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of: property: Make sure child dependencies don't block probing of parent
[linux/fpc-iii.git] / drivers / memstick / host / rtsx_usb_ms.c
blob102dbb8080da5c71f99672dcaee6119f7fc3afcc
1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Realtek USB Memstick Card Interface driver
3 *
4 * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
5 *
6 * Author:
7 * Roger Tseng <rogerable@realtek.com>
8 */
9
10 #include <linux/module.h>
11 #include <linux/highmem.h>
12 #include <linux/delay.h>
13 #include <linux/platform_device.h>
14 #include <linux/workqueue.h>
15 #include <linux/memstick.h>
16 #include <linux/kthread.h>
17 #include <linux/rtsx_usb.h>
18 #include <linux/pm_runtime.h>
19 #include <linux/mutex.h>
20 #include <linux/sched.h>
21 #include <linux/completion.h>
22 #include <asm/unaligned.h>
23
24 struct rtsx_usb_ms {
25 struct platform_device *pdev;
26 struct rtsx_ucr *ucr;
27 struct memstick_host *msh;
28 struct memstick_request *req;
29
30 struct mutex host_mutex;
31 struct work_struct handle_req;
32 struct delayed_work poll_card;
33
34 u8 ssc_depth;
35 unsigned int clock;
36 int power_mode;
37 unsigned char ifmode;
38 bool eject;
39 bool system_suspending;
40 };
41
42 static inline struct device *ms_dev(struct rtsx_usb_ms *host)
43 {
44 return &(host->pdev->dev);
45 }
46
47 static inline void ms_clear_error(struct rtsx_usb_ms *host)
48 {
49 struct rtsx_ucr *ucr = host->ucr;
50 rtsx_usb_ep0_write_register(ucr, CARD_STOP,
51 MS_STOP | MS_CLR_ERR,
52 MS_STOP | MS_CLR_ERR);
53
54 rtsx_usb_clear_dma_err(ucr);
55 rtsx_usb_clear_fsm_err(ucr);
56 }
57
58 #ifdef DEBUG
59
60 static void ms_print_debug_regs(struct rtsx_usb_ms *host)
61 {
62 struct rtsx_ucr *ucr = host->ucr;
63 u16 i;
64 u8 *ptr;
65
66 /* Print MS host internal registers */
67 rtsx_usb_init_cmd(ucr);
68
69 /* MS_CFG to MS_INT_REG */
70 for (i = 0xFD40; i <= 0xFD44; i++)
71 rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
72
73 /* CARD_SHARE_MODE to CARD_GPIO */
74 for (i = 0xFD51; i <= 0xFD56; i++)
75 rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
76
77 /* CARD_PULL_CTLx */
78 for (i = 0xFD60; i <= 0xFD65; i++)
79 rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
80
81 /* CARD_DATA_SOURCE, CARD_SELECT, CARD_CLK_EN, CARD_PWR_CTL */
82 rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_DATA_SOURCE, 0, 0);
83 rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_SELECT, 0, 0);
84 rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_CLK_EN, 0, 0);
85 rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_PWR_CTL, 0, 0);
86
87 rtsx_usb_send_cmd(ucr, MODE_CR, 100);
88 rtsx_usb_get_rsp(ucr, 21, 100);
89
90 ptr = ucr->rsp_buf;
91 for (i = 0xFD40; i <= 0xFD44; i++)
92 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
93 for (i = 0xFD51; i <= 0xFD56; i++)
94 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
95 for (i = 0xFD60; i <= 0xFD65; i++)
96 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
97
98 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_DATA_SOURCE, *(ptr++));
99 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_SELECT, *(ptr++));
100 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_CLK_EN, *(ptr++));
101 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_PWR_CTL, *(ptr++));
102 }
103
104 #else
105
106 static void ms_print_debug_regs(struct rtsx_usb_ms *host)
107 {
108 }
109
110 #endif
111
112 static int ms_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr)
113 {
114 rtsx_usb_init_cmd(ucr);
115
116 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
117 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
118 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
119 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
120 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
