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include/linux/sched/mm.h: re-inline mmdrop()
[linux/fpc-iii.git] / drivers / memstick / host / rtsx_usb_ms.c
blob4f64563df7ded29f387cc0b32d2e147eb27e6848
1 /* Realtek USB Memstick Card Interface driver
2 *
3 * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, see <http://www.gnu.org/licenses/>.
16 *
17 * Author:
18 * Roger Tseng <rogerable@realtek.com>
19 */
20
21 #include <linux/module.h>
22 #include <linux/highmem.h>
23 #include <linux/delay.h>
24 #include <linux/platform_device.h>
25 #include <linux/workqueue.h>
26 #include <linux/memstick.h>
27 #include <linux/kthread.h>
28 #include <linux/rtsx_usb.h>
29 #include <linux/pm_runtime.h>
30 #include <linux/mutex.h>
31 #include <linux/sched.h>
32 #include <linux/completion.h>
33 #include <asm/unaligned.h>
34
35 struct rtsx_usb_ms {
36 struct platform_device *pdev;
37 struct rtsx_ucr *ucr;
38 struct memstick_host *msh;
39 struct memstick_request *req;
40
41 struct mutex host_mutex;
42 struct work_struct handle_req;
43
44 struct task_struct *detect_ms;
45 struct completion detect_ms_exit;
46
47 u8 ssc_depth;
48 unsigned int clock;
49 int power_mode;
50 unsigned char ifmode;
51 bool eject;
52 };
53
54 static inline struct device *ms_dev(struct rtsx_usb_ms *host)
55 {
56 return &(host->pdev->dev);
57 }
58
59 static inline void ms_clear_error(struct rtsx_usb_ms *host)
60 {
61 struct rtsx_ucr *ucr = host->ucr;
62 rtsx_usb_ep0_write_register(ucr, CARD_STOP,
63 MS_STOP | MS_CLR_ERR,
64 MS_STOP | MS_CLR_ERR);
65
66 rtsx_usb_clear_dma_err(ucr);
67 rtsx_usb_clear_fsm_err(ucr);
68 }
69
70 #ifdef DEBUG
71
72 static void ms_print_debug_regs(struct rtsx_usb_ms *host)
73 {
74 struct rtsx_ucr *ucr = host->ucr;
75 u16 i;
76 u8 *ptr;
77
78 /* Print MS host internal registers */
79 rtsx_usb_init_cmd(ucr);
80
81 /* MS_CFG to MS_INT_REG */
82 for (i = 0xFD40; i <= 0xFD44; i++)
83 rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
84
85 /* CARD_SHARE_MODE to CARD_GPIO */
86 for (i = 0xFD51; i <= 0xFD56; i++)
87 rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
88
89 /* CARD_PULL_CTLx */
90 for (i = 0xFD60; i <= 0xFD65; i++)
91 rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
92
93 /* CARD_DATA_SOURCE, CARD_SELECT, CARD_CLK_EN, CARD_PWR_CTL */
94 rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_DATA_SOURCE, 0, 0);
95 rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_SELECT, 0, 0);
96 rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_CLK_EN, 0, 0);
97 rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_PWR_CTL, 0, 0);
98
99 rtsx_usb_send_cmd(ucr, MODE_CR, 100);
100 rtsx_usb_get_rsp(ucr, 21, 100);
101
102 ptr = ucr->rsp_buf;
103 for (i = 0xFD40; i <= 0xFD44; i++)
104 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
105 for (i = 0xFD51; i <= 0xFD56; i++)
106 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
107 for (i = 0xFD60; i <= 0xFD65; i++)
108 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
109
110 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_DATA_SOURCE, *(ptr++));
111 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_SELECT, *(ptr++));
112 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_CLK_EN, *(ptr++));
113 dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_PWR_CTL, *(ptr++));
114 }
115
116 #else
117
