1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Driver for Realtek RTS51xx USB card reader
4  *
5  * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
6  *
7  * Author:
8  *   wwang (wei_wang@realsil.com.cn)
9  *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
10  */
11 
12 #include <linux/module.h>
13 #include <linux/blkdev.h>
14 #include <linux/kthread.h>
15 #include <linux/sched.h>
16 #include <linux/kernel.h>
17 
18 #include <scsi/scsi.h>
19 #include <scsi/scsi_cmnd.h>
20 #include <scsi/scsi_device.h>
21 #include <linux/cdrom.h>
22 
23 #include <linux/usb.h>
24 #include <linux/slab.h>
25 #include <linux/usb_usual.h>
26 
27 #include "usb.h"
28 #include "transport.h"
29 #include "protocol.h"
30 #include "debug.h"
31 #include "scsiglue.h"
32 
33 #define DRV_NAME "ums-realtek"
34 
35 MODULE_DESCRIPTION("Driver for Realtek USB Card Reader");
36 MODULE_AUTHOR("wwang <wei_wang@realsil.com.cn>");
37 MODULE_LICENSE("GPL");
38 MODULE_IMPORT_NS(USB_STORAGE);
39 
40 static int auto_delink_en = 1;
41 module_param(auto_delink_en, int, S_IRUGO | S_IWUSR);
42 MODULE_PARM_DESC(auto_delink_en, "auto delink mode (0=firmware, 1=software [default])");
43 
44 #ifdef CONFIG_REALTEK_AUTOPM
45 static int ss_en = 1;
46 module_param(ss_en, int, S_IRUGO | S_IWUSR);
47 MODULE_PARM_DESC(ss_en, "enable selective suspend");
48 
49 static int ss_delay = 50;
50 module_param(ss_delay, int, S_IRUGO | S_IWUSR);
51 MODULE_PARM_DESC(ss_delay,
52 		 "seconds to delay before entering selective suspend");
53 
54 enum RTS51X_STAT {
55 	RTS51X_STAT_INIT,
56 	RTS51X_STAT_IDLE,
57 	RTS51X_STAT_RUN,
58 	RTS51X_STAT_SS
59 };
60 
61 #define POLLING_INTERVAL	50
62 
63 #define rts51x_set_stat(chip, stat)	\
64 	((chip)->state = (enum RTS51X_STAT)(stat))
65 #define rts51x_get_stat(chip)		((chip)->state)
66 
67 #define SET_LUN_READY(chip, lun)	((chip)->lun_ready |= ((u8)1 << (lun)))
68 #define CLR_LUN_READY(chip, lun)	((chip)->lun_ready &= ~((u8)1 << (lun)))
69 #define TST_LUN_READY(chip, lun)	((chip)->lun_ready & ((u8)1 << (lun)))
70 
71 #endif
72 
73 struct rts51x_status {
74 	u16 vid;
75 	u16 pid;
76 	u8 cur_lun;
77 	u8 card_type;
78 	u8 total_lun;
79 	u16 fw_ver;
80 	u8 phy_exist;
81 	u8 multi_flag;
82 	u8 multi_card;
83 	u8 log_exist;
84 	union {
85 		u8 detailed_type1;
86 		u8 detailed_type2;
87 	} detailed_type;
88 	u8 function[2];
89 };
90 
91 struct rts51x_chip {
92 	u16 vendor_id;
93 	u16 product_id;
94 	char max_lun;
95 
96 	struct rts51x_status *status;
97 	int status_len;
98 
99 	u32 flag;
100 	struct us_data *us;
101 
102 #ifdef CONFIG_REALTEK_AUTOPM
103 	struct timer_list rts51x_suspend_timer;
104 	unsigned long timer_expires;
105 	int pwr_state;
106 	u8 lun_ready;
107 	enum RTS51X_STAT state;
108 	int support_auto_delink;
109 #endif
110 	/* used to back up the protocol chosen in probe1 phase */
111 	proto_cmnd proto_handler_backup;
112 };
113 
114 /* flag definition */
115 #define FLIDX_AUTO_DELINK		0x01
116 
117 #define SCSI_LUN(srb)			((srb)->device->lun)
118 
119 /* Bit Operation */
120 #define SET_BIT(data, idx)		((data) |= 1 << (idx))
121 #define CLR_BIT(data, idx)		((data) &= ~(1 << (idx)))
122 #define CHK_BIT(data, idx)		((data) & (1 << (idx)))
123 
124 #define SET_AUTO_DELINK(chip)		((chip)->flag |= FLIDX_AUTO_DELINK)
125 #define CLR_AUTO_DELINK(chip)		((chip)->flag &= ~FLIDX_AUTO_DELINK)
126 #define CHK_AUTO_DELINK(chip)		((chip)->flag & FLIDX_AUTO_DELINK)
127 
128 #define RTS51X_GET_VID(chip)		((chip)->vendor_id)
129 #define RTS51X_GET_PID(chip)		((chip)->product_id)
130 
131 #define VENDOR_ID(chip)			((chip)->status[0].vid)
