1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* Driver for Realtek USB card reader |
3 | * |
4 | * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved. |
5 | * |
6 | * Author: |
7 | * Roger Tseng <rogerable@realtek.com> |
8 | */ |
9 | #include <linux/module.h> |
10 | #include <linux/slab.h> |
11 | #include <linux/mutex.h> |
12 | #include <linux/usb.h> |
13 | #include <linux/platform_device.h> |
14 | #include <linux/mfd/core.h> |
15 | #include <linux/rtsx_usb.h> |
16 | |
17 | static int polling_pipe = 1; |
18 | module_param(polling_pipe, int, S_IRUGO | S_IWUSR); |
19 | MODULE_PARM_DESC(polling_pipe, "polling pipe (0: ctl, 1: bulk)" ); |
20 | |
21 | static const struct mfd_cell rtsx_usb_cells[] = { |
22 | [RTSX_USB_SD_CARD] = { |
23 | .name = "rtsx_usb_sdmmc" , |
24 | .pdata_size = 0, |
25 | }, |
26 | [RTSX_USB_MS_CARD] = { |
27 | .name = "rtsx_usb_ms" , |
28 | .pdata_size = 0, |
29 | }, |
30 | }; |
31 | |
32 | static void rtsx_usb_sg_timed_out(struct timer_list *t) |
33 | { |
34 | struct rtsx_ucr *ucr = from_timer(ucr, t, sg_timer); |
35 | |
36 | dev_dbg(&ucr->pusb_intf->dev, "%s: sg transfer timed out" , __func__); |
37 | usb_sg_cancel(io: &ucr->current_sg); |
38 | } |
39 | |
40 | static int rtsx_usb_bulk_transfer_sglist(struct rtsx_ucr *ucr, |
41 | unsigned int pipe, struct scatterlist *sg, int num_sg, |
42 | unsigned int length, unsigned int *act_len, int timeout) |
43 | { |
44 | int ret; |
45 | |
46 | dev_dbg(&ucr->pusb_intf->dev, "%s: xfer %u bytes, %d entries\n" , |
47 | __func__, length, num_sg); |
48 | ret = usb_sg_init(io: &ucr->current_sg, dev: ucr->pusb_dev, pipe, period: 0, |
49 | sg, nents: num_sg, length, GFP_NOIO); |
50 | if (ret) |
51 | return ret; |
52 | |
53 | ucr->sg_timer.expires = jiffies + msecs_to_jiffies(m: timeout); |
54 | add_timer(timer: &ucr->sg_timer); |
55 | usb_sg_wait(io: &ucr->current_sg); |
56 | if (!del_timer_sync(timer: &ucr->sg_timer)) |
57 | ret = -ETIMEDOUT; |
58 | else |
59 | ret = ucr->current_sg.status; |
60 | |
61 | if (act_len) |
62 | *act_len = ucr->current_sg.bytes; |
63 | |
64 | return ret; |
65 | } |
66 | |
67 | int rtsx_usb_transfer_data(struct rtsx_ucr *ucr, unsigned int pipe, |
68 | void *buf, unsigned int len, int num_sg, |
69 | unsigned int *act_len, int timeout) |
70 | { |
71 | if (timeout < 600) |
72 | timeout = 600; |
73 | |
74 | if (num_sg) |
75 | return rtsx_usb_bulk_transfer_sglist(ucr, pipe, |
76 | sg: (struct scatterlist *)buf, num_sg, length: len, act_len, |
77 | timeout); |
78 | else |
79 | return usb_bulk_msg(usb_dev: ucr->pusb_dev, pipe, data: buf, len, actual_length: act_len, |
80 | timeout); |
81 | } |
82 | EXPORT_SYMBOL_GPL(rtsx_usb_transfer_data); |
83 | |
84 | static inline void rtsx_usb_seq_cmd_hdr(struct rtsx_ucr *ucr, |
85 | u16 addr, u16 len, u8 seq_type) |
86 | { |
87 | rtsx_usb_cmd_hdr_tag(ucr); |
88 | |
89 | ucr->cmd_buf[PACKET_TYPE] = seq_type; |
90 | ucr->cmd_buf[5] = (u8)(len >> 8); |
91 | ucr->cmd_buf[6] = (u8)len; |
92 | ucr->cmd_buf[8] = (u8)(addr >> 8); |
93 | ucr->cmd_buf[9] = (u8)addr; |
94 | |
95 | if (seq_type == SEQ_WRITE) |
96 | ucr->cmd_buf[STAGE_FLAG] = 0; |
