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730876be RT |
1 | /* Driver for Realtek USB card reader |
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 | #include <linux/module.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/mutex.h> | |
23 | #include <linux/usb.h> | |
24 | #include <linux/platform_device.h> | |
25 | #include <linux/mfd/core.h> | |
26 | #include <linux/mfd/rtsx_usb.h> | |
27 | ||
28 | static int polling_pipe = 1; | |
29 | module_param(polling_pipe, int, S_IRUGO | S_IWUSR); | |
30 | MODULE_PARM_DESC(polling_pipe, "polling pipe (0: ctl, 1: bulk)"); | |
31 | ||
9031a939 | 32 | static const struct mfd_cell rtsx_usb_cells[] = { |
730876be RT |
33 | [RTSX_USB_SD_CARD] = { |
34 | .name = "rtsx_usb_sdmmc", | |
35 | .pdata_size = 0, | |
36 | }, | |
37 | [RTSX_USB_MS_CARD] = { | |
38 | .name = "rtsx_usb_ms", | |
39 | .pdata_size = 0, | |
40 | }, | |
41 | }; | |
42 | ||
43 | static void rtsx_usb_sg_timed_out(unsigned long data) | |
44 | { | |
45 | struct rtsx_ucr *ucr = (struct rtsx_ucr *)data; | |
46 | ||
47 | dev_dbg(&ucr->pusb_intf->dev, "%s: sg transfer timed out", __func__); | |
48 | usb_sg_cancel(&ucr->current_sg); | |
49 | ||
50 | /* we know the cancellation is caused by time-out */ | |
51 | ucr->current_sg.status = -ETIMEDOUT; | |
52 | } | |
53 | ||
54 | static int rtsx_usb_bulk_transfer_sglist(struct rtsx_ucr *ucr, | |
55 | unsigned int pipe, struct scatterlist *sg, int num_sg, | |
56 | unsigned int length, unsigned int *act_len, int timeout) | |
57 | { | |
58 | int ret; | |
59 | ||
60 | dev_dbg(&ucr->pusb_intf->dev, "%s: xfer %u bytes, %d entries\n", | |
61 | __func__, length, num_sg); | |
62 | ret = usb_sg_init(&ucr->current_sg, ucr->pusb_dev, pipe, 0, | |
63 | sg, num_sg, length, GFP_NOIO); | |
64 | if (ret) | |
65 | return ret; | |
66 | ||
67 | ucr->sg_timer.expires = jiffies + msecs_to_jiffies(timeout); | |
68 | add_timer(&ucr->sg_timer); | |
69 | usb_sg_wait(&ucr->current_sg); | |
fea52b89 | 70 | del_timer_sync(&ucr->sg_timer); |
730876be RT |
71 | |
72 | if (act_len) | |
73 | *act_len = ucr->current_sg.bytes; | |
74 | ||
75 | return ucr->current_sg.status; | |
76 | } | |
77 | ||
78 | int rtsx_usb_transfer_data(struct rtsx_ucr *ucr, unsigned int pipe, | |
79 | void *buf, unsigned int len, int num_sg, | |
80 | unsigned int *act_len, int timeout) | |
81 | { | |
82 | if (timeout < 600) | |
83 | timeout = 600; | |
84 | ||
85 | if (num_sg) | |
86 | return rtsx_usb_bulk_transfer_sglist(ucr, pipe, | |
87 | (struct scatterlist *)buf, num_sg, len, act_len, | |
88 | timeout); | |
89 | else | |
90 | return usb_bulk_msg(ucr->pusb_dev, pipe, buf, len, act_len, | |
91 | timeout); | |
92 | } | |
93 | EXPORT_SYMBOL_GPL(rtsx_usb_transfer_data); | |
94 | ||
95 | static inline void rtsx_usb_seq_cmd_hdr(struct rtsx_ucr *ucr, | |
96 | u16 addr, u16 len, u8 seq_type) | |
97 | { | |
98 | rtsx_usb_cmd_hdr_tag(ucr); | |
99 | ||
100 | ucr->cmd_buf[PACKET_TYPE] = seq_type; | |
101 | ucr->cmd_buf[5] = (u8)(len >> 8); | |
102 | ucr->cmd_buf[6] = (u8)len; | |
103 | ucr->cmd_buf[8] = (u8)(addr >> 8); | |
