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caab277b | 1 | // SPDX-License-Identifier: GPL-2.0-only |
730876be RT |
2 | /* Driver for Realtek USB card reader |
3 | * | |
4 | * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved. | |
5 | * | |
730876be RT |
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> | |
e455b69d | 15 | #include <linux/rtsx_usb.h> |
730876be RT |
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 | ||
9031a939 | 21 | static const struct mfd_cell rtsx_usb_cells[] = { |
730876be RT |
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 | ||
e99e88a9 | 32 | static void rtsx_usb_sg_timed_out(struct timer_list *t) |
730876be | 33 | { |
e99e88a9 | 34 | struct rtsx_ucr *ucr = from_timer(ucr, t, sg_timer); |
730876be RT |
35 | |
36 | dev_dbg(&ucr->pusb_intf->dev, "%s: sg transfer timed out", __func__); | |
37 | usb_sg_cancel(&ucr->current_sg); | |
730876be RT |
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(&ucr->current_sg, ucr->pusb_dev, pipe, 0, | |
49 | sg, num_sg, length, GFP_NOIO); | |
50 | if (ret) | |
51 | return ret; | |
52 | ||
53 | ucr->sg_timer.expires = jiffies + msecs_to_jiffies(timeout); | |
54 | add_timer(&ucr->sg_timer); | |
55 | usb_sg_wait(&ucr->current_sg); | |
8dcc5ff8 LB |
56 | if (!del_timer_sync(&ucr->sg_timer)) |
57 | ret = -ETIMEDOUT; | |
58 | else | |
59 | ret = ucr->current_sg.status; | |
730876be RT |
60 | |
61 | if (act_len) | |
62 | *act_len = ucr->current_sg.bytes; | |
63 | ||
8dcc5ff8 | 64 | return ret; |
730876be RT |
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 | (struct scatterlist *)buf, num_sg, len, act_len, | |
77 | timeout); | |
78 | else | |
79 | return usb_bulk_msg(ucr->pusb_dev, pipe, buf, len, 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 + rsp_len + i, | |
149 | 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, (u16)buf_len, 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, (u16)buf_len, 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(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, 0, 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; | |
3a43477f RT |
188 | u8 *buf; |
189 | int ret; | |
730876be RT |
190 | |
191 | if (!data) | |
192 | return -EINVAL; | |
3a43477f RT |
193 | |
194 | buf = kzalloc(sizeof(u8), GFP_KERNEL); | |
195 | if (!buf) | |
196 | return -ENOMEM; | |
730876be RT |
197 | |
198 | addr |= EP0_READ_REG_CMD << EP0_OP_SHIFT; | |
199 | value = swab16(addr); | |
200 | ||
3a43477f | 201 | ret = usb_control_msg(ucr->pusb_dev, |
730876be RT |
202 | usb_rcvctrlpipe(ucr->pusb_dev, 0), RTSX_USB_REQ_REG_OP, |
203 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
3a43477f RT |
204 | value, 0, buf, 1, 100); |
205 | *data = *buf; | |
206 | ||
207 | kfree(buf); | |
208 | return ret; | |
730876be RT |
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; | |
3a43477f | 289 | u16 *buf; |
730876be RT |
290 | |
291 | if (!status) | |
292 | return -EINVAL; | |
293 | ||
3a43477f RT |
294 | if (polling_pipe == 0) { |
295 | buf = kzalloc(sizeof(u16), GFP_KERNEL); | |
296 | if (!buf) | |
297 | return -ENOMEM; | |
298 | ||
730876be RT |
299 | ret = usb_control_msg(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, | |
3a43477f RT |
303 | 0, 0, buf, 2, 100); |
304 | *status = *buf; | |
305 | ||
306 | kfree(buf); | |
307 | } else { | |
730876be | 308 | ret = rtsx_usb_get_status_with_bulk(ucr, status); |
3a43477f | 309 | } |
730876be RT |
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(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(100, 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, 0xC2, 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(100, 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(&intf->dev, sizeof(*ucr), GFP_KERNEL); | |
629 | if (!ucr) | |
630 | return -ENOMEM; | |
631 | ||
632 | ucr->pusb_dev = usb_dev; | |
633 | ||
634 | ucr->iobuf = usb_alloc_coherent(ucr->pusb_dev, IOBUF_SIZE, | |
635 | GFP_KERNEL, &ucr->iobuf_dma); | |
636 | if (!ucr->iobuf) | |
637 | return -ENOMEM; | |
638 | ||
639 | usb_set_intfdata(intf, ucr); | |
640 | ||
641 | ucr->vendor_id = id->idVendor; | |
642 | ucr->product_id = id->idProduct; | |
643 | ucr->cmd_buf = ucr->rsp_buf = ucr->iobuf; | |
644 | ||
645 | mutex_init(&ucr->dev_mutex); | |
646 | ||
647 | ucr->pusb_intf = intf; | |
648 | ||
649 | /* initialize */ | |
650 | ret = rtsx_usb_init_chip(ucr); | |
651 | if (ret) | |
652 | goto out_init_fail; | |
653 | ||