97 | else |
98 | ucr->cmd_buf[STAGE_FLAG] = STAGE_R; |
99 | } |
100 | |
101 | static int rtsx_usb_seq_write_register(struct rtsx_ucr *ucr, |
102 | u16 addr, u16 len, u8 *data) |
103 | { |
104 | u16 cmd_len = ALIGN(SEQ_WRITE_DATA_OFFSET + len, 4); |
105 | |
106 | if (!data) |
107 | return -EINVAL; |
108 | |
109 | if (cmd_len > IOBUF_SIZE) |
110 | return -EINVAL; |
111 | |
112 | rtsx_usb_seq_cmd_hdr(ucr, addr, len, SEQ_WRITE); |
113 | memcpy(ucr->cmd_buf + SEQ_WRITE_DATA_OFFSET, data, len); |
114 | |
115 | return rtsx_usb_transfer_data(ucr, |
116 | usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT), |
117 | ucr->cmd_buf, cmd_len, 0, NULL, 100); |
118 | } |
119 | |
120 | static int rtsx_usb_seq_read_register(struct rtsx_ucr *ucr, |
121 | u16 addr, u16 len, u8 *data) |
122 | { |
123 | int i, ret; |
124 | u16 rsp_len = round_down(len, 4); |
125 | u16 res_len = len - rsp_len; |
126 | |
127 | if (!data) |
128 | return -EINVAL; |
129 | |
130 | /* 4-byte aligned part */ |
131 | if (rsp_len) { |
132 | rtsx_usb_seq_cmd_hdr(ucr, addr, len, SEQ_READ); |
133 | ret = rtsx_usb_transfer_data(ucr, |
134 | usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT), |
135 | ucr->cmd_buf, 12, 0, NULL, 100); |
136 | if (ret) |
137 | return ret; |
138 | |
139 | ret = rtsx_usb_transfer_data(ucr, |
140 | usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN), |
141 | data, rsp_len, 0, NULL, 100); |
142 | if (ret) |
143 | return ret; |
144 | } |
145 | |
146 | /* unaligned part */ |
147 | for (i = 0; i < res_len; i++) { |
148 | ret = rtsx_usb_read_register(ucr, addr: addr + rsp_len + i, |
149 | data: data + rsp_len + i); |
150 | if (ret) |
151 | return ret; |
152 | } |
153 | |
154 | return 0; |
155 | } |
156 | |
157 | int rtsx_usb_read_ppbuf(struct rtsx_ucr *ucr, u8 *buf, int buf_len) |
158 | { |
159 | return rtsx_usb_seq_read_register(ucr, PPBUF_BASE2, len: (u16)buf_len, data: buf); |
160 | } |
161 | EXPORT_SYMBOL_GPL(rtsx_usb_read_ppbuf); |
162 | |
163 | int rtsx_usb_write_ppbuf(struct rtsx_ucr *ucr, u8 *buf, int buf_len) |
164 | { |
165 | return rtsx_usb_seq_write_register(ucr, PPBUF_BASE2, len: (u16)buf_len, data: buf); |
166 | } |
167 | EXPORT_SYMBOL_GPL(rtsx_usb_write_ppbuf); |
168 | |
169 | int rtsx_usb_ep0_write_register(struct rtsx_ucr *ucr, u16 addr, |
170 | u8 mask, u8 data) |
171 | { |
172 | u16 value, index; |
173 | |
174 | addr |= EP0_WRITE_REG_CMD << EP0_OP_SHIFT; |
175 | value = swab16(addr); |
176 | index = mask | data << 8; |
177 | |
178 | return usb_control_msg(dev: ucr->pusb_dev, |
179 | usb_sndctrlpipe(ucr->pusb_dev, 0), RTSX_USB_REQ_REG_OP, |
180 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
181 | value, index, NULL, size: 0, timeout: 100); |
182 | } |
183 | EXPORT_SYMBOL_GPL(rtsx_usb_ep0_write_register); |
184 | |
185 | int rtsx_usb_ep0_read_register(struct rtsx_ucr *ucr, u16 addr, u8 *data) |
186 | { |
187 | u16 value; |
188 | u8 *buf; |
189 | int ret; |
190 | |
191 | if (!data) |
192 | return -EINVAL; |
193 | |
194 | buf = kzalloc(size: sizeof(u8), GFP_KERNEL); |
195 | if (!buf) |
196 | return -ENOMEM; |
197 | |
198 | addr |= EP0_READ_REG_CMD << EP0_OP_SHIFT; |