132 #define PRODUCT_ID(chip)		((chip)->status[0].pid)
133 #define FW_VERSION(chip)		((chip)->status[0].fw_ver)
134 #define STATUS_LEN(chip)		((chip)->status_len)
135 
136 #define STATUS_SUCCESS		0
137 #define STATUS_FAIL		1
138 
139 /* Check card reader function */
140 #define SUPPORT_DETAILED_TYPE1(chip)	\
141 		CHK_BIT((chip)->status[0].function[0], 1)
142 #define SUPPORT_OT(chip)		\
143 		CHK_BIT((chip)->status[0].function[0], 2)
144 #define SUPPORT_OC(chip)		\
145 		CHK_BIT((chip)->status[0].function[0], 3)
146 #define SUPPORT_AUTO_DELINK(chip)	\
147 		CHK_BIT((chip)->status[0].function[0], 4)
148 #define SUPPORT_SDIO(chip)		\
149 		CHK_BIT((chip)->status[0].function[1], 0)
150 #define SUPPORT_DETAILED_TYPE2(chip)	\
151 		CHK_BIT((chip)->status[0].function[1], 1)
152 
153 #define CHECK_PID(chip, pid)		(RTS51X_GET_PID(chip) == (pid))
154 #define CHECK_FW_VER(chip, fw_ver)	(FW_VERSION(chip) == (fw_ver))
155 #define CHECK_ID(chip, pid, fw_ver)	\
156 		(CHECK_PID((chip), (pid)) && CHECK_FW_VER((chip), (fw_ver)))
157 
158 static int init_realtek_cr(struct us_data *us);
159 
160 /*
161  * The table of devices
162  */
163 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
164 		    vendorName, productName, useProtocol, useTransport, \
165 		    initFunction, flags) \
166 {\
167 	USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
168 	.driver_info = (flags) \
169 }
170 
171 static const struct usb_device_id realtek_cr_ids[] = {
172 #	include "unusual_realtek.h"
173 	{}			/* Terminating entry */
174 };
175 
176 MODULE_DEVICE_TABLE(usb, realtek_cr_ids);
177 
178 #undef UNUSUAL_DEV
179 
180 /*
181  * The flags table
182  */
183 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
184 		    vendor_name, product_name, use_protocol, use_transport, \
185 		    init_function, Flags) \
186 { \
187 	.vendorName = vendor_name,	\
188 	.productName = product_name,	\
189 	.useProtocol = use_protocol,	\
190 	.useTransport = use_transport,	\
191 	.initFunction = init_function,	\
192 }
193 
194 static struct us_unusual_dev realtek_cr_unusual_dev_list[] = {
195 #	include "unusual_realtek.h"
196 	{}			/* Terminating entry */
197 };
198 
199 #undef UNUSUAL_DEV
200 
rts51x_bulk_transport(struct us_data * us,u8 lun,u8 * cmd,int cmd_len,u8 * buf,int buf_len,enum dma_data_direction dir,int * act_len)201 static int rts51x_bulk_transport(struct us_data *us, u8 lun,
202 				 u8 *cmd, int cmd_len, u8 *buf, int buf_len,
203 				 enum dma_data_direction dir, int *act_len)
204 {
205 	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *)us->iobuf;
206 	struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *)us->iobuf;
207 	int result;
208 	unsigned int residue;
209 	unsigned int cswlen;
210 	unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
211 
212 	/* set up the command wrapper */
213 	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
214 	bcb->DataTransferLength = cpu_to_le32(buf_len);
215 	bcb->Flags = (dir == DMA_FROM_DEVICE) ? US_BULK_FLAG_IN : 0;
216 	bcb->Tag = ++us->tag;
217 	bcb->Lun = lun;
218 	bcb->Length = cmd_len;
219 
220 	/* copy the command payload */
221 	memset(bcb->CDB, 0, sizeof(bcb->CDB));
222 	memcpy(bcb->CDB, cmd, bcb->Length);
223 
224 	/* send it to out endpoint */
225 	result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
226 					    bcb, cbwlen, NULL);
227 	if (result != USB_STOR_XFER_GOOD)
228 		return USB_STOR_TRANSPORT_ERROR;
229 
230 	/* DATA STAGE */
231 	/* send/receive data payload, if there is any */
232 
233 	if (buf && buf_len) {
234 		unsigned int pipe = (dir == DMA_FROM_DEVICE) ?