118 static void ms_print_debug_regs(struct rtsx_usb_ms *host)
119 {
120 }
121
122 #endif
123
124 static int ms_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr)
125 {
126 rtsx_usb_init_cmd(ucr);
127
128 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
129 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
130 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
131 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
132 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
133 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
134
135 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
136 }
137
138 static int ms_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr)
139 {
140 rtsx_usb_init_cmd(ucr);
141
142 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
143 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
144 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
145 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
146 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56);
147 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
148
149 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
150 }
151
152 static int ms_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr)
153 {
154 rtsx_usb_init_cmd(ucr);
155
156 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
157 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
158 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
159 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
160 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
161 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
162
163 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
164 }
165
166 static int ms_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr)
167 {
168 rtsx_usb_init_cmd(ucr);
169
170 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
171 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
172 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
173 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
174 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
175 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
176
177 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
178 }
179
180 static int ms_power_on(struct rtsx_usb_ms *host)
181 {
182 struct rtsx_ucr *ucr = host->ucr;
183 int err;
184
185 dev_dbg(ms_dev(host), "%s\n", __func__);
186
187 rtsx_usb_init_cmd(ucr);
188 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, MS_MOD_SEL);
189 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE,
190 CARD_SHARE_MASK, CARD_SHARE_MS);
191 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN,
192 MS_CLK_EN, MS_CLK_EN);
193 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
194 if (err < 0)
195 return err;
196
197 if (CHECK_PKG(ucr, LQFP48))
198 err = ms_pull_ctl_enable_lqfp48(ucr);
199 else
200 err = ms_pull_ctl_enable_qfn24(ucr);
201 if (err < 0)
202 return err;
203
204 err = rtsx_usb_write_register(ucr, CARD_PWR_CTL,
205 POWER_MASK, PARTIAL_POWER_ON);
206 if (err)
207 return err;
208
209 usleep_range(800, 1000);
210
211 rtsx_usb_init_cmd(ucr);
212 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
213 POWER_MASK, POWER_ON);
214 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE,
215 MS_OUTPUT_EN, MS_OUTPUT_EN);
216
217 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
