1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Remote VUB300 SDIO/SDmem Host Controller Driver
4 *
5 * Copyright (C) 2010 Elan Digital Systems Limited
6 *
7 * based on USB Skeleton driver - 2.2
8 *
9 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
10 *
11 * VUB300: is a USB 2.0 client device with a single SDIO/SDmem/MMC slot
12 * Any SDIO/SDmem/MMC device plugged into the VUB300 will appear,
13 * by virtue of this driver, to have been plugged into a local
14 * SDIO host controller, similar to, say, a PCI Ricoh controller
15 * This is because this kernel device driver is both a USB 2.0
16 * client device driver AND an MMC host controller driver. Thus
17 * if there is an existing driver for the inserted SDIO/SDmem/MMC
18 * device then that driver will be used by the kernel to manage
19 * the device in exactly the same fashion as if it had been
20 * directly plugged into, say, a local pci bus Ricoh controller
21 *
22 * RANT: this driver was written using a display 128x48 - converting it
23 * to a line width of 80 makes it very difficult to support. In
24 * particular functions have been broken down into sub functions
25 * and the original meaningful names have been shortened into
26 * cryptic ones.
27 * The problem is that executing a fragment of code subject to
28 * two conditions means an indentation of 24, thus leaving only
29 * 56 characters for a C statement. And that is quite ridiculous!
30 *
31 * Data types: data passed to/from the VUB300 is fixed to a number of
32 * bits and driver data fields reflect that limit by using
33 * u8, u16, u32
34 */
35 #include <linux/kernel.h>
36 #include <linux/errno.h>
37 #include <linux/init.h>
38 #include <linux/slab.h>
39 #include <linux/module.h>
40 #include <linux/kref.h>
41 #include <linux/uaccess.h>
42 #include <linux/usb.h>
43 #include <linux/mutex.h>
44 #include <linux/mmc/host.h>
45 #include <linux/mmc/card.h>
46 #include <linux/mmc/sdio_func.h>
47 #include <linux/mmc/sdio_ids.h>
48 #include <linux/workqueue.h>
49 #include <linux/ctype.h>
50 #include <linux/firmware.h>
51 #include <linux/scatterlist.h>
52
53 struct host_controller_info {
54 u8 info_size;
55 u16 firmware_version;
56 u8 number_of_ports;
57 } __packed;
58
59 #define FIRMWARE_BLOCK_BOUNDARY 1024
60 struct sd_command_header {
61 u8 header_size;
62 u8 header_type;
63 u8 port_number;
64 u8 command_type; /* Bit7 - Rd/Wr */
65 u8 command_index;
66 u8 transfer_size[4]; /* ReadSize + ReadSize */
67 u8 response_type;
68 u8 arguments[4];
69 u8 block_count[2];
70 u8 block_size[2];
71 u8 block_boundary[2];
72 u8 reserved[44]; /* to pad out to 64 bytes */
73 } __packed;
74
75 struct sd_irqpoll_header {
76 u8 header_size;
77 u8 header_type;
78 u8 port_number;
79 u8 command_type; /* Bit7 - Rd/Wr */
80 u8 padding[16]; /* don't ask why !! */
81 u8 poll_timeout_msb;
82 u8 poll_timeout_lsb;
83 u8 reserved[42]; /* to pad out to 64 bytes */
84 } __packed;
85
86 struct sd_common_header {
87 u8 header_size;
88 u8 header_type;
89 u8 port_number;
90 } __packed;
91
92 struct sd_response_header {
93 u8 header_size;
94 u8 header_type;
95 u8 port_number;
96 u8 command_type;
97 u8 command_index;
98 u8 command_response[];
99 } __packed;
100
101 struct sd_status_header {
102 u8 header_size;
103 u8 header_type;
104 u8 port_number;
105 u16 port_flags;
106 u32 sdio_clock;
107 u16 host_header_size;
108 u16 func_header_size;
109 u16 ctrl_header_size;
110 } __packed;
111
112 struct sd_error_header {
113 u8 header_size;
114 u8 header_type;
115 u8 port_number;
116 u8 error_code;
117 } __packed;
118
119 struct sd_interrupt_header {
120 u8 header_size;
121 u8 header_type;
122 u8 port_number;
123 } __packed;
124
125 struct offload_registers_access {
126 u8 command_byte[4];
127 u8 Respond_Byte[4];
128 } __packed;
129
130 #define INTERRUPT_REGISTER_ACCESSES 15
131 struct sd_offloaded_interrupt {
132 u8 header_size;
133 u8 header_type;
134 u8 port_number;
135 struct offload_registers_access reg[INTERRUPT_REGISTER_ACCESSES];
136 } __packed;
137
138 struct sd_register_header {
139 u8 header_size;
140 u8 header_type;
141 u8 port_number;
142 u8 command_type;
143 u8 command_index;
144 u8 command_response[6];
145 } __packed;
146
147 #define PIGGYBACK_REGISTER_ACCESSES 14
148 struct sd_offloaded_piggyback {
149 struct sd_register_header sdio;
150 struct offload_registers_access reg[PIGGYBACK_REGISTER_ACCESSES];
151 } __packed;
152
153 union sd_response {
154 struct sd_common_header common;
155 struct sd_status_header status;
156 struct sd_error_header error;
157 struct sd_interrupt_header interrupt;
158 struct sd_response_header response;
159 struct sd_offloaded_interrupt irq;
160 struct sd_offloaded_piggyback pig;
161 } __packed;
162
163 union sd_command {
164 struct sd_command_header head;
165 struct sd_irqpoll_header poll;
166 } __packed;
167
168 enum SD_RESPONSE_TYPE {
169 SDRT_UNSPECIFIED = 0,
170 SDRT_NONE,
171 SDRT_1,
172 SDRT_1B,
173 SDRT_2,
174 SDRT_3,
175 SDRT_4,
176 SDRT_5,
177 SDRT_5B,
178 SDRT_6,
179 SDRT_7,
180 };
181
182 #define RESPONSE_INTERRUPT 0x01
183 #define RESPONSE_ERROR 0x02
184 #define RESPONSE_STATUS 0x03
185 #define RESPONSE_IRQ_DISABLED 0x05
186 #define RESPONSE_IRQ_ENABLED 0x06
187 #define RESPONSE_PIGGYBACKED 0x07
188 #define RESPONSE_NO_INTERRUPT 0x08
189 #define RESPONSE_PIG_DISABLED 0x09
190 #define RESPONSE_PIG_ENABLED 0x0A
191 #define SD_ERROR_1BIT_TIMEOUT 0x01
192 #define SD_ERROR_4BIT_TIMEOUT 0x02
193 #define SD_ERROR_1BIT_CRC_WRONG 0x03
194 #define SD_ERROR_4BIT_CRC_WRONG 0x04
195 #define SD_ERROR_1BIT_CRC_ERROR 0x05
196 #define SD_ERROR_4BIT_CRC_ERROR 0x06
197 #define SD_ERROR_NO_CMD_ENDBIT 0x07
198 #define SD_ERROR_NO_1BIT_DATEND 0x08
199 #define SD_ERROR_NO_4BIT_DATEND 0x09
200 #define SD_ERROR_1BIT_UNEXPECTED_TIMEOUT 0x0A
201 #define SD_ERROR_4BIT_UNEXPECTED_TIMEOUT 0x0B
202 #define SD_ERROR_ILLEGAL_COMMAND 0x0C
203 #define SD_ERROR_NO_DEVICE 0x0D
204 #define SD_ERROR_TRANSFER_LENGTH 0x0E
205 #define SD_ERROR_1BIT_DATA_TIMEOUT 0x0F
206 #define SD_ERROR_4BIT_DATA_TIMEOUT 0x10
207 #define SD_ERROR_ILLEGAL_STATE 0x11
208 #define SD_ERROR_UNKNOWN_ERROR 0x12
209 #define SD_ERROR_RESERVED_ERROR 0x13
210 #define SD_ERROR_INVALID_FUNCTION 0x14
211 #define SD_ERROR_OUT_OF_RANGE 0x15
212 #define SD_ERROR_STAT_CMD 0x16
213 #define SD_ERROR_STAT_DATA 0x17
214 #define SD_ERROR_STAT_CMD_TIMEOUT 0x18
215 #define SD_ERROR_SDCRDY_STUCK 0x19
216 #define SD_ERROR_UNHANDLED 0x1A
217 #define SD_ERROR_OVERRUN 0x1B
218 #define SD_ERROR_PIO_TIMEOUT 0x1C
219
220 #define FUN(c) (0x000007 & (c->arg>>28))
221 #define REG(c) (0x01FFFF & (c->arg>>9))
222
223 static bool limit_speed_to_24_MHz;
224 module_param(limit_speed_to_24_MHz, bool, 0644);
225 MODULE_PARM_DESC(limit_speed_to_24_MHz, "Limit Max SDIO Clock Speed to 24 MHz");
226
227 static bool pad_input_to_usb_pkt;
228 module_param(pad_input_to_usb_pkt, bool, 0644);
229 MODULE_PARM_DESC(pad_input_to_usb_pkt,
230 "Pad USB data input transfers to whole USB Packet");
231
232 static bool disable_offload_processing;
233 module_param(disable_offload_processing, bool, 0644);
234 MODULE_PARM_DESC(disable_offload_processing, "Disable Offload Processing");
235
236 static bool force_1_bit_data_xfers;
237 module_param(force_1_bit_data_xfers, bool, 0644);
238 MODULE_PARM_DESC(force_1_bit_data_xfers,
239 "Force SDIO Data Transfers to 1-bit Mode");
240
241 static bool force_polling_for_irqs;
242 module_param(force_polling_for_irqs, bool, 0644);
243 MODULE_PARM_DESC(force_polling_for_irqs, "Force Polling for SDIO interrupts");
244
245 static int firmware_irqpoll_timeout = 1024;
246 module_param(firmware_irqpoll_timeout, int, 0644);
247 MODULE_PARM_DESC(firmware_irqpoll_timeout, "VUB300 firmware irqpoll timeout");
248
249 static int force_max_req_size = 128;
250 module_param(force_max_req_size, int, 0644);
251 MODULE_PARM_DESC(force_max_req_size, "set max request size in kBytes");
252
253 #ifdef SMSC_DEVELOPMENT_BOARD
254 static int firmware_rom_wait_states = 0x04;
255 #else
256 static int firmware_rom_wait_states = 0x1C;
257 #endif
258
259 module_param(firmware_rom_wait_states, int, 0644);
260 MODULE_PARM_DESC(firmware_rom_wait_states,
261 "ROM wait states byte=RRRIIEEE (Reserved Internal External)");
262
263 #define ELAN_VENDOR_ID 0x2201
264 #define VUB300_VENDOR_ID 0x0424
265 #define VUB300_PRODUCT_ID 0x012C
266 static const struct usb_device_id vub300_table[] = {
267 {USB_DEVICE(ELAN_VENDOR_ID, VUB300_PRODUCT_ID)},
268 {USB_DEVICE(VUB300_VENDOR_ID, VUB300_PRODUCT_ID)},
269 {} /* Terminating entry */
270 };
271 MODULE_DEVICE_TABLE(usb, vub300_table);
272
273 static struct workqueue_struct *cmndworkqueue;
274 static struct workqueue_struct *pollworkqueue;
275 static struct workqueue_struct *deadworkqueue;
276
interface_to_InterfaceNumber(struct usb_interface * interface)277 static inline int interface_to_InterfaceNumber(struct usb_interface *interface)
278 {
279 if (!interface)
280 return -1;
281 if (!interface->cur_altsetting)
282 return -1;
283 return interface->cur_altsetting->desc.bInterfaceNumber;
284 }
285
286 struct sdio_register {
287 unsigned func_num:3;
288 unsigned sdio_reg:17;
289 unsigned activate:1;
290 unsigned prepared:1;
291 unsigned regvalue:8;
292 unsigned response:8;
293 unsigned sparebit:26;
294 };
295
296 struct vub300_mmc_host {
297 struct usb_device *udev;
298 struct usb_interface *interface;
299 struct kref kref;
300 struct mutex cmd_mutex;
301 struct mutex irq_mutex;
302 char vub_name[3 + (9 * 8) + 4 + 1]; /* max of 7 sdio fn's */
303 u8 cmnd_out_ep; /* EndPoint for commands */
304 u8 cmnd_res_ep; /* EndPoint for responses */
305 u8 data_out_ep; /* EndPoint for out data */
306 u8 data_inp_ep; /* EndPoint for inp data */
307 bool card_powered;
308 bool card_present;
309 bool read_only;
310 bool large_usb_packets;
311 bool app_spec; /* ApplicationSpecific */
312 bool irq_enabled; /* by the MMC CORE */
313 bool irq_disabled; /* in the firmware */
314 unsigned bus_width:4;
315 u8 total_offload_count;
316 u8 dynamic_register_count;
317 u8 resp_len;
318 u32 datasize;
319 int errors;
320 int usb_transport_fail;
321 int usb_timed_out;
322 int irqs_queued;
323 struct sdio_register sdio_register[16];
324 struct offload_interrupt_function_register {
325 #define MAXREGBITS 4
326 #define MAXREGS (1<<MAXREGBITS)
327 #define MAXREGMASK (MAXREGS-1)
328 u8 offload_count;
329 u32 offload_point;
330 struct offload_registers_access reg[MAXREGS];
331 } fn[8];
332 u16 fbs[8]; /* Function Block Size */
333 struct mmc_command *cmd;
334 struct mmc_request *req;
335 struct mmc_data *data;
336 struct mmc_host *mmc;
337 struct urb *urb;
338 struct urb *command_out_urb;
339 struct urb *command_res_urb;
340 struct completion command_complete;
341 struct completion irqpoll_complete;
342 union sd_command cmnd;
