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authorRoger Tseng <rogerable@realtek.com>2014-04-11 02:53:22 -0400
committerChris Ball <chris@printf.net>2014-05-12 18:05:09 -0400
commitc7f6558d84afe60016b8103c0737df6e376a1c2d (patch)
treee10d1e88c3024f75d5f0ccae44918d883bebb41f /drivers/mmc/host
parent3beef62479bef4309a220f7ca5415d9a66c0b0cb (diff)
mmc: Add realtek USB sdmmc host driver
Realtek USB SD/MMC host driver provides mmc host support based on the Realtek USB card reader MFD driver. Signed-off-by: Roger Tseng <rogerable@realtek.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <chris@printf.net>
Diffstat (limited to 'drivers/mmc/host')
-rw-r--r--drivers/mmc/host/Kconfig7
-rw-r--r--drivers/mmc/host/Makefile1
-rw-r--r--drivers/mmc/host/rtsx_usb_sdmmc.c1455
3 files changed, 1463 insertions, 0 deletions
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 8aaf8c1f3f63..b675882307e4 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -694,3 +694,10 @@ config MMC_REALTEK_PCI
694 help 694 help
695 Say Y here to include driver code to support SD/MMC card interface 695 Say Y here to include driver code to support SD/MMC card interface
696 of Realtek PCI-E card reader 696 of Realtek PCI-E card reader
697
698config MMC_REALTEK_USB
699 tristate "Realtek USB SD/MMC Card Interface Driver"
700 depends on MFD_RTSX_USB
701 help
702 Say Y here to include driver code to support SD/MMC card interface
703 of Realtek RTS5129/39 series card reader
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 0c8aa5e1e304..3eb48b656f25 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -52,6 +52,7 @@ obj-$(CONFIG_MMC_USHC) += ushc.o
52obj-$(CONFIG_MMC_WMT) += wmt-sdmmc.o 52obj-$(CONFIG_MMC_WMT) += wmt-sdmmc.o
53 53
54obj-$(CONFIG_MMC_REALTEK_PCI) += rtsx_pci_sdmmc.o 54obj-$(CONFIG_MMC_REALTEK_PCI) += rtsx_pci_sdmmc.o
55obj-$(CONFIG_MMC_REALTEK_USB) += rtsx_usb_sdmmc.o
55 56
56obj-$(CONFIG_MMC_SDHCI_PLTFM) += sdhci-pltfm.o 57obj-$(CONFIG_MMC_SDHCI_PLTFM) += sdhci-pltfm.o
57obj-$(CONFIG_MMC_SDHCI_CNS3XXX) += sdhci-cns3xxx.o 58obj-$(CONFIG_MMC_SDHCI_CNS3XXX) += sdhci-cns3xxx.o
diff --git a/drivers/mmc/host/rtsx_usb_sdmmc.c b/drivers/mmc/host/rtsx_usb_sdmmc.c
new file mode 100644
index 000000000000..e11fafa6fc6b
--- /dev/null
+++ b/drivers/mmc/host/rtsx_usb_sdmmc.c
@@ -0,0 +1,1455 @@
1/* Realtek USB SD/MMC 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/slab.h>
23#include <linux/delay.h>
24#include <linux/platform_device.h>
25#include <linux/usb.h>
26#include <linux/mmc/host.h>
27#include <linux/mmc/mmc.h>
28#include <linux/mmc/sd.h>
29#include <linux/mmc/sdio.h>
30#include <linux/mmc/card.h>
31#include <linux/scatterlist.h>
32#include <linux/pm_runtime.h>
33
34#include <linux/mfd/rtsx_usb.h>
35#include <asm/unaligned.h>
36
37#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
38#include <linux/leds.h>
39#include <linux/workqueue.h>
40#define RTSX_USB_USE_LEDS_CLASS
41#endif
42
43struct rtsx_usb_sdmmc {
44 struct platform_device *pdev;
45 struct rtsx_ucr *ucr;
46 struct mmc_host *mmc;
47 struct mmc_request *mrq;
48
49 struct mutex host_mutex;
50
51 u8 ssc_depth;
52 unsigned int clock;
53 bool vpclk;
54 bool double_clk;
55 bool host_removal;
56 bool card_exist;
57 bool initial_mode;
58 bool ddr_mode;
59
60 unsigned char power_mode;
61
62#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
63 struct led_classdev led;
64 char led_name[32];
65 struct work_struct led_work;
66#endif
67};
68
69static inline struct device *sdmmc_dev(struct rtsx_usb_sdmmc *host)
70{
71 return &(host->pdev->dev);
72}
73
74static inline void sd_clear_error(struct rtsx_usb_sdmmc *host)
75{
76 struct rtsx_ucr *ucr = host->ucr;
77 rtsx_usb_ep0_write_register(ucr, CARD_STOP,
78 SD_STOP | SD_CLR_ERR,
79 SD_STOP | SD_CLR_ERR);
80
81 rtsx_usb_clear_dma_err(ucr);
82 rtsx_usb_clear_fsm_err(ucr);
83}
84
85#ifdef DEBUG
86static void sd_print_debug_regs(struct rtsx_usb_sdmmc *host)
87{
88 struct rtsx_ucr *ucr = host->ucr;
89 u8 val = 0;
90
91 rtsx_usb_ep0_read_register(ucr, SD_STAT1, &val);
92 dev_dbg(sdmmc_dev(host), "SD_STAT1: 0x%x\n", val);
93 rtsx_usb_ep0_read_register(ucr, SD_STAT2, &val);
94 dev_dbg(sdmmc_dev(host), "SD_STAT2: 0x%x\n", val);
95 rtsx_usb_ep0_read_register(ucr, SD_BUS_STAT, &val);
96 dev_dbg(sdmmc_dev(host), "SD_BUS_STAT: 0x%x\n", val);
97}
98#else
99#define sd_print_debug_regs(host)
100#endif /* DEBUG */
101
102static int sd_read_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd,
103 u16 byte_cnt, u8 *buf, int buf_len, int timeout)
104{
105 struct rtsx_ucr *ucr = host->ucr;
106 int err;
107 u8 trans_mode;
108
109 if (!buf)
110 buf_len = 0;
111
112 rtsx_usb_init_cmd(ucr);
113 if (cmd != NULL) {
114 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__
115 , cmd->opcode);
116 if (cmd->opcode == MMC_SEND_TUNING_BLOCK)
117 trans_mode = SD_TM_AUTO_TUNING;
118 else
119 trans_mode = SD_TM_NORMAL_READ;
120
121 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
122 SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40);
123 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
124 SD_CMD1, 0xFF, (u8)(cmd->arg >> 24));
125 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
126 SD_CMD2, 0xFF, (u8)(cmd->arg >> 16));
127 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
128 SD_CMD3, 0xFF, (u8)(cmd->arg >> 8));
129 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
130 SD_CMD4, 0xFF, (u8)cmd->arg);
