion, NULL);
1418 init_completion(&done);
1419 vub300->urb->context = &done;
1420 vub300->urb->actual_length = 0;
1421 retval = usb_submit_urb(vub300->urb, GFP_KERNEL);
1422 if (unlikely(retval))
1423 goto out;
1424 if (!wait_for_completion_timeout
1425 (&done, msecs_to_jiffies(timeout_msecs))) {
1426 retval = -ETIMEDOUT;
1427 usb_kill_urb(vub300->urb);
1428 } else {
1429 retval = vub300->urb->status;
1430 }
1431 out:
1432 *actual_length = vub300->urb->actual_length;
1433 usb_free_urb(vub300->urb);
1434 vub300->urb = NULL;
1435 return retval;
1436 }
1437
1438 static int __command_read_data(struct vub300_mmc_host *vub300,
1439 struct mmc_command *cmd, struct mmc_data *data)
1440 {
1441 /* cmd_mutex is held by vub300_cmndwork_thread */
1442 int linear_length = vub300->datasize;
1443 int padded_length = vub300->large_usb_packets ?
1444 ((511 + linear_length) >> 9) << 9 :
1445 ((63 + linear_length) >> 6) << 6;
1446 if ((padded_length == linear_length) || !pad_input_to_usb_pkt) {
1447 int result;
1448 unsigned pipe;
1449 pipe = usb_rcvbulkpipe(vub300->udev, vub300->data_inp_ep);
1450 result = usb_sg_init(&vub300->sg_request, vub300->udev,
1451 pipe, 0, data->sg,
1452 data->sg_len, 0, GFP_KERNEL);
1453 if (result < 0) {
1454 usb_unlink_urb(vub300->command_out_urb);
1455 usb_unlink_urb(vub300->command_res_urb);
1456 cmd->error = result;
1457 data->bytes_xfered = 0;
1458 return 0;
1459 } else {
1460 vub300->sg_transfer_timer.expires =
1461 jiffies + msecs_to_jiffies(2000 +
1462 (linear_length / 16384));
1463 add_timer(&vub300->sg_transfer_timer);
1464 usb_sg_wait(&vub300->sg_request);
1465 del_timer(&vub300->sg_transfer_timer);
1466 if (vub300->sg_request.status < 0) {
1467 cmd->error = vub300->sg_request.status;
1468 data->bytes_xfered = 0;
1469 return 0;
1470 } else {
1471 data->bytes_xfered = vub300->datasize;
1472 return linear_length;
1473 }
1474 }
1475 } else {
1476 u8 *buf = kmalloc(padded_length, GFP_KERNEL);
1477 if (buf) {
1478 int result;
1479 unsigned pipe = usb_rcvbulkpipe(vub300->udev,
1480 vub300->data_inp_ep);
1481 int actual_length = 0;
1482 result = vub300_usb_bulk_msg(vub300, pipe, buf,
1483 padded_length, &actual_length,
1484 2000 + (padded_length / 16384));
1485 if (result < 0) {
1486 cmd->error = result;
1487 data->bytes_xfered = 0;
1488 kfree(buf);
1489 return 0;
1490 } else if (actual_length < linear_length) {
1491 cmd->error = -EREMOTEIO;
1492 data->bytes_xfered = 0;
1493 kfree(buf);
1494 return 0;
1495 } else {
1496 sg_copy_from_buffer(data->sg, data->sg_len, buf,
1497 linear_length);
1498 kfree(buf);
1499 data->bytes_xfered = vub300->datasize;
1500 return linear_length;
1501 }
1502 } else {
1503 cmd->error = -ENOMEM;
1504 data->bytes_xfered = 0;
1505 return 0;
1506 }
1507 }
1508 }
1509
1510 static int __command_write_data(struct vub300_mmc_host *vub300,
1511 struct mmc_command *cmd, struct mmc_data *data)
1512 {
1513 /* cmd_mutex is held by vub300_cmndwork_thread */
1514 unsigned pipe = usb_sndbulkpipe(vub300->udev, vub300->data_out_ep);
1515 int linear_length = vub300->datasize;
1516 int modulo_64_length = linear_length & 0x003F;
1517 int modulo_512_length = linear_length & 0x01FF;
1518 if (linear_length < 64) {
1519 int result;
1520 int actual_length;
1521 sg_copy_to_buffer(data->sg, data->sg_len,
1522 vub300->padded_buffer,
1523 sizeof(vub300->padded_buffer));
1524 memset(vub300->padded_buffer + linear_length, 0,
1525 sizeof(vub300->padded_buffer) - linear_length);
1526 result = vub300_usb_bulk_msg(vub300, pipe, vub300->padded_buffer,
1527 sizeof(vub300->padded_buffer),
1528 &actual_length, 2000 +
1529 (sizeof(vub300->padded_buffer) /
1530 16384));
1531 if (result < 0) {
1532 cmd->error = result;
1533 data->bytes_xfered = 0;
1534 } else {
1535 data->bytes_xfered = vub300->datasize;
1536 }
1537 } else if ((!vub300->large_usb_packets && (0 < modulo_64_length)) ||
1538 (vub300->large_usb_packets && (64 > modulo_512_length))
1539 ) { /* don't you just love these work-rounds */
1540 int padded_length = ((63 + linear_length) >> 6) << 6;
1541 u8 *buf = kmalloc(padded_length, GFP_KERNEL);
1542 if (buf) {
1543 int result;
1544 int actual_length;
1545 sg_copy_to_buffer(data->sg, data->sg_len, buf,
1546 padded_length);
1547 memset(buf + linear_length, 0,
1548 padded_length - linear_length);
1549 result =
1550 vub300_usb_bulk_msg(vub300, pipe, buf,
1551 padded_length, &actual_length,
1552 2000 + padded_length / 16384);
1553 kfree(buf);
1554 if (result < 0) {
