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Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / drivers / memstick / host / rtsx_usb_ms.c
CommitLineData
99451dce
RT		 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/mfd/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
35struct 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
54static inline struct device *ms_dev(struct rtsx_usb_ms *host)
55{
56 return &(host->pdev->dev);
57}
58
59static 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
72static 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
118static void ms_print_debug_regs(struct rtsx_usb_ms *host)
119{
120}
121
122#endif
123
124static 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
138static 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
152static 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
166static 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
180static 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
220static 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
242static 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;
323err_out:
324 ms_clear_error(host);
325 return err;
326}
327
328static 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
395static 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
468static 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
518static 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 do {
528 rc = memstick_next_req(msh, &host->req);
529 dev_dbg(ms_dev(host), "next req %d\n", rc);
530
531 if (!rc) {
532 mutex_lock(&ucr->dev_mutex);
533
534 if (rtsx_usb_card_exclusive_check(ucr,
535 RTSX_USB_MS_CARD))
536 host->req->error = -EIO;
537 else
538 host->req->error =
539 rtsx_usb_ms_issue_cmd(host);
540
541 mutex_unlock(&ucr->dev_mutex);
542
543 dev_dbg(ms_dev(host), "req result %d\n",
544 host->req->error);
545 }
546 } while (!rc);
547 }
548
549}
550
551static void rtsx_usb_ms_request(struct memstick_host *msh)
552{
553 struct rtsx_usb_ms *host = memstick_priv(msh);
554
555 dev_dbg(ms_dev(host), "--> %s\n", __func__);
556
557 if (!host->eject)
558 schedule_work(&host->handle_req);
559}
560
561static int rtsx_usb_ms_set_param(struct memstick_host *msh,
562 enum memstick_param param, int value)
563{
564 struct rtsx_usb_ms *host = memstick_priv(msh);
565 struct rtsx_ucr *ucr = host->ucr;
566 unsigned int clock = 0;
567 u8 ssc_depth = 0;
568 int err;
569
570 dev_dbg(ms_dev(host), "%s: param = %d, value = %d\n",
571 __func__, param, value);
572
573 mutex_lock(&ucr->dev_mutex);
574
575 err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_MS_CARD);
576 if (err)
577 goto out;
578
579 switch (param) {
580 case MEMSTICK_POWER:
581 if (value == host->power_mode)
582 break;
583
584 if (value == MEMSTICK_POWER_ON) {
585 pm_runtime_get_sync(ms_dev(host));
586 err = ms_power_on(host);
587 } else if (value == MEMSTICK_POWER_OFF) {
588 err = ms_power_off(host);
589 if (host->msh->card)
590 pm_runtime_put_noidle(ms_dev(host));
591 else
592 pm_runtime_put(ms_dev(host));
593 } else
594 err = -EINVAL;
595 if (!err)
596 host->power_mode = value;
597 break;
598
599 case MEMSTICK_INTERFACE:
600 if (value == MEMSTICK_SERIAL) {
601 clock = 19000000;
602 ssc_depth = SSC_DEPTH_512K;
603 err = rtsx_usb_write_register(ucr, MS_CFG, 0x5A,
604 MS_BUS_WIDTH_1 | PUSH_TIME_DEFAULT);
605 if (err < 0)
606 break;
607 } else if (value == MEMSTICK_PAR4) {
608 clock = 39000000;
609 ssc_depth = SSC_DEPTH_1M;
610
611 err = rtsx_usb_write_register(ucr, MS_CFG, 0x5A,
612 MS_BUS_WIDTH_4 | PUSH_TIME_ODD |
613 MS_NO_CHECK_INT);
614 if (err < 0)
615 break;
616 } else {
617 err = -EINVAL;
618 break;
619 }
620
621 err = rtsx_usb_switch_clock(ucr, clock,
622 ssc_depth, false, true, false);
623 if (err < 0) {
624 dev_dbg(ms_dev(host), "switch clock failed\n");
625 break;
626 }
627
628 host->ssc_depth = ssc_depth;
629 host->clock = clock;
630 host->ifmode = value;
631 break;
632 default:
633 err = -EINVAL;
634 break;
635 }
636out:
637 mutex_unlock(&ucr->dev_mutex);
638
639 /* power-on delay */
640 if (param == MEMSTICK_POWER && value == MEMSTICK_POWER_ON)
641 usleep_range(10000, 12000);
642
643 dev_dbg(ms_dev(host), "%s: return = %d\n", __func__, err);
644 return err;
645}
646
647#ifdef CONFIG_PM_SLEEP
648static int rtsx_usb_ms_suspend(struct device *dev)
649{
650 struct rtsx_usb_ms *host = dev_get_drvdata(dev);
651 struct memstick_host *msh = host->msh;
652
653 dev_dbg(ms_dev(host), "--> %s\n", __func__);
654
655 memstick_suspend_host(msh);
656 return 0;
657}
658
659static int rtsx_usb_ms_resume(struct device *dev)
660{
661 struct rtsx_usb_ms *host = dev_get_drvdata(dev);
662 struct memstick_host *msh = host->msh;
663
664 dev_dbg(ms_dev(host), "--> %s\n", __func__);
665
666 memstick_resume_host(msh);
667 return 0;
668}
669#endif /* CONFIG_PM_SLEEP */
670
671/*
672 * Thread function of ms card slot detection. The thread starts right after
673 * successful host addition. It stops while the driver removal function sets
674 * host->eject true.