218 }
219
220 static int ms_power_off(struct rtsx_usb_ms *host)
221 {
222 struct rtsx_ucr *ucr = host->ucr;
223 int err;
224
225 dev_dbg(ms_dev(host), "%s\n", __func__);
226
227 rtsx_usb_init_cmd(ucr);
228
229 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, MS_CLK_EN, 0);
230 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, MS_OUTPUT_EN, 0);
231
232 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
233 if (err < 0)
234 return err;
235
236 if (CHECK_PKG(ucr, LQFP48))
237 return ms_pull_ctl_disable_lqfp48(ucr);
238
239 return ms_pull_ctl_disable_qfn24(ucr);
240 }
241
242 static int ms_transfer_data(struct rtsx_usb_ms *host, unsigned char data_dir,
243 u8 tpc, u8 cfg, struct scatterlist *sg)
244 {
245 struct rtsx_ucr *ucr = host->ucr;
246 int err;
247 unsigned int length = sg->length;
248 u16 sec_cnt = (u16)(length / 512);
249 u8 trans_mode, dma_dir, flag;
250 unsigned int pipe;
251 struct memstick_dev *card = host->msh->card;
252
253 dev_dbg(ms_dev(host), "%s: tpc = 0x%02x, data_dir = %s, length = %d\n",
254 __func__, tpc, (data_dir == READ) ? "READ" : "WRITE",
255 length);
256
257 if (data_dir == READ) {
258 flag = MODE_CDIR;
259 dma_dir = DMA_DIR_FROM_CARD;
260 if (card->id.type != MEMSTICK_TYPE_PRO)
261 trans_mode = MS_TM_NORMAL_READ;
262 else
263 trans_mode = MS_TM_AUTO_READ;
264 pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN);
265 } else {
266 flag = MODE_CDOR;
267 dma_dir = DMA_DIR_TO_CARD;
268 if (card->id.type != MEMSTICK_TYPE_PRO)
269 trans_mode = MS_TM_NORMAL_WRITE;
270 else
271 trans_mode = MS_TM_AUTO_WRITE;
272 pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT);
273 }
274
275 rtsx_usb_init_cmd(ucr);
276
277 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
278 if (card->id.type == MEMSTICK_TYPE_PRO) {
279 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_SECTOR_CNT_H,
280 0xFF, (u8)(sec_cnt >> 8));
281 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_SECTOR_CNT_L,
282 0xFF, (u8)sec_cnt);
283 }
284 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
285
286 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3,
287 0xFF, (u8)(length >> 24));
288 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2,
289 0xFF, (u8)(length >> 16));
290 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1,
291 0xFF, (u8)(length >> 8));
292 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0, 0xFF,
293 (u8)length);
294 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
295 0x03 | DMA_PACK_SIZE_MASK, dma_dir | DMA_EN | DMA_512);
296 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
297 0x01, RING_BUFFER);
298
299 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER,
300 0xFF, MS_TRANSFER_START | trans_mode);
301 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER,
302 MS_TRANSFER_END, MS_TRANSFER_END);
303
304 err = rtsx_usb_send_cmd(ucr, flag | STAGE_MS_STATUS, 100);
305 if (err)
306 return err;
307
308 err = rtsx_usb_transfer_data(ucr, pipe, sg, length,
309 1, NULL, 10000);
310 if (err)
311 goto err_out;
312
313 err = rtsx_usb_get_rsp(ucr, 3, 15000);
314 if (err)
315 goto err_out;
316
317 if (ucr->rsp_buf[0] & MS_TRANSFER_ERR ||
318 ucr->rsp_buf[1] & (MS_CRC16_ERR | MS_RDY_TIMEOUT)) {
319 err = -EIO;
320 goto err_out;
321 }
322 return 0;
323 err_out:
324 ms_clear_error(host);
325 return err;
326 }
327