121 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
122
123 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
124 }
125
126 static int ms_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr)
127 {
128 rtsx_usb_init_cmd(ucr);
129
130 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
131 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
132 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
133 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
134 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56);
135 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
136
137 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
138 }
139
140 static int ms_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr)
141 {
142 rtsx_usb_init_cmd(ucr);
143
144 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
145 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
146 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
147 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
148 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
149 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
150
151 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
152 }
153
154 static int ms_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr)
155 {
156 rtsx_usb_init_cmd(ucr);
157
158 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
159 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
160 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
161 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
162 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
163 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
164
165 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
166 }
167
168 static int ms_power_on(struct rtsx_usb_ms *host)
169 {
170 struct rtsx_ucr *ucr = host->ucr;
171 int err;
172
173 dev_dbg(ms_dev(host), "%s\n", __func__);
174
175 rtsx_usb_init_cmd(ucr);
176 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, MS_MOD_SEL);
177 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE,
178 CARD_SHARE_MASK, CARD_SHARE_MS);
179 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN,
180 MS_CLK_EN, MS_CLK_EN);
181 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
182 if (err < 0)
183 return err;
184
185 if (CHECK_PKG(ucr, LQFP48))
186 err = ms_pull_ctl_enable_lqfp48(ucr);
187 else
188 err = ms_pull_ctl_enable_qfn24(ucr);
189 if (err < 0)
190 return err;
191
192 err = rtsx_usb_write_register(ucr, CARD_PWR_CTL,
193 POWER_MASK, PARTIAL_POWER_ON);
194 if (err)
195 return err;
196
197 usleep_range(800, 1000);
198
199 rtsx_usb_init_cmd(ucr);
200 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
201 POWER_MASK, POWER_ON);
202 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE,
203 MS_OUTPUT_EN, MS_OUTPUT_EN);
204
205 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
206 }
207
208 static int ms_power_off(struct rtsx_usb_ms *host)
209 {
210 struct rtsx_ucr *ucr = host->ucr;
211 int err;
212
213 dev_dbg(ms_dev(host), "%s\n", __func__);
214
215 rtsx_usb_init_cmd(ucr);
216
217 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, MS_CLK_EN, 0);
218 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, MS_OUTPUT_EN, 0);
219
220 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
221 if (err < 0)
222 return err;
223
224 if (CHECK_PKG(ucr, LQFP48))
225 return ms_pull_ctl_disable_lqfp48(ucr);
226
227 return ms_pull_ctl_disable_qfn24(ucr);
228 }
229
230 static int ms_transfer_data(struct rtsx_usb_ms *host, unsigned char data_dir,
231 u8 tpc, u8 cfg, struct scatterlist *sg)
232 {
233 struct rtsx_ucr *ucr = host->ucr;
234 int err;
235 unsigned int length = sg->length;
236 u16 sec_cnt = (u16)(length / 512);
237 u8 trans_mode, dma_dir, flag;
238 unsigned int pipe;
239 struct memstick_dev *card = host->msh->card;