199 | value = swab16(addr); |
200 | |
201 | ret = usb_control_msg(dev: ucr->pusb_dev, |
202 | usb_rcvctrlpipe(ucr->pusb_dev, 0), RTSX_USB_REQ_REG_OP, |
203 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
204 | value, index: 0, data: buf, size: 1, timeout: 100); |
205 | *data = *buf; |
206 | |
207 | kfree(objp: buf); |
208 | return ret; |
209 | } |
210 | EXPORT_SYMBOL_GPL(rtsx_usb_ep0_read_register); |
211 | |
212 | void rtsx_usb_add_cmd(struct rtsx_ucr *ucr, u8 cmd_type, u16 reg_addr, |
213 | u8 mask, u8 data) |
214 | { |
215 | int i; |
216 | |
217 | if (ucr->cmd_idx < (IOBUF_SIZE - CMD_OFFSET) / 4) { |
218 | i = CMD_OFFSET + ucr->cmd_idx * 4; |
219 | |
220 | ucr->cmd_buf[i++] = ((cmd_type & 0x03) << 6) | |
221 | (u8)((reg_addr >> 8) & 0x3F); |
222 | ucr->cmd_buf[i++] = (u8)reg_addr; |
223 | ucr->cmd_buf[i++] = mask; |
224 | ucr->cmd_buf[i++] = data; |
225 | |
226 | ucr->cmd_idx++; |
227 | } |
228 | } |
229 | EXPORT_SYMBOL_GPL(rtsx_usb_add_cmd); |
230 | |
231 | int rtsx_usb_send_cmd(struct rtsx_ucr *ucr, u8 flag, int timeout) |
232 | { |
233 | int ret; |
234 | |
235 | ucr->cmd_buf[CNT_H] = (u8)(ucr->cmd_idx >> 8); |
236 | ucr->cmd_buf[CNT_L] = (u8)(ucr->cmd_idx); |
237 | ucr->cmd_buf[STAGE_FLAG] = flag; |
238 | |
239 | ret = rtsx_usb_transfer_data(ucr, |
240 | usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT), |
241 | ucr->cmd_buf, ucr->cmd_idx * 4 + CMD_OFFSET, |
242 | 0, NULL, timeout); |
243 | if (ret) { |
244 | rtsx_usb_clear_fsm_err(ucr); |
245 | return ret; |
246 | } |
247 | |
248 | return 0; |
249 | } |
250 | EXPORT_SYMBOL_GPL(rtsx_usb_send_cmd); |
251 | |
252 | int rtsx_usb_get_rsp(struct rtsx_ucr *ucr, int rsp_len, int timeout) |
253 | { |
254 | if (rsp_len <= 0) |
255 | return -EINVAL; |
256 | |
257 | rsp_len = ALIGN(rsp_len, 4); |
258 | |
259 | return rtsx_usb_transfer_data(ucr, |
260 | usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN), |
261 | ucr->rsp_buf, rsp_len, 0, NULL, timeout); |
262 | } |
263 | EXPORT_SYMBOL_GPL(rtsx_usb_get_rsp); |
264 | |
265 | static int rtsx_usb_get_status_with_bulk(struct rtsx_ucr *ucr, u16 *status) |
266 | { |
267 | int ret; |
268 | |
269 | rtsx_usb_init_cmd(ucr); |
270 | rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_EXIST, 0x00, 0x00); |
271 | rtsx_usb_add_cmd(ucr, READ_REG_CMD, OCPSTAT, 0x00, 0x00); |
272 | ret = rtsx_usb_send_cmd(ucr, MODE_CR, 100); |
273 | if (ret) |
274 | return ret; |
275 | |
276 | ret = rtsx_usb_get_rsp(ucr, 2, 100); |
277 | if (ret) |
278 | return ret; |
279 | |
280 | *status = ((ucr->rsp_buf[0] >> 2) & 0x0f) | |
281 | ((ucr->rsp_buf[1] & 0x03) << 4); |
282 | |
283 | return 0; |
284 | } |
285 | |
286 | int rtsx_usb_get_card_status(struct rtsx_ucr *ucr, u16 *status) |
287 | { |
288 | int ret; |
289 | u16 *buf; |
290 | |
291 | if (!status) |
292 | return -EINVAL; |
293 | |
294 | if (polling_pipe == 0) { |
295 | buf = kzalloc(size: sizeof(u16), GFP_KERNEL); |
296 | if (!buf) |
297 | return -ENOMEM; |
298 | |
299 | ret = usb_control_msg(dev: ucr->pusb_dev, |
300 | usb_rcvctrlpipe(ucr->pusb_dev, 0), |
301 | RTSX_USB_REQ_POLL, |