675 */
676static int rtsx_usb_detect_ms_card(void *__host)
677{
678 struct rtsx_usb_ms *host = (struct rtsx_usb_ms *)__host;
679 struct rtsx_ucr *ucr = host->ucr;
680 u8 val = 0;
681 int err;
682
683 for (;;) {
684 mutex_lock(&ucr->dev_mutex);
685
686 /* Check pending MS card changes */
687 err = rtsx_usb_read_register(ucr, CARD_INT_PEND, &val);
688 if (err) {
689 mutex_unlock(&ucr->dev_mutex);
690 goto poll_again;
691 }
692
693 /* Clear the pending */
694 rtsx_usb_write_register(ucr, CARD_INT_PEND,
695 XD_INT | MS_INT | SD_INT,
696 XD_INT | MS_INT | SD_INT);
697
698 mutex_unlock(&ucr->dev_mutex);
699
700 if (val & MS_INT) {
701 dev_dbg(ms_dev(host), "MS slot change detected\n");
702 memstick_detect_change(host->msh);
703 }
704
705poll_again:
706 if (host->eject)
707 break;
708
709 msleep(1000);
710 }
711
712 complete(&host->detect_ms_exit);
713 return 0;
714}
715
716static int rtsx_usb_ms_drv_probe(struct platform_device *pdev)
717{
718 struct memstick_host *msh;
719 struct rtsx_usb_ms *host;
720 struct rtsx_ucr *ucr;
721 int err;
722
723 ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent));
724 if (!ucr)
725 return -ENXIO;
726
727 dev_dbg(&(pdev->dev),
728 "Realtek USB Memstick controller found\n");
729
730 msh = memstick_alloc_host(sizeof(*host), &pdev->dev);
731 if (!msh)
732 return -ENOMEM;
733
734 host = memstick_priv(msh);
735 host->ucr = ucr;
736 host->msh = msh;
737 host->pdev = pdev;
738 host->power_mode = MEMSTICK_POWER_OFF;
739 platform_set_drvdata(pdev, host);
740
741 mutex_init(&host->host_mutex);
742 INIT_WORK(&host->handle_req, rtsx_usb_ms_handle_req);
743
744 init_completion(&host->detect_ms_exit);
745 host->detect_ms = kthread_create(rtsx_usb_detect_ms_card, host,
746 "rtsx_usb_ms_%d", pdev->id);
747 if (IS_ERR(host->detect_ms)) {
748 dev_dbg(&(pdev->dev),
749 "Unable to create polling thread.\n");
750 err = PTR_ERR(host->detect_ms);
751 goto err_out;
752 }
753
754 msh->request = rtsx_usb_ms_request;
755 msh->set_param = rtsx_usb_ms_set_param;
756 msh->caps = MEMSTICK_CAP_PAR4;
757
758 pm_runtime_enable(&pdev->dev);
759 err = memstick_add_host(msh);
760 if (err)
761 goto err_out;
762
763 wake_up_process(host->detect_ms);
764 return 0;
765err_out:
766 memstick_free_host(msh);
767 return err;
768}
769
770static int rtsx_usb_ms_drv_remove(struct platform_device *pdev)
771{
772 struct rtsx_usb_ms *host = platform_get_drvdata(pdev);
773 struct memstick_host *msh;
774 int err;
775
776 msh = host->msh;
777 host->eject = true;
778 cancel_work_sync(&host->handle_req);
779
780 mutex_lock(&host->host_mutex);
781 if (host->req) {
782 dev_dbg(&(pdev->dev),
783 "%s: Controller removed during transfer\n",
784 dev_name(&msh->dev));
785 host->req->error = -ENOMEDIUM;
786 do {
787 err = memstick_next_req(msh, &host->req);
788 if (!err)
789 host->req->error = -ENOMEDIUM;
790 } while (!err);
791 }
792 mutex_unlock(&host->host_mutex);
793
794 wait_for_completion(&host->detect_ms_exit);
795 memstick_remove_host(msh);
796 memstick_free_host(msh);
797
798 /* Balance possible unbalanced usage count
799 * e.g. unconditional module removal
800 */
801 if (pm_runtime_active(ms_dev(host)))
802 pm_runtime_put(ms_dev(host));
803
804 pm_runtime_disable(&pdev->dev);
805 platform_set_drvdata(pdev, NULL);
806
807 dev_dbg(&(pdev->dev),
808 ": Realtek USB Memstick controller has been removed\n");
809
810 return 0;
811}
812
813static SIMPLE_DEV_PM_OPS(rtsx_usb_ms_pm_ops,
814 rtsx_usb_ms_suspend, rtsx_usb_ms_resume);
815
816static struct platform_device_id rtsx_usb_ms_ids[] = {
817 {
818 .name = "rtsx_usb_ms",
819 }, {
820 /* sentinel */
821 }
822};
823MODULE_DEVICE_TABLE(platform, rtsx_usb_ms_ids);
824
825static struct platform_driver rtsx_usb_ms_driver = {
826 .probe = rtsx_usb_ms_drv_probe,
827 .remove = rtsx_usb_ms_drv_remove,
828 .id_table = rtsx_usb_ms_ids,
829 .driver = {
99451dce
RT		 830 .name = "rtsx_usb_ms",
831 .pm = &rtsx_usb_ms_pm_ops,
832 },
833};
834module_platform_driver(rtsx_usb_ms_driver);
835
836MODULE_LICENSE("GPL v2");
837MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>");
838MODULE_DESCRIPTION("Realtek USB Memstick Card Host Driver");
Linux kernel - Deliverables
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