240
241 dev_dbg(ms_dev(host), "%s: tpc = 0x%02x, data_dir = %s, length = %d\n",
242 __func__, tpc, (data_dir == READ) ? "READ" : "WRITE",
243 length);
244
245 if (data_dir == READ) {
246 flag = MODE_CDIR;
247 dma_dir = DMA_DIR_FROM_CARD;
248 if (card->id.type != MEMSTICK_TYPE_PRO)
249 trans_mode = MS_TM_NORMAL_READ;
250 else
251 trans_mode = MS_TM_AUTO_READ;
252 pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN);
253 } else {
254 flag = MODE_CDOR;
255 dma_dir = DMA_DIR_TO_CARD;
256 if (card->id.type != MEMSTICK_TYPE_PRO)
257 trans_mode = MS_TM_NORMAL_WRITE;
258 else
259 trans_mode = MS_TM_AUTO_WRITE;
260 pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT);
261 }
262
263 rtsx_usb_init_cmd(ucr);
264
265 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
266 if (card->id.type == MEMSTICK_TYPE_PRO) {
267 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_SECTOR_CNT_H,
268 0xFF, (u8)(sec_cnt >> 8));
269 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_SECTOR_CNT_L,
270 0xFF, (u8)sec_cnt);
271 }
272 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
273
274 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3,
275 0xFF, (u8)(length >> 24));
276 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2,
277 0xFF, (u8)(length >> 16));
278 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1,
279 0xFF, (u8)(length >> 8));
280 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0, 0xFF,
281 (u8)length);
282 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
283 0x03 | DMA_PACK_SIZE_MASK, dma_dir | DMA_EN | DMA_512);
284 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
285 0x01, RING_BUFFER);
286
287 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER,
288 0xFF, MS_TRANSFER_START | trans_mode);
289 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER,
290 MS_TRANSFER_END, MS_TRANSFER_END);
291
292 err = rtsx_usb_send_cmd(ucr, flag | STAGE_MS_STATUS, 100);
293 if (err)
294 return err;
295
296 err = rtsx_usb_transfer_data(ucr, pipe, sg, length,
297 1, NULL, 10000);
298 if (err)
299 goto err_out;
300
301 err = rtsx_usb_get_rsp(ucr, 3, 15000);
302 if (err)
303 goto err_out;
304
305 if (ucr->rsp_buf[0] & MS_TRANSFER_ERR ||
306 ucr->rsp_buf[1] & (MS_CRC16_ERR | MS_RDY_TIMEOUT)) {
307 err = -EIO;
308 goto err_out;
309 }
310 return 0;
311 err_out:
312 ms_clear_error(host);
313 return err;
314 }
315
316 static int ms_write_bytes(struct rtsx_usb_ms *host, u8 tpc,
317 u8 cfg, u8 cnt, u8 *data, u8 *int_reg)
318 {
319 struct rtsx_ucr *ucr = host->ucr;
320 int err, i;
321
322 dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc);
323
324 rtsx_usb_init_cmd(ucr);
325
326 for (i = 0; i < cnt; i++)
327 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
328 PPBUF_BASE2 + i, 0xFF, data[i]);
329
330 if (cnt % 2)
331 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
332 PPBUF_BASE2 + i, 0xFF, 0xFF);
333
334 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
335 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt);
336 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
337 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
338 0x01, PINGPONG_BUFFER);
339
340 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER,
341 0xFF, MS_TRANSFER_START | MS_TM_WRITE_BYTES);
342 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER,
343 MS_TRANSFER_END, MS_TRANSFER_END);
344 rtsx_usb_add_cmd(ucr, READ_REG_CMD, MS_TRANS_CFG, 0, 0);
345
346 err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
347 if (err)
348 return err;
349
350 err = rtsx_usb_get_rsp(ucr, 2, 5000);
351 if (err || (ucr->rsp_buf[0] & MS_TRANSFER_ERR)) {
352 u8 val;
353
354 rtsx_usb_ep0_read_register(ucr, MS_TRANS_CFG, &val);
355 dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val);
356
357 if (int_reg)
358 *int_reg = val & 0x0F;