302 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
303 | value: 0, index: 0, data: buf, size: 2, timeout: 100); |
304 | *status = *buf; |
305 | |
306 | kfree(objp: buf); |
307 | } else { |
308 | ret = rtsx_usb_get_status_with_bulk(ucr, status); |
309 | } |
310 | |
311 | /* usb_control_msg may return positive when success */ |
312 | if (ret < 0) |
313 | return ret; |
314 | |
315 | return 0; |
316 | } |
317 | EXPORT_SYMBOL_GPL(rtsx_usb_get_card_status); |
318 | |
319 | static int rtsx_usb_write_phy_register(struct rtsx_ucr *ucr, u8 addr, u8 val) |
320 | { |
321 | dev_dbg(&ucr->pusb_intf->dev, "Write 0x%x to phy register 0x%x\n" , |
322 | val, addr); |
323 | |
324 | rtsx_usb_init_cmd(ucr); |
325 | |
326 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VSTAIN, 0xFF, val); |
327 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VCONTROL, 0xFF, addr & 0x0F); |
328 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00); |
329 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00); |
330 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x01); |
331 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VCONTROL, |
332 | 0xFF, (addr >> 4) & 0x0F); |
333 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00); |
334 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00); |
335 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x01); |
336 | |
337 | return rtsx_usb_send_cmd(ucr, MODE_C, 100); |
338 | } |
339 | |
340 | int rtsx_usb_write_register(struct rtsx_ucr *ucr, u16 addr, u8 mask, u8 data) |
341 | { |
342 | rtsx_usb_init_cmd(ucr); |
343 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, addr, mask, data); |
344 | return rtsx_usb_send_cmd(ucr, MODE_C, 100); |
345 | } |
346 | EXPORT_SYMBOL_GPL(rtsx_usb_write_register); |
347 | |
348 | int rtsx_usb_read_register(struct rtsx_ucr *ucr, u16 addr, u8 *data) |
349 | { |
350 | int ret; |
351 | |
352 | if (data != NULL) |
353 | *data = 0; |
354 | |
355 | rtsx_usb_init_cmd(ucr); |
356 | rtsx_usb_add_cmd(ucr, READ_REG_CMD, addr, 0, 0); |
357 | ret = rtsx_usb_send_cmd(ucr, MODE_CR, 100); |
358 | if (ret) |
359 | return ret; |
360 | |
361 | ret = rtsx_usb_get_rsp(ucr, 1, 100); |
362 | if (ret) |
363 | return ret; |
364 | |
365 | if (data != NULL) |
366 | *data = ucr->rsp_buf[0]; |
367 | |
368 | return 0; |
369 | } |
370 | EXPORT_SYMBOL_GPL(rtsx_usb_read_register); |
371 | |
372 | static inline u8 double_ssc_depth(u8 depth) |
373 | { |
374 | return (depth > 1) ? (depth - 1) : depth; |
375 | } |
376 | |
377 | static u8 revise_ssc_depth(u8 ssc_depth, u8 div) |
378 | { |
379 | if (div > CLK_DIV_1) { |
380 | if (ssc_depth > div - 1) |
381 | ssc_depth -= (div - 1); |
382 | else |
383 | ssc_depth = SSC_DEPTH_2M; |
384 | } |
385 | |
386 | return ssc_depth; |
387 | } |
388 | |
389 | int rtsx_usb_switch_clock(struct rtsx_ucr *ucr, unsigned int card_clock, |
390 | u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk) |
391 | { |
392 | int ret; |
393 | u8 n, clk_divider, mcu_cnt, div; |
394 | |
395 | if (!card_clock) { |
396 | ucr->cur_clk = 0; |
397 | return 0; |
398 | } |
399 | |
400 | if (initial_mode) { |