343 union sd_response resp;
344 struct timer_list sg_transfer_timer;
345 struct usb_sg_request sg_request;
346 struct timer_list inactivity_timer;
347 struct work_struct deadwork;
348 struct work_struct cmndwork;
349 struct delayed_work pollwork;
350 struct host_controller_info hc_info;
351 struct sd_status_header system_port_status;
352 u8 padded_buffer[64];
353 };
354
355 #define kref_to_vub300_mmc_host(d) container_of(d, struct vub300_mmc_host, kref)
356 #define SET_TRANSFER_PSEUDOCODE 21
357 #define SET_INTERRUPT_PSEUDOCODE 20
358 #define SET_FAILURE_MODE 18
359 #define SET_ROM_WAIT_STATES 16
360 #define SET_IRQ_ENABLE 13
361 #define SET_CLOCK_SPEED 11
362 #define SET_FUNCTION_BLOCK_SIZE 9
363 #define SET_SD_DATA_MODE 6
364 #define SET_SD_POWER 4
365 #define ENTER_DFU_MODE 3
366 #define GET_HC_INF0 1
367 #define GET_SYSTEM_PORT_STATUS 0
368
vub300_delete(struct kref * kref)369 static void vub300_delete(struct kref *kref)
370 { /* kref callback - softirq */
371 struct vub300_mmc_host *vub300 = kref_to_vub300_mmc_host(kref);
372 struct mmc_host *mmc = vub300->mmc;
373 usb_free_urb(vub300->command_out_urb);
374 vub300->command_out_urb = NULL;
375 usb_free_urb(vub300->command_res_urb);
376 vub300->command_res_urb = NULL;
377 usb_put_dev(vub300->udev);
378 mmc_free_host(mmc);
379 /*
380 * and hence also frees vub300
381 * which is contained at the end of struct mmc
382 */
383 }
384
vub300_queue_cmnd_work(struct vub300_mmc_host * vub300)385 static void vub300_queue_cmnd_work(struct vub300_mmc_host *vub300)
386 {
387 kref_get(&vub300->kref);
388 if (queue_work(cmndworkqueue, &vub300->cmndwork)) {
389 /*
390 * then the cmndworkqueue was not previously
391 * running and the above get ref is obvious
392 * required and will be put when the thread
393 * terminates by a specific call
394 */
395 } else {
396 /*
397 * the cmndworkqueue was already running from
398 * a previous invocation and thus to keep the
399 * kref counts correct we must undo the get
400 */
401 kref_put(&vub300->kref, vub300_delete);
402 }
403 }
404
vub300_queue_poll_work(struct vub300_mmc_host * vub300,int delay)405 static void vub300_queue_poll_work(struct vub300_mmc_host *vub300, int delay)
406 {
407 kref_get(&vub300->kref);
408 if (queue_delayed_work(pollworkqueue, &vub300->pollwork, delay)) {
409 /*
410 * then the pollworkqueue was not previously
411 * running and the above get ref is obvious
412 * required and will be put when the thread
413 * terminates by a specific call
414 */
415 } else {
416 /*
417 * the pollworkqueue was already running from
418 * a previous invocation and thus to keep the
419 * kref counts correct we must undo the get
420 */
421 kref_put(&vub300->kref, vub300_delete);
422 }
423 }
424
vub300_queue_dead_work(struct vub300_mmc_host * vub300)425 static void vub300_queue_dead_work(struct vub300_mmc_host *vub300)
426 {
427 kref_get(&vub300->kref);
428 if (queue_work(deadworkqueue, &vub300->deadwork)) {
429 /*
430 * then the deadworkqueue was not previously
431 * running and the above get ref is obvious
432 * required and will be put when the thread
433 * terminates by a specific call
434 */
435 } else {
436 /*
437 * the deadworkqueue was already running from
438 * a previous invocation and thus to keep the
439 * kref counts correct we must undo the get
440 */
441 kref_put(&vub300->kref, vub300_delete);
442 }
443 }
444
irqpoll_res_completed(struct urb * urb)445 static void irqpoll_res_completed(struct urb *urb)
446 { /* urb completion handler - hardirq */
447 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
448 if (urb->status)
449 vub300->usb_transport_fail = urb->status;
450 complete(&vub300->irqpoll_complete);
451 }
452
irqpoll_out_completed(struct urb * urb)453 static void irqpoll_out_completed(struct urb *urb)
454 { /* urb completion handler - hardirq */
455 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
456 if (urb->status) {
457 vub300->usb_transport_fail = urb->status;
458 complete(&vub300->irqpoll_complete);
459 return;
460 } else {
461 int ret;
462 unsigned int pipe =
463 usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep);
464 usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe,
465 &vub300->resp, sizeof(vub300->resp),
466 irqpoll_res_completed, vub300);
467 vub300->command_res_urb->actual_length = 0;
468 ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC);
469 if (ret) {
470 vub300->usb_transport_fail = ret;
471 complete(&vub300->irqpoll_complete);
472 }
473 return;
474 }
475 }
476
send_irqpoll(struct vub300_mmc_host * vub300)477 static void send_irqpoll(struct vub300_mmc_host *vub300)
478 {
479 /* cmd_mutex is held by vub300_pollwork_thread */
480 int retval;
481 int timeout = 0xFFFF & (0x0001FFFF - firmware_irqpoll_timeout);
482 vub300->cmnd.poll.header_size = 22;
483 vub300->cmnd.poll.header_type = 1;
484 vub300->cmnd.poll.port_number = 0;
485 vub300->cmnd.poll.command_type = 2;
486 vub300->cmnd.poll.poll_timeout_lsb = 0xFF & (unsigned)timeout;
487 vub300->cmnd.poll.poll_timeout_msb = 0xFF & (unsigned)(timeout >> 8);
488 usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev,
489 usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep)
490 , &vub300->cmnd, sizeof(vub300->cmnd)
491 , irqpoll_out_completed, vub300);
492 retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL);
493 if (0 > retval) {
494 vub300->usb_transport_fail = retval;
495 vub300_queue_poll_work(vub300, 1);
496 complete(&vub300->irqpoll_complete);
497 return;
498 } else {
499 return;
500 }
501 }
502
new_system_port_status(struct vub300_mmc_host * vub300)503 static void new_system_port_status(struct vub300_mmc_host *vub300)
504 {
505 int old_card_present = vub300->card_present;
506 int new_card_present =
507 (0x0001 & vub300->system_port_status.port_flags) ? 1 : 0;
508 vub300->read_only =
509 (0x0010 & vub300->system_port_status.port_flags) ? 1 : 0;
510 if (new_card_present && !old_card_present) {
511 dev_info(&vub300->udev->dev, "card just inserted\n");
512 vub300->card_present = 1;
513 vub300->bus_width = 0;
514 if (disable_offload_processing)
515 strncpy(vub300->vub_name, "EMPTY Processing Disabled",
516 sizeof(vub300->vub_name));
517 else
518 vub300->vub_name[0] = 0;
519 mmc_detect_change(vub300->mmc, 1);
520 } else if (!new_card_present && old_card_present) {
521 dev_info(&vub300->udev->dev, "card just ejected\n");
522 vub300->card_present = 0;
523 mmc_detect_change(vub300->mmc, 0);
524 } else {
525 /* no change */
526 }
527 }
528
__add_offloaded_reg_to_fifo(struct vub300_mmc_host * vub300,struct offload_registers_access * register_access,u8 func)529 static void __add_offloaded_reg_to_fifo(struct vub300_mmc_host *vub300,
530 struct offload_registers_access
531 *register_access, u8 func)
532 {
533 u8 r = vub300->fn[func].offload_point + vub300->fn[func].offload_count;
534 memcpy(&vub300->fn[func].reg[MAXREGMASK & r], register_access,
535 sizeof(struct offload_registers_access));
536 vub300->fn[func].offload_count += 1;
537 vub300->total_offload_count += 1;
538 }
539
add_offloaded_reg(struct vub300_mmc_host * vub300,struct offload_registers_access * register_access)540 static void add_offloaded_reg(struct vub300_mmc_host *vub300,
541 struct offload_registers_access *register_access)
542 {
543 u32 Register = ((0x03 & register_access->command_byte[0]) << 15)
544 | ((0xFF & register_access->command_byte[1]) << 7)
545 | ((0xFE & register_access->command_byte[2]) >> 1);
546 u8 func = ((0x70 & register_access->command_byte[0]) >> 4);
547 u8 regs = vub300->dynamic_register_count;
548 u8 i = 0;
549 while (0 < regs-- && 1 == vub300->sdio_register[i].activate) {
550 if (vub300->sdio_register[i].func_num == func &&
551 vub300->sdio_register[i].sdio_reg == Register) {
552 if (vub300->sdio_register[i].prepared == 0)
553 vub300->sdio_register[i].prepared = 1;
554 vub300->sdio_register[i].response =
555 register_access->Respond_Byte[2];
556 vub300->sdio_register[i].regvalue =
557 register_access->Respond_Byte[3];
558 return;
559 } else {
560 i += 1;
561 continue;
562 }
563 }
564 __add_offloaded_reg_to_fifo(vub300, register_access, func);
565 }
566
check_vub300_port_status(struct vub300_mmc_host * vub300)567 static void check_vub300_port_status(struct vub300_mmc_host *vub300)
568 {
569 /*
570 * cmd_mutex is held by vub300_pollwork_thread,
571 * vub300_deadwork_thread or vub300_cmndwork_thread
572 */
573 int retval;
574 retval =
575 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
576 GET_SYSTEM_PORT_STATUS,
577 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
578 0x0000, 0x0000, &vub300->system_port_status,
579 sizeof(vub300->system_port_status), HZ);
580 if (sizeof(vub300->system_port_status) == retval)
581 new_system_port_status(vub300);
582 }
583
__vub300_irqpoll_response(struct vub300_mmc_host * vub300)584 static void __vub300_irqpoll_response(struct vub300_mmc_host *vub300)
585 {
586 /* cmd_mutex is held by vub300_pollwork_thread */
587 if (vub300->command_res_urb->actual_length == 0)
588 return;
589
590 switch (vub300->resp.common.header_type) {
591 case RESPONSE_INTERRUPT:
592 mutex_lock(&vub300->irq_mutex);
593 if (vub300->irq_enabled)
594 mmc_signal_sdio_irq(vub300->mmc);
595 else
596 vub300->irqs_queued += 1;
597 vub300->irq_disabled = 1;
598 mutex_unlock(&vub300->irq_mutex);
599 break;
600 case RESPONSE_ERROR:
601 if (vub300->resp.error.error_code == SD_ERROR_NO_DEVICE)
602 check_vub300_port_status(vub300);
603 break;
604 case RESPONSE_STATUS:
605 vub300->system_port_status = vub300->resp.status;
606 new_system_port_status(vub300);
607 if (!vub300->card_present)
608 vub300_queue_poll_work(vub300, HZ / 5);
609 break;
610 case RESPONSE_IRQ_DISABLED:
611 {
612 int offloaded_data_length = vub300->resp.common.header_size - 3;
613 int register_count = offloaded_data_length >> 3;
614 int ri = 0;
615 while (register_count--) {
616 add_offloaded_reg(vub300, &vub300->resp.irq.reg[ri]);
617 ri += 1;
618 }
619 mutex_lock(&vub300->irq_mutex);
620 if (vub300->irq_enabled)
621 mmc_signal_sdio_irq(vub300->mmc);
622 else
623 vub300->irqs_queued += 1;
624 vub300->irq_disabled = 1;
625 mutex_unlock(&vub300->irq_mutex);
626 break;
627 }
628 case RESPONSE_IRQ_ENABLED:
629 {
630 int offloaded_data_length = vub300->resp.common.header_size - 3;
631 int register_count = offloaded_data_length >> 3;
632 int ri = 0;
633 while (register_count--) {
634 add_offloaded_reg(vub300, &vub300->resp.irq.reg[ri]);
635 ri += 1;
636 }
637 mutex_lock(&vub300->irq_mutex);
638 if (vub300->irq_enabled)
639 mmc_signal_sdio_irq(vub300->mmc);
640 else
641 vub300->irqs_queued += 1;
642 vub300->irq_disabled = 0;
643 mutex_unlock(&vub300->irq_mutex);
644 break;
645 }
646 case RESPONSE_NO_INTERRUPT:
647 vub300_queue_poll_work(vub300, 1);
648 break;
649 default:
650 break;