1555 cmd->error = result;
1556 data->bytes_xfered = 0;
1557 } else {
1558 data->bytes_xfered = vub300->datasize;
1559 }
1560 } else {
1561 cmd->error = -ENOMEM;
1562 data->bytes_xfered = 0;
1563 }
1564 } else { /* no data padding required */
1565 int result;
1566 unsigned char buf[64 * 4];
1567 sg_copy_to_buffer(data->sg, data->sg_len, buf, sizeof(buf));
1568 result = usb_sg_init(&vub300->sg_request, vub300->udev,
1569 pipe, 0, data->sg,
1570 data->sg_len, 0, GFP_KERNEL);
1571 if (result < 0) {
1572 usb_unlink_urb(vub300->command_out_urb);
1573 usb_unlink_urb(vub300->command_res_urb);
1574 cmd->error = result;
1575 data->bytes_xfered = 0;
1576 } else {
1577 vub300->sg_transfer_timer.expires =
1578 jiffies + msecs_to_jiffies(2000 +
1579 linear_length / 16384);
1580 add_timer(&vub300->sg_transfer_timer);
1581 usb_sg_wait(&vub300->sg_request);
1582 if (cmd->error) {
1583 data->bytes_xfered = 0;
1584 } else {
1585 del_timer(&vub300->sg_transfer_timer);
1586 if (vub300->sg_request.status < 0) {
1587 cmd->error = vub300->sg_request.status;
1588 data->bytes_xfered = 0;
1589 } else {
1590 data->bytes_xfered = vub300->datasize;
1591 }
1592 }
1593 }
1594 }
1595 return linear_length;
1596 }
1597
1598 static void __vub300_command_response(struct vub300_mmc_host *vub300,
1599 struct mmc_command *cmd,
1600 struct mmc_data *data, int data_length)
1601 {
1602 /* cmd_mutex is held by vub300_cmndwork_thread */
1603 long respretval;
1604 int msec_timeout = 1000 + data_length / 4;
1605 respretval =
1606 wait_for_completion_timeout(&vub300->command_complete,
1607 msecs_to_jiffies(msec_timeout));
1608 if (respretval == 0) { /* TIMED OUT */
1609 /* we don't know which of "out" and "res" if any failed */
1610 int result;
1611 vub300->usb_timed_out = 1;
1612 usb_kill_urb(vub300->command_out_urb);
1613 usb_kill_urb(vub300->command_res_urb);
1614 cmd->error = -ETIMEDOUT;
1615 result = usb_lock_device_for_reset(vub300->udev,
1616 vub300->interface);
1617 if (result == 0) {
1618 result = usb_reset_device(vub300->udev);
1619 usb_unlock_device(vub300->udev);
1620 }
1621 } else if (respretval < 0) {
1622 /* we don't know which of "out" and "res" if any failed */
1623 usb_kill_urb(vub300->command_out_urb);
1624 usb_kill_urb(vub300->command_res_urb);
1625 cmd->error = respretval;
1626 } else if (cmd->error) {
1627 /*
1628 * the error occurred sending the command
1629 * or receiving the response
1630 */
1631 } else if (vub300->command_out_urb->status) {
1632 vub300->usb_transport_fail = vub300->command_out_urb->status;
1633 cmd->error = -EPROTO == vub300->command_out_urb->status ?
1634 -ESHUTDOWN : vub300->command_out_urb->status;
1635 } else if (vub300->command_res_urb->status) {
1636 vub300->usb_transport_fail = vub300->command_res_urb->status;
1637 cmd->error = -EPROTO == vub300->command_res_urb->status ?
1638 -ESHUTDOWN : vub300->command_res_urb->status;
1639 } else if (vub300->resp.common.header_type == 0x00) {
1640 /*
1641 * the command completed successfully
1642 * and there was no piggybacked data
1643 */
1644 } else if (vub300->resp.common.header_type == RESPONSE_ERROR) {
1645 cmd->error =
1646 vub300_response_error(vub300->resp.error.error_code);
1647 if (vub300->data)
1648 usb_sg_cancel(&vub300->sg_request);
1649 } else if (vub300->resp.common.header_type == RESPONSE_PIGGYBACKED) {
1650 int offloaded_data_length =
1651 vub300->resp.common.header_size -
1652 sizeof(struct sd_register_header);
1653 int register_count = offloaded_data_length >> 3;
1654 int ri = 0;
1655 while (register_count--) {
1656 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
1657 ri += 1;
1658 }
1659 vub300->resp.common.header_size =
1660 sizeof(struct sd_register_header);
1661 vub300->resp.common.header_type = 0x00;
1662 cmd->error = 0;
1663 } else if (vub300->resp.common.header_type == RESPONSE_PIG_DISABLED) {
1664 int offloaded_data_length =
1665 vub300->resp.common.header_size -
1666 sizeof(struct sd_register_header);
1667 int register_count = offloaded_data_length >> 3;
1668 int ri = 0;
1669 while (register_count--) {
1670 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
1671 ri += 1;
1672 }
1673 mutex_lock(&vub300->irq_mutex);
1674 if (vub300->irqs_queued) {
1675 vub300->irqs_queued += 1;
1676 } else if (vub300->irq_enabled) {
1677 vub300->irqs_queued += 1;
1678 vub300_queue_poll_work(vub300, 0);
1679 } else {
1680 vub300->irqs_queued += 1;
1681 }
1682 vub300->irq_disabled = 1;