401 | /* We use 250k(around) here, in initial stage */ |
402 | clk_divider = SD_CLK_DIVIDE_128; |
403 | card_clock = 30000000; |
404 | } else { |
405 | clk_divider = SD_CLK_DIVIDE_0; |
406 | } |
407 | |
408 | ret = rtsx_usb_write_register(ucr, SD_CFG1, |
409 | SD_CLK_DIVIDE_MASK, clk_divider); |
410 | if (ret < 0) |
411 | return ret; |
412 | |
413 | card_clock /= 1000000; |
414 | dev_dbg(&ucr->pusb_intf->dev, |
415 | "Switch card clock to %dMHz\n" , card_clock); |
416 | |
417 | if (!initial_mode && double_clk) |
418 | card_clock *= 2; |
419 | dev_dbg(&ucr->pusb_intf->dev, |
420 | "Internal SSC clock: %dMHz (cur_clk = %d)\n" , |
421 | card_clock, ucr->cur_clk); |
422 | |
423 | if (card_clock == ucr->cur_clk) |
424 | return 0; |
425 | |
426 | /* Converting clock value into internal settings: n and div */ |
427 | n = card_clock - 2; |
428 | if ((card_clock <= 2) || (n > MAX_DIV_N)) |
429 | return -EINVAL; |
430 | |
431 | mcu_cnt = 60/card_clock + 3; |
432 | if (mcu_cnt > 15) |
433 | mcu_cnt = 15; |
434 | |
435 | /* Make sure that the SSC clock div_n is not less than MIN_DIV_N */ |
436 | |
437 | div = CLK_DIV_1; |
438 | while (n < MIN_DIV_N && div < CLK_DIV_4) { |
439 | n = (n + 2) * 2 - 2; |
440 | div++; |
441 | } |
442 | dev_dbg(&ucr->pusb_intf->dev, "n = %d, div = %d\n" , n, div); |
443 | |
444 | if (double_clk) |
445 | ssc_depth = double_ssc_depth(depth: ssc_depth); |
446 | |
447 | ssc_depth = revise_ssc_depth(ssc_depth, div); |
448 | dev_dbg(&ucr->pusb_intf->dev, "ssc_depth = %d\n" , ssc_depth); |
449 | |
450 | rtsx_usb_init_cmd(ucr); |
451 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE); |
452 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, |
453 | 0x3F, (div << 4) | mcu_cnt); |
454 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0); |
455 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_CTL2, |
456 | SSC_DEPTH_MASK, ssc_depth); |
457 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n); |
458 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB); |
459 | if (vpclk) { |
460 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, |
461 | PHASE_NOT_RESET, 0); |
462 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, |
463 | PHASE_NOT_RESET, PHASE_NOT_RESET); |
464 | } |
465 | |
466 | ret = rtsx_usb_send_cmd(ucr, MODE_C, 2000); |
467 | if (ret < 0) |
468 | return ret; |
469 | |
470 | ret = rtsx_usb_write_register(ucr, SSC_CTL1, 0xff, |
471 | SSC_RSTB | SSC_8X_EN | SSC_SEL_4M); |
472 | if (ret < 0) |
473 | return ret; |
474 | |
475 | /* Wait SSC clock stable */ |
476 | usleep_range(min: 100, max: 1000); |
477 | |
478 | ret = rtsx_usb_write_register(ucr, CLK_DIV, CLK_CHANGE, 0); |
479 | if (ret < 0) |
480 | return ret; |
481 | |
482 | ucr->cur_clk = card_clock; |
483 | |
484 | return 0; |
485 | } |
486 | EXPORT_SYMBOL_GPL(rtsx_usb_switch_clock); |
487 | |
488 | int rtsx_usb_card_exclusive_check(struct rtsx_ucr *ucr, int card) |
489 | { |
490 | int ret; |
491 | u16 val; |
492 | u16 cd_mask[] = { |
493 | [RTSX_USB_SD_CARD] = (CD_MASK & ~SD_CD), |
494 | [RTSX_USB_MS_CARD] = (CD_MASK & ~MS_CD) |
495 | }; |
496 | |
497 | ret = rtsx_usb_get_card_status(ucr, &val); |