651 }
652 }
653
__do_poll(struct vub300_mmc_host * vub300)654 static void __do_poll(struct vub300_mmc_host *vub300)
655 {
656 /* cmd_mutex is held by vub300_pollwork_thread */
657 unsigned long commretval;
658 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
659 init_completion(&vub300->irqpoll_complete);
660 send_irqpoll(vub300);
661 commretval = wait_for_completion_timeout(&vub300->irqpoll_complete,
662 msecs_to_jiffies(500));
663 if (vub300->usb_transport_fail) {
664 /* no need to do anything */
665 } else if (commretval == 0) {
666 vub300->usb_timed_out = 1;
667 usb_kill_urb(vub300->command_out_urb);
668 usb_kill_urb(vub300->command_res_urb);
669 } else { /* commretval > 0 */
670 __vub300_irqpoll_response(vub300);
671 }
672 }
673
674 /* this thread runs only when the driver
675 * is trying to poll the device for an IRQ
676 */
vub300_pollwork_thread(struct work_struct * work)677 static void vub300_pollwork_thread(struct work_struct *work)
678 { /* NOT irq */
679 struct vub300_mmc_host *vub300 = container_of(work,
680 struct vub300_mmc_host, pollwork.work);
681 if (!vub300->interface) {
682 kref_put(&vub300->kref, vub300_delete);
683 return;
684 }
685 mutex_lock(&vub300->cmd_mutex);
686 if (vub300->cmd) {
687 vub300_queue_poll_work(vub300, 1);
688 } else if (!vub300->card_present) {
689 /* no need to do anything */
690 } else { /* vub300->card_present */
691 mutex_lock(&vub300->irq_mutex);
692 if (!vub300->irq_enabled) {
693 mutex_unlock(&vub300->irq_mutex);
694 } else if (vub300->irqs_queued) {
695 vub300->irqs_queued -= 1;
696 mmc_signal_sdio_irq(vub300->mmc);
697 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
698 mutex_unlock(&vub300->irq_mutex);
699 } else { /* NOT vub300->irqs_queued */
700 mutex_unlock(&vub300->irq_mutex);
701 __do_poll(vub300);
702 }
703 }
704 mutex_unlock(&vub300->cmd_mutex);
705 kref_put(&vub300->kref, vub300_delete);
706 }
707
vub300_deadwork_thread(struct work_struct * work)708 static void vub300_deadwork_thread(struct work_struct *work)
709 { /* NOT irq */
710 struct vub300_mmc_host *vub300 =
711 container_of(work, struct vub300_mmc_host, deadwork);
712 if (!vub300->interface) {
713 kref_put(&vub300->kref, vub300_delete);
714 return;
715 }
716 mutex_lock(&vub300->cmd_mutex);
717 if (vub300->cmd) {
718 /*
719 * a command got in as the inactivity
720 * timer expired - so we just let the
721 * processing of the command show if
722 * the device is dead
723 */
724 } else if (vub300->card_present) {
725 check_vub300_port_status(vub300);
726 } else if (vub300->mmc && vub300->mmc->card) {
727 /*
728 * the MMC core must not have responded
729 * to the previous indication - lets
730 * hope that it eventually does so we
731 * will just ignore this for now
732 */
733 } else {
734 check_vub300_port_status(vub300);
735 }
736 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
737 mutex_unlock(&vub300->cmd_mutex);
738 kref_put(&vub300->kref, vub300_delete);
739 }
740
vub300_inactivity_timer_expired(struct timer_list * t)741 static void vub300_inactivity_timer_expired(struct timer_list *t)
742 { /* softirq */
743 struct vub300_mmc_host *vub300 = from_timer(vub300, t,
744 inactivity_timer);
745 if (!vub300->interface) {
746 kref_put(&vub300->kref, vub300_delete);
747 } else if (vub300->cmd) {
748 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
749 } else {
750 vub300_queue_dead_work(vub300);
751 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
752 }
753 }
754
vub300_response_error(u8 error_code)755 static int vub300_response_error(u8 error_code)
756 {
757 switch (error_code) {
758 case SD_ERROR_PIO_TIMEOUT:
759 case SD_ERROR_1BIT_TIMEOUT:
760 case SD_ERROR_4BIT_TIMEOUT:
761 return -ETIMEDOUT;
762 case SD_ERROR_STAT_DATA:
763 case SD_ERROR_OVERRUN:
764 case SD_ERROR_STAT_CMD:
765 case SD_ERROR_STAT_CMD_TIMEOUT:
766 case SD_ERROR_SDCRDY_STUCK:
767 case SD_ERROR_UNHANDLED:
768 case SD_ERROR_1BIT_CRC_WRONG:
769 case SD_ERROR_4BIT_CRC_WRONG:
770 case SD_ERROR_1BIT_CRC_ERROR:
771 case SD_ERROR_4BIT_CRC_ERROR:
772 case SD_ERROR_NO_CMD_ENDBIT:
773 case SD_ERROR_NO_1BIT_DATEND:
774 case SD_ERROR_NO_4BIT_DATEND:
775 case SD_ERROR_1BIT_DATA_TIMEOUT:
776 case SD_ERROR_4BIT_DATA_TIMEOUT:
777 case SD_ERROR_1BIT_UNEXPECTED_TIMEOUT:
778 case SD_ERROR_4BIT_UNEXPECTED_TIMEOUT:
779 return -EILSEQ;
780 case 33:
781 return -EILSEQ;
782 case SD_ERROR_ILLEGAL_COMMAND:
783 return -EINVAL;
784 case SD_ERROR_NO_DEVICE:
785 return -ENOMEDIUM;
786 default:
787 return -ENODEV;
788 }
789 }
790
command_res_completed(struct urb * urb)791 static void command_res_completed(struct urb *urb)
792 { /* urb completion handler - hardirq */
793 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
794 if (urb->status) {
795 /* we have to let the initiator handle the error */
796 } else if (vub300->command_res_urb->actual_length == 0) {
797 /*
798 * we have seen this happen once or twice and
799 * we suspect a buggy USB host controller
800 */
801 } else if (!vub300->data) {
802 /* this means that the command (typically CMD52) succeeded */
803 } else if (vub300->resp.common.header_type != 0x02) {
804 /*
805 * this is an error response from the VUB300 chip
806 * and we let the initiator handle it
807 */
808 } else if (vub300->urb) {
809 vub300->cmd->error =
810 vub300_response_error(vub300->resp.error.error_code);
811 usb_unlink_urb(vub300->urb);
812 } else {
813 vub300->cmd->error =
814 vub300_response_error(vub300->resp.error.error_code);
815 usb_sg_cancel(&vub300->sg_request);
816 }
817 complete(&vub300->command_complete); /* got_response_in */
818 }
819
command_out_completed(struct urb * urb)820 static void command_out_completed(struct urb *urb)
821 { /* urb completion handler - hardirq */
822 struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
823 if (urb->status) {
824 complete(&vub300->command_complete);
825 } else {
826 int ret;
827 unsigned int pipe =
828 usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep);
829 usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe,
830 &vub300->resp, sizeof(vub300->resp),
831 command_res_completed, vub300);
832 vub300->command_res_urb->actual_length = 0;
833 ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC);
834 if (ret == 0) {
835 /*
836 * the urb completion handler will call
837 * our completion handler
838 */
839 } else {
840 /*
841 * and thus we only call it directly
842 * when it will not be called
843 */
844 complete(&vub300->command_complete);
845 }
846 }
847 }
848
849 /*
850 * the STUFF bits are masked out for the comparisons
851 */
snoop_block_size_and_bus_width(struct vub300_mmc_host * vub300,u32 cmd_arg)852 static void snoop_block_size_and_bus_width(struct vub300_mmc_host *vub300,
853 u32 cmd_arg)
854 {
855 if ((0xFBFFFE00 & cmd_arg) == 0x80022200)
856 vub300->fbs[1] = (cmd_arg << 8) | (0x00FF & vub300->fbs[1]);
857 else if ((0xFBFFFE00 & cmd_arg) == 0x80022000)
858 vub300->fbs[1] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[1]);
859 else if ((0xFBFFFE00 & cmd_arg) == 0x80042200)
860 vub300->fbs[2] = (cmd_arg << 8) | (0x00FF & vub300->fbs[2]);
861 else if ((0xFBFFFE00 & cmd_arg) == 0x80042000)
862 vub300->fbs[2] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[2]);
863 else if ((0xFBFFFE00 & cmd_arg) == 0x80062200)
864 vub300->fbs[3] = (cmd_arg << 8) | (0x00FF & vub300->fbs[3]);
865 else if ((0xFBFFFE00 & cmd_arg) == 0x80062000)
866 vub300->fbs[3] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[3]);
867 else if ((0xFBFFFE00 & cmd_arg) == 0x80082200)
868 vub300->fbs[4] = (cmd_arg << 8) | (0x00FF & vub300->fbs[4]);
869 else if ((0xFBFFFE00 & cmd_arg) == 0x80082000)
870 vub300->fbs[4] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[4]);
871 else if ((0xFBFFFE00 & cmd_arg) == 0x800A2200)
872 vub300->fbs[5] = (cmd_arg << 8) | (0x00FF & vub300->fbs[5]);
873 else if ((0xFBFFFE00 & cmd_arg) == 0x800A2000)
874 vub300->fbs[5] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[5]);
875 else if ((0xFBFFFE00 & cmd_arg) == 0x800C2200)
876 vub300->fbs[6] = (cmd_arg << 8) | (0x00FF & vub300->fbs[6]);
877 else if ((0xFBFFFE00 & cmd_arg) == 0x800C2000)
878 vub300->fbs[6] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[6]);
879 else if ((0xFBFFFE00 & cmd_arg) == 0x800E2200)
880 vub300->fbs[7] = (cmd_arg << 8) | (0x00FF & vub300->fbs[7]);
881 else if ((0xFBFFFE00 & cmd_arg) == 0x800E2000)
882 vub300->fbs[7] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[7]);
883 else if ((0xFBFFFE03 & cmd_arg) == 0x80000E00)
884 vub300->bus_width = 1;
885 else if ((0xFBFFFE03 & cmd_arg) == 0x80000E02)
886 vub300->bus_width = 4;
887 }
888
send_command(struct vub300_mmc_host * vub300)889 static void send_command(struct vub300_mmc_host *vub300)
890 {
891 /* cmd_mutex is held by vub300_cmndwork_thread */
892 struct mmc_command *cmd = vub300->cmd;
893 struct mmc_data *data = vub300->data;
894 int retval;
895 int i;
896 u8 response_type;
897 if (vub300->app_spec) {
898 switch (cmd->opcode) {
899 case 6:
900 response_type = SDRT_1;
901 vub300->resp_len = 6;
902 if (0x00000000 == (0x00000003 & cmd->arg))
903 vub300->bus_width = 1;
904 else if (0x00000002 == (0x00000003 & cmd->arg))
905 vub300->bus_width = 4;
906 else
907 dev_err(&vub300->udev->dev,
908 "unexpected ACMD6 bus_width=%d\n",
909 0x00000003 & cmd->arg);
910 break;
911 case 13:
912 response_type = SDRT_1;
913 vub300->resp_len = 6;
914 break;
915 case 22:
916 response_type = SDRT_1;
917 vub300->resp_len = 6;
918 break;
919 case 23:
920 response_type = SDRT_1;
921 vub300->resp_len = 6;
922 break;
923 case 41:
924 response_type = SDRT_3;
925 vub300->resp_len = 6;
926 break;
927 case 42:
928 response_type = SDRT_1;
929 vub300->resp_len = 6;
930 break;
931 case 51:
932 response_type = SDRT_1;
933 vub300->resp_len = 6;
934 break;
935 case 55:
936 response_type = SDRT_1;
937 vub300->resp_len = 6;
938 break;
939 default:
940 vub300->resp_len = 0;
941 cmd->error = -EINVAL;
942 complete(&vub300->command_complete);
943 return;
944 }
945 vub300->app_spec = 0;
946 } else {
947 switch (cmd->opcode) {
948 case 0:
949 response_type = SDRT_NONE;
950 vub300->resp_len = 0;
951 break;
952 case 1:
953 response_type = SDRT_3;
954 vub300->resp_len = 6;
955 break;
956 case 2:
957 response_type = SDRT_2;
958 vub300->resp_len = 17;
959 break;
960 case 3:
961 response_type = SDRT_6;
962 vub300->resp_len = 6;
963 break;
964 case 4:
965 response_type = SDRT_NONE;
966 vub300->resp_len = 0;
967 break;
968 case 5:
969 response_type = SDRT_4;
970 vub300->resp_len = 6;
971 break;
972 case 6:
973 response_type = SDRT_1;
974 vub300->resp_len = 6;
975 break;
976 case 7:
977 response_type = SDRT_1B;
978 vub300->resp_len = 6;
979 break;
980 case 8:
981 response_type = SDRT_7;
982 vub300->resp_len = 6;
983 break;
984 case 9:
985 response_type = SDRT_2;