359
360 ms_print_debug_regs(host);
361
362 ms_clear_error(host);
363
364 if (!(tpc & 0x08)) {
365 if (val & MS_CRC16_ERR)
366 return -EIO;
367 } else {
368 if (!(val & 0x80)) {
369 if (val & (MS_INT_ERR | MS_INT_CMDNK))
370 return -EIO;
371 }
372 }
373
374 return -ETIMEDOUT;
375 }
376
377 if (int_reg)
378 *int_reg = ucr->rsp_buf[1] & 0x0F;
379
380 return 0;
381 }
382
383 static int ms_read_bytes(struct rtsx_usb_ms *host, u8 tpc,
384 u8 cfg, u8 cnt, u8 *data, u8 *int_reg)
385 {
386 struct rtsx_ucr *ucr = host->ucr;
387 int err, i;
388 u8 *ptr;
389
390 dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc);
391
392 rtsx_usb_init_cmd(ucr);
393
394 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
395 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt);
396 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
397 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
398 0x01, PINGPONG_BUFFER);
399
400 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER,
401 0xFF, MS_TRANSFER_START | MS_TM_READ_BYTES);
402 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER,
403 MS_TRANSFER_END, MS_TRANSFER_END);
404 for (i = 0; i < cnt - 1; i++)
405 rtsx_usb_add_cmd(ucr, READ_REG_CMD, PPBUF_BASE2 + i, 0, 0);
406 if (cnt % 2)
407 rtsx_usb_add_cmd(ucr, READ_REG_CMD, PPBUF_BASE2 + cnt, 0, 0);
408 else
409 rtsx_usb_add_cmd(ucr, READ_REG_CMD,
410 PPBUF_BASE2 + cnt - 1, 0, 0);
411
412 rtsx_usb_add_cmd(ucr, READ_REG_CMD, MS_TRANS_CFG, 0, 0);
413
414 err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
415 if (err)
416 return err;
417
418 err = rtsx_usb_get_rsp(ucr, cnt + 2, 5000);
419 if (err || (ucr->rsp_buf[0] & MS_TRANSFER_ERR)) {
420 u8 val;
421
422 rtsx_usb_ep0_read_register(ucr, MS_TRANS_CFG, &val);
423 dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val);
424
425 if (int_reg && (host->ifmode != MEMSTICK_SERIAL))
426 *int_reg = val & 0x0F;
427
428 ms_print_debug_regs(host);
429
430 ms_clear_error(host);
431
432 if (!(tpc & 0x08)) {
433 if (val & MS_CRC16_ERR)
434 return -EIO;
435 } else {
436 if (!(val & 0x80)) {
437 if (val & (MS_INT_ERR | MS_INT_CMDNK))
438 return -EIO;
439 }
440 }
441
442 return -ETIMEDOUT;
443 }
444
445 ptr = ucr->rsp_buf + 1;
446 for (i = 0; i < cnt; i++)
447 data[i] = *ptr++;
448
449
450 if (int_reg && (host->ifmode != MEMSTICK_SERIAL))
451 *int_reg = *ptr & 0x0F;
452
453 return 0;
454 }
455
456 static int rtsx_usb_ms_issue_cmd(struct rtsx_usb_ms *host)
457 {
458 struct memstick_request *req = host->req;
459 int err = 0;
460 u8 cfg = 0, int_reg;
461
462 dev_dbg(ms_dev(host), "%s\n", __func__);
463
464 if (req->need_card_int) {
465 if (host->ifmode != MEMSTICK_SERIAL)
466 cfg = WAIT_INT;
467 }
468
469 if (req->long_data) {
470 err = ms_transfer_data(host, req->data_dir,
471 req->tpc, cfg, &(req->sg));
472 } else {
473 if (req->data_dir == READ)
474 err = ms_read_bytes(host, req->tpc, cfg,
475 req->data_len, req->data, &int_reg);
476 else
477 err = ms_write_bytes(host, req->tpc, cfg,
478 req->data_len, req->data, &int_reg);
479 }
480 if (err < 0)
481 return err;
482
483 if (req->need_card_int) {
484 if (host->ifmode == MEMSTICK_SERIAL) {
485 err = ms_read_bytes(host, MS_TPC_GET_INT,
486 NO_WAIT_INT, 1, &req->int_reg, NULL);
487 if (err < 0)
488 return err;
489 } else {
490
491 if (int_reg & MS_INT_CMDNK)
492 req->int_reg |= MEMSTICK_INT_CMDNAK;
493 if (int_reg & MS_INT_BREQ)
494 req->int_reg |= MEMSTICK_INT_BREQ;
495 if (int_reg & MS_INT_ERR)
496 req->int_reg |= MEMSTICK_INT_ERR;
497 if (int_reg & MS_INT_CED)
498 req->int_reg |= MEMSTICK_INT_CED;
499 }
500 dev_dbg(ms_dev(host), "int_reg: 0x%02x\n", req->int_reg);
501 }
502
503 return 0;
504 }
505
506 static void rtsx_usb_ms_handle_req(struct work_struct *work)
507 {
508 struct rtsx_usb_ms *host = container_of(work,
509 struct rtsx_usb_ms, handle_req);