1683 mutex_unlock(&vub300->irq_mutex);
1684 vub300->resp.common.header_size =
1685 sizeof(struct sd_register_header);
1686 vub300->resp.common.header_type = 0x00;
1687 cmd->error = 0;
1688 } else if (vub300->resp.common.header_type == RESPONSE_PIG_ENABLED) {
1689 int offloaded_data_length =
1690 vub300->resp.common.header_size -
1691 sizeof(struct sd_register_header);
1692 int register_count = offloaded_data_length >> 3;
1693 int ri = 0;
1694 while (register_count--) {
1695 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
1696 ri += 1;
1697 }
1698 mutex_lock(&vub300->irq_mutex);
1699 if (vub300->irqs_queued) {
1700 vub300->irqs_queued += 1;
1701 } else if (vub300->irq_enabled) {
1702 vub300->irqs_queued += 1;
1703 vub300_queue_poll_work(vub300, 0);
1704 } else {
1705 vub300->irqs_queued += 1;
1706 }
1707 vub300->irq_disabled = 0;
1708 mutex_unlock(&vub300->irq_mutex);
1709 vub300->resp.common.header_size =
1710 sizeof(struct sd_register_header);
1711 vub300->resp.common.header_type = 0x00;
1712 cmd->error = 0;
1713 } else {
1714 cmd->error = -EINVAL;
1715 }
1716 }
1717
1718 static void construct_request_response(struct vub300_mmc_host *vub300,
1719 struct mmc_command *cmd)
1720 {
1721 int resp_len = vub300->resp_len;
1722 int less_cmd = (17 == resp_len) ? resp_len : resp_len - 1;
1723 int bytes = 3 & less_cmd;
1724 int words = less_cmd >> 2;
1725 u8 *r = vub300->resp.response.command_response;
1726 if (bytes == 3) {
1727 cmd->resp[words] = (r[1 + (words << 2)] << 24)
1728 | (r[2 + (words << 2)] << 16)
1729 | (r[3 + (words << 2)] << 8);
1730 } else if (bytes == 2) {
1731 cmd->resp[words] = (r[1 + (words << 2)] << 24)
1732 | (r[2 + (words << 2)] << 16);
1733 } else if (bytes == 1) {
1734 cmd->resp[words] = (r[1 + (words << 2)] << 24);
1735 }
1736 while (words-- > 0) {
1737 cmd->resp[words] = (r[1 + (words << 2)] << 24)
1738 | (r[2 + (words << 2)] << 16)
1739 | (r[3 + (words << 2)] << 8)
1740 | (r[4 + (words << 2)] << 0);
1741 }
1742 if ((cmd->opcode == 53) && (0x000000FF & cmd->resp[0]))
1743 cmd->resp[0] &= 0xFFFFFF00;
1744 }
1745
1746 /* this thread runs only when there is an upper level command req outstanding */
1747 static void vub300_cmndwork_thread(struct work_struct *work)
1748 {
1749 struct vub300_mmc_host *vub300 =
1750 container_of(work, struct vub300_mmc_host, cmndwork);
1751 if (!vub300->interface) {
1752 kref_put(&vub300->kref, vub300_delete);
1753 return;
1754 } else {
1755 struct mmc_request *req = vub300->req;
1756 struct mmc_command *cmd = vub300->cmd;
1757 struct mmc_data *data = vub300->data;
1758 int data_length;
1759 mutex_lock(&vub300->cmd_mutex);
1760 init_completion(&vub300->command_complete);
1761 if (likely(vub300->vub_name[0]) || !vub300->mmc->card ||
1762 !mmc_card_present(vub300->mmc->card)) {
1763 /*
1764 * the name of the EMPTY Pseudo firmware file
1765 * is used as a flag to indicate that the file
1766 * has been already downloaded to the VUB300 chip
1767 */
1768 } else if (0 == vub300->mmc->card->sdio_funcs) {
1769 strncpy(vub300->vub_name, "SD memory device",
1770 sizeof(vub300->vub_name));
1771 } else {
1772 download_offload_pseudocode(vub300);
1773 }
1774 send_command(vub300);
1775 if (!data)
1776 data_length = 0;
1777 else if (MMC_DATA_READ & data->flags)
1778 data_length = __command_read_data(vub300, cmd, data);
1779 else
1780 data_length = __command_write_data(vub300, cmd, data);
1781 __vub300_command_response(vub300, cmd, data, data_length);
1782 vub300->req = NULL;
1783 vub300->cmd = NULL;
1784 vub300->data = NULL;
1785 if (cmd->error) {
1786 if (cmd->error == -ENOMEDIUM)
1787 check_vub300_port_status(vub300);
1788 mutex_unlock(&vub300->cmd_mutex);
1789 mmc_request_done(vub300->mmc, req);
1790 kref_put(&vub300->kref, vub300_delete);
1791 return;
1792 } else {
1793 construct_request_response(vub300, cmd);
1794 vub300->resp_len = 0;
1795 mutex_unlock(&vub300->cmd_mutex);
1796 kref_put(&vub300->kref, vub300_delete);
1797 mmc_request_done(vub300->mmc, req);
1798 return;
1799 }
1800 }
1801 }
1802
1803 static int examine_cyclic_buffer(struct vub300_mmc_host *vub300,
1804 struct mmc_command *cmd, u8 Function)
1805 {
1806 /* cmd_mutex is held by vub300_mmc_request */
1807 u8 cmd0 = 0xFF & (cmd->arg >> 24);
1808 u8 cmd1 = 0xFF & (cmd->arg >> 16);
1809 u8 cmd2 = 0xFF & (cmd->arg >> 8);
1810 u8 cmd3 = 0xFF & (cmd->arg >> 0);
1811 int first = MAXREGMASK & vub300->fn[Function].offload_point;
1812 struct offload_registers_access *rf = &vub300->fn[Function].reg[first];