986 vub300->resp_len = 17;
987 break;
988 case 10:
989 response_type = SDRT_2;
990 vub300->resp_len = 17;
991 break;
992 case 12:
993 response_type = SDRT_1B;
994 vub300->resp_len = 6;
995 break;
996 case 13:
997 response_type = SDRT_1;
998 vub300->resp_len = 6;
999 break;
1000 case 15:
1001 response_type = SDRT_NONE;
1002 vub300->resp_len = 0;
1003 break;
1004 case 16:
1005 for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++)
1006 vub300->fbs[i] = 0xFFFF & cmd->arg;
1007 response_type = SDRT_1;
1008 vub300->resp_len = 6;
1009 break;
1010 case 17:
1011 case 18:
1012 case 24:
1013 case 25:
1014 case 27:
1015 response_type = SDRT_1;
1016 vub300->resp_len = 6;
1017 break;
1018 case 28:
1019 case 29:
1020 response_type = SDRT_1B;
1021 vub300->resp_len = 6;
1022 break;
1023 case 30:
1024 case 32:
1025 case 33:
1026 response_type = SDRT_1;
1027 vub300->resp_len = 6;
1028 break;
1029 case 38:
1030 response_type = SDRT_1B;
1031 vub300->resp_len = 6;
1032 break;
1033 case 42:
1034 response_type = SDRT_1;
1035 vub300->resp_len = 6;
1036 break;
1037 case 52:
1038 response_type = SDRT_5;
1039 vub300->resp_len = 6;
1040 snoop_block_size_and_bus_width(vub300, cmd->arg);
1041 break;
1042 case 53:
1043 response_type = SDRT_5;
1044 vub300->resp_len = 6;
1045 break;
1046 case 55:
1047 response_type = SDRT_1;
1048 vub300->resp_len = 6;
1049 vub300->app_spec = 1;
1050 break;
1051 case 56:
1052 response_type = SDRT_1;
1053 vub300->resp_len = 6;
1054 break;
1055 default:
1056 vub300->resp_len = 0;
1057 cmd->error = -EINVAL;
1058 complete(&vub300->command_complete);
1059 return;
1060 }
1061 }
1062 /*
1063 * it is a shame that we can not use "sizeof(struct sd_command_header)"
1064 * this is because the packet _must_ be padded to 64 bytes
1065 */
1066 vub300->cmnd.head.header_size = 20;
1067 vub300->cmnd.head.header_type = 0x00;
1068 vub300->cmnd.head.port_number = 0; /* "0" means port 1 */
1069 vub300->cmnd.head.command_type = 0x00; /* standard read command */
1070 vub300->cmnd.head.response_type = response_type;
1071 vub300->cmnd.head.command_index = cmd->opcode;
1072 vub300->cmnd.head.arguments[0] = cmd->arg >> 24;
1073 vub300->cmnd.head.arguments[1] = cmd->arg >> 16;
1074 vub300->cmnd.head.arguments[2] = cmd->arg >> 8;
1075 vub300->cmnd.head.arguments[3] = cmd->arg >> 0;
1076 if (cmd->opcode == 52) {
1077 int fn = 0x7 & (cmd->arg >> 28);
1078 vub300->cmnd.head.block_count[0] = 0;
1079 vub300->cmnd.head.block_count[1] = 0;
1080 vub300->cmnd.head.block_size[0] = (vub300->fbs[fn] >> 8) & 0xFF;
1081 vub300->cmnd.head.block_size[1] = (vub300->fbs[fn] >> 0) & 0xFF;
1082 vub300->cmnd.head.command_type = 0x00;
1083 vub300->cmnd.head.transfer_size[0] = 0;
1084 vub300->cmnd.head.transfer_size[1] = 0;
1085 vub300->cmnd.head.transfer_size[2] = 0;
1086 vub300->cmnd.head.transfer_size[3] = 0;
1087 } else if (!data) {
1088 vub300->cmnd.head.block_count[0] = 0;
1089 vub300->cmnd.head.block_count[1] = 0;
1090 vub300->cmnd.head.block_size[0] = (vub300->fbs[0] >> 8) & 0xFF;
1091 vub300->cmnd.head.block_size[1] = (vub300->fbs[0] >> 0) & 0xFF;
1092 vub300->cmnd.head.command_type = 0x00;
1093 vub300->cmnd.head.transfer_size[0] = 0;
1094 vub300->cmnd.head.transfer_size[1] = 0;
1095 vub300->cmnd.head.transfer_size[2] = 0;
1096 vub300->cmnd.head.transfer_size[3] = 0;
1097 } else if (cmd->opcode == 53) {
1098 int fn = 0x7 & (cmd->arg >> 28);
1099 if (0x08 & vub300->cmnd.head.arguments[0]) { /* BLOCK MODE */
1100 vub300->cmnd.head.block_count[0] =
1101 (data->blocks >> 8) & 0xFF;
1102 vub300->cmnd.head.block_count[1] =
1103 (data->blocks >> 0) & 0xFF;
1104 vub300->cmnd.head.block_size[0] =
1105 (data->blksz >> 8) & 0xFF;
1106 vub300->cmnd.head.block_size[1] =
1107 (data->blksz >> 0) & 0xFF;
1108 } else { /* BYTE MODE */
1109 vub300->cmnd.head.block_count[0] = 0;
1110 vub300->cmnd.head.block_count[1] = 0;
1111 vub300->cmnd.head.block_size[0] =
1112 (vub300->datasize >> 8) & 0xFF;
1113 vub300->cmnd.head.block_size[1] =
1114 (vub300->datasize >> 0) & 0xFF;
1115 }
1116 vub300->cmnd.head.command_type =
1117 (MMC_DATA_READ & data->flags) ? 0x00 : 0x80;
1118 vub300->cmnd.head.transfer_size[0] =
1119 (vub300->datasize >> 24) & 0xFF;
1120 vub300->cmnd.head.transfer_size[1] =
1121 (vub300->datasize >> 16) & 0xFF;
1122 vub300->cmnd.head.transfer_size[2] =
1123 (vub300->datasize >> 8) & 0xFF;
1124 vub300->cmnd.head.transfer_size[3] =
1125 (vub300->datasize >> 0) & 0xFF;
1126 if (vub300->datasize < vub300->fbs[fn]) {
1127 vub300->cmnd.head.block_count[0] = 0;
1128 vub300->cmnd.head.block_count[1] = 0;
1129 }
1130 } else {
1131 vub300->cmnd.head.block_count[0] = (data->blocks >> 8) & 0xFF;
1132 vub300->cmnd.head.block_count[1] = (data->blocks >> 0) & 0xFF;
1133 vub300->cmnd.head.block_size[0] = (data->blksz >> 8) & 0xFF;
1134 vub300->cmnd.head.block_size[1] = (data->blksz >> 0) & 0xFF;
1135 vub300->cmnd.head.command_type =
1136 (MMC_DATA_READ & data->flags) ? 0x00 : 0x80;
1137 vub300->cmnd.head.transfer_size[0] =
1138 (vub300->datasize >> 24) & 0xFF;
1139 vub300->cmnd.head.transfer_size[1] =
1140 (vub300->datasize >> 16) & 0xFF;
1141 vub300->cmnd.head.transfer_size[2] =
1142 (vub300->datasize >> 8) & 0xFF;
1143 vub300->cmnd.head.transfer_size[3] =
1144 (vub300->datasize >> 0) & 0xFF;
1145 if (vub300->datasize < vub300->fbs[0]) {
1146 vub300->cmnd.head.block_count[0] = 0;
1147 vub300->cmnd.head.block_count[1] = 0;
1148 }
1149 }
1150 if (vub300->cmnd.head.block_size[0] || vub300->cmnd.head.block_size[1]) {
1151 u16 block_size = vub300->cmnd.head.block_size[1] |
1152 (vub300->cmnd.head.block_size[0] << 8);
1153 u16 block_boundary = FIRMWARE_BLOCK_BOUNDARY -
1154 (FIRMWARE_BLOCK_BOUNDARY % block_size);
1155 vub300->cmnd.head.block_boundary[0] =
1156 (block_boundary >> 8) & 0xFF;
1157 vub300->cmnd.head.block_boundary[1] =
1158 (block_boundary >> 0) & 0xFF;
1159 } else {
1160 vub300->cmnd.head.block_boundary[0] = 0;
1161 vub300->cmnd.head.block_boundary[1] = 0;
1162 }
1163 usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev,
1164 usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep),
1165 &vub300->cmnd, sizeof(vub300->cmnd),
1166 command_out_completed, vub300);
1167 retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL);
1168 if (retval < 0) {
1169 cmd->error = retval;
1170 complete(&vub300->command_complete);
1171 return;
1172 } else {
1173 return;
1174 }
1175 }
1176
1177 /*
1178 * timer callback runs in atomic mode
1179 * so it cannot call usb_kill_urb()
1180 */
vub300_sg_timed_out(struct timer_list * t)1181 static void vub300_sg_timed_out(struct timer_list *t)
1182 {
1183 struct vub300_mmc_host *vub300 = from_timer(vub300, t,
1184 sg_transfer_timer);
1185 vub300->usb_timed_out = 1;
1186 usb_sg_cancel(&vub300->sg_request);
1187 usb_unlink_urb(vub300->command_out_urb);
1188 usb_unlink_urb(vub300->command_res_urb);
1189 }
1190
roundup_to_multiple_of_64(u16 number)1191 static u16 roundup_to_multiple_of_64(u16 number)
1192 {
1193 return 0xFFC0 & (0x3F + number);
1194 }
1195
1196 /*
1197 * this is a separate function to solve the 80 column width restriction
1198 */
__download_offload_pseudocode(struct vub300_mmc_host * vub300,const struct firmware * fw)1199 static void __download_offload_pseudocode(struct vub300_mmc_host *vub300,
1200 const struct firmware *fw)
1201 {
1202 u8 register_count = 0;
1203 u16 ts = 0;
1204 u16 interrupt_size = 0;
1205 const u8 *data = fw->data;
1206 int size = fw->size;
1207 u8 c;
1208 dev_info(&vub300->udev->dev, "using %s for SDIO offload processing\n",
1209 vub300->vub_name);
1210 do {
1211 c = *data++;
1212 } while (size-- && c); /* skip comment */
1213 dev_info(&vub300->udev->dev, "using offload firmware %s %s\n", fw->data,
1214 vub300->vub_name);
1215 if (size < 4) {
1216 dev_err(&vub300->udev->dev,
1217 "corrupt offload pseudocode in firmware %s\n",
1218 vub300->vub_name);
1219 strncpy(vub300->vub_name, "corrupt offload pseudocode",
1220 sizeof(vub300->vub_name));
1221 return;
1222 }
1223 interrupt_size += *data++;
1224 size -= 1;
1225 interrupt_size <<= 8;
1226 interrupt_size += *data++;
1227 size -= 1;
1228 if (interrupt_size < size) {
1229 u16 xfer_length = roundup_to_multiple_of_64(interrupt_size);
1230 u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL);
1231 if (xfer_buffer) {
1232 int retval;
1233 memcpy(xfer_buffer, data, interrupt_size);
1234 memset(xfer_buffer + interrupt_size, 0,
1235 xfer_length - interrupt_size);
1236 size -= interrupt_size;
1237 data += interrupt_size;
1238 retval =
1239 usb_control_msg(vub300->udev,
1240 usb_sndctrlpipe(vub300->udev, 0),
1241 SET_INTERRUPT_PSEUDOCODE,
1242 USB_DIR_OUT | USB_TYPE_VENDOR |
1243 USB_RECIP_DEVICE, 0x0000, 0x0000,
1244 xfer_buffer, xfer_length, HZ);
1245 kfree(xfer_buffer);
1246 if (retval < 0)
1247 goto copy_error_message;
1248 } else {
1249 dev_err(&vub300->udev->dev,
1250 "not enough memory for xfer buffer to send"
1251 " INTERRUPT_PSEUDOCODE for %s %s\n", fw->data,
1252 vub300->vub_name);
1253 strncpy(vub300->vub_name,
1254 "SDIO interrupt pseudocode download failed",
1255 sizeof(vub300->vub_name));
1256 return;
1257 }
1258 } else {
1259 dev_err(&vub300->udev->dev,
1260 "corrupt interrupt pseudocode in firmware %s %s\n",
1261 fw->data, vub300->vub_name);
1262 strncpy(vub300->vub_name, "corrupt interrupt pseudocode",
1263 sizeof(vub300->vub_name));
1264 return;
1265 }
1266 ts += *data++;
1267 size -= 1;
1268 ts <<= 8;
1269 ts += *data++;
1270 size -= 1;
1271 if (ts < size) {
1272 u16 xfer_length = roundup_to_multiple_of_64(ts);
1273 u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL);
1274 if (xfer_buffer) {
1275 int retval;
1276 memcpy(xfer_buffer, data, ts);
1277 memset(xfer_buffer + ts, 0,
1278 xfer_length - ts);
1279 size -= ts;
1280 data += ts;
1281 retval =
1282 usb_control_msg(vub300->udev,
1283 usb_sndctrlpipe(vub300->udev, 0),
1284 SET_TRANSFER_PSEUDOCODE,
1285 USB_DIR_OUT | USB_TYPE_VENDOR |
1286 USB_RECIP_DEVICE, 0x0000, 0x0000,
1287 xfer_buffer, xfer_length, HZ);
1288 kfree(xfer_buffer);
1289 if (retval < 0)
1290 goto copy_error_message;
1291 } else {
1292 dev_err(&vub300->udev->dev,
1293 "not enough memory for xfer buffer to send"
1294 " TRANSFER_PSEUDOCODE for %s %s\n", fw->data,
1295 vub300->vub_name);
1296 strncpy(vub300->vub_name,
1297 "SDIO transfer pseudocode download failed",
1298 sizeof(vub300->vub_name));
1299 return;
1300 }
1301 } else {
1302 dev_err(&vub300->udev->dev,
1303 "corrupt transfer pseudocode in firmware %s %s\n",
1304 fw->data, vub300->vub_name);
1305 strncpy(vub300->vub_name, "corrupt transfer pseudocode",
1306 sizeof(vub300->vub_name));
1307 return;
1308 }
1309 register_count += *data++;
1310 size -= 1;
1311 if (register_count * 4 == size) {
1312 int I = vub300->dynamic_register_count = register_count;
1313 int i = 0;