131 } else {
132 trans_mode = SD_TM_AUTO_READ_3;
133 }
134
135 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt);
136 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H,
137 0xFF, (u8)(byte_cnt >> 8));
138 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
139 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
140
141 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF,
142 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
143 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
144 if (trans_mode != SD_TM_AUTO_TUNING)
145 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
146 CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
147
148 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER,
149 0xFF, trans_mode | SD_TRANSFER_START);
150 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
151 SD_TRANSFER_END, SD_TRANSFER_END);
152
153 if (cmd != NULL) {
154 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0);
155 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0);
156 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0);
157 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0);
158 }
159
160 err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout);
161 if (err) {
162 dev_dbg(sdmmc_dev(host),
163 "rtsx_usb_send_cmd failed (err = %d)\n", err);
164 return err;
165 }
166
167 err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout);
168 if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) {
169 sd_print_debug_regs(host);
170
171 if (!err) {
172 dev_dbg(sdmmc_dev(host),
173 "Transfer failed (SD_TRANSFER = %02x)\n",
174 ucr->rsp_buf[0]);
175 err = -EIO;
176 } else {
177 dev_dbg(sdmmc_dev(host),
178 "rtsx_usb_get_rsp failed (err = %d)\n", err);
179 }
180
181 return err;
182 }
183
184 if (cmd != NULL) {
185 cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1);
186 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
187 cmd->resp[0]);
188 }
189
190 if (buf && buf_len) {
191 /* 2-byte aligned part */
192 err = rtsx_usb_read_ppbuf(ucr, buf, byte_cnt - (byte_cnt % 2));
193 if (err) {
194 dev_dbg(sdmmc_dev(host),
195 "rtsx_usb_read_ppbuf failed (err = %d)\n", err);
196 return err;
197 }
198
199 /* unaligned byte */
200 if (byte_cnt % 2)
201 return rtsx_usb_read_register(ucr,
202 PPBUF_BASE2 + byte_cnt,
203 buf + byte_cnt - 1);
204 }
205
206 return 0;
207}
208
209static int sd_write_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd,
210 u16 byte_cnt, u8 *buf, int buf_len, int timeout)
211{
212 struct rtsx_ucr *ucr = host->ucr;
213 int err;
214 u8 trans_mode;
215
216 if (!buf)
217 buf_len = 0;
218
219 if (buf && buf_len) {
220 err = rtsx_usb_write_ppbuf(ucr, buf, buf_len);
221 if (err) {
222 dev_dbg(sdmmc_dev(host),
223 "rtsx_usb_write_ppbuf failed (err = %d)\n",
224 err);
225 return err;
226 }
227 }
228
229 trans_mode = (cmd != NULL) ? SD_TM_AUTO_WRITE_2 : SD_TM_AUTO_WRITE_3;
230 rtsx_usb_init_cmd(ucr);
231
232 if (cmd != NULL) {
233 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__,
234 cmd->opcode);
235 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
236 SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40);
237 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
238 SD_CMD1, 0xFF, (u8)(cmd->arg >> 24));
239 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
240 SD_CMD2, 0xFF, (u8)(cmd->arg >> 16));
241 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
242 SD_CMD3, 0xFF, (u8)(cmd->arg >> 8));
243 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
244 SD_CMD4, 0xFF, (u8)cmd->arg);
245 }
246
247 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt);
248 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H,
249 0xFF, (u8)(byte_cnt >> 8));
250 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
251 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
252
253 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF,
254 SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
255 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
256 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
257 CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
258
259 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
260 trans_mode | SD_TRANSFER_START);
261 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
262 SD_TRANSFER_END, SD_TRANSFER_END);
263
264 if (cmd != NULL) {
265 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0);
266 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0);
267 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0);
268 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0);
269 }
270
271 err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout);
272 if (err) {
273 dev_dbg(sdmmc_dev(host),
274 "rtsx_usb_send_cmd failed (err = %d)\n", err);
275 return err;
276 }
277
278 err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout);
279 if (err) {
280 sd_print_debug_regs(host);
281 dev_dbg(sdmmc_dev(host),
282 "rtsx_usb_get_rsp failed (err = %d)\n", err);
283 return err;
284 }
285
286 if (cmd != NULL) {
287 cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1);
288 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
289 cmd->resp[0]);
290 }
291
292 return 0;
293}
294
295static void sd_send_cmd_get_rsp(struct rtsx_usb_sdmmc *host,
296 struct mmc_command *cmd)
297{
298 struct rtsx_ucr *ucr = host->ucr;
299 u8 cmd_idx = (u8)cmd->opcode;
300 u32 arg = cmd->arg;