328 static int ms_write_bytes(struct rtsx_usb_ms *host, u8 tpc,
329 u8 cfg, u8 cnt, u8 *data, u8 *int_reg)
330 {
331 struct rtsx_ucr *ucr = host->ucr;
332 int err, i;
333
334 dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc);
335
336 rtsx_usb_init_cmd(ucr);
337
338 for (i = 0; i < cnt; i++)
339 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
340 PPBUF_BASE2 + i, 0xFF, data[i]);
341
342 if (cnt % 2)
343 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
344 PPBUF_BASE2 + i, 0xFF, 0xFF);
345
346 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
347 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt);
348 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
349 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
350 0x01, PINGPONG_BUFFER);
351
352 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER,
353 0xFF, MS_TRANSFER_START | MS_TM_WRITE_BYTES);
354 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER,
355 MS_TRANSFER_END, MS_TRANSFER_END);
356 rtsx_usb_add_cmd(ucr, READ_REG_CMD, MS_TRANS_CFG, 0, 0);
357
358 err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
359 if (err)
360 return err;
361
362 err = rtsx_usb_get_rsp(ucr, 2, 5000);
363 if (err || (ucr->rsp_buf[0] & MS_TRANSFER_ERR)) {
364 u8 val;
365
366 rtsx_usb_ep0_read_register(ucr, MS_TRANS_CFG, &val);
367 dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val);
368
369 if (int_reg)
370 *int_reg = val & 0x0F;
371
372 ms_print_debug_regs(host);
373
374 ms_clear_error(host);
375
376 if (!(tpc & 0x08)) {
377 if (val & MS_CRC16_ERR)
378 return -EIO;
379 } else {
380 if (!(val & 0x80)) {
381 if (val & (MS_INT_ERR | MS_INT_CMDNK))
382 return -EIO;
383 }
384 }
385
386 return -ETIMEDOUT;
387 }
388
389 if (int_reg)
390 *int_reg = ucr->rsp_buf[1] & 0x0F;
391
392 return 0;
393 }
394
395 static int ms_read_bytes(struct rtsx_usb_ms *host, u8 tpc,
396 u8 cfg, u8 cnt, u8 *data, u8 *int_reg)
397 {
398 struct rtsx_ucr *ucr = host->ucr;
399 int err, i;
400 u8 *ptr;
401
402 dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc);
403
404 rtsx_usb_init_cmd(ucr);
405
406 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
407 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt);
408 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
409 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
410 0x01, PINGPONG_BUFFER);
411
412 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER,
413 0xFF, MS_TRANSFER_START | MS_TM_READ_BYTES);
414 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER,
415 MS_TRANSFER_END, MS_TRANSFER_END);
416 for (i = 0; i < cnt - 1; i++)
417 rtsx_usb_add_cmd(ucr, READ_REG_CMD, PPBUF_BASE2 + i, 0, 0);
418 if (cnt % 2)
419 rtsx_usb_add_cmd(ucr, READ_REG_CMD, PPBUF_BASE2 + cnt, 0, 0);
420 else
421 rtsx_usb_add_cmd(ucr, READ_REG_CMD,
422 PPBUF_BASE2 + cnt - 1, 0, 0);
423
424 rtsx_usb_add_cmd(ucr, READ_REG_CMD, MS_TRANS_CFG, 0, 0);
425
426 err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
427 if (err)
428 return err;
429
430 err = rtsx_usb_get_rsp(ucr, cnt + 2, 5000);
431 if (err || (ucr->rsp_buf[0] & MS_TRANSFER_ERR)) {
432 u8 val;
433
434 rtsx_usb_ep0_read_register(ucr, MS_TRANS_CFG, &val);
435 dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val);
436
437 if (int_reg && (host->ifmode != MEMSTICK_SERIAL))
438 *int_reg = val & 0x0F;
439
440 ms_print_debug_regs(host);