1314 while (I--) {
1315 unsigned int func_num = 0;
1316 vub300->sdio_register[i].func_num = *data++;
1317 size -= 1;
1318 func_num += *data++;
1319 size -= 1;
1320 func_num <<= 8;
1321 func_num += *data++;
1322 size -= 1;
1323 func_num <<= 8;
1324 func_num += *data++;
1325 size -= 1;
1326 vub300->sdio_register[i].sdio_reg = func_num;
1327 vub300->sdio_register[i].activate = 1;
1328 vub300->sdio_register[i].prepared = 0;
1329 i += 1;
1330 }
1331 dev_info(&vub300->udev->dev,
1332 "initialized %d dynamic pseudocode registers\n",
1333 vub300->dynamic_register_count);
1334 return;
1335 } else {
1336 dev_err(&vub300->udev->dev,
1337 "corrupt dynamic registers in firmware %s\n",
1338 vub300->vub_name);
1339 strncpy(vub300->vub_name, "corrupt dynamic registers",
1340 sizeof(vub300->vub_name));
1341 return;
1342 }
1343
1344 return;
1345
1346 copy_error_message:
1347 strncpy(vub300->vub_name, "SDIO pseudocode download failed",
1348 sizeof(vub300->vub_name));
1349 }
1350
1351 /*
1352 * if the binary containing the EMPTY PseudoCode can not be found
1353 * vub300->vub_name is set anyway in order to prevent an automatic retry
1354 */
download_offload_pseudocode(struct vub300_mmc_host * vub300)1355 static void download_offload_pseudocode(struct vub300_mmc_host *vub300)
1356 {
1357 struct mmc_card *card = vub300->mmc->card;
1358 int sdio_funcs = card->sdio_funcs;
1359 const struct firmware *fw = NULL;
1360 int l = snprintf(vub300->vub_name, sizeof(vub300->vub_name),
1361 "vub_%04X%04X", card->cis.vendor, card->cis.device);
1362 int n = 0;
1363 int retval;
1364 for (n = 0; n < sdio_funcs; n++) {
1365 struct sdio_func *sf = card->sdio_func[n];
1366 l += scnprintf(vub300->vub_name + l,
1367 sizeof(vub300->vub_name) - l, "_%04X%04X",
1368 sf->vendor, sf->device);
1369 }
1370 snprintf(vub300->vub_name + l, sizeof(vub300->vub_name) - l, ".bin");
1371 dev_info(&vub300->udev->dev, "requesting offload firmware %s\n",
1372 vub300->vub_name);
1373 retval = request_firmware(&fw, vub300->vub_name, &card->dev);
1374 if (retval < 0) {
1375 strncpy(vub300->vub_name, "vub_default.bin",
1376 sizeof(vub300->vub_name));
1377 retval = request_firmware(&fw, vub300->vub_name, &card->dev);
1378 if (retval < 0) {
1379 strncpy(vub300->vub_name,
1380 "no SDIO offload firmware found",
1381 sizeof(vub300->vub_name));
1382 } else {
1383 __download_offload_pseudocode(vub300, fw);
1384 release_firmware(fw);
1385 }
1386 } else {
1387 __download_offload_pseudocode(vub300, fw);
1388 release_firmware(fw);
1389 }
1390 }
1391
vub300_usb_bulk_msg_completion(struct urb * urb)1392 static void vub300_usb_bulk_msg_completion(struct urb *urb)
1393 { /* urb completion handler - hardirq */
1394 complete((struct completion *)urb->context);
1395 }
1396
vub300_usb_bulk_msg(struct vub300_mmc_host * vub300,unsigned int pipe,void * data,int len,int * actual_length,int timeout_msecs)1397 static int vub300_usb_bulk_msg(struct vub300_mmc_host *vub300,
1398 unsigned int pipe, void *data, int len,
1399 int *actual_length, int timeout_msecs)
1400 {
1401 /* cmd_mutex is held by vub300_cmndwork_thread */
1402 struct usb_device *usb_dev = vub300->udev;
1403 struct completion done;
1404 int retval;
1405 vub300->urb = usb_alloc_urb(0, GFP_KERNEL);
1406 if (!vub300->urb)
1407 return -ENOMEM;
1408 usb_fill_bulk_urb(vub300->urb, usb_dev, pipe, data, len,
1409 vub300_usb_bulk_msg_completion, NULL);
1410 init_completion(&done);
1411 vub300->urb->context = &done;
1412 vub300->urb->actual_length = 0;
1413 retval = usb_submit_urb(vub300->urb, GFP_KERNEL);
1414 if (unlikely(retval))
1415 goto out;
1416 if (!wait_for_completion_timeout
1417 (&done, msecs_to_jiffies(timeout_msecs))) {
1418 retval = -ETIMEDOUT;
1419 usb_kill_urb(vub300->urb);
1420 } else {
1421 retval = vub300->urb->status;
1422 }
1423 out:
1424 *actual_length = vub300->urb->actual_length;
1425 usb_free_urb(vub300->urb);
1426 vub300->urb = NULL;
1427 return retval;
1428 }
1429
__command_read_data(struct vub300_mmc_host * vub300,struct mmc_command * cmd,struct mmc_data * data)1430 static int __command_read_data(struct vub300_mmc_host *vub300,
1431 struct mmc_command *cmd, struct mmc_data *data)
1432 {
1433 /* cmd_mutex is held by vub300_cmndwork_thread */
1434 int linear_length = vub300->datasize;
1435 int padded_length = vub300->large_usb_packets ?
1436 ((511 + linear_length) >> 9) << 9 :
1437 ((63 + linear_length) >> 6) << 6;
1438 if ((padded_length == linear_length) || !pad_input_to_usb_pkt) {
1439 int result;
1440 unsigned pipe;
1441 pipe = usb_rcvbulkpipe(vub300->udev, vub300->data_inp_ep);
1442 result = usb_sg_init(&vub300->sg_request, vub300->udev,
1443 pipe, 0, data->sg,
1444 data->sg_len, 0, GFP_KERNEL);
1445 if (result < 0) {
1446 usb_unlink_urb(vub300->command_out_urb);
1447 usb_unlink_urb(vub300->command_res_urb);
1448 cmd->error = result;
1449 data->bytes_xfered = 0;
1450 return 0;
1451 } else {
1452 vub300->sg_transfer_timer.expires =
1453 jiffies + msecs_to_jiffies(2000 +
1454 (linear_length / 16384));
1455 add_timer(&vub300->sg_transfer_timer);
1456 usb_sg_wait(&vub300->sg_request);
1457 del_timer(&vub300->sg_transfer_timer);
1458 if (vub300->sg_request.status < 0) {
1459 cmd->error = vub300->sg_request.status;
1460 data->bytes_xfered = 0;
1461 return 0;
1462 } else {
1463 data->bytes_xfered = vub300->datasize;
1464 return linear_length;
1465 }
1466 }
1467 } else {
1468 u8 *buf = kmalloc(padded_length, GFP_KERNEL);
1469 if (buf) {
1470 int result;
1471 unsigned pipe = usb_rcvbulkpipe(vub300->udev,
1472 vub300->data_inp_ep);
1473 int actual_length = 0;
1474 result = vub300_usb_bulk_msg(vub300, pipe, buf,
1475 padded_length, &actual_length,
1476 2000 + (padded_length / 16384));
1477 if (result < 0) {
1478 cmd->error = result;
1479 data->bytes_xfered = 0;
1480 kfree(buf);
1481 return 0;
1482 } else if (actual_length < linear_length) {
1483 cmd->error = -EREMOTEIO;
1484 data->bytes_xfered = 0;
1485 kfree(buf);
1486 return 0;
1487 } else {
1488 sg_copy_from_buffer(data->sg, data->sg_len, buf,
1489 linear_length);
1490 kfree(buf);
1491 data->bytes_xfered = vub300->datasize;
1492 return linear_length;
1493 }
1494 } else {
1495 cmd->error = -ENOMEM;
1496 data->bytes_xfered = 0;
1497 return 0;
1498 }
1499 }
1500 }
1501
__command_write_data(struct vub300_mmc_host * vub300,struct mmc_command * cmd,struct mmc_data * data)1502 static int __command_write_data(struct vub300_mmc_host *vub300,
1503 struct mmc_command *cmd, struct mmc_data *data)
1504 {
1505 /* cmd_mutex is held by vub300_cmndwork_thread */
1506 unsigned pipe = usb_sndbulkpipe(vub300->udev, vub300->data_out_ep);
1507 int linear_length = vub300->datasize;
1508 int modulo_64_length = linear_length & 0x003F;
1509 int modulo_512_length = linear_length & 0x01FF;
1510 if (linear_length < 64) {
1511 int result;
1512 int actual_length;
1513 sg_copy_to_buffer(data->sg, data->sg_len,
1514 vub300->padded_buffer,
1515 sizeof(vub300->padded_buffer));
1516 memset(vub300->padded_buffer + linear_length, 0,
1517 sizeof(vub300->padded_buffer) - linear_length);
1518 result = vub300_usb_bulk_msg(vub300, pipe, vub300->padded_buffer,
1519 sizeof(vub300->padded_buffer),
1520 &actual_length, 2000 +
1521 (sizeof(vub300->padded_buffer) /
1522 16384));
1523 if (result < 0) {
1524 cmd->error = result;
1525 data->bytes_xfered = 0;
1526 } else {
1527 data->bytes_xfered = vub300->datasize;
1528 }
1529 } else if ((!vub300->large_usb_packets && (0 < modulo_64_length)) ||
1530 (vub300->large_usb_packets && (64 > modulo_512_length))
1531 ) { /* don't you just love these work-rounds */
1532 int padded_length = ((63 + linear_length) >> 6) << 6;
1533 u8 *buf = kmalloc(padded_length, GFP_KERNEL);
1534 if (buf) {
1535 int result;
1536 int actual_length;
1537 sg_copy_to_buffer(data->sg, data->sg_len, buf,
1538 padded_length);
1539 memset(buf + linear_length, 0,
1540 padded_length - linear_length);
1541 result =
1542 vub300_usb_bulk_msg(vub300, pipe, buf,
1543 padded_length, &actual_length,
1544 2000 + padded_length / 16384);
1545 kfree(buf);
1546 if (result < 0) {
1547 cmd->error = result;
1548 data->bytes_xfered = 0;
1549 } else {
1550 data->bytes_xfered = vub300->datasize;
1551 }
1552 } else {
1553 cmd->error = -ENOMEM;
1554 data->bytes_xfered = 0;
1555 }
1556 } else { /* no data padding required */
1557 int result;
1558 unsigned char buf[64 * 4];
1559 sg_copy_to_buffer(data->sg, data->sg_len, buf, sizeof(buf));
1560 result = usb_sg_init(&vub300->sg_request, vub300->udev,
1561 pipe, 0, data->sg,
1562 data->sg_len, 0, GFP_KERNEL);
1563 if (result < 0) {
1564 usb_unlink_urb(vub300->command_out_urb);
1565 usb_unlink_urb(vub300->command_res_urb);
1566 cmd->error = result;
1567 data->bytes_xfered = 0;
1568 } else {
1569 vub300->sg_transfer_timer.expires =
1570 jiffies + msecs_to_jiffies(2000 +
1571 linear_length / 16384);
1572 add_timer(&vub300->sg_transfer_timer);
1573 usb_sg_wait(&vub300->sg_request);
1574 if (cmd->error) {
1575 data->bytes_xfered = 0;
1576 } else {
1577 del_timer(&vub300->sg_transfer_timer);
1578 if (vub300->sg_request.status < 0) {
1579 cmd->error = vub300->sg_request.status;
1580 data->bytes_xfered = 0;
1581 } else {
1582 data->bytes_xfered = vub300->datasize;
1583 }
1584 }
1585 }
1586 }
1587 return linear_length;
1588 }
1589
__vub300_command_response(struct vub300_mmc_host * vub300,struct mmc_command * cmd,struct mmc_data * data,int data_length)1590 static void __vub300_command_response(struct vub300_mmc_host *vub300,
1591 struct mmc_command *cmd,
1592 struct mmc_data *data, int data_length)
1593 {
1594 /* cmd_mutex is held by vub300_cmndwork_thread */
1595 long respretval;
1596 int msec_timeout = 1000 + data_length / 4;
1597 respretval =
1598 wait_for_completion_timeout(&vub300->command_complete,
1599 msecs_to_jiffies(msec_timeout));
1600 if (respretval == 0) { /* TIMED OUT */
1601 /* we don't know which of "out" and "res" if any failed */
1602 int result;
1603 vub300->usb_timed_out = 1;
1604 usb_kill_urb(vub300->command_out_urb);
1605 usb_kill_urb(vub300->command_res_urb);
1606 cmd->error = -ETIMEDOUT;
1607 result = usb_lock_device_for_reset(vub300->udev,
1608 vub300->interface);
1609 if (result == 0) {
1610 result = usb_reset_device(vub300->udev);
1611 usb_unlock_device(vub300->udev);
1612 }
1613 } else if (respretval < 0) {
1614 /* we don't know which of "out" and "res" if any failed */
1615 usb_kill_urb(vub300->command_out_urb);
1616 usb_kill_urb(vub300->command_res_urb);
1617 cmd->error = respretval;
1618 } else if (cmd->error) {
1619 /*
1620 * the error occurred sending the command
1621 * or receiving the response
1622 */
1623 } else if (vub300->command_out_urb->status) {
1624 vub300->usb_transport_fail = vub300->command_out_urb->status;
1625 cmd->error = -EPROTO == vub300->command_out_urb->status ?