301 int err = 0;
302 int timeout = 100;
303 int i;
304 u8 *ptr;
305 int stat_idx = 0;
306 int len = 2;
307 u8 rsp_type;
308
309 dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
310 __func__, cmd_idx, arg);
311
312 /* Response type:
313 * R0
314 * R1, R5, R6, R7
315 * R1b
316 * R2
317 * R3, R4
318 */
319 switch (mmc_resp_type(cmd)) {
320 case MMC_RSP_NONE:
321 rsp_type = SD_RSP_TYPE_R0;
322 break;
323 case MMC_RSP_R1:
324 rsp_type = SD_RSP_TYPE_R1;
325 break;
326 case MMC_RSP_R1 & ~MMC_RSP_CRC:
327 rsp_type = SD_RSP_TYPE_R1 | SD_NO_CHECK_CRC7;
328 break;
329 case MMC_RSP_R1B:
330 rsp_type = SD_RSP_TYPE_R1b;
331 break;
332 case MMC_RSP_R2:
333 rsp_type = SD_RSP_TYPE_R2;
334 break;
335 case MMC_RSP_R3:
336 rsp_type = SD_RSP_TYPE_R3;
337 break;
338 default:
339 dev_dbg(sdmmc_dev(host), "cmd->flag is not valid\n");
340 err = -EINVAL;
341 goto out;
342 }
343
344 if (rsp_type == SD_RSP_TYPE_R1b)
345 timeout = 3000;
346
347 if (cmd->opcode == SD_SWITCH_VOLTAGE) {
348 err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
349 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
350 SD_CLK_TOGGLE_EN);
351 if (err)
352 goto out;
353 }
354
355 rtsx_usb_init_cmd(ucr);
356
357 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD0, 0xFF, 0x40 | cmd_idx);
358 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD1, 0xFF, (u8)(arg >> 24));
359 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD2, 0xFF, (u8)(arg >> 16));
360 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD3, 0xFF, (u8)(arg >> 8));
361 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD4, 0xFF, (u8)arg);
362
363 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type);
364 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
365 0x01, PINGPONG_BUFFER);
366 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER,
367 0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START);
368 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
369 SD_TRANSFER_END | SD_STAT_IDLE,
370 SD_TRANSFER_END | SD_STAT_IDLE);
371
372 if (rsp_type == SD_RSP_TYPE_R2) {
373 /* Read data from ping-pong buffer */
374 for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++)
375 rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0);
376 stat_idx = 16;
377 } else if (rsp_type != SD_RSP_TYPE_R0) {
378 /* Read data from SD_CMDx registers */
379 for (i = SD_CMD0; i <= SD_CMD4; i++)
380 rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0);
381 stat_idx = 5;
382 }
383 len += stat_idx;
384
385 rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_STAT1, 0, 0);
386
387 err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
388 if (err) {
389 dev_dbg(sdmmc_dev(host),
390 "rtsx_usb_send_cmd error (err = %d)\n", err);
391 goto out;
392 }
393
394 err = rtsx_usb_get_rsp(ucr, len, timeout);
395 if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) {
396 sd_print_debug_regs(host);
397 sd_clear_error(host);
398
399 if (!err) {
400 dev_dbg(sdmmc_dev(host),
401 "Transfer failed (SD_TRANSFER = %02x)\n",
402 ucr->rsp_buf[0]);
403 err = -EIO;
404 } else {
405 dev_dbg(sdmmc_dev(host),
406 "rtsx_usb_get_rsp failed (err = %d)\n", err);
407 }
408
409 goto out;
410 }
411
412 if (rsp_type == SD_RSP_TYPE_R0) {
413 err = 0;
414 goto out;
415 }
416
417 /* Skip result of CHECK_REG_CMD */
418 ptr = ucr->rsp_buf + 1;
419
420 /* Check (Start,Transmission) bit of Response */
421 if ((ptr[0] & 0xC0) != 0) {
422 err = -EILSEQ;
423 dev_dbg(sdmmc_dev(host), "Invalid response bit\n");
424 goto out;
425 }
426
427 /* Check CRC7 */
428 if (!(rsp_type & SD_NO_CHECK_CRC7)) {
429 if (ptr[stat_idx] & SD_CRC7_ERR) {
430 err = -EILSEQ;
431 dev_dbg(sdmmc_dev(host), "CRC7 error\n");
432 goto out;
433 }
434 }
435
436 if (rsp_type == SD_RSP_TYPE_R2) {
437 for (i = 0; i < 4; i++) {
438 cmd->resp[i] = get_unaligned_be32(ptr + 1 + i * 4);
439 dev_dbg(sdmmc_dev(host), "cmd->resp[%d] = 0x%08x\n",
440 i, cmd->resp[i]);
441 }
442 } else {
443 cmd->resp[0] = get_unaligned_be32(ptr + 1);
444 dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
445 cmd->resp[0]);
446 }
447
448out:
449 cmd->error = err;
450}
451
452static int sd_rw_multi(struct rtsx_usb_sdmmc *host, struct mmc_request *mrq)
453{
454 struct rtsx_ucr *ucr = host->ucr;
455 struct mmc_data *data = mrq->data;
456 int read = (data->flags & MMC_DATA_READ) ? 1 : 0;
457 u8 cfg2, trans_mode;
458 int err;
459 u8 flag;
460 size_t data_len = data->blksz * data->blocks;
461 unsigned int pipe;
462
463 if (read) {
464 dev_dbg(sdmmc_dev(host), "%s: read %zu bytes\n",
465 __func__, data_len);
466 cfg2 = SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
467 SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0;
468 trans_mode = SD_TM_AUTO_READ_3;
469 } else {
470 dev_dbg(sdmmc_dev(host), "%s: write %zu bytes\n",
471 __func__, data_len);
472 cfg2 = SD_NO_CALCULATE_CRC7 | SD_CHECK_CRC16 |
473 SD_NO_WAIT_BUSY_END | SD_NO_CHECK_CRC7 | SD_RSP_LEN_0;
474 trans_mode = SD_TM_AUTO_WRITE_3;
475 }
476
477 rtsx_usb_init_cmd(ucr);
478
479 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, 0x00);
480 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, 0x02);
481 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L,
482 0xFF, (u8)data->blocks);
483 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H,
484 0xFF, (u8)(data->blocks >> 8));
485
486 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
487 0x01, RING_BUFFER);
488
