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ramips: mmc: Add back some non-mt7621 code that staging removed
[openwrt/openwrt.git] / target / linux / ramips / files-4.14 / drivers / mmc / host / mtk-mmc / sd.c
1 /* Copyright Statement:
2 *
3 * This software/firmware and related documentation ("MediaTek Software") are
4 * protected under relevant copyright laws. The information contained herein
5 * is confidential and proprietary to MediaTek Inc. and/or its licensors.
6 * Without the prior written permission of MediaTek inc. and/or its licensors,
7 * any reproduction, modification, use or disclosure of MediaTek Software,
8 * and information contained herein, in whole or in part, shall be strictly prohibited.
9 *
10 * MediaTek Inc. (C) 2010. All rights reserved.
11 *
12 * BY OPENING THIS FILE, RECEIVER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
13 * THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
14 * RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO RECEIVER ON
15 * AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
18 * NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
19 * SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
20 * SUPPLIED WITH THE MEDIATEK SOFTWARE, AND RECEIVER AGREES TO LOOK ONLY TO SUCH
21 * THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. RECEIVER EXPRESSLY ACKNOWLEDGES
22 * THAT IT IS RECEIVER'S SOLE RESPONSIBILITY TO OBTAIN FROM ANY THIRD PARTY ALL PROPER LICENSES
23 * CONTAINED IN MEDIATEK SOFTWARE. MEDIATEK SHALL ALSO NOT BE RESPONSIBLE FOR ANY MEDIATEK
24 * SOFTWARE RELEASES MADE TO RECEIVER'S SPECIFICATION OR TO CONFORM TO A PARTICULAR
25 * STANDARD OR OPEN FORUM. RECEIVER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND
26 * CUMULATIVE LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
27 * AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
28 * OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY RECEIVER TO
29 * MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
30 *
31 * The following software/firmware and/or related documentation ("MediaTek Software")
32 * have been modified by MediaTek Inc. All revisions are subject to any receiver's
33 * applicable license agreements with MediaTek Inc.
34 */
35
36 #include <linux/module.h>
37 #include <linux/delay.h>
38 #include <linux/dma-mapping.h>
39 #include <linux/spinlock.h>
40 #include <linux/platform_device.h>
41 #include <linux/interrupt.h>
42
43 #include <linux/mmc/host.h>
44 #include <linux/mmc/mmc.h>
45 #include <linux/mmc/sd.h>
46 #include <linux/mmc/sdio.h>
47
48 #include <asm/mach-ralink/ralink_regs.h>
49
50 #include "board.h"
51 #include "dbg.h"
52 #include "mt6575_sd.h"
53
54 //#define IRQ_SDC 14 //MT7620 /*FIXME*/
55 #ifdef CONFIG_SOC_MT7621
56 #define RALINK_SYSCTL_BASE 0xbe000000
57 #define RALINK_MSDC_BASE 0xbe130000
58 #else
59 #define RALINK_SYSCTL_BASE 0xb0000000
60 #define RALINK_MSDC_BASE 0xb0130000
61 #endif
62 #define IRQ_SDC 22 /*FIXME*/
63
64 #define DRV_NAME "mtk-sd"
65
66 #if defined(CONFIG_SOC_MT7620)
67 #define HOST_MAX_MCLK (48000000) /* +/- by chhung */
68 #elif defined(CONFIG_SOC_MT7621)
69 #define HOST_MAX_MCLK (50000000) /* +/- by chhung */
70 #endif
71 #define HOST_MIN_MCLK (260000)
72
73 #define HOST_MAX_BLKSZ (2048)
74
75 #define MSDC_OCR_AVAIL (MMC_VDD_28_29 | MMC_VDD_29_30 | MMC_VDD_30_31 | MMC_VDD_31_32 | MMC_VDD_32_33)
76
77 #define GPIO_PULL_DOWN (0)
78 #define GPIO_PULL_UP (1)
79
80 #if 0 /* --- by chhung */
81 #define MSDC_CLKSRC_REG (0xf100000C)
82 #define PDN_REG (0xF1000010)
83 #endif /* end of --- */
84
85 #define DEFAULT_DEBOUNCE (8) /* 8 cycles */