235 		    us->recv_bulk_pipe : us->send_bulk_pipe;
236 		result = usb_stor_bulk_transfer_buf(us, pipe,
237 						    buf, buf_len, NULL);
238 		if (result == USB_STOR_XFER_ERROR)
239 			return USB_STOR_TRANSPORT_ERROR;
240 	}
241 
242 	/* get CSW for device status */
243 	result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
244 					    bcs, US_BULK_CS_WRAP_LEN, &cswlen);
245 	if (result != USB_STOR_XFER_GOOD)
246 		return USB_STOR_TRANSPORT_ERROR;
247 
248 	/* check bulk status */
249 	if (bcs->Signature != cpu_to_le32(US_BULK_CS_SIGN)) {
250 		usb_stor_dbg(us, "Signature mismatch: got %08X, expecting %08X\n",
251 			     le32_to_cpu(bcs->Signature), US_BULK_CS_SIGN);
252 		return USB_STOR_TRANSPORT_ERROR;
253 	}
254 
255 	residue = bcs->Residue;
256 	if (bcs->Tag != us->tag)
257 		return USB_STOR_TRANSPORT_ERROR;
258 
259 	/*
260 	 * try to compute the actual residue, based on how much data
261 	 * was really transferred and what the device tells us
262 	 */
263 	if (residue)
264 		residue = residue < buf_len ? residue : buf_len;
265 
266 	if (act_len)
267 		*act_len = buf_len - residue;
268 
269 	/* based on the status code, we report good or bad */
270 	switch (bcs->Status) {
271 	case US_BULK_STAT_OK:
272 		/* command good -- note that data could be short */
273 		return USB_STOR_TRANSPORT_GOOD;
274 
275 	case US_BULK_STAT_FAIL:
276 		/* command failed */
277 		return USB_STOR_TRANSPORT_FAILED;
278 
279 	case US_BULK_STAT_PHASE:
280 		/*
281 		 * phase error -- note that a transport reset will be
282 		 * invoked by the invoke_transport() function
283 		 */
284 		return USB_STOR_TRANSPORT_ERROR;
285 	}
286 
287 	/* we should never get here, but if we do, we're in trouble */
288 	return USB_STOR_TRANSPORT_ERROR;
289 }
290 
rts51x_bulk_transport_special(struct us_data * us,u8 lun,u8 * cmd,int cmd_len,u8 * buf,int buf_len,enum dma_data_direction dir,int * act_len)291 static int rts51x_bulk_transport_special(struct us_data *us, u8 lun,
292 				 u8 *cmd, int cmd_len, u8 *buf, int buf_len,
293 				 enum dma_data_direction dir, int *act_len)
294 {
295 	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
296 	struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf;
297 	int result;
298 	unsigned int cswlen;
299 	unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
300 
301 	/* set up the command wrapper */
302 	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
303 	bcb->DataTransferLength = cpu_to_le32(buf_len);
304 	bcb->Flags = (dir == DMA_FROM_DEVICE) ? US_BULK_FLAG_IN : 0;
305 	bcb->Tag = ++us->tag;
306 	bcb->Lun = lun;
307 	bcb->Length = cmd_len;
308 
309 	/* copy the command payload */
310 	memset(bcb->CDB, 0, sizeof(bcb->CDB));
311 	memcpy(bcb->CDB, cmd, bcb->Length);
312 
313 	/* send it to out endpoint */
314 	result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
315 				bcb, cbwlen, NULL);
316 	if (result != USB_STOR_XFER_GOOD)
317 		return USB_STOR_TRANSPORT_ERROR;
318 
319 	/* DATA STAGE */
320 	/* send/receive data payload, if there is any */
321 
322 	if (buf && buf_len) {
323 		unsigned int pipe = (dir == DMA_FROM_DEVICE) ?
324 				us->recv_bulk_pipe : us->send_bulk_pipe;
325 		result = usb_stor_bulk_transfer_buf(us, pipe,
326 				buf, buf_len, NULL);
327 		if (result == USB_STOR_XFER_ERROR)
328 			return USB_STOR_TRANSPORT_ERROR;
329 	}
330 
331 	/* get CSW for device status */
332 	result = usb_bulk_msg(us->pusb_dev, us->recv_bulk_pipe, bcs,
333 			US_BULK_CS_WRAP_LEN, &cswlen, 250);
334 	return result;
335 }
336 
337 /* Determine what the maximum LUN supported is */
rts51x_get_max_lun(struct us_data * us)338 static int rts51x_get_max_lun(struct us_data *us)
339 {
340 	int result;
341 
342 	/* issue the command */
343 	us->iobuf[0] = 0;
344 	result = usb_stor_control_msg(us, us->recv_ctrl_pipe,
345 				      US_BULK_GET_MAX_LUN,
346 				      USB_DIR_IN | USB_TYPE_CLASS |
347 				      USB_RECIP_INTERFACE,
348 				      0, us->ifnum, us->iobuf, 1, 10 * HZ);
349 
350 	usb_stor_dbg(us, "GetMaxLUN command result is %d, data is %d\n",
351 		     result, us->iobuf[0]);
352 
353 	/* if we have a successful request, return the result */
354 	if (result > 0)
355 		return us->iobuf[0];
356 
357 	return 0;
358 }