104 | ucr->cmd_buf[9] = (u8)addr; | |
105 | ||
106 | if (seq_type == SEQ_WRITE) | |
107 | ucr->cmd_buf[STAGE_FLAG] = 0; | |
108 | else | |
109 | ucr->cmd_buf[STAGE_FLAG] = STAGE_R; | |
110 | } | |
111 | ||
112 | static int rtsx_usb_seq_write_register(struct rtsx_ucr *ucr, | |
113 | u16 addr, u16 len, u8 *data) | |
114 | { | |
115 | u16 cmd_len = ALIGN(SEQ_WRITE_DATA_OFFSET + len, 4); | |
116 | ||
117 | if (!data) | |
118 | return -EINVAL; | |
119 | ||
120 | if (cmd_len > IOBUF_SIZE) | |
121 | return -EINVAL; | |
122 | ||
123 | rtsx_usb_seq_cmd_hdr(ucr, addr, len, SEQ_WRITE); | |
124 | memcpy(ucr->cmd_buf + SEQ_WRITE_DATA_OFFSET, data, len); | |
125 | ||
126 | return rtsx_usb_transfer_data(ucr, | |
127 | usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT), | |
128 | ucr->cmd_buf, cmd_len, 0, NULL, 100); | |
129 | } | |
130 | ||
131 | static int rtsx_usb_seq_read_register(struct rtsx_ucr *ucr, | |
132 | u16 addr, u16 len, u8 *data) | |
133 | { | |
134 | int i, ret; | |
135 | u16 rsp_len = round_down(len, 4); | |
136 | u16 res_len = len - rsp_len; | |
137 | ||
138 | if (!data) | |
139 | return -EINVAL; | |
140 | ||
141 | /* 4-byte aligned part */ | |
142 | if (rsp_len) { | |
143 | rtsx_usb_seq_cmd_hdr(ucr, addr, len, SEQ_READ); | |
144 | ret = rtsx_usb_transfer_data(ucr, | |
145 | usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT), | |
146 | ucr->cmd_buf, 12, 0, NULL, 100); | |
147 | if (ret) | |
148 | return ret; | |
149 | ||
150 | ret = rtsx_usb_transfer_data(ucr, | |
151 | usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN), | |
152 | data, rsp_len, 0, NULL, 100); | |
153 | if (ret) | |
154 | return ret; | |
155 | } | |
156 | ||
157 | /* unaligned part */ | |
158 | for (i = 0; i < res_len; i++) { | |
159 | ret = rtsx_usb_read_register(ucr, addr + rsp_len + i, | |
160 | data + rsp_len + i); | |
161 | if (ret) | |
162 | return ret; | |
163 | } | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | int rtsx_usb_read_ppbuf(struct rtsx_ucr *ucr, u8 *buf, int buf_len) | |
169 | { | |
170 | return rtsx_usb_seq_read_register(ucr, PPBUF_BASE2, (u16)buf_len, buf); | |
171 | } | |
172 | EXPORT_SYMBOL_GPL(rtsx_usb_read_ppbuf); | |
173 | ||
174 | int rtsx_usb_write_ppbuf(struct rtsx_ucr *ucr, u8 *buf, int buf_len) | |
175 | { | |
176 | return rtsx_usb_seq_write_register(ucr, PPBUF_BASE2, (u16)buf_len, buf); | |
177 | } | |
178 | EXPORT_SYMBOL_GPL(rtsx_usb_write_ppbuf); | |
179 | ||
180 | int rtsx_usb_ep0_write_register(struct rtsx_ucr *ucr, u16 addr, | |
181 | u8 mask, u8 data) | |
182 | { | |
183 | u16 value, index; | |
184 | ||
185 | addr |= EP0_WRITE_REG_CMD << EP0_OP_SHIFT; | |
186 | value = swab16(addr); | |
187 | index = mask | data << 8; | |
188 | ||
189 | return usb_control_msg(ucr->pusb_dev, | |
190 | usb_sndctrlpipe(ucr->pusb_dev, 0), RTSX_USB_REQ_REG_OP, | |
191 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
192 | value, index, NULL, 0, 100); | |
193 | } | |
194 | EXPORT_SYMBOL_GPL(rtsx_usb_ep0_write_register); | |
195 | ||
196 | int rtsx_usb_ep0_read_register(struct rtsx_ucr *ucr, u16 addr, u8 *data) | |