489 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3,
490 0xFF, (u8)(data_len >> 24));
491 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2,
492 0xFF, (u8)(data_len >> 16));
493 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1,
494 0xFF, (u8)(data_len >> 8));
495 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0,
496 0xFF, (u8)data_len);
497 if (read) {
498 flag = MODE_CDIR;
499 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
500 0x03 | DMA_PACK_SIZE_MASK,
501 DMA_DIR_FROM_CARD | DMA_EN | DMA_512);
502 } else {
503 flag = MODE_CDOR;
504 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
505 0x03 | DMA_PACK_SIZE_MASK,
506 DMA_DIR_TO_CARD | DMA_EN | DMA_512);
507 }
508
509 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2);
510 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
511 trans_mode | SD_TRANSFER_START);
512 rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
513 SD_TRANSFER_END, SD_TRANSFER_END);
514
515 err = rtsx_usb_send_cmd(ucr, flag, 100);
516 if (err)
517 return err;
518
519 if (read)
520 pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN);
521 else
522 pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT);
523
524 err = rtsx_usb_transfer_data(ucr, pipe, data->sg, data_len,
525 data->sg_len, NULL, 10000);
526 if (err) {
527 dev_dbg(sdmmc_dev(host), "rtsx_usb_transfer_data error %d\n"
528 , err);
529 sd_clear_error(host);
530 return err;
531 }
532
533 return rtsx_usb_get_rsp(ucr, 1, 2000);
534}
535
536static inline void sd_enable_initial_mode(struct rtsx_usb_sdmmc *host)
537{
538 rtsx_usb_write_register(host->ucr, SD_CFG1,
539 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128);
540}
541
542static inline void sd_disable_initial_mode(struct rtsx_usb_sdmmc *host)
543{
544 rtsx_usb_write_register(host->ucr, SD_CFG1,
545 SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0);
546}
547
548static void sd_normal_rw(struct rtsx_usb_sdmmc *host,
549 struct mmc_request *mrq)
550{
551 struct mmc_command *cmd = mrq->cmd;
552 struct mmc_data *data = mrq->data;
553 u8 *buf;
554
555 buf = kzalloc(data->blksz, GFP_NOIO);
556 if (!buf) {
557 cmd->error = -ENOMEM;
558 return;
559 }
560
561 if (data->flags & MMC_DATA_READ) {
562 if (host->initial_mode)
563 sd_disable_initial_mode(host);
564
565 cmd->error = sd_read_data(host, cmd, (u16)data->blksz, buf,
566 data->blksz, 200);
567
568 if (host->initial_mode)
569 sd_enable_initial_mode(host);
570
571 sg_copy_from_buffer(data->sg, data->sg_len, buf, data->blksz);
572 } else {
573 sg_copy_to_buffer(data->sg, data->sg_len, buf, data->blksz);
574
575 cmd->error = sd_write_data(host, cmd, (u16)data->blksz, buf,
576 data->blksz, 200);
577 }
578
579 kfree(buf);
580}
581
582static int sd_change_phase(struct rtsx_usb_sdmmc *host, u8 sample_point, int tx)
583{
584 struct rtsx_ucr *ucr = host->ucr;
585 int err;
586
587 dev_dbg(sdmmc_dev(host), "%s: %s sample_point = %d\n",
588 __func__, tx ? "TX" : "RX", sample_point);
589
590 rtsx_usb_init_cmd(ucr);
591
592 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE);
593
594 if (tx)
595 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
596 0x0F, sample_point);
597 else
598 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK1_CTL,
599 0x0F, sample_point);
600
601 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0);
602 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
603 PHASE_NOT_RESET, PHASE_NOT_RESET);
604 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, 0);
605 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, SD_ASYNC_FIFO_RST, 0);
606
607 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
608 if (err)
609 return err;
610
611 return 0;
612}
613
614static inline u32 get_phase_point(u32 phase_map, unsigned int idx)
615{
616 idx &= MAX_PHASE;
617 return phase_map & (1 << idx);
618}
619
620static int get_phase_len(u32 phase_map, unsigned int idx)
621{
622 int i;
623
624 for (i = 0; i < MAX_PHASE + 1; i++) {
625 if (get_phase_point(phase_map, idx + i) == 0)
626 return i;
627 }
628 return MAX_PHASE + 1;
629}
630
631static u8 sd_search_final_phase(struct rtsx_usb_sdmmc *host, u32 phase_map)
632{
633 int start = 0, len = 0;
634 int start_final = 0, len_final = 0;
635 u8 final_phase = 0xFF;
636
637 if (phase_map == 0) {
638 dev_dbg(sdmmc_dev(host), "Phase: [map:%x]\n", phase_map);
639 return final_phase;
640 }
641
642 while (start < MAX_PHASE + 1) {
643 len = get_phase_len(phase_map, start);
644 if (len_final < len) {
645 start_final = start;
646 len_final = len;
647 }
648 start += len ? len : 1;
649 }
650
651 final_phase = (start_final + len_final / 2) & MAX_PHASE;
652 dev_dbg(sdmmc_dev(host), "Phase: [map:%x] [maxlen:%d] [final:%d]\n",
653 phase_map, len_final, final_phase);
654
655 return final_phase;
656}
657
658static void sd_wait_data_idle(struct rtsx_usb_sdmmc *host)
659{
660 int err, i;
661 u8 val = 0;
662
663 for (i = 0; i < 100; i++) {
664 err = rtsx_usb_ep0_read_register(host->ucr,
665 SD_DATA_STATE, &val);
666 if (val & SD_DATA_IDLE)
667 return;
668
669 usleep_range(100, 1000);
670 }
671}
672
673static int sd_tuning_rx_cmd(struct rtsx_usb_sdmmc *host,
674 u8 opcode, u8 sample_point)
675{
676 int err;
677 struct mmc_command cmd = {0};
678
679 err = sd_change_phase(host, sample_point, 0);
680 if (err)
681 return err;
682
683 cmd.opcode = MMC_SEND_TUNING_BLOCK;
684 err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100);