359 
rts51x_read_mem(struct us_data * us,u16 addr,u8 * data,u16 len)360 static int rts51x_read_mem(struct us_data *us, u16 addr, u8 *data, u16 len)
361 {
362 	int retval;
363 	u8 cmnd[12] = { 0 };
364 	u8 *buf;
365 
366 	buf = kmalloc(len, GFP_NOIO);
367 	if (buf == NULL)
368 		return USB_STOR_TRANSPORT_ERROR;
369 
370 	usb_stor_dbg(us, "addr = 0x%x, len = %d\n", addr, len);
371 
372 	cmnd[0] = 0xF0;
373 	cmnd[1] = 0x0D;
374 	cmnd[2] = (u8) (addr >> 8);
375 	cmnd[3] = (u8) addr;
376 	cmnd[4] = (u8) (len >> 8);
377 	cmnd[5] = (u8) len;
378 
379 	retval = rts51x_bulk_transport(us, 0, cmnd, 12,
380 				       buf, len, DMA_FROM_DEVICE, NULL);
381 	if (retval != USB_STOR_TRANSPORT_GOOD) {
382 		kfree(buf);
383 		return -EIO;
384 	}
385 
386 	memcpy(data, buf, len);
387 	kfree(buf);
388 	return 0;
389 }
390 
rts51x_write_mem(struct us_data * us,u16 addr,u8 * data,u16 len)391 static int rts51x_write_mem(struct us_data *us, u16 addr, u8 *data, u16 len)
392 {
393 	int retval;
394 	u8 cmnd[12] = { 0 };
395 	u8 *buf;
396 
397 	buf = kmemdup(data, len, GFP_NOIO);
398 	if (buf == NULL)
399 		return USB_STOR_TRANSPORT_ERROR;
400 
401 	usb_stor_dbg(us, "addr = 0x%x, len = %d\n", addr, len);
402 
403 	cmnd[0] = 0xF0;
404 	cmnd[1] = 0x0E;
405 	cmnd[2] = (u8) (addr >> 8);
406 	cmnd[3] = (u8) addr;
407 	cmnd[4] = (u8) (len >> 8);
408 	cmnd[5] = (u8) len;
409 
410 	retval = rts51x_bulk_transport(us, 0, cmnd, 12,
411 				       buf, len, DMA_TO_DEVICE, NULL);
412 	kfree(buf);
413 	if (retval != USB_STOR_TRANSPORT_GOOD)
414 		return -EIO;
415 
416 	return 0;
417 }
418 
rts51x_read_status(struct us_data * us,u8 lun,u8 * status,int len,int * actlen)419 static int rts51x_read_status(struct us_data *us,
420 			      u8 lun, u8 *status, int len, int *actlen)
421 {
422 	int retval;
423 	u8 cmnd[12] = { 0 };
424 	u8 *buf;
425 
426 	buf = kmalloc(len, GFP_NOIO);
427 	if (buf == NULL)
428 		return USB_STOR_TRANSPORT_ERROR;
429 
430 	usb_stor_dbg(us, "lun = %d\n", lun);
431 
432 	cmnd[0] = 0xF0;
433 	cmnd[1] = 0x09;
434 
435 	retval = rts51x_bulk_transport(us, lun, cmnd, 12,
436 				       buf, len, DMA_FROM_DEVICE, actlen);
437 	if (retval != USB_STOR_TRANSPORT_GOOD) {
438 		kfree(buf);
439 		return -EIO;
440 	}
441 
442 	memcpy(status, buf, len);
443 	kfree(buf);
444 	return 0;
445 }
446 
rts51x_check_status(struct us_data * us,u8 lun)447 static int rts51x_check_status(struct us_data *us, u8 lun)
448 {
449 	struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
450 	int retval;
451 	u8 buf[16];
452 
453 	retval = rts51x_read_status(us, lun, buf, 16, &(chip->status_len));
454 	if (retval != STATUS_SUCCESS)
455 		return -EIO;
456 
457 	usb_stor_dbg(us, "chip->status_len = %d\n", chip->status_len);
458 
459 	chip->status[lun].vid = ((u16) buf[0] << 8) | buf[1];
460 	chip->status[lun].pid = ((u16) buf[2] << 8) | buf[3];
461 	chip->status[lun].cur_lun = buf[4];
462 	chip->status[lun].card_type = buf[5];
463 	chip->status[lun].total_lun = buf[6];
464 	chip->status[lun].fw_ver = ((u16) buf[7] << 8) | buf[8];
465 	chip->status[lun].phy_exist = buf[9];
466 	chip->status[lun].multi_flag = buf[10];
467 	chip->status[lun].multi_card = buf[11];
468 	chip->status[lun].log_exist = buf[12];
469 	if (chip->status_len == 16) {
470 		chip->status[lun].detailed_type.detailed_type1 = buf[13];
471 		chip->status[lun].function[0] = buf[14];
472 		chip->status[lun].function[1] = buf[15];
473 	}
474 
475 	return 0;
476 }
477 
enable_oscillator(struct us_data * us)478 static int enable_oscillator(struct us_data *us)
479 {
480 	int retval;
481 	u8 value;
482 
483 	retval = rts51x_read_mem(us, 0xFE77, &value, 1);
484 	if (retval < 0)
485 		return -EIO;
486 
487 	value |= 0x04;
488 	retval = rts51x_write_mem(us, 0xFE77, &value, 1);
489 	if (retval < 0)
490 		return -EIO;
491 
492 	retval = rts51x_read_mem(us, 0xFE77, &value, 1);
493 	if (retval < 0)
494 		return -EIO;
495 
496 	if (!(value & 0x04))
497 		return -EIO;
498 
499 	return 0;
500 }
501 
__do_config_autodelink(struct us_data * us,u8 * data,u16 len)502 static int __do_config_autodelink(struct us_data *us, u8 *data, u16 len)
503 {
504 	int retval;
505 	u8 cmnd[12] = {0};
506 	u8 *buf;
507 
508 	usb_stor_dbg(us, "addr = 0xfe47, len = %d\n", len);