1813 if (cmd0 == rf->command_byte[0] &&
1814 cmd1 == rf->command_byte[1] &&
1815 cmd2 == rf->command_byte[2] &&
1816 cmd3 == rf->command_byte[3]) {
1817 u8 checksum = 0x00;
1818 cmd->resp[1] = checksum << 24;
1819 cmd->resp[0] = (rf->Respond_Byte[0] << 24)
1820 | (rf->Respond_Byte[1] << 16)
1821 | (rf->Respond_Byte[2] << 8)
1822 | (rf->Respond_Byte[3] << 0);
1823 vub300->fn[Function].offload_point += 1;
1824 vub300->fn[Function].offload_count -= 1;
1825 vub300->total_offload_count -= 1;
1826 return 1;
1827 } else {
1828 int delta = 1; /* because it does not match the first one */
1829 u8 register_count = vub300->fn[Function].offload_count - 1;
1830 u32 register_point = vub300->fn[Function].offload_point + 1;
1831 while (0 < register_count) {
1832 int point = MAXREGMASK & register_point;
1833 struct offload_registers_access *r =
1834 &vub300->fn[Function].reg[point];
1835 if (cmd0 == r->command_byte[0] &&
1836 cmd1 == r->command_byte[1] &&
1837 cmd2 == r->command_byte[2] &&
1838 cmd3 == r->command_byte[3]) {
1839 u8 checksum = 0x00;
1840 cmd->resp[1] = checksum << 24;
1841 cmd->resp[0] = (r->Respond_Byte[0] << 24)
1842 | (r->Respond_Byte[1] << 16)
1843 | (r->Respond_Byte[2] << 8)
1844 | (r->Respond_Byte[3] << 0);
1845 vub300->fn[Function].offload_point += delta;
1846 vub300->fn[Function].offload_count -= delta;
1847 vub300->total_offload_count -= delta;
1848 return 1;
1849 } else {
1850 register_point += 1;
1851 register_count -= 1;
1852 delta += 1;
1853 continue;
1854 }
1855 }
1856 return 0;
1857 }
1858 }
1859
1860 static int satisfy_request_from_offloaded_data(struct vub300_mmc_host *vub300,
1861 struct mmc_command *cmd)
1862 {
1863 /* cmd_mutex is held by vub300_mmc_request */
1864 u8 regs = vub300->dynamic_register_count;
1865 u8 i = 0;
1866 u8 func = FUN(cmd);
1867 u32 reg = REG(cmd);
1868 while (0 < regs--) {
1869 if ((vub300->sdio_register[i].func_num == func) &&
1870 (vub300->sdio_register[i].sdio_reg == reg)) {
1871 if (!vub300->sdio_register[i].prepared) {
1872 return 0;
1873 } else if ((0x80000000 & cmd->arg) == 0x80000000) {
1874 /*
1875 * a write to a dynamic register
1876 * nullifies our offloaded value
1877 */
1878 vub300->sdio_register[i].prepared = 0;
1879 return 0;
1880 } else {
1881 u8 checksum = 0x00;
1882 u8 rsp0 = 0x00;
1883 u8 rsp1 = 0x00;
1884 u8 rsp2 = vub300->sdio_register[i].response;
1885 u8 rsp3 = vub300->sdio_register[i].regvalue;
1886 vub300->sdio_register[i].prepared = 0;
1887 cmd->resp[1] = checksum << 24;
1888 cmd->resp[0] = (rsp0 << 24)
1889 | (rsp1 << 16)
1890 | (rsp2 << 8)
1891 | (rsp3 << 0);
1892 return 1;
1893 }
1894 } else {
1895 i += 1;
1896 continue;
1897 }
1898 };
1899 if (vub300->total_offload_count == 0)
1900 return 0;
1901 else if (vub300->fn[func].offload_count == 0)
1902 return 0;
1903 else
1904 return examine_cyclic_buffer(vub300, cmd, func);
1905 }
1906
1907 static void vub300_mmc_request(struct mmc_host *mmc, struct mmc_request *req)
1908 { /* NOT irq */
1909 struct mmc_command *cmd = req->cmd;
1910 struct vub300_mmc_host *vub300 = mmc_priv(mmc);
1911 if (!vub300->interface) {
1912 cmd->error = -ESHUTDOWN;
1913 mmc_request_done(mmc, req);
1914 return;
1915 } else {
1916 struct mmc_data *data = req->data;
1917 if (!vub300->card_powered) {
1918 cmd->error = -ENOMEDIUM;
1919 mmc_request_done(mmc, req);
1920 return;
1921 }
1922 if (!vub300->card_present) {
1923 cmd->error = -ENOMEDIUM;
1924 mmc_request_done(mmc, req);
1925 return;
1926 }
1927 if (vub300->usb_transport_fail) {
1928 cmd->error = vub300->usb_transport_fail;
1929 mmc_request_done(mmc, req);
1930 return;
1931 }
1932 if (!vub300->interface) {
1933 cmd->error = -ENODEV;
1934 mmc_request_done(mmc, req);
1935 return;
1936 }
1937 kref_get(&vub300->kref);
1938 mutex_lock(&vub300->cmd_mutex);
1939 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
1940 /*
1941 * for performance we have to return immediately
1942 * if the requested data has been offloaded
1943 */
1944 if (cmd->opcode == 52 &&
1945 satisfy_request_from_offloaded_data(vub300, cmd)) {
1946 cmd->error = 0;
1947 mutex_unlock(&vub300->cmd_mutex);
1948 kref_put(&vub300->kref, vub300_delete);
1949 mmc_request_done(mmc, req);
1950 return;
1951 } else {
1952 vub300->cmd = cmd;
1953 vub300->req = req;
1954 vub300->data = data;
1955 if (data)
1956 vub300->datasize = data->blksz * data->blocks;
1957 else
1958 vub300->datasize = 0;
1959 vub300_queue_cmnd_work(vub300);