441
442 ms_clear_error(host);
443
444 if (!(tpc & 0x08)) {
445 if (val & MS_CRC16_ERR)
446 return -EIO;
447 } else {
448 if (!(val & 0x80)) {
449 if (val & (MS_INT_ERR | MS_INT_CMDNK))
450 return -EIO;
451 }
452 }
453
454 return -ETIMEDOUT;
455 }
456
457 ptr = ucr->rsp_buf + 1;
458 for (i = 0; i < cnt; i++)
459 data[i] = *ptr++;
460
461
462 if (int_reg && (host->ifmode != MEMSTICK_SERIAL))
463 *int_reg = *ptr & 0x0F;
464
465 return 0;
466 }
467
468 static int rtsx_usb_ms_issue_cmd(struct rtsx_usb_ms *host)
469 {
470 struct memstick_request *req = host->req;
471 int err = 0;
472 u8 cfg = 0, int_reg;
473
474 dev_dbg(ms_dev(host), "%s\n", __func__);
475
476 if (req->need_card_int) {
477 if (host->ifmode != MEMSTICK_SERIAL)
478 cfg = WAIT_INT;
479 }
480
481 if (req->long_data) {
482 err = ms_transfer_data(host, req->data_dir,
483 req->tpc, cfg, &(req->sg));
484 } else {
485 if (req->data_dir == READ)
486 err = ms_read_bytes(host, req->tpc, cfg,
487 req->data_len, req->data, &int_reg);
488 else
489 err = ms_write_bytes(host, req->tpc, cfg,
490 req->data_len, req->data, &int_reg);
491 }
492 if (err < 0)
493 return err;
494
495 if (req->need_card_int) {
496 if (host->ifmode == MEMSTICK_SERIAL) {
497 err = ms_read_bytes(host, MS_TPC_GET_INT,
498 NO_WAIT_INT, 1, &req->int_reg, NULL);
499 if (err < 0)
500 return err;
501 } else {
502
503 if (int_reg & MS_INT_CMDNK)
504 req->int_reg |= MEMSTICK_INT_CMDNAK;
505 if (int_reg & MS_INT_BREQ)
506 req->int_reg |= MEMSTICK_INT_BREQ;
507 if (int_reg & MS_INT_ERR)
508 req->int_reg |= MEMSTICK_INT_ERR;
509 if (int_reg & MS_INT_CED)
510 req->int_reg |= MEMSTICK_INT_CED;
511 }
512 dev_dbg(ms_dev(host), "int_reg: 0x%02x\n", req->int_reg);
513 }
514
515 return 0;
516 }
517
518 static void rtsx_usb_ms_handle_req(struct work_struct *work)
519 {
520 struct rtsx_usb_ms *host = container_of(work,
521 struct rtsx_usb_ms, handle_req);
522 struct rtsx_ucr *ucr = host->ucr;
523 struct memstick_host *msh = host->msh;
524 int rc;
525
526 if (!host->req) {
527 pm_runtime_get_sync(ms_dev(host));
528 do {
529 rc = memstick_next_req(msh, &host->req);
530 dev_dbg(ms_dev(host), "next req %d\n", rc);
531
532 if (!rc) {
533 mutex_lock(&ucr->dev_mutex);
534
535 if (rtsx_usb_card_exclusive_check(ucr,
536 RTSX_USB_MS_CARD))
537 host->req->error = -EIO;
538 else
539 host->req->error =
540 rtsx_usb_ms_issue_cmd(host);
541
542 mutex_unlock(&ucr->dev_mutex);
543
544 dev_dbg(ms_dev(host), "req result %d\n",
545 host->req->error);
546 }
547 } while (!rc);
548 pm_runtime_put(ms_dev(host));
549 }
550
551 }
552
553 static void rtsx_usb_ms_request(struct memstick_host *msh)
554 {
555 struct rtsx_usb_ms *host = memstick_priv(msh);
556
557 dev_dbg(ms_dev(host), "--> %s\n", __func__);
558
559 if (!host->eject)
560 schedule_work(&host->handle_req);
561 }
562
563 static int rtsx_usb_ms_set_param(struct memstick_host *msh,
564 enum memstick_param param, int value)
565 {
566 struct rtsx_usb_ms *host = memstick_priv(msh);
567 struct rtsx_ucr *ucr = host->ucr;
568 unsigned int clock = 0;
569 u8 ssc_depth = 0;
570 int err;
571
572 dev_dbg(ms_dev(host), "%s: param = %d, value = %d\n",
573 __func__, param, value);
574
575 pm_runtime_get_sync(ms_dev(host));
576 mutex_lock(&ucr->dev_mutex);
577
578 err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_MS_CARD);
579 if (err)
580 goto out;