86 #define DEFAULT_DTOC (40) /* data timeout counter. 65536x40 sclk. */
87
88 #define CMD_TIMEOUT (HZ / 10) /* 100ms */
89 #define DAT_TIMEOUT (HZ / 2 * 5) /* 500ms x5 */
90
91 #define MAX_DMA_CNT (64 * 1024 - 512) /* a single transaction for WIFI may be 50K*/
92
93 #define MAX_GPD_NUM (1 + 1) /* one null gpd */
94 #define MAX_BD_NUM (1024)
95 #define MAX_BD_PER_GPD (MAX_BD_NUM)
96
97 #define MAX_HW_SGMTS (MAX_BD_NUM)
98 #define MAX_PHY_SGMTS (MAX_BD_NUM)
99 #define MAX_SGMT_SZ (MAX_DMA_CNT)
100 #define MAX_REQ_SZ (MAX_SGMT_SZ * 8)
101
102 static int cd_active_low = 1;
103
104 //=================================
105 #define PERI_MSDC0_PDN (15)
106 //#define PERI_MSDC1_PDN (16)
107 //#define PERI_MSDC2_PDN (17)
108 //#define PERI_MSDC3_PDN (18)
109
110 #if 0 /* --- by chhung */
111 /* gate means clock power down */
112 static int g_clk_gate = 0;
113 #define msdc_gate_clock(id) \
114 do { \
115 g_clk_gate &= ~(1 << ((id) + PERI_MSDC0_PDN)); \
116 } while (0)
117 /* not like power down register. 1 means clock on. */
118 #define msdc_ungate_clock(id) \
119 do { \
120 g_clk_gate |= 1 << ((id) + PERI_MSDC0_PDN); \
121 } while (0)
122
123 // do we need sync object or not
124 void msdc_clk_status(int *status)
125 {
126 *status = g_clk_gate;
127 }
128 #endif /* end of --- */
129
130 /* +++ by chhung */
131 struct msdc_hw msdc0_hw = {
132 .clk_src = 0,
133 .flags = MSDC_CD_PIN_EN | MSDC_REMOVABLE,
134 // .flags = MSDC_WP_PIN_EN | MSDC_CD_PIN_EN | MSDC_REMOVABLE,
135 };
136
137 /* end of +++ */
138
139 static int msdc_rsp[] = {
140 0, /* RESP_NONE */
141 1, /* RESP_R1 */
142 2, /* RESP_R2 */
143 3, /* RESP_R3 */
144 4, /* RESP_R4 */
145 1, /* RESP_R5 */
146 1, /* RESP_R6 */
147 1, /* RESP_R7 */
148 7, /* RESP_R1b */
149 };
150
151 #define msdc_txfifocnt() ((sdr_read32(MSDC_FIFOCS) & MSDC_FIFOCS_TXCNT) >> 16)
152 #define msdc_rxfifocnt() ((sdr_read32(MSDC_FIFOCS) & MSDC_FIFOCS_RXCNT) >> 0)
153 #define msdc_fifo_write32(v) sdr_write32(MSDC_TXDATA, (v))
154 #define msdc_fifo_write8(v) sdr_write8(MSDC_TXDATA, (v))
155 #define msdc_fifo_read32() sdr_read32(MSDC_RXDATA)
156 #define msdc_fifo_read8() sdr_read8(MSDC_RXDATA)
157
158 #define msdc_dma_on() sdr_clr_bits(MSDC_CFG, MSDC_CFG_PIO)
159
160 #define msdc_retry(expr, retry, cnt) \
161 do { \
162 int backup = cnt; \
163 while (retry) { \
164 if (!(expr)) \
165 break; \
166 if (cnt-- == 0) { \
167 retry--; mdelay(1); cnt = backup; \
168 } \
169 } \
170 WARN_ON(retry == 0); \
171 } while (0)
172
173 static void msdc_reset_hw(struct msdc_host *host)
174 {
175 void __iomem *base = host->base;
176
177 sdr_set_bits(MSDC_CFG, MSDC_CFG_RST);
178 while (sdr_read32(MSDC_CFG) & MSDC_CFG_RST)
179 cpu_relax();
180 }
181
182 #define msdc_clr_int() \
183 do { \
184 volatile u32 val = sdr_read32(MSDC_INT); \
185 sdr_write32(MSDC_INT, val); \
186 } while (0)
187
188 #define msdc_clr_fifo() \
189 do { \
190 int retry = 3, cnt = 1000; \
191 sdr_set_bits(MSDC_FIFOCS, MSDC_FIFOCS_CLR); \
192 msdc_retry(sdr_read32(MSDC_FIFOCS) & MSDC_FIFOCS_CLR, retry, cnt); \
193 } while (0)
194
195 #define msdc_irq_save(val) \
196 do { \
197 val = sdr_read32(MSDC_INTEN); \
198 sdr_clr_bits(MSDC_INTEN, val); \
199 } while (0)
200
201 #define msdc_irq_restore(val) \
202 do { \
203 sdr_set_bits(MSDC_INTEN, val); \
204 } while (0)
205
206 /* clock source for host: global */
207 #if defined(CONFIG_SOC_MT7620)
208 static u32 hclks[] = {48000000}; /* +/- by chhung */
209 #elif defined(CONFIG_SOC_MT7621)
210 static u32 hclks[] = {50000000}; /* +/- by chhung */
211 #endif
212
213 //============================================
214 // the power for msdc host controller: global
215 // always keep the VMC on.