1960 mutex_unlock(&vub300->cmd_mutex);
1961 kref_put(&vub300->kref, vub300_delete);
1962 /*
1963 * the kernel lock diagnostics complain
1964 * if the cmd_mutex * is "passed on"
1965 * to the cmndwork thread,
1966 * so we must release it now
1967 * and re-acquire it in the cmndwork thread
1968 */
1969 }
1970 }
1971 }
1972
1973 static void __set_clock_speed(struct vub300_mmc_host *vub300, u8 buf[8],
1974 struct mmc_ios *ios)
1975 {
1976 int buf_array_size = 8; /* ARRAY_SIZE(buf) does not work !!! */
1977 int retval;
1978 u32 kHzClock;
1979 if (ios->clock >= 48000000)
1980 kHzClock = 48000;
1981 else if (ios->clock >= 24000000)
1982 kHzClock = 24000;
1983 else if (ios->clock >= 20000000)
1984 kHzClock = 20000;
1985 else if (ios->clock >= 15000000)
1986 kHzClock = 15000;
1987 else if (ios->clock >= 200000)
1988 kHzClock = 200;
1989 else
1990 kHzClock = 0;
1991 {
1992 int i;
1993 u64 c = kHzClock;
1994 for (i = 0; i < buf_array_size; i++) {
1995 buf[i] = c;
1996 c >>= 8;
1997 }
1998 }
1999 retval =
2000 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
2001 SET_CLOCK_SPEED,
2002 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2003 0x00, 0x00, buf, buf_array_size, HZ);
2004 if (retval != 8) {
2005 dev_err(&vub300->udev->dev, "SET_CLOCK_SPEED"
2006 " %dkHz failed with retval=%d\n", kHzClock, retval);
2007 } else {
2008 dev_dbg(&vub300->udev->dev, "SET_CLOCK_SPEED"
2009 " %dkHz\n", kHzClock);
2010 }
2011 }
2012
2013 static void vub300_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
2014 { /* NOT irq */
2015 struct vub300_mmc_host *vub300 = mmc_priv(mmc);
2016 if (!vub300->interface)
2017 return;
2018 kref_get(&vub300->kref);
2019 mutex_lock(&vub300->cmd_mutex);
2020 if ((ios->power_mode == MMC_POWER_OFF) && vub300->card_powered) {
2021 vub300->card_powered = 0;
2022 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
2023 SET_SD_POWER,
2024 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2025 0x0000, 0x0000, NULL, 0, HZ);
2026 /* must wait for the VUB300 u-proc to boot up */
2027 msleep(600);
2028 } else if ((ios->power_mode == MMC_POWER_UP) && !vub300->card_powered) {
2029 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
2030 SET_SD_POWER,
2031 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2032 0x0001, 0x0000, NULL, 0, HZ);
2033 msleep(600);
2034 vub300->card_powered = 1;
2035 } else if (ios->power_mode == MMC_POWER_ON) {
2036 u8 *buf = kmalloc(8, GFP_KERNEL);
2037 if (buf) {
2038 __set_clock_speed(vub300, buf, ios);
2039 kfree(buf);
2040 }
2041 } else {
2042 /* this should mean no change of state */
2043 }
2044 mutex_unlock(&vub300->cmd_mutex);
2045 kref_put(&vub300->kref, vub300_delete);
2046 }
2047
2048 static int vub300_mmc_get_ro(struct mmc_host *mmc)
2049 {
2050 struct vub300_mmc_host *vub300 = mmc_priv(mmc);
2051 return vub300->read_only;
2052 }
2053
2054 static void vub300_enable_sdio_irq(struct mmc_host *mmc, int enable)
2055 { /* NOT irq */
2056 struct vub300_mmc_host *vub300 = mmc_priv(mmc);
2057 if (!vub300->interface)
2058 return;
2059 kref_get(&vub300->kref);
2060 if (enable) {
2061 mutex_lock(&vub300->irq_mutex);
2062 if (vub300->irqs_queued) {
2063 vub300->irqs_queued -= 1;
2064 mmc_signal_sdio_irq(vub300->mmc);
2065 } else if (vub300->irq_disabled) {
2066 vub300->irq_disabled = 0;
2067 vub300->irq_enabled = 1;
2068 vub300_queue_poll_work(vub300, 0);
2069 } else if (vub300->irq_enabled) {
2070 /* this should not happen, so we will just ignore it */
2071 } else {
2072 vub300->irq_enabled = 1;
2073 vub300_queue_poll_work(vub300, 0);
2074 }
2075 mutex_unlock(&vub300->irq_mutex);
2076 } else {
2077 vub300->irq_enabled = 0;
2078 }
2079 kref_put(&vub300->kref, vub300_delete);
2080 }
2081
2082 void vub300_init_card(struct mmc_host *mmc, struct mmc_card *card)
2083 { /* NOT irq */
2084 struct vub300_mmc_host *vub300 = mmc_priv(mmc);
2085 dev_info(&vub300->udev->dev, "NO host QUIRKS for this card\n");
2086 }
2087
2088 static struct mmc_host_ops vub300_mmc_ops = {
2089 .request = vub300_mmc_request,
2090 .set_ios = vub300_mmc_set_ios,
2091 .get_ro = vub300_mmc_get_ro,
2092 .enable_sdio_irq = vub300_enable_sdio_irq,
2093 .init_card = vub300_init_card,
2094 };
2095
2096 static int vub300_probe(struct usb_interface *interface,
2097 const struct usb_device_id *id)
2098 { /* NOT irq */
2099 struct vub300_mmc_host *vub300;
2100 struct usb_host_interface *iface_desc;
2101 struct usb_device *udev = usb_get_dev(interface_to_usbdev(interface));