510 struct rtsx_ucr *ucr = host->ucr;
511 struct memstick_host *msh = host->msh;
512 int rc;
513
514 if (!host->req) {
515 pm_runtime_get_sync(ms_dev(host));
516 do {
517 rc = memstick_next_req(msh, &host->req);
518 dev_dbg(ms_dev(host), "next req %d\n", rc);
519
520 if (!rc) {
521 mutex_lock(&ucr->dev_mutex);
522
523 if (rtsx_usb_card_exclusive_check(ucr,
524 RTSX_USB_MS_CARD))
525 host->req->error = -EIO;
526 else
527 host->req->error =
528 rtsx_usb_ms_issue_cmd(host);
529
530 mutex_unlock(&ucr->dev_mutex);
531
532 dev_dbg(ms_dev(host), "req result %d\n",
533 host->req->error);
534 }
535 } while (!rc);
536 pm_runtime_put_sync(ms_dev(host));
537 }
538
539 }
540
541 static void rtsx_usb_ms_request(struct memstick_host *msh)
542 {
543 struct rtsx_usb_ms *host = memstick_priv(msh);
544
545 dev_dbg(ms_dev(host), "--> %s\n", __func__);
546
547 if (!host->eject)
548 schedule_work(&host->handle_req);
549 }
550
551 static int rtsx_usb_ms_set_param(struct memstick_host *msh,
552 enum memstick_param param, int value)
553 {
554 struct rtsx_usb_ms *host = memstick_priv(msh);
555 struct rtsx_ucr *ucr = host->ucr;
556 unsigned int clock = 0;
557 u8 ssc_depth = 0;
558 int err;
559
560 dev_dbg(ms_dev(host), "%s: param = %d, value = %d\n",
561 __func__, param, value);
562
563 pm_runtime_get_sync(ms_dev(host));
564 mutex_lock(&ucr->dev_mutex);
565
566 err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_MS_CARD);
567 if (err)
568 goto out;
569
570 switch (param) {
571 case MEMSTICK_POWER:
572 if (value == host->power_mode)
573 break;
574
575 if (value == MEMSTICK_POWER_ON) {
576 pm_runtime_get_noresume(ms_dev(host));
577 err = ms_power_on(host);
578 if (err)
579 pm_runtime_put_noidle(ms_dev(host));
580 } else if (value == MEMSTICK_POWER_OFF) {
581 err = ms_power_off(host);
582 if (!err)
583 pm_runtime_put_noidle(ms_dev(host));
584 } else
585 err = -EINVAL;
586 if (!err)
587 host->power_mode = value;
588 break;
589
590 case MEMSTICK_INTERFACE:
591 if (value == MEMSTICK_SERIAL) {
592 clock = 19000000;
593 ssc_depth = SSC_DEPTH_512K;
594 err = rtsx_usb_write_register(ucr, MS_CFG, 0x5A,
595 MS_BUS_WIDTH_1 | PUSH_TIME_DEFAULT);
596 if (err < 0)
597 break;
598 } else if (value == MEMSTICK_PAR4) {
599 clock = 39000000;
600 ssc_depth = SSC_DEPTH_1M;
601
602 err = rtsx_usb_write_register(ucr, MS_CFG, 0x5A,
603 MS_BUS_WIDTH_4 | PUSH_TIME_ODD |
604 MS_NO_CHECK_INT);
605 if (err < 0)
606 break;
607 } else {
608 err = -EINVAL;
609 break;
610 }
611
612 err = rtsx_usb_switch_clock(ucr, clock,
613 ssc_depth, false, true, false);
614 if (err < 0) {
615 dev_dbg(ms_dev(host), "switch clock failed\n");
616 break;
617 }
618
619 host->ssc_depth = ssc_depth;
620 host->clock = clock;
621 host->ifmode = value;
622 break;
623 default:
624 err = -EINVAL;
625 break;
626 }
627 out:
628 mutex_unlock(&ucr->dev_mutex);
629 pm_runtime_put_sync(ms_dev(host));
630
631 /* power-on delay */
632 if (param == MEMSTICK_POWER && value == MEMSTICK_POWER_ON) {
633 usleep_range(10000, 12000);
634
635 if (!host->eject)
636 schedule_delayed_work(&host->poll_card, 100);
637 }
638
639 dev_dbg(ms_dev(host), "%s: return = %d\n", __func__, err);
640 return err;
641 }
642
643 #ifdef CONFIG_PM_SLEEP
644 static int rtsx_usb_ms_suspend(struct device *dev)
645 {
646 struct rtsx_usb_ms *host = dev_get_drvdata(dev);
647 struct memstick_host *msh = host->msh;
648
649 /* Since we use rtsx_usb's resume callback to runtime resume its
650 * children to implement remote wakeup signaling, this causes
651 * rtsx_usb_ms' runtime resume callback runs after its suspend
652 * callback:
653 * rtsx_usb_ms_suspend()
654 * rtsx_usb_resume()
655 * -> rtsx_usb_ms_runtime_resume()
656 * -> memstick_detect_change()
657 *
658 * rtsx_usb_suspend()
659 *
660 * To avoid this, skip runtime resume/suspend if system suspend is
661 * underway.