581
582 switch (param) {
583 case MEMSTICK_POWER:
584 if (value == host->power_mode)
585 break;
586
587 if (value == MEMSTICK_POWER_ON) {
588 pm_runtime_get_sync(ms_dev(host));
589 err = ms_power_on(host);
590 } else if (value == MEMSTICK_POWER_OFF) {
591 err = ms_power_off(host);
592 if (host->msh->card)
593 pm_runtime_put_noidle(ms_dev(host));
594 else
595 pm_runtime_put(ms_dev(host));
596 } else
597 err = -EINVAL;
598 if (!err)
599 host->power_mode = value;
600 break;
601
602 case MEMSTICK_INTERFACE:
603 if (value == MEMSTICK_SERIAL) {
604 clock = 19000000;
605 ssc_depth = SSC_DEPTH_512K;
606 err = rtsx_usb_write_register(ucr, MS_CFG, 0x5A,
607 MS_BUS_WIDTH_1 | PUSH_TIME_DEFAULT);
608 if (err < 0)
609 break;
610 } else if (value == MEMSTICK_PAR4) {
611 clock = 39000000;
612 ssc_depth = SSC_DEPTH_1M;
613
614 err = rtsx_usb_write_register(ucr, MS_CFG, 0x5A,
615 MS_BUS_WIDTH_4 | PUSH_TIME_ODD |
616 MS_NO_CHECK_INT);
617 if (err < 0)
618 break;
619 } else {
620 err = -EINVAL;
621 break;
622 }
623
624 err = rtsx_usb_switch_clock(ucr, clock,
625 ssc_depth, false, true, false);
626 if (err < 0) {
627 dev_dbg(ms_dev(host), "switch clock failed\n");
628 break;
629 }
630
631 host->ssc_depth = ssc_depth;
632 host->clock = clock;
633 host->ifmode = value;
634 break;
635 default:
636 err = -EINVAL;
637 break;
638 }
639 out:
640 mutex_unlock(&ucr->dev_mutex);
641 pm_runtime_put(ms_dev(host));
642
643 /* power-on delay */
644 if (param == MEMSTICK_POWER && value == MEMSTICK_POWER_ON)
645 usleep_range(10000, 12000);
646
647 dev_dbg(ms_dev(host), "%s: return = %d\n", __func__, err);
648 return err;
649 }
650
651 #ifdef CONFIG_PM_SLEEP
652 static int rtsx_usb_ms_suspend(struct device *dev)
653 {
654 struct rtsx_usb_ms *host = dev_get_drvdata(dev);
655 struct memstick_host *msh = host->msh;
656
657 dev_dbg(ms_dev(host), "--> %s\n", __func__);
658
659 memstick_suspend_host(msh);
660 return 0;
661 }
662
663 static int rtsx_usb_ms_resume(struct device *dev)
664 {
665 struct rtsx_usb_ms *host = dev_get_drvdata(dev);
666 struct memstick_host *msh = host->msh;
667
668 dev_dbg(ms_dev(host), "--> %s\n", __func__);
669
670 memstick_resume_host(msh);
671 return 0;
672 }
673 #endif /* CONFIG_PM_SLEEP */
674
675 /*
676 * Thread function of ms card slot detection. The thread starts right after
677 * successful host addition. It stops while the driver removal function sets
678 * host->eject true.
679 */
680 static int rtsx_usb_detect_ms_card(void *__host)
681 {
682 struct rtsx_usb_ms *host = (struct rtsx_usb_ms *)__host;
683 struct rtsx_ucr *ucr = host->ucr;
684 u8 val = 0;
685 int err;
686
687 for (;;) {
688 pm_runtime_get_sync(ms_dev(host));
689 mutex_lock(&ucr->dev_mutex);
690
691 /* Check pending MS card changes */
692 err = rtsx_usb_read_register(ucr, CARD_INT_PEND, &val);
693 if (err) {
694 mutex_unlock(&ucr->dev_mutex);
695 goto poll_again;
696 }
697
698 /* Clear the pending */
699 rtsx_usb_write_register(ucr, CARD_INT_PEND,
700 XD_INT | MS_INT | SD_INT,
701 XD_INT | MS_INT | SD_INT);
702
703 mutex_unlock(&ucr->dev_mutex);
704
705 if (val & MS_INT) {
706 dev_dbg(ms_dev(host), "MS slot change detected\n");
707 memstick_detect_change(host->msh);
708 }
709
710 poll_again:
711 pm_runtime_put(ms_dev(host));
712 if (host->eject)
713 break;
714
715 schedule_timeout_idle(HZ);
716 }
717