2102 int i;
2103 int retval = -ENOMEM;
2104 struct urb *command_out_urb;
2105 struct urb *command_res_urb;
2106 struct mmc_host *mmc;
2107 char manufacturer[48];
2108 char product[32];
2109 char serial_number[32];
2110 usb_string(udev, udev->descriptor.iManufacturer, manufacturer,
2111 sizeof(manufacturer));
2112 usb_string(udev, udev->descriptor.iProduct, product, sizeof(product));
2113 usb_string(udev, udev->descriptor.iSerialNumber, serial_number,
2114 sizeof(serial_number));
2115 dev_info(&udev->dev, "probing VID:PID(%04X:%04X) %s %s %s\n",
2116 udev->descriptor.idVendor, udev->descriptor.idProduct,
2117 manufacturer, product, serial_number);
2118 command_out_urb = usb_alloc_urb(0, GFP_KERNEL);
2119 if (!command_out_urb) {
2120 retval = -ENOMEM;
2121 dev_err(&udev->dev, "not enough memory for command_out_urb\n");
2122 goto error0;
2123 }
2124 command_res_urb = usb_alloc_urb(0, GFP_KERNEL);
2125 if (!command_res_urb) {
2126 retval = -ENOMEM;
2127 dev_err(&udev->dev, "not enough memory for command_res_urb\n");
2128 goto error1;
2129 }
2130 /* this also allocates memory for our VUB300 mmc host device */
2131 mmc = mmc_alloc_host(sizeof(struct vub300_mmc_host), &udev->dev);
2132 if (!mmc) {
2133 retval = -ENOMEM;
2134 dev_err(&udev->dev, "not enough memory for the mmc_host\n");
2135 goto error4;
2136 }
2137 /* MMC core transfer sizes tunable parameters */
2138 mmc->caps = 0;
2139 if (!force_1_bit_data_xfers)
2140 mmc->caps |= MMC_CAP_4_BIT_DATA;
2141 if (!force_polling_for_irqs)
2142 mmc->caps |= MMC_CAP_SDIO_IRQ;
2143 mmc->caps &= ~MMC_CAP_NEEDS_POLL;
2144 /*
2145 * MMC_CAP_NEEDS_POLL causes core.c:mmc_rescan() to poll
2146 * for devices which results in spurious CMD7's being
2147 * issued which stops some SDIO cards from working
2148 */
2149 if (limit_speed_to_24_MHz) {
2150 mmc->caps |= MMC_CAP_MMC_HIGHSPEED;
2151 mmc->caps |= MMC_CAP_SD_HIGHSPEED;
2152 mmc->f_max = 24000000;
2153 dev_info(&udev->dev, "limiting SDIO speed to 24_MHz\n");
2154 } else {
2155 mmc->caps |= MMC_CAP_MMC_HIGHSPEED;
2156 mmc->caps |= MMC_CAP_SD_HIGHSPEED;
2157 mmc->f_max = 48000000;
2158 }
2159 mmc->f_min = 200000;
2160 mmc->max_blk_count = 511;
2161 mmc->max_blk_size = 512;
2162 mmc->max_segs = 128;
2163 if (force_max_req_size)
2164 mmc->max_req_size = force_max_req_size * 1024;
2165 else
2166 mmc->max_req_size = 64 * 1024;
2167 mmc->max_seg_size = mmc->max_req_size;
2168 mmc->ocr_avail = 0;
2169 mmc->ocr_avail |= MMC_VDD_165_195;
2170 mmc->ocr_avail |= MMC_VDD_20_21;
2171 mmc->ocr_avail |= MMC_VDD_21_22;
2172 mmc->ocr_avail |= MMC_VDD_22_23;
2173 mmc->ocr_avail |= MMC_VDD_23_24;
2174 mmc->ocr_avail |= MMC_VDD_24_25;
2175 mmc->ocr_avail |= MMC_VDD_25_26;
2176 mmc->ocr_avail |= MMC_VDD_26_27;
2177 mmc->ocr_avail |= MMC_VDD_27_28;
2178 mmc->ocr_avail |= MMC_VDD_28_29;
2179 mmc->ocr_avail |= MMC_VDD_29_30;
2180 mmc->ocr_avail |= MMC_VDD_30_31;
2181 mmc->ocr_avail |= MMC_VDD_31_32;
2182 mmc->ocr_avail |= MMC_VDD_32_33;
2183 mmc->ocr_avail |= MMC_VDD_33_34;
2184 mmc->ocr_avail |= MMC_VDD_34_35;
2185 mmc->ocr_avail |= MMC_VDD_35_36;
2186 mmc->ops = &vub300_mmc_ops;
2187 vub300 = mmc_priv(mmc);
2188 vub300->mmc = mmc;
2189 vub300->card_powered = 0;
2190 vub300->bus_width = 0;
2191 vub300->cmnd.head.block_size[0] = 0x00;
2192 vub300->cmnd.head.block_size[1] = 0x00;
2193 vub300->app_spec = 0;
2194 mutex_init(&vub300->cmd_mutex);
2195 mutex_init(&vub300->irq_mutex);
2196 vub300->command_out_urb = command_out_urb;
2197 vub300->command_res_urb = command_res_urb;
2198 vub300->usb_timed_out = 0;
2199 vub300->dynamic_register_count = 0;
2200
2201 for (i = 0; i < ARRAY_SIZE(vub300->fn); i++) {
2202 vub300->fn[i].offload_point = 0;
2203 vub300->fn[i].offload_count = 0;
2204 }
2205
2206 vub300->total_offload_count = 0;
2207 vub300->irq_enabled = 0;
2208 vub300->irq_disabled = 0;
2209 vub300->irqs_queued = 0;
2210
2211 for (i = 0; i < ARRAY_SIZE(vub300->sdio_register); i++)
2212 vub300->sdio_register[i++].activate = 0;
2213
2214 vub300->udev = udev;
2215 vub300->interface = interface;
2216 vub300->cmnd_res_ep = 0;
2217 vub300->cmnd_out_ep = 0;
2218 vub300->data_inp_ep = 0;
2219 vub300->data_out_ep = 0;
2220
2221 for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++)
2222 vub300->fbs[i] = 512;
2223
2224 /*
2225 * set up the endpoint information
2226 *
2227 * use the first pair of bulk-in and bulk-out
2228 * endpoints for Command/Response+Interrupt
2229 *
2230 * use the second pair of bulk-in and bulk-out