197 | { | |
198 | u16 value; | |
199 | ||
200 | if (!data) | |
201 | return -EINVAL; | |
202 | *data = 0; | |
203 | ||
204 | addr |= EP0_READ_REG_CMD << EP0_OP_SHIFT; | |
205 | value = swab16(addr); | |
206 | ||
207 | return usb_control_msg(ucr->pusb_dev, | |
208 | usb_rcvctrlpipe(ucr->pusb_dev, 0), RTSX_USB_REQ_REG_OP, | |
209 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
210 | value, 0, data, 1, 100); | |
211 | } | |
212 | EXPORT_SYMBOL_GPL(rtsx_usb_ep0_read_register); | |
213 | ||
214 | void rtsx_usb_add_cmd(struct rtsx_ucr *ucr, u8 cmd_type, u16 reg_addr, | |
215 | u8 mask, u8 data) | |
216 | { | |
217 | int i; | |
218 | ||
219 | if (ucr->cmd_idx < (IOBUF_SIZE - CMD_OFFSET) / 4) { | |
220 | i = CMD_OFFSET + ucr->cmd_idx * 4; | |
221 | ||
222 | ucr->cmd_buf[i++] = ((cmd_type & 0x03) << 6) | | |
223 | (u8)((reg_addr >> 8) & 0x3F); | |
224 | ucr->cmd_buf[i++] = (u8)reg_addr; | |
225 | ucr->cmd_buf[i++] = mask; | |
226 | ucr->cmd_buf[i++] = data; | |
227 | ||
228 | ucr->cmd_idx++; | |
229 | } | |
230 | } | |
231 | EXPORT_SYMBOL_GPL(rtsx_usb_add_cmd); | |
232 | ||
233 | int rtsx_usb_send_cmd(struct rtsx_ucr *ucr, u8 flag, int timeout) | |
234 | { | |
235 | int ret; | |
236 | ||
237 | ucr->cmd_buf[CNT_H] = (u8)(ucr->cmd_idx >> 8); | |
238 | ucr->cmd_buf[CNT_L] = (u8)(ucr->cmd_idx); | |
239 | ucr->cmd_buf[STAGE_FLAG] = flag; | |
240 | ||
241 | ret = rtsx_usb_transfer_data(ucr, | |
242 | usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT), | |
243 | ucr->cmd_buf, ucr->cmd_idx * 4 + CMD_OFFSET, | |
244 | 0, NULL, timeout); | |
245 | if (ret) { | |
246 | rtsx_usb_clear_fsm_err(ucr); | |
247 | return ret; | |
248 | } | |
249 | ||
250 | return 0; | |
251 | } | |
252 | EXPORT_SYMBOL_GPL(rtsx_usb_send_cmd); | |
253 | ||
254 | int rtsx_usb_get_rsp(struct rtsx_ucr *ucr, int rsp_len, int timeout) | |
255 | { | |
256 | if (rsp_len <= 0) | |
257 | return -EINVAL; | |
258 | ||
259 | rsp_len = ALIGN(rsp_len, 4); | |
260 | ||
261 | return rtsx_usb_transfer_data(ucr, | |
262 | usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN), | |
263 | ucr->rsp_buf, rsp_len, 0, NULL, timeout); | |
264 | } | |
265 | EXPORT_SYMBOL_GPL(rtsx_usb_get_rsp); | |
266 | ||
267 | static int rtsx_usb_get_status_with_bulk(struct rtsx_ucr *ucr, u16 *status) | |
268 | { | |
269 | int ret; | |
270 | ||
271 | rtsx_usb_init_cmd(ucr); | |
272 | rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_EXIST, 0x00, 0x00); | |
273 | rtsx_usb_add_cmd(ucr, READ_REG_CMD, OCPSTAT, 0x00, 0x00); | |
274 | ret = rtsx_usb_send_cmd(ucr, MODE_CR, 100); | |
275 | if (ret) | |
276 | return ret; | |
277 | ||
278 | ret = rtsx_usb_get_rsp(ucr, 2, 100); | |
279 | if (ret) | |
280 | return ret; | |
281 | ||
282 | *status = ((ucr->rsp_buf[0] >> 2) & 0x0f) | | |
283 | ((ucr->rsp_buf[1] & 0x03) << 4); | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
288 | int rtsx_usb_get_card_status(struct rtsx_ucr *ucr, u16 *status) | |
289 | { | |
290 | int ret; | |
291 | ||
292 | if (!status) | |
293 | return -EINVAL; | |
294 | ||
295 | if (polling_pipe == 0) | |