509 
510 	buf = kmemdup(data, len, GFP_NOIO);
511 	if (!buf)
512 		return USB_STOR_TRANSPORT_ERROR;
513 
514 	cmnd[0] = 0xF0;
515 	cmnd[1] = 0x0E;
516 	cmnd[2] = 0xfe;
517 	cmnd[3] = 0x47;
518 	cmnd[4] = (u8)(len >> 8);
519 	cmnd[5] = (u8)len;
520 
521 	retval = rts51x_bulk_transport_special(us, 0, cmnd, 12, buf, len, DMA_TO_DEVICE, NULL);
522 	kfree(buf);
523 	if (retval != USB_STOR_TRANSPORT_GOOD) {
524 		return -EIO;
525 	}
526 
527 	return 0;
528 }
529 
do_config_autodelink(struct us_data * us,int enable,int force)530 static int do_config_autodelink(struct us_data *us, int enable, int force)
531 {
532 	int retval;
533 	u8 value;
534 
535 	retval = rts51x_read_mem(us, 0xFE47, &value, 1);
536 	if (retval < 0)
537 		return -EIO;
538 
539 	if (enable) {
540 		if (force)
541 			value |= 0x03;
542 		else
543 			value |= 0x01;
544 	} else {
545 		value &= ~0x03;
546 	}
547 
548 	usb_stor_dbg(us, "set 0xfe47 to 0x%x\n", value);
549 
550 	/* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
551 	retval = __do_config_autodelink(us, &value, 1);
552 	if (retval < 0)
553 		return -EIO;
554 
555 	return 0;
556 }
557 
config_autodelink_after_power_on(struct us_data * us)558 static int config_autodelink_after_power_on(struct us_data *us)
559 {
560 	struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
561 	int retval;
562 	u8 value;
563 
564 	if (!CHK_AUTO_DELINK(chip))
565 		return 0;
566 
567 	retval = rts51x_read_mem(us, 0xFE47, &value, 1);
568 	if (retval < 0)
569 		return -EIO;
570 
571 	if (auto_delink_en) {
572 		CLR_BIT(value, 0);
573 		CLR_BIT(value, 1);
574 		SET_BIT(value, 2);
575 
576 		if (CHECK_ID(chip, 0x0138, 0x3882))
577 			CLR_BIT(value, 2);
578 
579 		SET_BIT(value, 7);
580 
581 		/* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
582 		retval = __do_config_autodelink(us, &value, 1);
583 		if (retval < 0)
584 			return -EIO;
585 
586 		retval = enable_oscillator(us);
587 		if (retval == 0)
588 			(void)do_config_autodelink(us, 1, 0);
589 	} else {
590 		/* Autodelink controlled by firmware */
591 
592 		SET_BIT(value, 2);
593 
594 		if (CHECK_ID(chip, 0x0138, 0x3882))
595 			CLR_BIT(value, 2);
596 
597 		if (CHECK_ID(chip, 0x0159, 0x5889) ||
598 		    CHECK_ID(chip, 0x0138, 0x3880)) {
599 			CLR_BIT(value, 0);
600 			CLR_BIT(value, 7);
601 		}
602 
603 		/* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
604 		retval = __do_config_autodelink(us, &value, 1);
605 		if (retval < 0)
606 			return -EIO;
607 
608 		if (CHECK_ID(chip, 0x0159, 0x5888)) {
609 			value = 0xFF;
610 			retval = rts51x_write_mem(us, 0xFE79, &value, 1);
611 			if (retval < 0)
612 				return -EIO;
613 
614 			value = 0x01;
615 			retval = rts51x_write_mem(us, 0x48, &value, 1);
616 			if (retval < 0)
617 				return -EIO;
618 		}
619 	}
620 
621 	return 0;
622 }
623 
624 #ifdef CONFIG_PM
config_autodelink_before_power_down(struct us_data * us)625 static int config_autodelink_before_power_down(struct us_data *us)
626 {
627 	struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
628 	int retval;
629 	u8 value;
630 
631 	if (!CHK_AUTO_DELINK(chip))
632 		return 0;
633 
634 	if (auto_delink_en) {
635 		retval = rts51x_read_mem(us, 0xFE77, &value, 1);
636 		if (retval < 0)
637 			return -EIO;
638 
639 		SET_BIT(value, 2);
640 		retval = rts51x_write_mem(us, 0xFE77, &value, 1);
641 		if (retval < 0)
642 			return -EIO;
643 
644 		if (CHECK_ID(chip, 0x0159, 0x5888)) {
645 			value = 0x01;
646 			retval = rts51x_write_mem(us, 0x48, &value, 1);
647 			if (retval < 0)
648 				return -EIO;
649 		}
650 
651 		retval = rts51x_read_mem(us, 0xFE47, &value, 1);
652 		if (retval < 0)
653 			return -EIO;
654 
655 		SET_BIT(value, 0);
656 		if (CHECK_ID(chip, 0x0138, 0x3882))
657 			SET_BIT(value, 2);
658 		retval = rts51x_write_mem(us, 0xFE77, &value, 1);
659 		if (retval < 0)
660 			return -EIO;
661 	} else {
662 		if (CHECK_ID(chip, 0x0159, 0x5889) ||
663 		    CHECK_ID(chip, 0x0138, 0x3880) ||
664 		    CHECK_ID(chip, 0x0138, 0x3882)) {
665 			retval = rts51x_read_mem(us, 0xFE47, &value, 1);
666 			if (retval < 0)
667 				return -EIO;
668 
669 			if (CHECK_ID(chip, 0x0159, 0x5889) ||
670 			    CHECK_ID(chip, 0x0138, 0x3880)) {
671 				SET_BIT(value, 0);