2231 * endpoints for Data In/Out
2232 */
2233 vub300->large_usb_packets = 0;
2234 iface_desc = interface->cur_altsetting;
2235 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2236 struct usb_endpoint_descriptor *endpoint =
2237 &iface_desc->endpoint[i].desc;
2238 dev_info(&vub300->udev->dev,
2239 "vub300 testing %s EndPoint(%d) %02X\n",
2240 usb_endpoint_is_bulk_in(endpoint) ? "BULK IN" :
2241 usb_endpoint_is_bulk_out(endpoint) ? "BULK OUT" :
2242 "UNKNOWN", i, endpoint->bEndpointAddress);
2243 if (endpoint->wMaxPacketSize > 64)
2244 vub300->large_usb_packets = 1;
2245 if (usb_endpoint_is_bulk_in(endpoint)) {
2246 if (!vub300->cmnd_res_ep) {
2247 vub300->cmnd_res_ep =
2248 endpoint->bEndpointAddress;
2249 } else if (!vub300->data_inp_ep) {
2250 vub300->data_inp_ep =
2251 endpoint->bEndpointAddress;
2252 } else {
2253 dev_warn(&vub300->udev->dev,
2254 "ignoring"
2255 " unexpected bulk_in endpoint");
2256 }
2257 } else if (usb_endpoint_is_bulk_out(endpoint)) {
2258 if (!vub300->cmnd_out_ep) {
2259 vub300->cmnd_out_ep =
2260 endpoint->bEndpointAddress;
2261 } else if (!vub300->data_out_ep) {
2262 vub300->data_out_ep =
2263 endpoint->bEndpointAddress;
2264 } else {
2265 dev_warn(&vub300->udev->dev,
2266 "ignoring"
2267 " unexpected bulk_out endpoint");
2268 }
2269 } else {
2270 dev_warn(&vub300->udev->dev,
2271 "vub300 ignoring EndPoint(%d) %02X", i,
2272 endpoint->bEndpointAddress);
2273 }
2274 }
2275 if (vub300->cmnd_res_ep && vub300->cmnd_out_ep &&
2276 vub300->data_inp_ep && vub300->data_out_ep) {
2277 dev_info(&vub300->udev->dev,
2278 "vub300 %s packets"
2279 " using EndPoints %02X %02X %02X %02X\n",
2280 vub300->large_usb_packets ? "LARGE" : "SMALL",
2281 vub300->cmnd_out_ep, vub300->cmnd_res_ep,
2282 vub300->data_out_ep, vub300->data_inp_ep);
2283 /* we have the expected EndPoints */
2284 } else {
2285 dev_err(&vub300->udev->dev,
2286 "Could not find two sets of bulk-in/out endpoint pairs\n");
2287 retval = -EINVAL;
2288 goto error5;
2289 }
2290 retval =
2291 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
2292 GET_HC_INF0,
2293 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2294 0x0000, 0x0000, &vub300->hc_info,
2295 sizeof(vub300->hc_info), HZ);
2296 if (retval < 0)
2297 goto error5;
2298 retval =
2299 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
2300 SET_ROM_WAIT_STATES,
2301 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2302 firmware_rom_wait_states, 0x0000, NULL, 0, HZ);
2303 if (retval < 0)
2304 goto error5;
2305 dev_info(&vub300->udev->dev,
2306 "operating_mode = %s %s %d MHz %s %d byte USB packets\n",
2307 (mmc->caps & MMC_CAP_SDIO_IRQ) ? "IRQs" : "POLL",
2308 (mmc->caps & MMC_CAP_4_BIT_DATA) ? "4-bit" : "1-bit",
2309 mmc->f_max / 1000000,
2310 pad_input_to_usb_pkt ? "padding input data to" : "with",
2311 vub300->large_usb_packets ? 512 : 64);
2312 retval =
2313 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
2314 GET_SYSTEM_PORT_STATUS,
2315 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2316 0x0000, 0x0000, &vub300->system_port_status,
2317 sizeof(vub300->system_port_status), HZ);
2318 if (retval < 0) {
2319 goto error4;
2320 } else if (sizeof(vub300->system_port_status) == retval) {
2321 vub300->card_present =
2322 (0x0001 & vub300->system_port_status.port_flags) ? 1 : 0;
2323 vub300->read_only =
2324 (0x0010 & vub300->system_port_status.port_flags) ? 1 : 0;
2325 } else {
2326 goto error4;
2327 }
2328 usb_set_intfdata(interface, vub300);
2329 INIT_DELAYED_WORK(&vub300->pollwork, vub300_pollwork_thread);
2330 INIT_WORK(&vub300->cmndwork, vub300_cmndwork_thread);
2331 INIT_WORK(&vub300->deadwork, vub300_deadwork_thread);
2332 kref_init(&vub300->kref);
2333 init_timer(&vub300->sg_transfer_timer);
2334 vub300->sg_transfer_timer.data = (unsigned long)vub300;
2335 vub300->sg_transfer_timer.function = vub300_sg_timed_out;
2336 kref_get(&vub300->kref);
2337 init_timer(&vub300->inactivity_timer);
2338 vub300->inactivity_timer.data = (unsigned long)vub300;
2339 vub300->inactivity_timer.function = vub300_inactivity_timer_expired;
2340 vub300->inactivity_timer.expires = jiffies + HZ;
2341 add_timer(&vub300->inactivity_timer);
2342 if (vub300->card_present)
2343 dev_info(&vub300->udev->dev,
2344 "USB vub300 remote SDIO host controller[%d]"
2345 "connected with SD/SDIO card inserted\n",
2346 interface_to_InterfaceNumber(interface));
2347 else
2348 dev_info(&vub300->udev->dev,
2349 "USB vub300 remote SDIO host controller[%d]"