296 | ret = usb_control_msg(ucr->pusb_dev, | |
297 | usb_rcvctrlpipe(ucr->pusb_dev, 0), | |
298 | RTSX_USB_REQ_POLL, | |
299 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
300 | 0, 0, status, 2, 100); | |
301 | else | |
302 | ret = rtsx_usb_get_status_with_bulk(ucr, status); | |
303 | ||
304 | /* usb_control_msg may return positive when success */ | |
305 | if (ret < 0) | |
306 | return ret; | |
307 | ||
308 | return 0; | |
309 | } | |
310 | EXPORT_SYMBOL_GPL(rtsx_usb_get_card_status); | |
311 | ||
312 | static int rtsx_usb_write_phy_register(struct rtsx_ucr *ucr, u8 addr, u8 val) | |
313 | { | |
314 | dev_dbg(&ucr->pusb_intf->dev, "Write 0x%x to phy register 0x%x\n", | |
315 | val, addr); | |
316 | ||
317 | rtsx_usb_init_cmd(ucr); | |
318 | ||
319 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VSTAIN, 0xFF, val); | |
320 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VCONTROL, 0xFF, addr & 0x0F); | |
321 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00); | |
322 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00); | |
323 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x01); | |
324 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VCONTROL, | |
325 | 0xFF, (addr >> 4) & 0x0F); | |
326 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00); | |
327 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00); | |
328 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x01); | |
329 | ||
330 | return rtsx_usb_send_cmd(ucr, MODE_C, 100); | |
331 | } | |
332 | ||
333 | int rtsx_usb_write_register(struct rtsx_ucr *ucr, u16 addr, u8 mask, u8 data) | |
334 | { | |
335 | rtsx_usb_init_cmd(ucr); | |
336 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, addr, mask, data); | |
337 | return rtsx_usb_send_cmd(ucr, MODE_C, 100); | |
338 | } | |
339 | EXPORT_SYMBOL_GPL(rtsx_usb_write_register); | |
340 | ||
341 | int rtsx_usb_read_register(struct rtsx_ucr *ucr, u16 addr, u8 *data) | |
342 | { | |
343 | int ret; | |
344 | ||
345 | if (data != NULL) | |
346 | *data = 0; | |
347 | ||
348 | rtsx_usb_init_cmd(ucr); | |
349 | rtsx_usb_add_cmd(ucr, READ_REG_CMD, addr, 0, 0); | |
350 | ret = rtsx_usb_send_cmd(ucr, MODE_CR, 100); | |
351 | if (ret) | |
352 | return ret; | |
353 | ||
354 | ret = rtsx_usb_get_rsp(ucr, 1, 100); | |
355 | if (ret) | |
356 | return ret; | |
357 | ||
358 | if (data != NULL) | |
359 | *data = ucr->rsp_buf[0]; | |
360 | ||
361 | return 0; | |
362 | } | |
363 | EXPORT_SYMBOL_GPL(rtsx_usb_read_register); | |
364 | ||
365 | static inline u8 double_ssc_depth(u8 depth) | |
366 | { | |
367 | return (depth > 1) ? (depth - 1) : depth; | |
368 | } | |
369 | ||
370 | static u8 revise_ssc_depth(u8 ssc_depth, u8 div) | |
371 | { | |
372 | if (div > CLK_DIV_1) { | |
373 | if (ssc_depth > div - 1) | |
374 | ssc_depth -= (div - 1); | |
375 | else | |
376 | ssc_depth = SSC_DEPTH_2M; | |
377 | } | |
378 | ||
379 | return ssc_depth; | |
380 | } | |
381 | ||
382 | int rtsx_usb_switch_clock(struct rtsx_ucr *ucr, unsigned int card_clock, | |
383 | u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk) | |