685 if (err) {
686 /* Wait till SD DATA IDLE */
687 sd_wait_data_idle(host);
688 sd_clear_error(host);
689 return err;
690 }
691
692 return 0;
693}
694
695static void sd_tuning_phase(struct rtsx_usb_sdmmc *host,
696 u8 opcode, u16 *phase_map)
697{
698 int err, i;
699 u16 raw_phase_map = 0;
700
701 for (i = MAX_PHASE; i >= 0; i--) {
702 err = sd_tuning_rx_cmd(host, opcode, (u8)i);
703 if (!err)
704 raw_phase_map |= 1 << i;
705 }
706
707 if (phase_map)
708 *phase_map = raw_phase_map;
709}
710
711static int sd_tuning_rx(struct rtsx_usb_sdmmc *host, u8 opcode)
712{
713 int err, i;
714 u16 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
715 u8 final_phase;
716
717 /* setting fixed default TX phase */
718 err = sd_change_phase(host, 0x01, 1);
719 if (err) {
720 dev_dbg(sdmmc_dev(host), "TX phase setting failed\n");
721 return err;
722 }
723
724 /* tuning RX phase */
725 for (i = 0; i < RX_TUNING_CNT; i++) {
726 sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
727
728 if (raw_phase_map[i] == 0)
729 break;
730 }
731
732 phase_map = 0xFFFF;
733 for (i = 0; i < RX_TUNING_CNT; i++) {
734 dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%04x\n",
735 i, raw_phase_map[i]);
736 phase_map &= raw_phase_map[i];
737 }
738 dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%04x\n", phase_map);
739
740 if (phase_map) {
741 final_phase = sd_search_final_phase(host, phase_map);
742 if (final_phase == 0xFF)
743 return -EINVAL;
744
745 err = sd_change_phase(host, final_phase, 0);
746 if (err)
747 return err;
748 } else {
749 return -EINVAL;
750 }
751
752 return 0;
753}
754
755static int sdmmc_get_ro(struct mmc_host *mmc)
756{
757 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
758 struct rtsx_ucr *ucr = host->ucr;
759 int err;
760 u16 val;
761
762 if (host->host_removal)
763 return -ENOMEDIUM;
764
765 mutex_lock(&ucr->dev_mutex);
766
767 /* Check SD card detect */
768 err = rtsx_usb_get_card_status(ucr, &val);
769
770 mutex_unlock(&ucr->dev_mutex);
771
772
773 /* Treat failed detection as non-ro */
774 if (err)
775 return 0;
776
777 if (val & SD_WP)
778 return 1;
779
780 return 0;
781}
782
783static int sdmmc_get_cd(struct mmc_host *mmc)
784{
785 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
786 struct rtsx_ucr *ucr = host->ucr;
787 int err;
788 u16 val;
789
790 if (host->host_removal)
791 return -ENOMEDIUM;
792
793 mutex_lock(&ucr->dev_mutex);
794
795 /* Check SD card detect */
796 err = rtsx_usb_get_card_status(ucr, &val);
797
798 mutex_unlock(&ucr->dev_mutex);
799
800 /* Treat failed detection as non-exist */
801 if (err)
802 goto no_card;
803
804 if (val & SD_CD) {
805 host->card_exist = true;
806 return 1;
807 }
808
809no_card:
810 host->card_exist = false;
811 return 0;
812}
813
814static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
815{
816 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
817 struct rtsx_ucr *ucr = host->ucr;
818 struct mmc_command *cmd = mrq->cmd;
819 struct mmc_data *data = mrq->data;
820 unsigned int data_size = 0;
821
822 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
823
824 if (host->host_removal) {
825 cmd->error = -ENOMEDIUM;
826 goto finish;
827 }
828
829 if ((!host->card_exist)) {
830 cmd->error = -ENOMEDIUM;
831 goto finish_detect_card;
832 }
833
834 /*
835 * Reject SDIO CMDs to speed up card identification
836 * since unsupported
837 */
838 if (cmd->opcode == SD_IO_SEND_OP_COND ||
839 cmd->opcode == SD_IO_RW_DIRECT ||
840 cmd->opcode == SD_IO_RW_EXTENDED) {
841 cmd->error = -EINVAL;
842 goto finish;
843 }
844
845 mutex_lock(&ucr->dev_mutex);
846
847 mutex_lock(&host->host_mutex);
848 host->mrq = mrq;
849 mutex_unlock(&host->host_mutex);
850
851 if (mrq->data)
852 data_size = data->blocks * data->blksz;
853
854 if (!data_size) {
855 sd_send_cmd_get_rsp(host, cmd);
856 } else if ((!(data_size % 512) && cmd->opcode != MMC_SEND_EXT_CSD) ||
857 mmc_op_multi(cmd->opcode)) {
858 sd_send_cmd_get_rsp(host, cmd);
859
860 if (!cmd->error) {
861 sd_rw_multi(host, mrq);
862
863 if (mmc_op_multi(cmd->opcode) && mrq->stop) {
864 sd_send_cmd_get_rsp(host, mrq->stop);
865 rtsx_usb_write_register(ucr, MC_FIFO_CTL,
866 FIFO_FLUSH, FIFO_FLUSH);
867 }
868 }
869 } else {
870 sd_normal_rw(host, mrq);
871 }
872
873 if (mrq->data) {
874 if (cmd->error || data->error)
875 data->bytes_xfered = 0;
876 else
877 data->bytes_xfered = data->blocks * data->blksz;
878 }
879
880 mutex_unlock(&ucr->dev_mutex);
881
882finish_detect_card:
883 if (cmd->error) {
884 /*
885 * detect card when fail to update card existence state and
886 * speed up card removal when retry
887 */
888 sdmmc_get_cd(mmc);
889 dev_dbg(sdmmc_dev(host), "cmd->error = %d\n", cmd->error);
890 }
891
892finish:
893 mutex_lock(&host->host_mutex);
894 host->mrq = NULL;
895 mutex_unlock(&host->host_mutex);
896
897 mmc_request_done(mmc, mrq);
898}
899
900static int sd_set_bus_width(struct rtsx_usb_sdmmc *host,
901 unsigned char bus_width)
902{
903 int err = 0;
904 u8 width[] = {
905 [MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT,
906 [MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT,
907 [MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT,
908 };
909
910 if (bus_width <= MMC_BUS_WIDTH_8)
911 err = rtsx_usb_write_register(host->ucr, SD_CFG1,
912 0x03, width[bus_width]);
913
914 return err;
915}
916
917static int sd_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr)