fea52b89 | 654 | /* initialize USB SG transfer timer */ |
e99e88a9 | 655 | timer_setup(&ucr->sg_timer, rtsx_usb_sg_timed_out, 0); |
fea52b89 | 656 | |
1ab589c7 JH |
657 | ret = mfd_add_hotplug_devices(&intf->dev, rtsx_usb_cells, |
658 | ARRAY_SIZE(rtsx_usb_cells)); | |
730876be RT |
659 | if (ret) |
660 | goto out_init_fail; | |
661 | ||
730876be RT |
662 | #ifdef CONFIG_PM |
663 | intf->needs_remote_wakeup = 1; | |
664 | usb_enable_autosuspend(usb_dev); | |
665 | #endif | |
666 | ||
667 | return 0; | |
668 | ||
669 | out_init_fail: | |
670 | usb_free_coherent(ucr->pusb_dev, IOBUF_SIZE, ucr->iobuf, | |
671 | ucr->iobuf_dma); | |
672 | return ret; | |
673 | } | |
674 | ||
675 | static void rtsx_usb_disconnect(struct usb_interface *intf) | |
676 | { | |
677 | struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf); | |
678 | ||
679 | dev_dbg(&intf->dev, "%s called\n", __func__); | |
680 | ||
681 | mfd_remove_devices(&intf->dev); | |
682 | ||
683 | usb_set_intfdata(ucr->pusb_intf, NULL); | |
684 | usb_free_coherent(ucr->pusb_dev, IOBUF_SIZE, ucr->iobuf, | |
685 | ucr->iobuf_dma); | |
686 | } | |
687 | ||
688 | #ifdef CONFIG_PM | |
689 | static int rtsx_usb_suspend(struct usb_interface *intf, pm_message_t message) | |
690 | { | |
bb400d21 RT |
691 | struct rtsx_ucr *ucr = |
692 | (struct rtsx_ucr *)usb_get_intfdata(intf); | |
693 | u16 val = 0; | |
694 | ||
5e9bbf17 | 695 | dev_dbg(&intf->dev, "%s called with pm message 0x%04x\n", |
730876be RT |
696 | __func__, message.event); |
697 | ||
bb400d21 RT |
698 | if (PMSG_IS_AUTO(message)) { |
699 | if (mutex_trylock(&ucr->dev_mutex)) { | |
700 | rtsx_usb_get_card_status(ucr, &val); | |
701 | mutex_unlock(&ucr->dev_mutex); | |
702 | ||
703 | /* Defer the autosuspend if card exists */ | |
704 | if (val & (SD_CD | MS_CD)) | |
705 | return -EAGAIN; | |
706 | } else { | |
707 | /* There is an ongoing operation*/ | |
708 | return -EAGAIN; | |
709 | } | |
710 | } | |
711 | ||
730876be RT |
712 | return 0; |
713 | } | |
714 | ||
883a87dd KHF |
715 | static int rtsx_usb_resume_child(struct device *dev, void *data) |
716 | { | |
717 | pm_request_resume(dev); | |
718 | return 0; | |
719 | } | |
720 | ||
730876be RT |
721 | static int rtsx_usb_resume(struct usb_interface *intf) |
722 | { | |
883a87dd | 723 | device_for_each_child(&intf->dev, NULL, rtsx_usb_resume_child); |
730876be RT |
724 | return 0; |
725 | } | |
726 | ||
727 | static int rtsx_usb_reset_resume(struct usb_interface *intf) | |
728 | { | |
729 | struct rtsx_ucr *ucr = | |
730 | (struct rtsx_ucr *)usb_get_intfdata(intf); | |
731 | ||
732 | rtsx_usb_reset_chip(ucr); | |
883a87dd | 733 | device_for_each_child(&intf->dev, NULL, rtsx_usb_resume_child); |
730876be RT |
734 | return 0; |
735 | } | |
736 | ||
737 | #else /* CONFIG_PM */ | |
738 | ||
739 | #define rtsx_usb_suspend NULL | |
740 | #define rtsx_usb_resume NULL | |
741 | #define rtsx_usb_reset_resume NULL | |
742 | ||
743 | #endif /* CONFIG_PM */ | |
744 | ||
745 | ||
746 | static int rtsx_usb_pre_reset(struct usb_interface *intf) | |
747 | { | |
748 | struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf); | |
749 | ||
750 | mutex_lock(&ucr->dev_mutex); | |
751 | return 0; | |
752 | } | |
753 | ||
754 | static int rtsx_usb_post_reset(struct usb_interface *intf) | |
755 | { | |
756 | struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf); | |
757 | ||
758 | mutex_unlock(&ucr->dev_mutex); | |
759 | return 0; | |
760 | } | |
761 | ||
762 | static struct usb_device_id rtsx_usb_usb_ids[] = { | |
763 | { USB_DEVICE(0x0BDA, 0x0129) }, | |
764 | { USB_DEVICE(0x0BDA, 0x0139) }, | |
765 | { USB_DEVICE(0x0BDA, 0x0140) }, | |
766 | { } | |
767 | }; | |
18139089 | 768 | MODULE_DEVICE_TABLE(usb, rtsx_usb_usb_ids); |
730876be RT |
769 | |
770 | static struct usb_driver rtsx_usb_driver = { | |
771 | .name = "rtsx_usb", | |
772 | .probe = rtsx_usb_probe, | |
773 | .disconnect = rtsx_usb_disconnect, | |
774 | .suspend = rtsx_usb_suspend, | |
775 | .resume = rtsx_usb_resume, | |
776 | .reset_resume = rtsx_usb_reset_resume, | |
777 | .pre_reset = rtsx_usb_pre_reset, | |
778 | .post_reset = rtsx_usb_post_reset, | |
779 | .id_table = rtsx_usb_usb_ids, | |
780 | .supports_autosuspend = 1, | |
781 | .soft_unbind = 1, | |
782 | }; | |
783 | ||
784 | module_usb_driver(rtsx_usb_driver); | |
785 | ||
786 | MODULE_LICENSE("GPL v2"); | |
787 | MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>"); | |
788 | MODULE_DESCRIPTION("Realtek USB Card Reader Driver"); |