1626 -ESHUTDOWN : vub300->command_out_urb->status;
1627 } else if (vub300->command_res_urb->status) {
1628 vub300->usb_transport_fail = vub300->command_res_urb->status;
1629 cmd->error = -EPROTO == vub300->command_res_urb->status ?
1630 -ESHUTDOWN : vub300->command_res_urb->status;
1631 } else if (vub300->resp.common.header_type == 0x00) {
1632 /*
1633 * the command completed successfully
1634 * and there was no piggybacked data
1635 */
1636 } else if (vub300->resp.common.header_type == RESPONSE_ERROR) {
1637 cmd->error =
1638 vub300_response_error(vub300->resp.error.error_code);
1639 if (vub300->data)
1640 usb_sg_cancel(&vub300->sg_request);
1641 } else if (vub300->resp.common.header_type == RESPONSE_PIGGYBACKED) {
1642 int offloaded_data_length =
1643 vub300->resp.common.header_size -
1644 sizeof(struct sd_register_header);
1645 int register_count = offloaded_data_length >> 3;
1646 int ri = 0;
1647 while (register_count--) {
1648 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
1649 ri += 1;
1650 }
1651 vub300->resp.common.header_size =
1652 sizeof(struct sd_register_header);
1653 vub300->resp.common.header_type = 0x00;
1654 cmd->error = 0;
1655 } else if (vub300->resp.common.header_type == RESPONSE_PIG_DISABLED) {
1656 int offloaded_data_length =
1657 vub300->resp.common.header_size -
1658 sizeof(struct sd_register_header);
1659 int register_count = offloaded_data_length >> 3;
1660 int ri = 0;
1661 while (register_count--) {
1662 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
1663 ri += 1;
1664 }
1665 mutex_lock(&vub300->irq_mutex);
1666 if (vub300->irqs_queued) {
1667 vub300->irqs_queued += 1;
1668 } else if (vub300->irq_enabled) {
1669 vub300->irqs_queued += 1;
1670 vub300_queue_poll_work(vub300, 0);
1671 } else {
1672 vub300->irqs_queued += 1;
1673 }
1674 vub300->irq_disabled = 1;
1675 mutex_unlock(&vub300->irq_mutex);
1676 vub300->resp.common.header_size =
1677 sizeof(struct sd_register_header);
1678 vub300->resp.common.header_type = 0x00;
1679 cmd->error = 0;
1680 } else if (vub300->resp.common.header_type == RESPONSE_PIG_ENABLED) {
1681 int offloaded_data_length =
1682 vub300->resp.common.header_size -
1683 sizeof(struct sd_register_header);
1684 int register_count = offloaded_data_length >> 3;
1685 int ri = 0;
1686 while (register_count--) {
1687 add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
1688 ri += 1;
1689 }
1690 mutex_lock(&vub300->irq_mutex);
1691 if (vub300->irqs_queued) {
1692 vub300->irqs_queued += 1;
1693 } else if (vub300->irq_enabled) {
1694 vub300->irqs_queued += 1;
1695 vub300_queue_poll_work(vub300, 0);
1696 } else {
1697 vub300->irqs_queued += 1;
1698 }
1699 vub300->irq_disabled = 0;
1700 mutex_unlock(&vub300->irq_mutex);
1701 vub300->resp.common.header_size =
1702 sizeof(struct sd_register_header);
1703 vub300->resp.common.header_type = 0x00;
1704 cmd->error = 0;
1705 } else {
1706 cmd->error = -EINVAL;
1707 }
1708 }
1709
construct_request_response(struct vub300_mmc_host * vub300,struct mmc_command * cmd)1710 static void construct_request_response(struct vub300_mmc_host *vub300,
1711 struct mmc_command *cmd)
1712 {
1713 int resp_len = vub300->resp_len;
1714 int less_cmd = (17 == resp_len) ? resp_len : resp_len - 1;
1715 int bytes = 3 & less_cmd;
1716 int words = less_cmd >> 2;
1717 u8 *r = vub300->resp.response.command_response;
1718 if (bytes == 3) {
1719 cmd->resp[words] = (r[1 + (words << 2)] << 24)
1720 | (r[2 + (words << 2)] << 16)
1721 | (r[3 + (words << 2)] << 8);
1722 } else if (bytes == 2) {
1723 cmd->resp[words] = (r[1 + (words << 2)] << 24)
1724 | (r[2 + (words << 2)] << 16);
1725 } else if (bytes == 1) {
1726 cmd->resp[words] = (r[1 + (words << 2)] << 24);
1727 }
1728 while (words-- > 0) {
1729 cmd->resp[words] = (r[1 + (words << 2)] << 24)
1730 | (r[2 + (words << 2)] << 16)
1731 | (r[3 + (words << 2)] << 8)
1732 | (r[4 + (words << 2)] << 0);
1733 }
1734 if ((cmd->opcode == 53) && (0x000000FF & cmd->resp[0]))
1735 cmd->resp[0] &= 0xFFFFFF00;
1736 }
1737
1738 /* this thread runs only when there is an upper level command req outstanding */
vub300_cmndwork_thread(struct work_struct * work)1739 static void vub300_cmndwork_thread(struct work_struct *work)
1740 {
1741 struct vub300_mmc_host *vub300 =
1742 container_of(work, struct vub300_mmc_host, cmndwork);
1743 if (!vub300->interface) {
1744 kref_put(&vub300->kref, vub300_delete);
1745 return;
1746 } else {
1747 struct mmc_request *req = vub300->req;
1748 struct mmc_command *cmd = vub300->cmd;
1749 struct mmc_data *data = vub300->data;
1750 int data_length;
1751 mutex_lock(&vub300->cmd_mutex);
1752 init_completion(&vub300->command_complete);
1753 if (likely(vub300->vub_name[0]) || !vub300->mmc->card) {
1754 /*
1755 * the name of the EMPTY Pseudo firmware file
1756 * is used as a flag to indicate that the file
1757 * has been already downloaded to the VUB300 chip
1758 */
1759 } else if (0 == vub300->mmc->card->sdio_funcs) {
1760 strncpy(vub300->vub_name, "SD memory device",
1761 sizeof(vub300->vub_name));
1762 } else {
1763 download_offload_pseudocode(vub300);
1764 }
1765 send_command(vub300);
1766 if (!data)
1767 data_length = 0;
1768 else if (MMC_DATA_READ & data->flags)
1769 data_length = __command_read_data(vub300, cmd, data);
1770 else
1771 data_length = __command_write_data(vub300, cmd, data);
1772 __vub300_command_response(vub300, cmd, data, data_length);
1773 vub300->req = NULL;
1774 vub300->cmd = NULL;
1775 vub300->data = NULL;
1776 if (cmd->error) {
1777 if (cmd->error == -ENOMEDIUM)
1778 check_vub300_port_status(vub300);
1779 mutex_unlock(&vub300->cmd_mutex);
1780 mmc_request_done(vub300->mmc, req);
1781 kref_put(&vub300->kref, vub300_delete);
1782 return;
1783 } else {
1784 construct_request_response(vub300, cmd);
1785 vub300->resp_len = 0;
1786 mutex_unlock(&vub300->cmd_mutex);
1787 kref_put(&vub300->kref, vub300_delete);
1788 mmc_request_done(vub300->mmc, req);
1789 return;
1790 }
1791 }
1792 }
1793
examine_cyclic_buffer(struct vub300_mmc_host * vub300,struct mmc_command * cmd,u8 Function)1794 static int examine_cyclic_buffer(struct vub300_mmc_host *vub300,
1795 struct mmc_command *cmd, u8 Function)
1796 {
1797 /* cmd_mutex is held by vub300_mmc_request */
1798 u8 cmd0 = 0xFF & (cmd->arg >> 24);
1799 u8 cmd1 = 0xFF & (cmd->arg >> 16);
1800 u8 cmd2 = 0xFF & (cmd->arg >> 8);
1801 u8 cmd3 = 0xFF & (cmd->arg >> 0);
1802 int first = MAXREGMASK & vub300->fn[Function].offload_point;
1803 struct offload_registers_access *rf = &vub300->fn[Function].reg[first];
1804 if (cmd0 == rf->command_byte[0] &&
1805 cmd1 == rf->command_byte[1] &&
1806 cmd2 == rf->command_byte[2] &&
1807 cmd3 == rf->command_byte[3]) {
1808 u8 checksum = 0x00;
1809 cmd->resp[1] = checksum << 24;
1810 cmd->resp[0] = (rf->Respond_Byte[0] << 24)
1811 | (rf->Respond_Byte[1] << 16)
1812 | (rf->Respond_Byte[2] << 8)
1813 | (rf->Respond_Byte[3] << 0);
1814 vub300->fn[Function].offload_point += 1;
1815 vub300->fn[Function].offload_count -= 1;
1816 vub300->total_offload_count -= 1;
1817 return 1;
1818 } else {
1819 int delta = 1; /* because it does not match the first one */
1820 u8 register_count = vub300->fn[Function].offload_count - 1;
1821 u32 register_point = vub300->fn[Function].offload_point + 1;
1822 while (0 < register_count) {
1823 int point = MAXREGMASK & register_point;
1824 struct offload_registers_access *r =
1825 &vub300->fn[Function].reg[point];
1826 if (cmd0 == r->command_byte[0] &&
1827 cmd1 == r->command_byte[1] &&
1828 cmd2 == r->command_byte[2] &&
1829 cmd3 == r->command_byte[3]) {
1830 u8 checksum = 0x00;
1831 cmd->resp[1] = checksum << 24;
1832 cmd->resp[0] = (r->Respond_Byte[0] << 24)
1833 | (r->Respond_Byte[1] << 16)
1834 | (r->Respond_Byte[2] << 8)
1835 | (r->Respond_Byte[3] << 0);
1836 vub300->fn[Function].offload_point += delta;
1837 vub300->fn[Function].offload_count -= delta;
1838 vub300->total_offload_count -= delta;
1839 return 1;
1840 } else {
1841 register_point += 1;
1842 register_count -= 1;
1843 delta += 1;
1844 continue;
1845 }
1846 }
1847 return 0;
1848 }
1849 }
1850
satisfy_request_from_offloaded_data(struct vub300_mmc_host * vub300,struct mmc_command * cmd)1851 static int satisfy_request_from_offloaded_data(struct vub300_mmc_host *vub300,
1852 struct mmc_command *cmd)
1853 {
1854 /* cmd_mutex is held by vub300_mmc_request */
1855 u8 regs = vub300->dynamic_register_count;
1856 u8 i = 0;
1857 u8 func = FUN(cmd);
1858 u32 reg = REG(cmd);
1859 while (0 < regs--) {
1860 if ((vub300->sdio_register[i].func_num == func) &&
1861 (vub300->sdio_register[i].sdio_reg == reg)) {
1862 if (!vub300->sdio_register[i].prepared) {
1863 return 0;
1864 } else if ((0x80000000 & cmd->arg) == 0x80000000) {
1865 /*
1866 * a write to a dynamic register
1867 * nullifies our offloaded value
1868 */
1869 vub300->sdio_register[i].prepared = 0;
1870 return 0;
1871 } else {
1872 u8 checksum = 0x00;
1873 u8 rsp0 = 0x00;
1874 u8 rsp1 = 0x00;
1875 u8 rsp2 = vub300->sdio_register[i].response;
1876 u8 rsp3 = vub300->sdio_register[i].regvalue;
1877 vub300->sdio_register[i].prepared = 0;
1878 cmd->resp[1] = checksum << 24;
1879 cmd->resp[0] = (rsp0 << 24)
1880 | (rsp1 << 16)
1881 | (rsp2 << 8)
1882 | (rsp3 << 0);
1883 return 1;
1884 }
1885 } else {
1886 i += 1;
1887 continue;
1888 }
1889 }
1890 if (vub300->total_offload_count == 0)
1891 return 0;
1892 else if (vub300->fn[func].offload_count == 0)
1893 return 0;
1894 else
1895 return examine_cyclic_buffer(vub300, cmd, func);
1896 }
1897