384 | { | |
385 | int ret; | |
386 | u8 n, clk_divider, mcu_cnt, div; | |
387 | ||
388 | if (!card_clock) { | |
389 | ucr->cur_clk = 0; | |
390 | return 0; | |
391 | } | |
392 | ||
393 | if (initial_mode) { | |
394 | /* We use 250k(around) here, in initial stage */ | |
395 | clk_divider = SD_CLK_DIVIDE_128; | |
396 | card_clock = 30000000; | |
397 | } else { | |
398 | clk_divider = SD_CLK_DIVIDE_0; | |
399 | } | |
400 | ||
401 | ret = rtsx_usb_write_register(ucr, SD_CFG1, | |
402 | SD_CLK_DIVIDE_MASK, clk_divider); | |
403 | if (ret < 0) | |
404 | return ret; | |
405 | ||
406 | card_clock /= 1000000; | |
407 | dev_dbg(&ucr->pusb_intf->dev, | |
408 | "Switch card clock to %dMHz\n", card_clock); | |
409 | ||
410 | if (!initial_mode && double_clk) | |
411 | card_clock *= 2; | |
412 | dev_dbg(&ucr->pusb_intf->dev, | |
413 | "Internal SSC clock: %dMHz (cur_clk = %d)\n", | |
414 | card_clock, ucr->cur_clk); | |
415 | ||
416 | if (card_clock == ucr->cur_clk) | |
417 | return 0; | |
418 | ||
419 | /* Converting clock value into internal settings: n and div */ | |
420 | n = card_clock - 2; | |
421 | if ((card_clock <= 2) || (n > MAX_DIV_N)) | |
422 | return -EINVAL; | |
423 | ||
424 | mcu_cnt = 60/card_clock + 3; | |
425 | if (mcu_cnt > 15) | |
426 | mcu_cnt = 15; | |
427 | ||
428 | /* Make sure that the SSC clock div_n is not less than MIN_DIV_N */ | |
429 | ||
430 | div = CLK_DIV_1; | |
431 | while (n < MIN_DIV_N && div < CLK_DIV_4) { | |
432 | n = (n + 2) * 2 - 2; | |
433 | div++; | |
434 | } | |
435 | dev_dbg(&ucr->pusb_intf->dev, "n = %d, div = %d\n", n, div); | |
436 | ||
437 | if (double_clk) | |
438 | ssc_depth = double_ssc_depth(ssc_depth); | |
439 | ||
440 | ssc_depth = revise_ssc_depth(ssc_depth, div); | |
441 | dev_dbg(&ucr->pusb_intf->dev, "ssc_depth = %d\n", ssc_depth); | |
442 | ||
443 | rtsx_usb_init_cmd(ucr); | |
444 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE); | |
445 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, | |
446 | 0x3F, (div << 4) | mcu_cnt); | |
447 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0); | |
448 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_CTL2, | |
449 | SSC_DEPTH_MASK, ssc_depth); | |
450 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n); | |
451 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB); | |
452 | if (vpclk) { | |
453 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, | |
454 | PHASE_NOT_RESET, 0); | |
455 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, | |
456 | PHASE_NOT_RESET, PHASE_NOT_RESET); | |
457 | } | |
458 | ||
459 | ret = rtsx_usb_send_cmd(ucr, MODE_C, 2000); | |
460 | if (ret < 0) | |
461 | return ret; | |
462 | ||
463 | ret = rtsx_usb_write_register(ucr, SSC_CTL1, 0xff, | |
464 | SSC_RSTB | SSC_8X_EN | SSC_SEL_4M); | |
465 | if (ret < 0) | |
466 | return ret; | |
467 | ||
468 | /* Wait SSC clock stable */ | |
469 | usleep_range(100, 1000); | |
470 | ||
471 | ret = rtsx_usb_write_register(ucr, CLK_DIV, CLK_CHANGE, 0); | |
472 | if (ret < 0) | |
473 | return ret; | |
474 | ||