498 | /* |
499 | * If get status fails, return 0 (ok) for the exclusive check |
500 | * and let the flow fail at somewhere else. |
501 | */ |
502 | if (ret) |
503 | return 0; |
504 | |
505 | if (val & cd_mask[card]) |
506 | return -EIO; |
507 | |
508 | return 0; |
509 | } |
510 | EXPORT_SYMBOL_GPL(rtsx_usb_card_exclusive_check); |
511 | |
512 | static int rtsx_usb_reset_chip(struct rtsx_ucr *ucr) |
513 | { |
514 | int ret; |
515 | u8 val; |
516 | |
517 | rtsx_usb_init_cmd(ucr); |
518 | |
519 | if (CHECK_PKG(ucr, LQFP48)) { |
520 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, |
521 | LDO3318_PWR_MASK, LDO_SUSPEND); |
522 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, |
523 | FORCE_LDO_POWERB, FORCE_LDO_POWERB); |
524 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, |
525 | 0x30, 0x10); |
526 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, |
527 | 0x03, 0x01); |
528 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, |
529 | 0x0C, 0x04); |
530 | } |
531 | |
532 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SYS_DUMMY0, NYET_MSAK, NYET_EN); |
533 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CD_DEGLITCH_WIDTH, 0xFF, 0x08); |
534 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, |
535 | CD_DEGLITCH_EN, XD_CD_DEGLITCH_EN, 0x0); |
536 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD30_DRIVE_SEL, |
537 | SD30_DRIVE_MASK, DRIVER_TYPE_D); |
538 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, |
539 | CARD_DRIVE_SEL, SD20_DRIVE_MASK, 0x0); |
540 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG, 0xE0, 0x0); |
541 | |
542 | if (ucr->is_rts5179) |
543 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, |
544 | CARD_PULL_CTL5, 0x03, 0x01); |
545 | |
546 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DMA1_CTL, |
547 | EXTEND_DMA1_ASYNC_SIGNAL, EXTEND_DMA1_ASYNC_SIGNAL); |
548 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_INT_PEND, |
549 | XD_INT | MS_INT | SD_INT, |
550 | XD_INT | MS_INT | SD_INT); |
551 | |
552 | ret = rtsx_usb_send_cmd(ucr, MODE_C, 100); |
553 | if (ret) |
554 | return ret; |
555 | |
556 | /* config non-crystal mode */ |
557 | rtsx_usb_read_register(ucr, CFG_MODE, &val); |
558 | if ((val & XTAL_FREE) || ((val & CLK_MODE_MASK) == CLK_MODE_NON_XTAL)) { |
559 | ret = rtsx_usb_write_phy_register(ucr, addr: 0xC2, val: 0x7C); |
560 | if (ret) |
561 | return ret; |
562 | } |
563 | |
564 | return 0; |
565 | } |
566 | |
567 | static int rtsx_usb_init_chip(struct rtsx_ucr *ucr) |
568 | { |
569 | int ret; |
570 | u8 val; |
571 | |
572 | rtsx_usb_clear_fsm_err(ucr); |
573 | |
574 | /* power on SSC */ |
575 | ret = rtsx_usb_write_register(ucr, |
576 | FPDCTL, SSC_POWER_MASK, SSC_POWER_ON); |
577 | if (ret) |
578 | return ret; |
579 | |
580 | usleep_range(min: 100, max: 1000); |
581 | ret = rtsx_usb_write_register(ucr, CLK_DIV, CLK_CHANGE, 0x00); |
582 | if (ret) |
583 | return ret; |
584 | |
585 | /* determine IC version */ |
586 | ret = rtsx_usb_read_register(ucr, HW_VERSION, &val); |
587 | if (ret) |
588 | return ret; |
589 | |
590 | ucr->ic_version = val & HW_VER_MASK; |