vub300_mmc_request(struct mmc_host * mmc,struct mmc_request * req)1898 static void vub300_mmc_request(struct mmc_host *mmc, struct mmc_request *req)
1899 { /* NOT irq */
1900 struct mmc_command *cmd = req->cmd;
1901 struct vub300_mmc_host *vub300 = mmc_priv(mmc);
1902 if (!vub300->interface) {
1903 cmd->error = -ESHUTDOWN;
1904 mmc_request_done(mmc, req);
1905 return;
1906 } else {
1907 struct mmc_data *data = req->data;
1908 if (!vub300->card_powered) {
1909 cmd->error = -ENOMEDIUM;
1910 mmc_request_done(mmc, req);
1911 return;
1912 }
1913 if (!vub300->card_present) {
1914 cmd->error = -ENOMEDIUM;
1915 mmc_request_done(mmc, req);
1916 return;
1917 }
1918 if (vub300->usb_transport_fail) {
1919 cmd->error = vub300->usb_transport_fail;
1920 mmc_request_done(mmc, req);
1921 return;
1922 }
1923 if (!vub300->interface) {
1924 cmd->error = -ENODEV;
1925 mmc_request_done(mmc, req);
1926 return;
1927 }
1928 kref_get(&vub300->kref);
1929 mutex_lock(&vub300->cmd_mutex);
1930 mod_timer(&vub300->inactivity_timer, jiffies + HZ);
1931 /*
1932 * for performance we have to return immediately
1933 * if the requested data has been offloaded
1934 */
1935 if (cmd->opcode == 52 &&
1936 satisfy_request_from_offloaded_data(vub300, cmd)) {
1937 cmd->error = 0;
1938 mutex_unlock(&vub300->cmd_mutex);
1939 kref_put(&vub300->kref, vub300_delete);
1940 mmc_request_done(mmc, req);
1941 return;
1942 } else {
1943 vub300->cmd = cmd;
1944 vub300->req = req;
1945 vub300->data = data;
1946 if (data)
1947 vub300->datasize = data->blksz * data->blocks;
1948 else
1949 vub300->datasize = 0;
1950 vub300_queue_cmnd_work(vub300);
1951 mutex_unlock(&vub300->cmd_mutex);
1952 kref_put(&vub300->kref, vub300_delete);
1953 /*
1954 * the kernel lock diagnostics complain
1955 * if the cmd_mutex * is "passed on"
1956 * to the cmndwork thread,
1957 * so we must release it now
1958 * and re-acquire it in the cmndwork thread
1959 */
1960 }
1961 }
1962 }
1963
__set_clock_speed(struct vub300_mmc_host * vub300,u8 buf[8],struct mmc_ios * ios)1964 static void __set_clock_speed(struct vub300_mmc_host *vub300, u8 buf[8],
1965 struct mmc_ios *ios)
1966 {
1967 int buf_array_size = 8; /* ARRAY_SIZE(buf) does not work !!! */
1968 int retval;
1969 u32 kHzClock;
1970 if (ios->clock >= 48000000)
1971 kHzClock = 48000;
1972 else if (ios->clock >= 24000000)
1973 kHzClock = 24000;
1974 else if (ios->clock >= 20000000)
1975 kHzClock = 20000;
1976 else if (ios->clock >= 15000000)
1977 kHzClock = 15000;
1978 else if (ios->clock >= 200000)
1979 kHzClock = 200;
1980 else
1981 kHzClock = 0;
1982 {
1983 int i;
1984 u64 c = kHzClock;
1985 for (i = 0; i < buf_array_size; i++) {
1986 buf[i] = c;
1987 c >>= 8;
1988 }
1989 }
1990 retval =
1991 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
1992 SET_CLOCK_SPEED,
1993 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1994 0x00, 0x00, buf, buf_array_size, HZ);
1995 if (retval != 8) {
1996 dev_err(&vub300->udev->dev, "SET_CLOCK_SPEED"
1997 " %dkHz failed with retval=%d\n", kHzClock, retval);
1998 } else {
1999 dev_dbg(&vub300->udev->dev, "SET_CLOCK_SPEED"
2000 " %dkHz\n", kHzClock);
2001 }
2002 }
2003
vub300_mmc_set_ios(struct mmc_host * mmc,struct mmc_ios * ios)2004 static void vub300_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
2005 { /* NOT irq */
2006 struct vub300_mmc_host *vub300 = mmc_priv(mmc);
2007 if (!vub300->interface)
2008 return;
2009 kref_get(&vub300->kref);
2010 mutex_lock(&vub300->cmd_mutex);
2011 if ((ios->power_mode == MMC_POWER_OFF) && vub300->card_powered) {
2012 vub300->card_powered = 0;
2013 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
2014 SET_SD_POWER,
2015 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2016 0x0000, 0x0000, NULL, 0, HZ);
2017 /* must wait for the VUB300 u-proc to boot up */
2018 msleep(600);
2019 } else if ((ios->power_mode == MMC_POWER_UP) && !vub300->card_powered) {
2020 usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
2021 SET_SD_POWER,
2022 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2023 0x0001, 0x0000, NULL, 0, HZ);
2024 msleep(600);
2025 vub300->card_powered = 1;
2026 } else if (ios->power_mode == MMC_POWER_ON) {
2027 u8 *buf = kmalloc(8, GFP_KERNEL);
2028 if (buf) {
2029 __set_clock_speed(vub300, buf, ios);
2030 kfree(buf);
2031 }
2032 } else {
2033 /* this should mean no change of state */
2034 }
2035 mutex_unlock(&vub300->cmd_mutex);
2036 kref_put(&vub300->kref, vub300_delete);
2037 }
2038
vub300_mmc_get_ro(struct mmc_host * mmc)2039 static int vub300_mmc_get_ro(struct mmc_host *mmc)
2040 {
2041 struct vub300_mmc_host *vub300 = mmc_priv(mmc);
2042 return vub300->read_only;
2043 }
2044
vub300_enable_sdio_irq(struct mmc_host * mmc,int enable)2045 static void vub300_enable_sdio_irq(struct mmc_host *mmc, int enable)
2046 { /* NOT irq */
2047 struct vub300_mmc_host *vub300 = mmc_priv(mmc);
2048 if (!vub300->interface)
2049 return;
2050 kref_get(&vub300->kref);
2051 if (enable) {
2052 mutex_lock(&vub300->irq_mutex);
2053 if (vub300->irqs_queued) {
2054 vub300->irqs_queued -= 1;
2055 mmc_signal_sdio_irq(vub300->mmc);
2056 } else if (vub300->irq_disabled) {
2057 vub300->irq_disabled = 0;
2058 vub300->irq_enabled = 1;
2059 vub300_queue_poll_work(vub300, 0);
2060 } else if (vub300->irq_enabled) {
2061 /* this should not happen, so we will just ignore it */
2062 } else {
2063 vub300->irq_enabled = 1;
2064 vub300_queue_poll_work(vub300, 0);
2065 }
2066 mutex_unlock(&vub300->irq_mutex);
2067 } else {
2068 vub300->irq_enabled = 0;
2069 }
2070 kref_put(&vub300->kref, vub300_delete);
2071 }
2072
2073 static const struct mmc_host_ops vub300_mmc_ops = {
2074 .request = vub300_mmc_request,
2075 .set_ios = vub300_mmc_set_ios,
2076 .get_ro = vub300_mmc_get_ro,
2077 .enable_sdio_irq = vub300_enable_sdio_irq,
2078 };
2079
vub300_probe(struct usb_interface * interface,const struct usb_device_id * id)2080 static int vub300_probe(struct usb_interface *interface,
2081 const struct usb_device_id *id)
2082 { /* NOT irq */
2083 struct vub300_mmc_host *vub300;
2084 struct usb_host_interface *iface_desc;
2085 struct usb_device *udev = usb_get_dev(interface_to_usbdev(interface));
2086 int i;
2087 int retval = -ENOMEM;
2088 struct urb *command_out_urb;
2089 struct urb *command_res_urb;
2090 struct mmc_host *mmc;
2091 char manufacturer[48];
2092 char product[32];
2093 char serial_number[32];
2094 usb_string(udev, udev->descriptor.iManufacturer, manufacturer,
2095 sizeof(manufacturer));
2096 usb_string(udev, udev->descriptor.iProduct, product, sizeof(product));
2097 usb_string(udev, udev->descriptor.iSerialNumber, serial_number,
2098 sizeof(serial_number));
2099 dev_info(&udev->dev, "probing VID:PID(%04X:%04X) %s %s %s\n",
2100 le16_to_cpu(udev->descriptor.idVendor),
2101 le16_to_cpu(udev->descriptor.idProduct),
2102 manufacturer, product, serial_number);
2103 command_out_urb = usb_alloc_urb(0, GFP_KERNEL);
2104 if (!command_out_urb) {
2105 retval = -ENOMEM;
2106 goto error0;
2107 }
2108 command_res_urb = usb_alloc_urb(0, GFP_KERNEL);
2109 if (!command_res_urb) {
2110 retval = -ENOMEM;
2111 goto error1;
2112 }
2113 /* this also allocates memory for our VUB300 mmc host device */
2114 mmc = mmc_alloc_host(sizeof(struct vub300_mmc_host), &udev->dev);
2115 if (!mmc) {
2116 retval = -ENOMEM;
2117 dev_err(&udev->dev, "not enough memory for the mmc_host\n");
2118 goto error4;
2119 }
2120 /* MMC core transfer sizes tunable parameters */
2121 mmc->caps = 0;
2122 if (!force_1_bit_data_xfers)
2123 mmc->caps |= MMC_CAP_4_BIT_DATA;
2124 if (!force_polling_for_irqs)
2125 mmc->caps |= MMC_CAP_SDIO_IRQ;
2126 mmc->caps &= ~MMC_CAP_NEEDS_POLL;
2127 /*
2128 * MMC_CAP_NEEDS_POLL causes core.c:mmc_rescan() to poll
2129 * for devices which results in spurious CMD7's being
2130 * issued which stops some SDIO cards from working
2131 */
2132 if (limit_speed_to_24_MHz) {
2133 mmc->caps |= MMC_CAP_MMC_HIGHSPEED;
2134 mmc->caps |= MMC_CAP_SD_HIGHSPEED;
2135 mmc->f_max = 24000000;
2136 dev_info(&udev->dev, "limiting SDIO speed to 24_MHz\n");
2137 } else {
2138 mmc->caps |= MMC_CAP_MMC_HIGHSPEED;
2139 mmc->caps |= MMC_CAP_SD_HIGHSPEED;
2140 mmc->f_max = 48000000;
2141 }
2142 mmc->f_min = 200000;
2143 mmc->max_blk_count = 511;
2144 mmc->max_blk_size = 512;
2145 mmc->max_segs = 128;
2146 if (force_max_req_size)
2147 mmc->max_req_size = force_max_req_size * 1024;
2148 else
2149 mmc->max_req_size = 64 * 1024;
2150 mmc->max_seg_size = mmc->max_req_size;
2151 mmc->ocr_avail = 0;
2152 mmc->ocr_avail |= MMC_VDD_165_195;
2153 mmc->ocr_avail |= MMC_VDD_20_21;
2154 mmc->ocr_avail |= MMC_VDD_21_22;
2155 mmc->ocr_avail |= MMC_VDD_22_23;
2156 mmc->ocr_avail |= MMC_VDD_23_24;
2157 mmc->ocr_avail |= MMC_VDD_24_25;
2158 mmc->ocr_avail |= MMC_VDD_25_26;
2159 mmc->ocr_avail |= MMC_VDD_26_27;
2160 mmc->ocr_avail |= MMC_VDD_27_28;
2161 mmc->ocr_avail |= MMC_VDD_28_29;
2162 mmc->ocr_avail |= MMC_VDD_29_30;
2163 mmc->ocr_avail |= MMC_VDD_30_31;
2164 mmc->ocr_avail |= MMC_VDD_31_32;
2165 mmc->ocr_avail |= MMC_VDD_32_33;
2166 mmc->ocr_avail |= MMC_VDD_33_34;
2167 mmc->ocr_avail |= MMC_VDD_34_35;
2168 mmc->ocr_avail |= MMC_VDD_35_36;
2169 mmc->ops = &vub300_mmc_ops;
2170 vub300 = mmc_priv(mmc);
2171 vub300->mmc = mmc;
2172 vub300->card_powered = 0;
2173 vub300->bus_width = 0;
2174 vub300->cmnd.head.block_size[0] = 0x00;
2175 vub300->cmnd.head.block_size[1] = 0x00;
2176 vub300->app_spec = 0;
2177 mutex_init(&vub300->cmd_mutex);
2178 mutex_init(&vub300->irq_mutex);
2179 vub300->command_out_urb = command_out_urb;
2180 vub300->command_res_urb = command_res_urb;
2181 vub300->usb_timed_out = 0;