475 | ucr->cur_clk = card_clock; | |
476 | ||
477 | return 0; | |
478 | } | |
479 | EXPORT_SYMBOL_GPL(rtsx_usb_switch_clock); | |
480 | ||
481 | int rtsx_usb_card_exclusive_check(struct rtsx_ucr *ucr, int card) | |
482 | { | |
483 | int ret; | |
484 | u16 val; | |
485 | u16 cd_mask[] = { | |
486 | [RTSX_USB_SD_CARD] = (CD_MASK & ~SD_CD), | |
487 | [RTSX_USB_MS_CARD] = (CD_MASK & ~MS_CD) | |
488 | }; | |
489 | ||
490 | ret = rtsx_usb_get_card_status(ucr, &val); | |
491 | /* | |
492 | * If get status fails, return 0 (ok) for the exclusive check | |
493 | * and let the flow fail at somewhere else. | |
494 | */ | |
495 | if (ret) | |
496 | return 0; | |
497 | ||
498 | if (val & cd_mask[card]) | |
499 | return -EIO; | |
500 | ||
501 | return 0; | |
502 | } | |
503 | EXPORT_SYMBOL_GPL(rtsx_usb_card_exclusive_check); | |
504 | ||
505 | static int rtsx_usb_reset_chip(struct rtsx_ucr *ucr) | |
506 | { | |
507 | int ret; | |
508 | u8 val; | |
509 | ||
510 | rtsx_usb_init_cmd(ucr); | |
511 | ||
512 | if (CHECK_PKG(ucr, LQFP48)) { | |
513 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, | |
514 | LDO3318_PWR_MASK, LDO_SUSPEND); | |
515 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, | |
516 | FORCE_LDO_POWERB, FORCE_LDO_POWERB); | |
517 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, | |
518 | 0x30, 0x10); | |
519 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, | |
520 | 0x03, 0x01); | |
521 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, | |
522 | 0x0C, 0x04); | |
523 | } | |
524 | ||
525 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SYS_DUMMY0, NYET_MSAK, NYET_EN); | |
526 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CD_DEGLITCH_WIDTH, 0xFF, 0x08); | |
527 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, | |
528 | CD_DEGLITCH_EN, XD_CD_DEGLITCH_EN, 0x0); | |
529 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD30_DRIVE_SEL, | |
530 | SD30_DRIVE_MASK, DRIVER_TYPE_D); | |
531 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, | |
532 | CARD_DRIVE_SEL, SD20_DRIVE_MASK, 0x0); | |
533 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG, 0xE0, 0x0); | |
534 | ||
535 | if (ucr->is_rts5179) | |
536 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, | |
537 | CARD_PULL_CTL5, 0x03, 0x01); | |
538 | ||
539 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DMA1_CTL, | |
540 | EXTEND_DMA1_ASYNC_SIGNAL, EXTEND_DMA1_ASYNC_SIGNAL); | |
541 | rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_INT_PEND, | |
542 | XD_INT | MS_INT | SD_INT, | |
543 | XD_INT | MS_INT | SD_INT); | |
544 | ||
545 | ret = rtsx_usb_send_cmd(ucr, MODE_C, 100); | |
546 | if (ret) | |
547 | return ret; | |
548 | ||
549 | /* config non-crystal mode */ | |
550 | rtsx_usb_read_register(ucr, CFG_MODE, &val); | |
551 | if ((val & XTAL_FREE) || ((val & CLK_MODE_MASK) == CLK_MODE_NON_XTAL)) { | |
552 | ret = rtsx_usb_write_phy_register(ucr, 0xC2, 0x7C); | |
553 | if (ret) | |
554 | return ret; | |
555 | } | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
560 | static int rtsx_usb_init_chip(struct rtsx_ucr *ucr) | |