918{
919 rtsx_usb_init_cmd(ucr);
920
921 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
922 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
923 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
924 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
925 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
926 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
927
928 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
929}
930
931static int sd_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr)
932{
933 rtsx_usb_init_cmd(ucr);
934
935 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
936 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
937 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
938 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
939 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56);
940 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
941
942 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
943}
944
945static int sd_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr)
946{
947 rtsx_usb_init_cmd(ucr);
948
949 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xAA);
950 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0xAA);
951 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA9);
952 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
953 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
954 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
955
956 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
957}
958
959static int sd_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr)
960{
961 rtsx_usb_init_cmd(ucr);
962
963 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xA5);
964 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x9A);
965 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA5);
966 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x9A);
967 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x65);
968 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x5A);
969
970 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
971}
972
973static int sd_power_on(struct rtsx_usb_sdmmc *host)
974{
975 struct rtsx_ucr *ucr = host->ucr;
976 int err;
977
978 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
979 rtsx_usb_init_cmd(ucr);
980 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
981 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE,
982 CARD_SHARE_MASK, CARD_SHARE_SD);
983 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN,
984 SD_CLK_EN, SD_CLK_EN);
985 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
986 if (err)
987 return err;
988
989 if (CHECK_PKG(ucr, LQFP48))
990 err = sd_pull_ctl_enable_lqfp48(ucr);
991 else
992 err = sd_pull_ctl_enable_qfn24(ucr);
993 if (err)
994 return err;
995
996 err = rtsx_usb_write_register(ucr, CARD_PWR_CTL,
997 POWER_MASK, PARTIAL_POWER_ON);
998 if (err)
999 return err;
1000
1001 usleep_range(800, 1000);
1002
1003 rtsx_usb_init_cmd(ucr);
1004 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
1005 POWER_MASK|LDO3318_PWR_MASK, POWER_ON|LDO_ON);
1006 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE,
1007 SD_OUTPUT_EN, SD_OUTPUT_EN);
1008
1009 return rtsx_usb_send_cmd(ucr, MODE_C, 100);
1010}
1011
1012static int sd_power_off(struct rtsx_usb_sdmmc *host)
1013{
1014 struct rtsx_ucr *ucr = host->ucr;
1015 int err;
1016
1017 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
1018 rtsx_usb_init_cmd(ucr);
1019
1020 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
1021 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
1022 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
1023 POWER_MASK, POWER_OFF);
1024 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
1025 POWER_MASK|LDO3318_PWR_MASK, POWER_OFF|LDO_SUSPEND);
1026
1027 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
1028 if (err)
1029 return err;
1030
1031 if (CHECK_PKG(ucr, LQFP48))
1032 return sd_pull_ctl_disable_lqfp48(ucr);
1033 return sd_pull_ctl_disable_qfn24(ucr);
1034}
1035
1036static int sd_set_power_mode(struct rtsx_usb_sdmmc *host,
1037 unsigned char power_mode)
1038{
1039 int err;
1040
1041 if (power_mode != MMC_POWER_OFF)
1042 power_mode = MMC_POWER_ON;
1043
1044 if (power_mode == host->power_mode)
1045 return 0;
1046
1047 if (power_mode == MMC_POWER_OFF) {
1048 err = sd_power_off(host);
1049 pm_runtime_put(sdmmc_dev(host));
1050 } else {
1051 pm_runtime_get_sync(sdmmc_dev(host));
1052 err = sd_power_on(host);
1053 }
1054
1055 if (!err)
1056 host->power_mode = power_mode;
1057
1058 return err;
1059}
1060
1061static int sd_set_timing(struct rtsx_usb_sdmmc *host,
1062 unsigned char timing, bool *ddr_mode)
1063{
1064 struct rtsx_ucr *ucr = host->ucr;
1065 int err;
1066
1067 *ddr_mode = false;
1068
1069 rtsx_usb_init_cmd(ucr);
1070
1071 switch (timing) {
1072 case MMC_TIMING_UHS_SDR104:
1073 case MMC_TIMING_UHS_SDR50:
1074 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1075 0x0C | SD_ASYNC_FIFO_RST,
1076 SD_30_MODE | SD_ASYNC_FIFO_RST);
1077 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1078 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1079 break;
1080
1081 case MMC_TIMING_UHS_DDR50:
1082 *ddr_mode = true;
1083
1084 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1085 0x0C | SD_ASYNC_FIFO_RST,
1086 SD_DDR_MODE | SD_ASYNC_FIFO_RST);