2182 vub300->dynamic_register_count = 0;
2183
2184 for (i = 0; i < ARRAY_SIZE(vub300->fn); i++) {
2185 vub300->fn[i].offload_point = 0;
2186 vub300->fn[i].offload_count = 0;
2187 }
2188
2189 vub300->total_offload_count = 0;
2190 vub300->irq_enabled = 0;
2191 vub300->irq_disabled = 0;
2192 vub300->irqs_queued = 0;
2193
2194 for (i = 0; i < ARRAY_SIZE(vub300->sdio_register); i++)
2195 vub300->sdio_register[i++].activate = 0;
2196
2197 vub300->udev = udev;
2198 vub300->interface = interface;
2199 vub300->cmnd_res_ep = 0;
2200 vub300->cmnd_out_ep = 0;
2201 vub300->data_inp_ep = 0;
2202 vub300->data_out_ep = 0;
2203
2204 for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++)
2205 vub300->fbs[i] = 512;
2206
2207 /*
2208 * set up the endpoint information
2209 *
2210 * use the first pair of bulk-in and bulk-out
2211 * endpoints for Command/Response+Interrupt
2212 *
2213 * use the second pair of bulk-in and bulk-out
2214 * endpoints for Data In/Out
2215 */
2216 vub300->large_usb_packets = 0;
2217 iface_desc = interface->cur_altsetting;
2218 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2219 struct usb_endpoint_descriptor *endpoint =
2220 &iface_desc->endpoint[i].desc;
2221 dev_info(&vub300->udev->dev,
2222 "vub300 testing %s EndPoint(%d) %02X\n",
2223 usb_endpoint_is_bulk_in(endpoint) ? "BULK IN" :
2224 usb_endpoint_is_bulk_out(endpoint) ? "BULK OUT" :
2225 "UNKNOWN", i, endpoint->bEndpointAddress);
2226 if (endpoint->wMaxPacketSize > 64)
2227 vub300->large_usb_packets = 1;
2228 if (usb_endpoint_is_bulk_in(endpoint)) {
2229 if (!vub300->cmnd_res_ep) {
2230 vub300->cmnd_res_ep =
2231 endpoint->bEndpointAddress;
2232 } else if (!vub300->data_inp_ep) {
2233 vub300->data_inp_ep =
2234 endpoint->bEndpointAddress;
2235 } else {
2236 dev_warn(&vub300->udev->dev,
2237 "ignoring"
2238 " unexpected bulk_in endpoint");
2239 }
2240 } else if (usb_endpoint_is_bulk_out(endpoint)) {
2241 if (!vub300->cmnd_out_ep) {
2242 vub300->cmnd_out_ep =
2243 endpoint->bEndpointAddress;
2244 } else if (!vub300->data_out_ep) {
2245 vub300->data_out_ep =
2246 endpoint->bEndpointAddress;
2247 } else {
2248 dev_warn(&vub300->udev->dev,
2249 "ignoring"
2250 " unexpected bulk_out endpoint");
2251 }
2252 } else {
2253 dev_warn(&vub300->udev->dev,
2254 "vub300 ignoring EndPoint(%d) %02X", i,
2255 endpoint->bEndpointAddress);
2256 }
2257 }
2258 if (vub300->cmnd_res_ep && vub300->cmnd_out_ep &&
2259 vub300->data_inp_ep && vub300->data_out_ep) {
2260 dev_info(&vub300->udev->dev,
2261 "vub300 %s packets"
2262 " using EndPoints %02X %02X %02X %02X\n",
2263 vub300->large_usb_packets ? "LARGE" : "SMALL",
2264 vub300->cmnd_out_ep, vub300->cmnd_res_ep,
2265 vub300->data_out_ep, vub300->data_inp_ep);
2266 /* we have the expected EndPoints */
2267 } else {
2268 dev_err(&vub300->udev->dev,
2269 "Could not find two sets of bulk-in/out endpoint pairs\n");
2270 retval = -EINVAL;
2271 goto error5;
2272 }
2273 retval =
2274 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
2275 GET_HC_INF0,
2276 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2277 0x0000, 0x0000, &vub300->hc_info,
2278 sizeof(vub300->hc_info), HZ);
2279 if (retval < 0)
2280 goto error5;
2281 retval =
2282 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
2283 SET_ROM_WAIT_STATES,
2284 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2285 firmware_rom_wait_states, 0x0000, NULL, 0, HZ);
2286 if (retval < 0)
2287 goto error5;
2288 dev_info(&vub300->udev->dev,
2289 "operating_mode = %s %s %d MHz %s %d byte USB packets\n",
2290 (mmc->caps & MMC_CAP_SDIO_IRQ) ? "IRQs" : "POLL",
2291 (mmc->caps & MMC_CAP_4_BIT_DATA) ? "4-bit" : "1-bit",
2292 mmc->f_max / 1000000,
2293 pad_input_to_usb_pkt ? "padding input data to" : "with",
2294 vub300->large_usb_packets ? 512 : 64);
2295 retval =
2296 usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
2297 GET_SYSTEM_PORT_STATUS,
2298 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2299 0x0000, 0x0000, &vub300->system_port_status,
2300 sizeof(vub300->system_port_status), HZ);
2301 if (retval < 0) {
2302 goto error4;
2303 } else if (sizeof(vub300->system_port_status) == retval) {
2304 vub300->card_present =
2305 (0x0001 & vub300->system_port_status.port_flags) ? 1 : 0;
2306 vub300->read_only =
2307 (0x0010 & vub300->system_port_status.port_flags) ? 1 : 0;
2308 } else {
2309 goto error4;
2310 }
2311 usb_set_intfdata(interface, vub300);
2312 INIT_DELAYED_WORK(&vub300->pollwork, vub300_pollwork_thread);
2313 INIT_WORK(&vub300->cmndwork, vub300_cmndwork_thread);
2314 INIT_WORK(&vub300->deadwork, vub300_deadwork_thread);
2315 kref_init(&vub300->kref);
2316 timer_setup(&vub300->sg_transfer_timer, vub300_sg_timed_out, 0);
2317 kref_get(&vub300->kref);
2318 timer_setup(&vub300->inactivity_timer,
2319 vub300_inactivity_timer_expired, 0);
2320 vub300->inactivity_timer.expires = jiffies + HZ;
2321 add_timer(&vub300->inactivity_timer);
2322 if (vub300->card_present)
2323 dev_info(&vub300->udev->dev,
2324 "USB vub300 remote SDIO host controller[%d]"
2325 "connected with SD/SDIO card inserted\n",
2326 interface_to_InterfaceNumber(interface));
2327 else
2328 dev_info(&vub300->udev->dev,
2329 "USB vub300 remote SDIO host controller[%d]"
2330 "connected with no SD/SDIO card inserted\n",
2331 interface_to_InterfaceNumber(interface));
2332 mmc_add_host(mmc);
2333 return 0;
2334 error5:
2335 mmc_free_host(mmc);
2336 /*
2337 * and hence also frees vub300
2338 * which is contained at the end of struct mmc
2339 */
2340 error4:
2341 usb_free_urb(command_res_urb);
2342 error1:
2343 usb_free_urb(command_out_urb);
2344 error0:
2345 usb_put_dev(udev);
2346 return retval;
2347 }
2348
vub300_disconnect(struct usb_interface * interface)2349 static void vub300_disconnect(struct usb_interface *interface)
2350 { /* NOT irq */
2351 struct vub300_mmc_host *vub300 = usb_get_intfdata(interface);
2352 if (!vub300 || !vub300->mmc) {
2353 return;
2354 } else {
2355 struct mmc_host *mmc = vub300->mmc;
2356 if (!vub300->mmc) {
2357 return;
2358 } else {
2359 int ifnum = interface_to_InterfaceNumber(interface);
2360 usb_set_intfdata(interface, NULL);
2361 /* prevent more I/O from starting */
2362 vub300->interface = NULL;
2363 kref_put(&vub300->kref, vub300_delete);
2364 mmc_remove_host(mmc);
2365 pr_info("USB vub300 remote SDIO host controller[%d]"
2366 " now disconnected", ifnum);
2367 return;
2368 }
2369 }
2370 }
2371
2372 #ifdef CONFIG_PM
vub300_suspend(struct usb_interface * intf,pm_message_t message)2373 static int vub300_suspend(struct usb_interface *intf, pm_message_t message)
2374 {
2375 return 0;
2376 }
2377
vub300_resume(struct usb_interface * intf)2378 static int vub300_resume(struct usb_interface *intf)
2379 {
2380 return 0;
2381 }
2382 #else
2383 #define vub300_suspend NULL
2384 #define vub300_resume NULL
2385 #endif
vub300_pre_reset(struct usb_interface * intf)2386 static int vub300_pre_reset(struct usb_interface *intf)
2387 { /* NOT irq */
2388 struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
2389 mutex_lock(&vub300->cmd_mutex);
2390 return 0;
2391 }
2392
vub300_post_reset(struct usb_interface * intf)2393 static int vub300_post_reset(struct usb_interface *intf)
2394 { /* NOT irq */
2395 struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
2396 /* we are sure no URBs are active - no locking needed */
2397 vub300->errors = -EPIPE;
2398 mutex_unlock(&vub300->cmd_mutex);
2399 return 0;
2400 }
2401
2402 static struct usb_driver vub300_driver = {
2403 .name = "vub300",
2404 .probe = vub300_probe,
2405 .disconnect = vub300_disconnect,
2406 .suspend = vub300_suspend,
2407 .resume = vub300_resume,
2408 .pre_reset = vub300_pre_reset,
2409 .post_reset = vub300_post_reset,
2410 .id_table = vub300_table,
2411 .supports_autosuspend = 1,
2412 };
2413
vub300_init(void)2414 static int __init vub300_init(void)
2415 { /* NOT irq */
2416 int result;
2417
2418 pr_info("VUB300 Driver rom wait states = %02X irqpoll timeout = %04X",
2419 firmware_rom_wait_states, 0x0FFFF & firmware_irqpoll_timeout);
2420 cmndworkqueue = create_singlethread_workqueue("kvub300c");
2421 if (!cmndworkqueue) {
2422 pr_err("not enough memory for the REQUEST workqueue");
2423 result = -ENOMEM;
2424 goto out1;
2425 }
2426 pollworkqueue = create_singlethread_workqueue("kvub300p");
2427 if (!pollworkqueue) {
2428 pr_err("not enough memory for the IRQPOLL workqueue");
2429 result = -ENOMEM;
2430 goto out2;
2431 }
2432 deadworkqueue = create_singlethread_workqueue("kvub300d");
2433 if (!deadworkqueue) {
2434 pr_err("not enough memory for the EXPIRED workqueue");
2435 result = -ENOMEM;
2436 goto out3;
2437 }
2438 result = usb_register(&vub300_driver);
2439 if (result) {
2440 pr_err("usb_register failed. Error number %d", result);
2441 goto out4;
2442 }
2443 return 0;
2444 out4:
2445 destroy_workqueue(deadworkqueue);
2446 out3:
2447 destroy_workqueue(pollworkqueue);
2448 out2:
2449 destroy_workqueue(cmndworkqueue);
2450 out1:
2451 return result;
2452 }
2453
vub300_exit(void)2454 static void __exit vub300_exit(void)
2455 {
2456 usb_deregister(&vub300_driver);
2457 flush_workqueue(cmndworkqueue);
2458 flush_workqueue(pollworkqueue);
2459 flush_workqueue(deadworkqueue);
2460 destroy_workqueue(cmndworkqueue);
2461 destroy_workqueue(pollworkqueue);
2462 destroy_workqueue(deadworkqueue);
2463 }
2464
2465 module_init(vub300_init);
2466 module_exit(vub300_exit);
2467
2468 MODULE_AUTHOR("Tony Olech <tony.olech@elandigitalsystems.com>");
2469 MODULE_DESCRIPTION("VUB300 USB to SD/MMC/SDIO adapter driver");
2470 MODULE_LICENSE("GPL");
2471