561 | { | |
562 | int ret; | |
563 | u8 val; | |
564 | ||
565 | rtsx_usb_clear_fsm_err(ucr); | |
566 | ||
567 | /* power on SSC */ | |
568 | ret = rtsx_usb_write_register(ucr, | |
569 | FPDCTL, SSC_POWER_MASK, SSC_POWER_ON); | |
570 | if (ret) | |
571 | return ret; | |
572 | ||
573 | usleep_range(100, 1000); | |
574 | ret = rtsx_usb_write_register(ucr, CLK_DIV, CLK_CHANGE, 0x00); | |
575 | if (ret) | |
576 | return ret; | |
577 | ||
578 | /* determine IC version */ | |
579 | ret = rtsx_usb_read_register(ucr, HW_VERSION, &val); | |
580 | if (ret) | |
581 | return ret; | |
582 | ||
583 | ucr->ic_version = val & HW_VER_MASK; | |
584 | ||
585 | /* determine package */ | |
586 | ret = rtsx_usb_read_register(ucr, CARD_SHARE_MODE, &val); | |
587 | if (ret) | |
588 | return ret; | |
589 | ||
590 | if (val & CARD_SHARE_LQFP_SEL) { | |
591 | ucr->package = LQFP48; | |
592 | dev_dbg(&ucr->pusb_intf->dev, "Package: LQFP48\n"); | |
593 | } else { | |
594 | ucr->package = QFN24; | |
595 | dev_dbg(&ucr->pusb_intf->dev, "Package: QFN24\n"); | |
596 | } | |
597 | ||
598 | /* determine IC variations */ | |
599 | rtsx_usb_read_register(ucr, CFG_MODE_1, &val); | |
600 | if (val & RTS5179) { | |
601 | ucr->is_rts5179 = true; | |
602 | dev_dbg(&ucr->pusb_intf->dev, "Device is rts5179\n"); | |
603 | } else { | |
604 | ucr->is_rts5179 = false; | |
605 | } | |
606 | ||
607 | return rtsx_usb_reset_chip(ucr); | |
608 | } | |
609 | ||
610 | static int rtsx_usb_probe(struct usb_interface *intf, | |
611 | const struct usb_device_id *id) | |
612 | { | |
613 | struct usb_device *usb_dev = interface_to_usbdev(intf); | |
614 | struct rtsx_ucr *ucr; | |
615 | int ret; | |
616 | ||
617 | dev_dbg(&intf->dev, | |
618 | ": Realtek USB Card Reader found at bus %03d address %03d\n", | |
619 | usb_dev->bus->busnum, usb_dev->devnum); | |
620 | ||
621 | ucr = devm_kzalloc(&intf->dev, sizeof(*ucr), GFP_KERNEL); | |
622 | if (!ucr) | |
623 | return -ENOMEM; | |
624 | ||
625 | ucr->pusb_dev = usb_dev; | |
626 | ||
627 | ucr->iobuf = usb_alloc_coherent(ucr->pusb_dev, IOBUF_SIZE, | |
628 | GFP_KERNEL, &ucr->iobuf_dma); | |
629 | if (!ucr->iobuf) | |
630 | return -ENOMEM; | |
631 | ||
632 | usb_set_intfdata(intf, ucr); | |
633 | ||
634 | ucr->vendor_id = id->idVendor; | |
635 | ucr->product_id = id->idProduct; | |
636 | ucr->cmd_buf = ucr->rsp_buf = ucr->iobuf; | |
637 | ||
638 | mutex_init(&ucr->dev_mutex); | |
639 | ||
640 | ucr->pusb_intf = intf; | |
641 | ||
642 | /* initialize */ | |
643 | ret = rtsx_usb_init_chip(ucr); | |
644 | if (ret) | |
645 | goto out_init_fail; | |
646 | ||
fea52b89 RT |
647 | /* initialize USB SG transfer timer */ |
648 | setup_timer(&ucr->sg_timer, rtsx_usb_sg_timed_out, (unsigned long) ucr); | |
649 | ||
1ab589c7 JH |
650 | ret = mfd_add_hotplug_devices(&intf->dev, rtsx_usb_cells, |
651 | ARRAY_SIZE(rtsx_usb_cells)); | |
730876be RT |
652 | if (ret) |
653 | goto out_init_fail; | |
654 | ||
730876be RT |
655 | #ifdef CONFIG_PM |
656 | intf->needs_remote_wakeup = 1; | |
657 | usb_enable_autosuspend(usb_dev); | |
658 | #endif | |