1087 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1088 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
1089 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1090 DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
1091 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1092 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD,
1093 DDR_VAR_RX_DAT | DDR_VAR_RX_CMD);
1094 break;
1095
1096 case MMC_TIMING_MMC_HS:
1097 case MMC_TIMING_SD_HS:
1098 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
1099 0x0C, SD_20_MODE);
1100 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1101 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1102 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
1103 SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
1104 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1105 SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
1106 break;
1107
1108 default:
1109 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
1110 SD_CFG1, 0x0C, SD_20_MODE);
1111 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
1112 CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
1113 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
1114 SD_PUSH_POINT_CTL, 0xFF, 0);
1115 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
1116 SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
1117 break;
1118 }
1119
1120 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
1121
1122 return err;
1123}
1124
1125static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1126{
1127 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1128 struct rtsx_ucr *ucr = host->ucr;
1129
1130 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
1131 mutex_lock(&ucr->dev_mutex);
1132
1133 if (rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD)) {
1134 mutex_unlock(&ucr->dev_mutex);
1135 return;
1136 }
1137
1138 sd_set_power_mode(host, ios->power_mode);
1139 sd_set_bus_width(host, ios->bus_width);
1140 sd_set_timing(host, ios->timing, &host->ddr_mode);
1141
1142 host->vpclk = false;
1143 host->double_clk = true;
1144
1145 switch (ios->timing) {
1146 case MMC_TIMING_UHS_SDR104:
1147 case MMC_TIMING_UHS_SDR50:
1148 host->ssc_depth = SSC_DEPTH_2M;
1149 host->vpclk = true;
1150 host->double_clk = false;
1151 break;
1152 case MMC_TIMING_UHS_DDR50:
1153 case MMC_TIMING_UHS_SDR25:
1154 host->ssc_depth = SSC_DEPTH_1M;
1155 break;
1156 default:
1157 host->ssc_depth = SSC_DEPTH_512K;
1158 break;
1159 }
1160
1161 host->initial_mode = (ios->clock <= 1000000) ? true : false;
1162 host->clock = ios->clock;
1163
1164 rtsx_usb_switch_clock(host->ucr, host->clock, host->ssc_depth,
1165 host->initial_mode, host->double_clk, host->vpclk);
1166
1167 mutex_unlock(&ucr->dev_mutex);
1168 dev_dbg(sdmmc_dev(host), "%s end\n", __func__);
1169}
1170
1171static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
1172{
1173 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1174 struct rtsx_ucr *ucr = host->ucr;
1175 int err = 0;
1176
1177 dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
1178 __func__, ios->signal_voltage);
1179
1180 if (host->host_removal)
1181 return -ENOMEDIUM;
1182
1183 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_120)
1184 return -EPERM;
1185
1186 mutex_lock(&ucr->dev_mutex);
1187
1188 err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD);
1189 if (err) {
1190 mutex_unlock(&ucr->dev_mutex);
1191 return err;
1192 }
1193
1194 /* Let mmc core do the busy checking, simply stop the forced-toggle
1195 * clock(while issuing CMD11) and switch voltage.
1196 */
1197 rtsx_usb_init_cmd(ucr);
1198
1199 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1200 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
1201 SD_IO_USING_1V8, SD_IO_USING_3V3);
1202 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
1203 TUNE_SD18_MASK, TUNE_SD18_3V3);
1204 } else {
1205 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BUS_STAT,
1206 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
1207 SD_CLK_FORCE_STOP);
1208 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
1209 SD_IO_USING_1V8, SD_IO_USING_1V8);
1210 rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
1211 TUNE_SD18_MASK, TUNE_SD18_1V8);
1212 }
1213
1214 err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
1215 mutex_unlock(&ucr->dev_mutex);
1216
1217 return err;
1218}
1219
1220static int sdmmc_card_busy(struct mmc_host *mmc)
1221{
1222 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1223 struct rtsx_ucr *ucr = host->ucr;
1224 int err;
1225 u8 stat;
1226 u8 mask = SD_DAT3_STATUS | SD_DAT2_STATUS | SD_DAT1_STATUS
1227 | SD_DAT0_STATUS;
1228
1229 dev_dbg(sdmmc_dev(host), "%s\n", __func__);
1230
1231 mutex_lock(&ucr->dev_mutex);
1232
1233 err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
1234 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
1235 SD_CLK_TOGGLE_EN);
1236 if (err)
1237 goto out;
1238
1239 mdelay(1);
1240
1241 err = rtsx_usb_read_register(ucr, SD_BUS_STAT, &stat);
1242 if (err)
1243 goto out;
1244
1245 err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
1246 SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
1247out:
1248 mutex_unlock(&ucr->dev_mutex);
1249
1250 if (err)
1251 return err;
1252
1253 /* check if any pin between dat[0:3] is low */
1254 if ((stat & mask) != mask)
1255 return 1;
1256 else
1257 return 0;
1258}
1259
1260static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