672 				SET_BIT(value, 7);
673 			}
674 
675 			if (CHECK_ID(chip, 0x0138, 0x3882))
676 				SET_BIT(value, 2);
677 
678 			/* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
679 			retval = __do_config_autodelink(us, &value, 1);
680 			if (retval < 0)
681 				return -EIO;
682 		}
683 
684 		if (CHECK_ID(chip, 0x0159, 0x5888)) {
685 			value = 0x01;
686 			retval = rts51x_write_mem(us, 0x48, &value, 1);
687 			if (retval < 0)
688 				return -EIO;
689 		}
690 	}
691 
692 	return 0;
693 }
694 
fw5895_init(struct us_data * us)695 static void fw5895_init(struct us_data *us)
696 {
697 	struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
698 	int retval;
699 	u8 val;
700 
701 	if ((PRODUCT_ID(chip) != 0x0158) || (FW_VERSION(chip) != 0x5895)) {
702 		usb_stor_dbg(us, "Not the specified device, return immediately!\n");
703 	} else {
704 		retval = rts51x_read_mem(us, 0xFD6F, &val, 1);
705 		if (retval == STATUS_SUCCESS && (val & 0x1F) == 0) {
706 			val = 0x1F;
707 			retval = rts51x_write_mem(us, 0xFD70, &val, 1);
708 			if (retval != STATUS_SUCCESS)
709 				usb_stor_dbg(us, "Write memory fail\n");
710 		} else {
711 			usb_stor_dbg(us, "Read memory fail, OR (val & 0x1F) != 0\n");
712 		}
713 	}
714 }
715 #endif
716 
717 #ifdef CONFIG_REALTEK_AUTOPM
fw5895_set_mmc_wp(struct us_data * us)718 static void fw5895_set_mmc_wp(struct us_data *us)
719 {
720 	struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
721 	int retval;
722 	u8 buf[13];
723 
724 	if ((PRODUCT_ID(chip) != 0x0158) || (FW_VERSION(chip) != 0x5895)) {
725 		usb_stor_dbg(us, "Not the specified device, return immediately!\n");
726 	} else {
727 		retval = rts51x_read_mem(us, 0xFD6F, buf, 1);
728 		if (retval == STATUS_SUCCESS && (buf[0] & 0x24) == 0x24) {
729 			/* SD Exist and SD WP */
730 			retval = rts51x_read_mem(us, 0xD04E, buf, 1);
731 			if (retval == STATUS_SUCCESS) {
732 				buf[0] |= 0x04;
733 				retval = rts51x_write_mem(us, 0xFD70, buf, 1);
734 				if (retval != STATUS_SUCCESS)
735 					usb_stor_dbg(us, "Write memory fail\n");
736 			} else {
737 				usb_stor_dbg(us, "Read memory fail\n");
738 			}
739 		} else {
740 			usb_stor_dbg(us, "Read memory fail, OR (buf[0]&0x24)!=0x24\n");
741 		}
742 	}
743 }
744 
rts51x_modi_suspend_timer(struct rts51x_chip * chip)745 static void rts51x_modi_suspend_timer(struct rts51x_chip *chip)
746 {
747 	struct us_data *us = chip->us;
748 
749 	usb_stor_dbg(us, "state:%d\n", rts51x_get_stat(chip));
750 
751 	chip->timer_expires = jiffies + msecs_to_jiffies(1000*ss_delay);
752 	mod_timer(&chip->rts51x_suspend_timer, chip->timer_expires);
753 }
754 
rts51x_suspend_timer_fn(struct timer_list * t)755 static void rts51x_suspend_timer_fn(struct timer_list *t)
756 {
757 	struct rts51x_chip *chip = from_timer(chip, t, rts51x_suspend_timer);
758 	struct us_data *us = chip->us;
759 
760 	switch (rts51x_get_stat(chip)) {
761 	case RTS51X_STAT_INIT:
762 	case RTS51X_STAT_RUN:
763 		rts51x_modi_suspend_timer(chip);
764 		break;
765 	case RTS51X_STAT_IDLE:
766 	case RTS51X_STAT_SS:
767 		usb_stor_dbg(us, "RTS51X_STAT_SS, power.usage:%d\n",
768 			     atomic_read(&us->pusb_intf->dev.power.usage_count));
769 
770 		if (atomic_read(&us->pusb_intf->dev.power.usage_count) > 0) {
771 			usb_stor_dbg(us, "Ready to enter SS state\n");
772 			rts51x_set_stat(chip, RTS51X_STAT_SS);
773 			/* ignore mass storage interface's children */
774 			pm_suspend_ignore_children(&us->pusb_intf->dev, true);
775 			usb_autopm_put_interface_async(us->pusb_intf);
776 			usb_stor_dbg(us, "RTS51X_STAT_SS 01, power.usage:%d\n",
777 				     atomic_read(&us->pusb_intf->dev.power.usage_count));
778 		}
779 		break;
780 	default:
781 		usb_stor_dbg(us, "Unknown state !!!\n");
782 		break;
783 	}
784 }
785 
working_scsi(struct scsi_cmnd * srb)786 static inline int working_scsi(struct scsi_cmnd *srb)
787 {
788 	if ((srb->cmnd[0] == TEST_UNIT_READY) ||
789 	    (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL)) {
790 		return 0;
791 	}
792 
793 	return 1;
794 }
795 
rts51x_invoke_transport(struct scsi_cmnd * srb,struct us_data * us)796 static void rts51x_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
797 {
798 	struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