659 | ||
660 | return 0; | |
661 | ||
662 | out_init_fail: | |
663 | usb_free_coherent(ucr->pusb_dev, IOBUF_SIZE, ucr->iobuf, | |
664 | ucr->iobuf_dma); | |
665 | return ret; | |
666 | } | |
667 | ||
668 | static void rtsx_usb_disconnect(struct usb_interface *intf) | |
669 | { | |
670 | struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf); | |
671 | ||
672 | dev_dbg(&intf->dev, "%s called\n", __func__); | |
673 | ||
674 | mfd_remove_devices(&intf->dev); | |
675 | ||
676 | usb_set_intfdata(ucr->pusb_intf, NULL); | |
677 | usb_free_coherent(ucr->pusb_dev, IOBUF_SIZE, ucr->iobuf, | |
678 | ucr->iobuf_dma); | |
679 | } | |
680 | ||
681 | #ifdef CONFIG_PM | |
682 | static int rtsx_usb_suspend(struct usb_interface *intf, pm_message_t message) | |
683 | { | |
5e9bbf17 | 684 | dev_dbg(&intf->dev, "%s called with pm message 0x%04x\n", |
730876be RT |
685 | __func__, message.event); |
686 | ||
730876be RT |
687 | return 0; |
688 | } | |
689 | ||
690 | static int rtsx_usb_resume(struct usb_interface *intf) | |
691 | { | |
692 | return 0; | |
693 | } | |
694 | ||
695 | static int rtsx_usb_reset_resume(struct usb_interface *intf) | |
696 | { | |
697 | struct rtsx_ucr *ucr = | |
698 | (struct rtsx_ucr *)usb_get_intfdata(intf); | |
699 | ||
700 | rtsx_usb_reset_chip(ucr); | |
701 | return 0; | |
702 | } | |
703 | ||
704 | #else /* CONFIG_PM */ | |
705 | ||
706 | #define rtsx_usb_suspend NULL | |
707 | #define rtsx_usb_resume NULL | |
708 | #define rtsx_usb_reset_resume NULL | |
709 | ||
710 | #endif /* CONFIG_PM */ | |
711 | ||
712 | ||
713 | static int rtsx_usb_pre_reset(struct usb_interface *intf) | |
714 | { | |
715 | struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf); | |
716 | ||
717 | mutex_lock(&ucr->dev_mutex); | |
718 | return 0; | |
719 | } | |
720 | ||
721 | static int rtsx_usb_post_reset(struct usb_interface *intf) | |
722 | { | |
723 | struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf); | |
724 | ||
725 | mutex_unlock(&ucr->dev_mutex); | |
726 | return 0; | |
727 | } | |
728 | ||
729 | static struct usb_device_id rtsx_usb_usb_ids[] = { | |
730 | { USB_DEVICE(0x0BDA, 0x0129) }, | |
731 | { USB_DEVICE(0x0BDA, 0x0139) }, | |
732 | { USB_DEVICE(0x0BDA, 0x0140) }, | |
733 | { } | |
734 | }; | |
18139089 | 735 | MODULE_DEVICE_TABLE(usb, rtsx_usb_usb_ids); |
730876be RT |
736 | |
737 | static struct usb_driver rtsx_usb_driver = { | |
738 | .name = "rtsx_usb", | |
739 | .probe = rtsx_usb_probe, | |
740 | .disconnect = rtsx_usb_disconnect, | |
741 | .suspend = rtsx_usb_suspend, | |
742 | .resume = rtsx_usb_resume, | |
743 | .reset_resume = rtsx_usb_reset_resume, | |
744 | .pre_reset = rtsx_usb_pre_reset, | |
745 | .post_reset = rtsx_usb_post_reset, | |
746 | .id_table = rtsx_usb_usb_ids, | |
747 | .supports_autosuspend = 1, | |
748 | .soft_unbind = 1, | |
749 | }; | |
750 | ||
751 | module_usb_driver(rtsx_usb_driver); | |
752 | ||
753 | MODULE_LICENSE("GPL v2"); | |
754 | MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>"); | |
755 | MODULE_DESCRIPTION("Realtek USB Card Reader Driver"); |