2350 "connected with no SD/SDIO card inserted\n",
2351 interface_to_InterfaceNumber(interface));
2352 mmc_add_host(mmc);
2353 return 0;
2354 error5:
2355 mmc_free_host(mmc);
2356 /*
2357 * and hence also frees vub300
2358 * which is contained at the end of struct mmc
2359 */
2360 error4:
2361 usb_free_urb(command_out_urb);
2362 error1:
2363 usb_free_urb(command_res_urb);
2364 error0:
2365 return retval;
2366 }
2367
2368 static void vub300_disconnect(struct usb_interface *interface)
2369 { /* NOT irq */
2370 struct vub300_mmc_host *vub300 = usb_get_intfdata(interface);
2371 if (!vub300 || !vub300->mmc) {
2372 return;
2373 } else {
2374 struct mmc_host *mmc = vub300->mmc;
2375 if (!vub300->mmc) {
2376 return;
2377 } else {
2378 int ifnum = interface_to_InterfaceNumber(interface);
2379 usb_set_intfdata(interface, NULL);
2380 /* prevent more I/O from starting */
2381 vub300->interface = NULL;
2382 kref_put(&vub300->kref, vub300_delete);
2383 mmc_remove_host(mmc);
2384 pr_info("USB vub300 remote SDIO host controller[%d]"
2385 " now disconnected", ifnum);
2386 return;
2387 }
2388 }
2389 }
2390
2391 #ifdef CONFIG_PM
2392 static int vub300_suspend(struct usb_interface *intf, pm_message_t message)
2393 {
2394 struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
2395 if (!vub300 || !vub300->mmc) {
2396 return 0;
2397 } else {
2398 struct mmc_host *mmc = vub300->mmc;
2399 mmc_suspend_host(mmc);
2400 return 0;
2401 }
2402 }
2403
2404 static int vub300_resume(struct usb_interface *intf)
2405 {
2406 struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
2407 if (!vub300 || !vub300->mmc) {
2408 return 0;
2409 } else {
2410 struct mmc_host *mmc = vub300->mmc;
2411 mmc_resume_host(mmc);
2412 return 0;
2413 }
2414 }
2415 #else
2416 #define vub300_suspend NULL
2417 #define vub300_resume NULL
2418 #endif
2419 static int vub300_pre_reset(struct usb_interface *intf)
2420 { /* NOT irq */
2421 struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
2422 mutex_lock(&vub300->cmd_mutex);
2423 return 0;
2424 }
2425
2426 static int vub300_post_reset(struct usb_interface *intf)
2427 { /* NOT irq */
2428 struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
2429 /* we are sure no URBs are active - no locking needed */
2430 vub300->errors = -EPIPE;
2431 mutex_unlock(&vub300->cmd_mutex);
2432 return 0;
2433 }
2434
2435 static struct usb_driver vub300_driver = {
2436 .name = "vub300",
2437 .probe = vub300_probe,
2438 .disconnect = vub300_disconnect,
2439 .suspend = vub300_suspend,
2440 .resume = vub300_resume,
2441 .pre_reset = vub300_pre_reset,
2442 .post_reset = vub300_post_reset,
2443 .id_table = vub300_table,
2444 .supports_autosuspend = 1,
2445 };
2446
2447 static int __init vub300_init(void)
2448 { /* NOT irq */
2449 int result;
2450
2451 pr_info("VUB300 Driver rom wait states = %02X irqpoll timeout = %04X",
2452 firmware_rom_wait_states, 0x0FFFF & firmware_irqpoll_timeout);
2453 cmndworkqueue = create_singlethread_workqueue("kvub300c");
2454 if (!cmndworkqueue) {
2455 pr_err("not enough memory for the REQUEST workqueue");
2456 result = -ENOMEM;
2457 goto out1;
2458 }
2459 pollworkqueue = create_singlethread_workqueue("kvub300p");
2460 if (!pollworkqueue) {
2461 pr_err("not enough memory for the IRQPOLL workqueue");
2462 result = -ENOMEM;
2463 goto out2;
2464 }
2465 deadworkqueue = create_singlethread_workqueue("kvub300d");
2466 if (!deadworkqueue) {
2467 pr_err("not enough memory for the EXPIRED workqueue");
2468 result = -ENOMEM;
2469 goto out3;
2470 }
2471 result = usb_register(&vub300_driver);
2472 if (result) {
2473 pr_err("usb_register failed. Error number %d", result);
2474 goto out4;
2475 }
2476 return 0;
2477 out4:
2478 destroy_workqueue(deadworkqueue);
2479 out3:
2480 destroy_workqueue(pollworkqueue);
2481 out2:
2482 destroy_workqueue(cmndworkqueue);
2483 out1:
2484 return result;
2485 }
2486
2487 static void __exit vub300_exit(void)
2488 {
2489 usb_deregister(&vub300_driver);
2490 flush_workqueue(cmndworkqueue);
2491 flush_workqueue(pollworkqueue);
2492 flush_workqueue(deadworkqueue);
2493 destroy_workqueue(cmndworkqueue);
2494 destroy_workqueue(pollworkqueue);
2495 destroy_workqueue(deadworkqueue);
2496 }
2497
2498 module_init(vub300_init);
2499 module_exit(vub300_exit);
2500
2501 MODULE_AUTHOR("Tony Olech <tony.olech@elandigitalsystems.com>");
2502 MODULE_DESCRIPTION("VUB300 USB to SD/MMC/SDIO adapter driver");
2503 MODULE_LICENSE("GPL");