662 */
663
664 host->system_suspending = true;
665 memstick_suspend_host(msh);
666
667 return 0;
668 }
669
670 static int rtsx_usb_ms_resume(struct device *dev)
671 {
672 struct rtsx_usb_ms *host = dev_get_drvdata(dev);
673 struct memstick_host *msh = host->msh;
674
675 memstick_resume_host(msh);
676 host->system_suspending = false;
677
678 return 0;
679 }
680 #endif /* CONFIG_PM_SLEEP */
681
682 #ifdef CONFIG_PM
683 static int rtsx_usb_ms_runtime_suspend(struct device *dev)
684 {
685 struct rtsx_usb_ms *host = dev_get_drvdata(dev);
686
687 if (host->system_suspending)
688 return 0;
689
690 if (host->msh->card || host->power_mode != MEMSTICK_POWER_OFF)
691 return -EAGAIN;
692
693 return 0;
694 }
695
696 static int rtsx_usb_ms_runtime_resume(struct device *dev)
697 {
698 struct rtsx_usb_ms *host = dev_get_drvdata(dev);
699
700
701 if (host->system_suspending)
702 return 0;
703
704 memstick_detect_change(host->msh);
705
706 return 0;
707 }
708 #endif /* CONFIG_PM */
709
710 static const struct dev_pm_ops rtsx_usb_ms_pm_ops = {
711 SET_SYSTEM_SLEEP_PM_OPS(rtsx_usb_ms_suspend, rtsx_usb_ms_resume)
712 SET_RUNTIME_PM_OPS(rtsx_usb_ms_runtime_suspend, rtsx_usb_ms_runtime_resume, NULL)
713 };
714
715
716 static void rtsx_usb_ms_poll_card(struct work_struct *work)
717 {
718 struct rtsx_usb_ms *host = container_of(work, struct rtsx_usb_ms,
719 poll_card.work);
720 struct rtsx_ucr *ucr = host->ucr;
721 int err;
722 u8 val;
723
724 if (host->eject || host->power_mode != MEMSTICK_POWER_ON)
725 return;
726
727 pm_runtime_get_sync(ms_dev(host));
728 mutex_lock(&ucr->dev_mutex);
729
730 /* Check pending MS card changes */
731 err = rtsx_usb_read_register(ucr, CARD_INT_PEND, &val);
732 if (err) {
733 mutex_unlock(&ucr->dev_mutex);
734 goto poll_again;
735 }
736
737 /* Clear the pending */
738 rtsx_usb_write_register(ucr, CARD_INT_PEND,
739 XD_INT | MS_INT | SD_INT,
740 XD_INT | MS_INT | SD_INT);
741
742 mutex_unlock(&ucr->dev_mutex);
743
744 if (val & MS_INT) {
745 dev_dbg(ms_dev(host), "MS slot change detected\n");
746 memstick_detect_change(host->msh);
747 }
748
749 poll_again:
750 pm_runtime_put_sync(ms_dev(host));
751
752 if (!host->eject && host->power_mode == MEMSTICK_POWER_ON)
753 schedule_delayed_work(&host->poll_card, 100);
754 }
755
756 static int rtsx_usb_ms_drv_probe(struct platform_device *pdev)
757 {
758 struct memstick_host *msh;
759 struct rtsx_usb_ms *host;
760 struct rtsx_ucr *ucr;
761 int err;
762
763 ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent));
764 if (!ucr)
765 return -ENXIO;
766
767 dev_dbg(&(pdev->dev),
768 "Realtek USB Memstick controller found\n");
769
770 msh = memstick_alloc_host(sizeof(*host), &pdev->dev);