718 complete(&host->detect_ms_exit);
719 return 0;
720 }
721
722 static int rtsx_usb_ms_drv_probe(struct platform_device *pdev)
723 {
724 struct memstick_host *msh;
725 struct rtsx_usb_ms *host;
726 struct rtsx_ucr *ucr;
727 int err;
728
729 ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent));
730 if (!ucr)
731 return -ENXIO;
732
733 dev_dbg(&(pdev->dev),
734 "Realtek USB Memstick controller found\n");
735
736 msh = memstick_alloc_host(sizeof(*host), &pdev->dev);
737 if (!msh)
738 return -ENOMEM;
739
740 host = memstick_priv(msh);
741 host->ucr = ucr;
742 host->msh = msh;
743 host->pdev = pdev;
744 host->power_mode = MEMSTICK_POWER_OFF;
745 platform_set_drvdata(pdev, host);
746
747 mutex_init(&host->host_mutex);
748 INIT_WORK(&host->handle_req, rtsx_usb_ms_handle_req);
749
750 init_completion(&host->detect_ms_exit);
751 host->detect_ms = kthread_create(rtsx_usb_detect_ms_card, host,
752 "rtsx_usb_ms_%d", pdev->id);
753 if (IS_ERR(host->detect_ms)) {
754 dev_dbg(&(pdev->dev),
755 "Unable to create polling thread.\n");
756 err = PTR_ERR(host->detect_ms);
757 goto err_out;
758 }
759
760 msh->request = rtsx_usb_ms_request;
761 msh->set_param = rtsx_usb_ms_set_param;
762 msh->caps = MEMSTICK_CAP_PAR4;
763
764 pm_runtime_enable(&pdev->dev);
765 err = memstick_add_host(msh);
766 if (err)
767 goto err_out;
768
769 wake_up_process(host->detect_ms);
770 return 0;
771 err_out:
772 memstick_free_host(msh);
773 return err;
774 }
775
776 static int rtsx_usb_ms_drv_remove(struct platform_device *pdev)
777 {
778 struct rtsx_usb_ms *host = platform_get_drvdata(pdev);
779 struct memstick_host *msh;
780 int err;
781
782 msh = host->msh;
783 host->eject = true;
784 cancel_work_sync(&host->handle_req);
785
786 mutex_lock(&host->host_mutex);
787 if (host->req) {
788 dev_dbg(&(pdev->dev),
789 "%s: Controller removed during transfer\n",
790 dev_name(&msh->dev));
791 host->req->error = -ENOMEDIUM;
792 do {
793 err = memstick_next_req(msh, &host->req);
794 if (!err)
795 host->req->error = -ENOMEDIUM;
796 } while (!err);
797 }
798 mutex_unlock(&host->host_mutex);
799
800 wait_for_completion(&host->detect_ms_exit);
801 memstick_remove_host(msh);
802 memstick_free_host(msh);
803
804 /* Balance possible unbalanced usage count
805 * e.g. unconditional module removal
806 */
807 if (pm_runtime_active(ms_dev(host)))
808 pm_runtime_put(ms_dev(host));
809
810 pm_runtime_disable(&pdev->dev);
811 platform_set_drvdata(pdev, NULL);
812
813 dev_dbg(&(pdev->dev),
814 ": Realtek USB Memstick controller has been removed\n");
815
816 return 0;
817 }
818
819 static SIMPLE_DEV_PM_OPS(rtsx_usb_ms_pm_ops,
820 rtsx_usb_ms_suspend, rtsx_usb_ms_resume);
821
822 static struct platform_device_id rtsx_usb_ms_ids[] = {
823 {
824 .name = "rtsx_usb_ms",
825 }, {
826 /* sentinel */
827 }
828 };
829 MODULE_DEVICE_TABLE(platform, rtsx_usb_ms_ids);
830
831 static struct platform_driver rtsx_usb_ms_driver = {
832 .probe = rtsx_usb_ms_drv_probe,
833 .remove = rtsx_usb_ms_drv_remove,
834 .id_table = rtsx_usb_ms_ids,
835 .driver = {
836 .name = "rtsx_usb_ms",
837 .pm = &rtsx_usb_ms_pm_ops,
838 },
839 };
840 module_platform_driver(rtsx_usb_ms_driver);
841
842 MODULE_LICENSE("GPL v2");
843 MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>");
844 MODULE_DESCRIPTION("Realtek USB Memstick Card Host Driver");
Linux with added FPC-III support