1261{
1262 struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
1263 struct rtsx_ucr *ucr = host->ucr;
1264 int err = 0;
1265
1266 if (host->host_removal)
1267 return -ENOMEDIUM;
1268
1269 mutex_lock(&ucr->dev_mutex);
1270
1271 if (!host->ddr_mode)
1272 err = sd_tuning_rx(host, MMC_SEND_TUNING_BLOCK);
1273
1274 mutex_unlock(&ucr->dev_mutex);
1275
1276 return err;
1277}
1278
1279static const struct mmc_host_ops rtsx_usb_sdmmc_ops = {
1280 .request = sdmmc_request,
1281 .set_ios = sdmmc_set_ios,
1282 .get_ro = sdmmc_get_ro,
1283 .get_cd = sdmmc_get_cd,
1284 .start_signal_voltage_switch = sdmmc_switch_voltage,
1285 .card_busy = sdmmc_card_busy,
1286 .execute_tuning = sdmmc_execute_tuning,
1287};
1288
1289#ifdef RTSX_USB_USE_LEDS_CLASS
1290static void rtsx_usb_led_control(struct led_classdev *led,
1291 enum led_brightness brightness)
1292{
1293 struct rtsx_usb_sdmmc *host = container_of(led,
1294 struct rtsx_usb_sdmmc, led);
1295
1296 if (host->host_removal)
1297 return;
1298
1299 host->led.brightness = brightness;
1300 schedule_work(&host->led_work);
1301}
1302
1303static void rtsx_usb_update_led(struct work_struct *work)
1304{
1305 struct rtsx_usb_sdmmc *host =
1306 container_of(work, struct rtsx_usb_sdmmc, led_work);
1307 struct rtsx_ucr *ucr = host->ucr;
1308
1309 mutex_lock(&ucr->dev_mutex);
1310
1311 if (host->led.brightness == LED_OFF)
1312 rtsx_usb_turn_off_led(ucr);
1313 else
1314 rtsx_usb_turn_on_led(ucr);
1315
1316 mutex_unlock(&ucr->dev_mutex);
1317}
1318#endif
1319
1320static void rtsx_usb_init_host(struct rtsx_usb_sdmmc *host)
1321{
1322 struct mmc_host *mmc = host->mmc;
1323
1324 mmc->f_min = 250000;
1325 mmc->f_max = 208000000;
1326 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
1327 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
1328 MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
1329 MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | MMC_CAP_UHS_SDR50 |
1330 MMC_CAP_NEEDS_POLL;
1331
1332 mmc->max_current_330 = 400;
1333 mmc->max_current_180 = 800;
1334 mmc->ops = &rtsx_usb_sdmmc_ops;
1335 mmc->max_segs = 256;
1336 mmc->max_seg_size = 65536;
1337 mmc->max_blk_size = 512;
1338 mmc->max_blk_count = 65535;
1339 mmc->max_req_size = 524288;
1340
1341 host->power_mode = MMC_POWER_OFF;
1342}
1343
1344static int rtsx_usb_sdmmc_drv_probe(struct platform_device *pdev)
1345{
1346 struct mmc_host *mmc;
1347 struct rtsx_usb_sdmmc *host;
1348 struct rtsx_ucr *ucr;
1349#ifdef RTSX_USB_USE_LEDS_CLASS
1350 int err;
1351#endif
1352
1353 ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent));
1354 if (!ucr)
1355 return -ENXIO;
1356
1357 dev_dbg(&(pdev->dev), ": Realtek USB SD/MMC controller found\n");
1358
1359 mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
1360 if (!mmc)
1361 return -ENOMEM;
1362
1363 host = mmc_priv(mmc);
1364 host->ucr = ucr;
1365 host->mmc = mmc;
1366 host->pdev = pdev;
1367 platform_set_drvdata(pdev, host);
1368
1369 mutex_init(&host->host_mutex);
1370 rtsx_usb_init_host(host);
1371 pm_runtime_enable(&pdev->dev);
1372
1373#ifdef RTSX_USB_USE_LEDS_CLASS
1374 snprintf(host->led_name, sizeof(host->led_name),
1375 "%s::", mmc_hostname(mmc));
1376 host->led.name = host->led_name;
1377 host->led.brightness = LED_OFF;
1378 host->led.default_trigger = mmc_hostname(mmc);
1379 host->led.brightness_set = rtsx_usb_led_control;
1380
1381 err = led_classdev_register(mmc_dev(mmc), &host->led);
1382 if (err)
1383 dev_err(&(pdev->dev),
1384 "Failed to register LED device: %d\n", err);
1385 INIT_WORK(&host->led_work, rtsx_usb_update_led);
1386
1387#endif
1388 mmc_add_host(mmc);
1389
1390 return 0;
1391}
1392
1393static int rtsx_usb_sdmmc_drv_remove(struct platform_device *pdev)
1394{
1395 struct rtsx_usb_sdmmc *host = platform_get_drvdata(pdev);
1396 struct mmc_host *mmc;
1397
1398 if (!host)
1399 return 0;
1400
1401 mmc = host->mmc;
1402 host->host_removal = true;
1403
1404 mutex_lock(&host->host_mutex);
1405 if (host->mrq) {
1406 dev_dbg(&(pdev->dev),
1407 "%s: Controller removed during transfer\n",
1408 mmc_hostname(mmc));
1409 host->mrq->cmd->error = -ENOMEDIUM;
1410 if (host->mrq->stop)
1411 host->mrq->stop->error = -ENOMEDIUM;
1412 mmc_request_done(mmc, host->mrq);
1413 }
1414 mutex_unlock(&host->host_mutex);
1415
1416 mmc_remove_host(mmc);
1417
1418#ifdef RTSX_USB_USE_LEDS_CLASS
1419 cancel_work_sync(&host->led_work);
1420 led_classdev_unregister(&host->led);
1421#endif
1422
1423 mmc_free_host(mmc);
1424 pm_runtime_disable(&pdev->dev);
1425 platform_set_drvdata(pdev, NULL);
1426
1427 dev_dbg(&(pdev->dev),
1428 ": Realtek USB SD/MMC module has been removed\n");
1429
1430 return 0;
1431}
1432
1433static struct platform_device_id rtsx_usb_sdmmc_ids[] = {
1434 {
1435 .name = "rtsx_usb_sdmmc",
1436 }, {
1437 /* sentinel */
1438 }
1439};
1440MODULE_DEVICE_TABLE(platform, rtsx_usb_sdmmc_ids);
1441
1442static struct platform_driver rtsx_usb_sdmmc_driver = {
1443 .probe = rtsx_usb_sdmmc_drv_probe,
1444 .remove = rtsx_usb_sdmmc_drv_remove,
1445 .id_table = rtsx_usb_sdmmc_ids,
1446 .driver = {
1447 .owner = THIS_MODULE,
1448 .name = "rtsx_usb_sdmmc",
1449 },
1450};
1451module_platform_driver(rtsx_usb_sdmmc_driver);
1452
1453MODULE_LICENSE("GPL v2");
1454MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>");
1455MODULE_DESCRIPTION("Realtek USB SD/MMC Card Host Driver");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-10 14:56:02 -0500