771 if (!msh)
772 return -ENOMEM;
773
774 host = memstick_priv(msh);
775 host->ucr = ucr;
776 host->msh = msh;
777 host->pdev = pdev;
778 host->power_mode = MEMSTICK_POWER_OFF;
779 platform_set_drvdata(pdev, host);
780
781 mutex_init(&host->host_mutex);
782 INIT_WORK(&host->handle_req, rtsx_usb_ms_handle_req);
783
784 INIT_DELAYED_WORK(&host->poll_card, rtsx_usb_ms_poll_card);
785
786 msh->request = rtsx_usb_ms_request;
787 msh->set_param = rtsx_usb_ms_set_param;
788 msh->caps = MEMSTICK_CAP_PAR4;
789
790 pm_runtime_get_noresume(ms_dev(host));
791 pm_runtime_set_active(ms_dev(host));
792 pm_runtime_enable(ms_dev(host));
793
794 err = memstick_add_host(msh);
795 if (err)
796 goto err_out;
797
798 pm_runtime_put(ms_dev(host));
799
800 return 0;
801 err_out:
802 memstick_free_host(msh);
803 pm_runtime_disable(ms_dev(host));
804 pm_runtime_put_noidle(ms_dev(host));
805 return err;
806 }
807
808 static int rtsx_usb_ms_drv_remove(struct platform_device *pdev)
809 {
810 struct rtsx_usb_ms *host = platform_get_drvdata(pdev);
811 struct memstick_host *msh = host->msh;
812 int err;
813
814 host->eject = true;
815 cancel_work_sync(&host->handle_req);
816
817 mutex_lock(&host->host_mutex);
818 if (host->req) {
819 dev_dbg(ms_dev(host),
820 "%s: Controller removed during transfer\n",
821 dev_name(&msh->dev));
822 host->req->error = -ENOMEDIUM;
823 do {
824 err = memstick_next_req(msh, &host->req);
825 if (!err)
826 host->req->error = -ENOMEDIUM;
827 } while (!err);
828 }
829 mutex_unlock(&host->host_mutex);
830
831 memstick_remove_host(msh);
832 memstick_free_host(msh);
833
834 /* Balance possible unbalanced usage count
835 * e.g. unconditional module removal
836 */
837 if (pm_runtime_active(ms_dev(host)))
838 pm_runtime_put(ms_dev(host));
839
840 pm_runtime_disable(ms_dev(host));
841 platform_set_drvdata(pdev, NULL);
842
843 dev_dbg(ms_dev(host),
844 ": Realtek USB Memstick controller has been removed\n");
845
846 return 0;
847 }
848
849 static struct platform_device_id rtsx_usb_ms_ids[] = {
850 {
851 .name = "rtsx_usb_ms",
852 }, {
853 /* sentinel */
854 }
855 };
856 MODULE_DEVICE_TABLE(platform, rtsx_usb_ms_ids);
857
858 static struct platform_driver rtsx_usb_ms_driver = {
859 .probe = rtsx_usb_ms_drv_probe,
860 .remove = rtsx_usb_ms_drv_remove,
861 .id_table = rtsx_usb_ms_ids,
862 .driver = {
863 .name = "rtsx_usb_ms",
864 .pm = &rtsx_usb_ms_pm_ops,
865 },
866 };
867 module_platform_driver(rtsx_usb_ms_driver);
868
869 MODULE_LICENSE("GPL v2");
870 MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>");
871 MODULE_DESCRIPTION("Realtek USB Memstick Card Host Driver");
Linux with added FPC-III support