591 | |
592 | /* determine package */ |
593 | ret = rtsx_usb_read_register(ucr, CARD_SHARE_MODE, &val); |
594 | if (ret) |
595 | return ret; |
596 | |
597 | if (val & CARD_SHARE_LQFP_SEL) { |
598 | ucr->package = LQFP48; |
599 | dev_dbg(&ucr->pusb_intf->dev, "Package: LQFP48\n" ); |
600 | } else { |
601 | ucr->package = QFN24; |
602 | dev_dbg(&ucr->pusb_intf->dev, "Package: QFN24\n" ); |
603 | } |
604 | |
605 | /* determine IC variations */ |
606 | rtsx_usb_read_register(ucr, CFG_MODE_1, &val); |
607 | if (val & RTS5179) { |
608 | ucr->is_rts5179 = true; |
609 | dev_dbg(&ucr->pusb_intf->dev, "Device is rts5179\n" ); |
610 | } else { |
611 | ucr->is_rts5179 = false; |
612 | } |
613 | |
614 | return rtsx_usb_reset_chip(ucr); |
615 | } |
616 | |
617 | static int rtsx_usb_probe(struct usb_interface *intf, |
618 | const struct usb_device_id *id) |
619 | { |
620 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
621 | struct rtsx_ucr *ucr; |
622 | int ret; |
623 | |
624 | dev_dbg(&intf->dev, |
625 | ": Realtek USB Card Reader found at bus %03d address %03d\n" , |
626 | usb_dev->bus->busnum, usb_dev->devnum); |
627 | |
628 | ucr = devm_kzalloc(dev: &intf->dev, size: sizeof(*ucr), GFP_KERNEL); |
629 | if (!ucr) |
630 | return -ENOMEM; |
631 | |
632 | ucr->pusb_dev = usb_dev; |
633 | |
634 | ucr->cmd_buf = kmalloc(IOBUF_SIZE, GFP_KERNEL); |
635 | if (!ucr->cmd_buf) |
636 | return -ENOMEM; |
637 | |
638 | ucr->rsp_buf = kmalloc(IOBUF_SIZE, GFP_KERNEL); |
639 | if (!ucr->rsp_buf) { |
640 | ret = -ENOMEM; |
641 | goto out_free_cmd_buf; |
642 | } |
643 | |
644 | usb_set_intfdata(intf, data: ucr); |
645 | |
646 | ucr->vendor_id = id->idVendor; |
647 | ucr->product_id = id->idProduct; |
648 | |
649 | mutex_init(&ucr->dev_mutex); |
650 | |
651 | ucr->pusb_intf = intf; |
652 | |
653 | /* initialize */ |
654 | ret = rtsx_usb_init_chip(ucr); |
655 | if (ret) |
656 | goto out_init_fail; |
657 | |
658 | /* initialize USB SG transfer timer */ |
659 | timer_setup(&ucr->sg_timer, rtsx_usb_sg_timed_out, 0); |
660 | |
661 | ret = mfd_add_hotplug_devices(parent: &intf->dev, cells: rtsx_usb_cells, |
662 | ARRAY_SIZE(rtsx_usb_cells)); |
663 | if (ret) |
664 | goto out_init_fail; |
665 | |
666 | #ifdef CONFIG_PM |
667 | intf->needs_remote_wakeup = 1; |
668 | usb_enable_autosuspend(udev: usb_dev); |
669 | #endif |
670 | |
671 | return 0; |
672 | |
673 | out_init_fail: |
674 | usb_set_intfdata(intf: ucr->pusb_intf, NULL); |
675 | kfree(objp: ucr->rsp_buf); |
676 | ucr->rsp_buf = NULL; |
677 | out_free_cmd_buf: |
678 | kfree(objp: ucr->cmd_buf); |
679 | ucr->cmd_buf = NULL; |
680 | return ret; |
681 | } |
682 | |
683 | static void rtsx_usb_disconnect(struct usb_interface *intf) |
684 | { |
685 | struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf); |
686 | |
687 | dev_dbg(&intf->dev, "%s called\n" , __func__); |
688 | |
689 | mfd_remove_devices(parent: &intf->dev); |
690 | |
691 | usb_set_intfdata(intf: ucr->pusb_intf, NULL); |
692 | |
693 | kfree(objp: ucr->cmd_buf); |
694 | ucr->cmd_buf = NULL; |
695 | |
696 | kfree(objp: ucr->rsp_buf); |
697 | ucr->rsp_buf = NULL; |