799 	static int card_first_show = 1;
800 	static u8 media_not_present[] = { 0x70, 0, 0x02, 0, 0, 0, 0,
801 		10, 0, 0, 0, 0, 0x3A, 0, 0, 0, 0, 0
802 	};
803 	static u8 invalid_cmd_field[] = { 0x70, 0, 0x05, 0, 0, 0, 0,
804 		10, 0, 0, 0, 0, 0x24, 0, 0, 0, 0, 0
805 	};
806 	int ret;
807 
808 	if (working_scsi(srb)) {
809 		usb_stor_dbg(us, "working scsi, power.usage:%d\n",
810 			     atomic_read(&us->pusb_intf->dev.power.usage_count));
811 
812 		if (atomic_read(&us->pusb_intf->dev.power.usage_count) <= 0) {
813 			ret = usb_autopm_get_interface(us->pusb_intf);
814 			usb_stor_dbg(us, "working scsi, ret=%d\n", ret);
815 		}
816 		if (rts51x_get_stat(chip) != RTS51X_STAT_RUN)
817 			rts51x_set_stat(chip, RTS51X_STAT_RUN);
818 		chip->proto_handler_backup(srb, us);
819 	} else {
820 		if (rts51x_get_stat(chip) == RTS51X_STAT_SS) {
821 			usb_stor_dbg(us, "NOT working scsi\n");
822 			if ((srb->cmnd[0] == TEST_UNIT_READY) &&
823 			    (chip->pwr_state == US_SUSPEND)) {
824 				if (TST_LUN_READY(chip, srb->device->lun)) {
825 					srb->result = SAM_STAT_GOOD;
826 				} else {
827 					srb->result = SAM_STAT_CHECK_CONDITION;
828 					memcpy(srb->sense_buffer,
829 					       media_not_present,
830 					       US_SENSE_SIZE);
831 				}
832 				usb_stor_dbg(us, "TEST_UNIT_READY\n");
833 				goto out;
834 			}
835 			if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
836 				int prevent = srb->cmnd[4] & 0x1;
837 				if (prevent) {
838 					srb->result = SAM_STAT_CHECK_CONDITION;
839 					memcpy(srb->sense_buffer,
840 					       invalid_cmd_field,
841 					       US_SENSE_SIZE);
842 				} else {
843 					srb->result = SAM_STAT_GOOD;
844 				}
845 				usb_stor_dbg(us, "ALLOW_MEDIUM_REMOVAL\n");
846 				goto out;
847 			}
848 		} else {
849 			usb_stor_dbg(us, "NOT working scsi, not SS\n");
850 			chip->proto_handler_backup(srb, us);
851 			/* Check whether card is plugged in */
852 			if (srb->cmnd[0] == TEST_UNIT_READY) {
853 				if (srb->result == SAM_STAT_GOOD) {
854 					SET_LUN_READY(chip, srb->device->lun);
855 					if (card_first_show) {
856 						card_first_show = 0;
857 						fw5895_set_mmc_wp(us);
858 					}
859 				} else {
860 					CLR_LUN_READY(chip, srb->device->lun);
861 					card_first_show = 1;
862 				}
863 			}
864 			if (rts51x_get_stat(chip) != RTS51X_STAT_IDLE)
865 				rts51x_set_stat(chip, RTS51X_STAT_IDLE);
866 		}
867 	}
868 out:
869 	usb_stor_dbg(us, "state:%d\n", rts51x_get_stat(chip));
870 	if (rts51x_get_stat(chip) == RTS51X_STAT_RUN)
871 		rts51x_modi_suspend_timer(chip);
872 }
873 
realtek_cr_autosuspend_setup(struct us_data * us)874 static int realtek_cr_autosuspend_setup(struct us_data *us)
875 {
876 	struct rts51x_chip *chip;
877 	struct rts51x_status *status = NULL;
878 	u8 buf[16];
879 	int retval;
880 
881 	chip = (struct rts51x_chip *)us->extra;
882 	chip->support_auto_delink = 0;
883 	chip->pwr_state = US_RESUME;
884 	chip->lun_ready = 0;
885 	rts51x_set_stat(chip, RTS51X_STAT_INIT);
886 
887 	retval = rts51x_read_status(us, 0, buf, 16, &(chip->status_len));
888 	if (retval != STATUS_SUCCESS) {
889 		usb_stor_dbg(us, "Read status fail\n");
890 		return -EIO;
891 	}
892 	status = chip->status;
893 	status->vid = ((u16) buf[0] << 8) | buf[1];
894 	status->pid = ((u16) buf[2] << 8) | buf[3];
895 	status->cur_lun = buf[4];
896 	status->card_type = buf[5];
897 	status->total_lun = buf[6];
898 	status->fw_ver = ((u16) buf[7] << 8) | buf[8];
899 	status->phy_exist = buf[9];
900 	status->multi_flag = buf[10];
901 	status->multi_card = buf[11];
902 	status->log_exist = buf[12];
903 	if (chip->status_len == 16) {
904 		status->detailed_type.detailed_type1 = buf[13];
905 		status->function[0] = buf[14];
906 		status->function[1] = buf[15];
907 	}
908 
909 	/* back up the proto_handler in us->extra */
910 	chip = (struct rts51x_chip *)(us->extra);
911 	chip->proto_handler_backup = us->proto_handler;
912 	/* Set the autosuspend_delay to 0 */
913 	pm_runtime_set_autosuspend_delay(&us->pusb_dev->dev, 0);
914 	/* override us->proto_handler setted in get_protocol() */
915 	us->proto_handler = rts51x_invoke_transport;
916 
917 	chip->timer_expires = 0;
918 	timer_setup(&chip->rts51x_suspend_timer, rts51x_suspend_timer_fn, 0);