698 | } |
699 | |
700 | #ifdef CONFIG_PM |
701 | static int rtsx_usb_suspend(struct usb_interface *intf, pm_message_t message) |
702 | { |
703 | struct rtsx_ucr *ucr = |
704 | (struct rtsx_ucr *)usb_get_intfdata(intf); |
705 | u16 val = 0; |
706 | |
707 | dev_dbg(&intf->dev, "%s called with pm message 0x%04x\n" , |
708 | __func__, message.event); |
709 | |
710 | if (PMSG_IS_AUTO(message)) { |
711 | if (mutex_trylock(lock: &ucr->dev_mutex)) { |
712 | rtsx_usb_get_card_status(ucr, &val); |
713 | mutex_unlock(lock: &ucr->dev_mutex); |
714 | |
715 | /* Defer the autosuspend if card exists */ |
716 | if (val & (SD_CD | MS_CD)) |
717 | return -EAGAIN; |
718 | } else { |
719 | /* There is an ongoing operation*/ |
720 | return -EAGAIN; |
721 | } |
722 | } |
723 | |
724 | return 0; |
725 | } |
726 | |
727 | static int rtsx_usb_resume_child(struct device *dev, void *data) |
728 | { |
729 | pm_request_resume(dev); |
730 | return 0; |
731 | } |
732 | |
733 | static int rtsx_usb_resume(struct usb_interface *intf) |
734 | { |
735 | device_for_each_child(dev: &intf->dev, NULL, fn: rtsx_usb_resume_child); |
736 | return 0; |
737 | } |
738 | |
739 | static int rtsx_usb_reset_resume(struct usb_interface *intf) |
740 | { |
741 | struct rtsx_ucr *ucr = |
742 | (struct rtsx_ucr *)usb_get_intfdata(intf); |
743 | |
744 | rtsx_usb_reset_chip(ucr); |
745 | device_for_each_child(dev: &intf->dev, NULL, fn: rtsx_usb_resume_child); |
746 | return 0; |
747 | } |
748 | |
749 | #else /* CONFIG_PM */ |
750 | |
751 | #define rtsx_usb_suspend NULL |
752 | #define rtsx_usb_resume NULL |
753 | #define rtsx_usb_reset_resume NULL |
754 | |
755 | #endif /* CONFIG_PM */ |
756 | |
757 | |
758 | static int rtsx_usb_pre_reset(struct usb_interface *intf) |
759 | { |
760 | struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf); |
761 | |
762 | mutex_lock(&ucr->dev_mutex); |
763 | return 0; |
764 | } |
765 | |
766 | static int rtsx_usb_post_reset(struct usb_interface *intf) |
767 | { |
768 | struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf); |
769 | |
770 | mutex_unlock(lock: &ucr->dev_mutex); |
771 | return 0; |
772 | } |
773 | |
774 | static const struct usb_device_id rtsx_usb_usb_ids[] = { |
775 | { USB_DEVICE(0x0BDA, 0x0129) }, |
776 | { USB_DEVICE(0x0BDA, 0x0139) }, |
777 | { USB_DEVICE(0x0BDA, 0x0140) }, |
778 | { } |
779 | }; |
780 | MODULE_DEVICE_TABLE(usb, rtsx_usb_usb_ids); |
781 | |
782 | static struct usb_driver rtsx_usb_driver = { |
783 | .name = "rtsx_usb" , |
784 | .probe = rtsx_usb_probe, |
785 | .disconnect = rtsx_usb_disconnect, |
786 | .suspend = rtsx_usb_suspend, |
787 | .resume = rtsx_usb_resume, |
788 | .reset_resume = rtsx_usb_reset_resume, |
789 | .pre_reset = rtsx_usb_pre_reset, |
790 | .post_reset = rtsx_usb_post_reset, |
791 | .id_table = rtsx_usb_usb_ids, |
792 | .supports_autosuspend = 1, |
793 | .soft_unbind = 1, |
794 | }; |
795 | |
796 | module_usb_driver(rtsx_usb_driver); |
797 | |
798 | MODULE_LICENSE("GPL v2" ); |
799 | MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>" ); |
800 | MODULE_DESCRIPTION("Realtek USB Card Reader Driver" ); |
801 | |