919 	fw5895_init(us);
920 
921 	/* enable autosuspend function of the usb device */
922 	usb_enable_autosuspend(us->pusb_dev);
923 
924 	return 0;
925 }
926 #endif
927 
realtek_cr_destructor(void * extra)928 static void realtek_cr_destructor(void *extra)
929 {
930 	struct rts51x_chip *chip = extra;
931 
932 	if (!chip)
933 		return;
934 
935 #ifdef CONFIG_REALTEK_AUTOPM
936 	if (ss_en) {
937 		del_timer(&chip->rts51x_suspend_timer);
938 		chip->timer_expires = 0;
939 	}
940 #endif
941 	kfree(chip->status);
942 }
943 
944 #ifdef CONFIG_PM
realtek_cr_suspend(struct usb_interface * iface,pm_message_t message)945 static int realtek_cr_suspend(struct usb_interface *iface, pm_message_t message)
946 {
947 	struct us_data *us = usb_get_intfdata(iface);
948 
949 	/* wait until no command is running */
950 	mutex_lock(&us->dev_mutex);
951 
952 	config_autodelink_before_power_down(us);
953 
954 	mutex_unlock(&us->dev_mutex);
955 
956 	return 0;
957 }
958 
realtek_cr_resume(struct usb_interface * iface)959 static int realtek_cr_resume(struct usb_interface *iface)
960 {
961 	struct us_data *us = usb_get_intfdata(iface);
962 
963 	fw5895_init(us);
964 	config_autodelink_after_power_on(us);
965 
966 	return 0;
967 }
968 #else
969 #define realtek_cr_suspend	NULL
970 #define realtek_cr_resume	NULL
971 #endif
972 
init_realtek_cr(struct us_data * us)973 static int init_realtek_cr(struct us_data *us)
974 {
975 	struct rts51x_chip *chip;
976 	int size, i, retval;
977 
978 	chip = kzalloc(sizeof(struct rts51x_chip), GFP_KERNEL);
979 	if (!chip)
980 		return -ENOMEM;
981 
982 	us->extra = chip;
983 	us->extra_destructor = realtek_cr_destructor;
984 	us->max_lun = chip->max_lun = rts51x_get_max_lun(us);
985 	chip->us = us;
986 
987 	usb_stor_dbg(us, "chip->max_lun = %d\n", chip->max_lun);
988 
989 	size = (chip->max_lun + 1) * sizeof(struct rts51x_status);
990 	chip->status = kzalloc(size, GFP_KERNEL);
991 	if (!chip->status)
992 		goto INIT_FAIL;
993 
994 	for (i = 0; i <= (int)(chip->max_lun); i++) {
995 		retval = rts51x_check_status(us, (u8) i);
996 		if (retval < 0)
997 			goto INIT_FAIL;
998 	}
999 
1000 	if (CHECK_PID(chip, 0x0138) || CHECK_PID(chip, 0x0158) ||
1001 	    CHECK_PID(chip, 0x0159)) {
1002 		if (CHECK_FW_VER(chip, 0x5888) || CHECK_FW_VER(chip, 0x5889) ||
1003 				CHECK_FW_VER(chip, 0x5901))
1004 			SET_AUTO_DELINK(chip);
1005 		if (STATUS_LEN(chip) == 16) {
1006 			if (SUPPORT_AUTO_DELINK(chip))
1007 				SET_AUTO_DELINK(chip);
1008 		}
1009 	}
1010 #ifdef CONFIG_REALTEK_AUTOPM
1011 	if (ss_en)
1012 		realtek_cr_autosuspend_setup(us);
1013 #endif
1014 
1015 	usb_stor_dbg(us, "chip->flag = 0x%x\n", chip->flag);
1016 
1017 	(void)config_autodelink_after_power_on(us);
1018 
1019 	return 0;
1020 
1021 INIT_FAIL:
1022 	if (us->extra) {
1023 		kfree(chip->status);
1024 		kfree(us->extra);
1025 		us->extra = NULL;
1026 	}
1027 
1028 	return -EIO;
1029 }
1030 
1031 static struct scsi_host_template realtek_cr_host_template;
1032 
realtek_cr_probe(struct usb_interface * intf,const struct usb_device_id * id)1033 static int realtek_cr_probe(struct usb_interface *intf,
1034 			    const struct usb_device_id *id)
1035 {
1036 	struct us_data *us;
1037 	int result;
1038 
1039 	dev_dbg(&intf->dev, "Probe Realtek Card Reader!\n");
1040 
1041 	result = usb_stor_probe1(&us, intf, id,
1042 				 (id - realtek_cr_ids) +
1043 				 realtek_cr_unusual_dev_list,
1044 				 &realtek_cr_host_template);
1045 	if (result)
1046 		return result;
1047 
1048 	result = usb_stor_probe2(us);
1049 
1050 	return result;
1051 }
1052 
1053 static struct usb_driver realtek_cr_driver = {
1054 	.name = DRV_NAME,
1055 	.probe = realtek_cr_probe,
1056 	.disconnect = usb_stor_disconnect,
1057 	/* .suspend =      usb_stor_suspend, */
1058 	/* .resume =       usb_stor_resume, */
1059 	.reset_resume = usb_stor_reset_resume,
1060 	.suspend = realtek_cr_suspend,
1061 	.resume = realtek_cr_resume,
1062 	.pre_reset = usb_stor_pre_reset,
1063 	.post_reset = usb_stor_post_reset,
1064 	.id_table = realtek_cr_ids,
1065 	.soft_unbind = 1,
1066 	.supports_autosuspend = 1,
1067 	.no_dynamic_id = 1,
1068 };
1069 
1070 module_usb_stor_driver(realtek_cr_driver, realtek_cr_host_template, DRV_NAME);
1071