216 //============================================
217 #define msdc_vcore_on(host) \
218 do { \
219 INIT_MSG("[+]VMC ref. count<%d>", ++host->pwr_ref); \
220 (void)hwPowerOn(MT65XX_POWER_LDO_VMC, VOL_3300, "SD"); \
221 } while (0)
222 #define msdc_vcore_off(host) \
223 do { \
224 INIT_MSG("[-]VMC ref. count<%d>", --host->pwr_ref); \
225 (void)hwPowerDown(MT65XX_POWER_LDO_VMC, "SD"); \
226 } while (0)
227
228 //====================================
229 // the vdd output for card: global
230 // always keep the VMCH on.
231 //====================================
232 #define msdc_vdd_on(host) \
233 do { \
234 (void)hwPowerOn(MT65XX_POWER_LDO_VMCH, VOL_3300, "SD"); \
235 } while (0)
236 #define msdc_vdd_off(host) \
237 do { \
238 (void)hwPowerDown(MT65XX_POWER_LDO_VMCH, "SD"); \
239 } while (0)
240
241 #define sdc_is_busy() (sdr_read32(SDC_STS) & SDC_STS_SDCBUSY)
242 #define sdc_is_cmd_busy() (sdr_read32(SDC_STS) & SDC_STS_CMDBUSY)
243
244 #define sdc_send_cmd(cmd, arg) \
245 do { \
246 sdr_write32(SDC_ARG, (arg)); \
247 sdr_write32(SDC_CMD, (cmd)); \
248 } while (0)
249
250 // can modify to read h/w register.
251 //#define is_card_present(h) ((sdr_read32(MSDC_PS) & MSDC_PS_CDSTS) ? 0 : 1);
252 #define is_card_present(h) (((struct msdc_host *)(h))->card_inserted)
253
254 /* +++ by chhung */
255 #ifndef __ASSEMBLY__
256 #define PHYSADDR(a) (((unsigned long)(a)) & 0x1fffffff)
257 #else
258 #define PHYSADDR(a) ((a) & 0x1fffffff)
259 #endif
260 /* end of +++ */
261 static unsigned int msdc_do_command(struct msdc_host *host,
262 struct mmc_command *cmd,
263 int tune,
264 unsigned long timeout);
265
266 static int msdc_tune_cmdrsp(struct msdc_host *host, struct mmc_command *cmd);
267
268 #ifdef MT6575_SD_DEBUG
269 static void msdc_dump_card_status(struct msdc_host *host, u32 status)
270 {
271 /* N_MSG is currently a no-op */
272 #if 0
273 static char *state[] = {
274 "Idle", /* 0 */
275 "Ready", /* 1 */
276 "Ident", /* 2 */
277 "Stby", /* 3 */
278 "Tran", /* 4 */
279 "Data", /* 5 */
280 "Rcv", /* 6 */
281 "Prg", /* 7 */
282 "Dis", /* 8 */
283 "Reserved", /* 9 */
284 "Reserved", /* 10 */
285 "Reserved", /* 11 */
286 "Reserved", /* 12 */
287 "Reserved", /* 13 */
288 "Reserved", /* 14 */
289 "I/O mode", /* 15 */
290 };
291 #endif
292 if (status & R1_OUT_OF_RANGE)
293 N_MSG(RSP, "[CARD_STATUS] Out of Range");
294 if (status & R1_ADDRESS_ERROR)
295 N_MSG(RSP, "[CARD_STATUS] Address Error");
296 if (status & R1_BLOCK_LEN_ERROR)
297 N_MSG(RSP, "[CARD_STATUS] Block Len Error");
298 if (status & R1_ERASE_SEQ_ERROR)
299 N_MSG(RSP, "[CARD_STATUS] Erase Seq Error");
300 if (status & R1_ERASE_PARAM)
301 N_MSG(RSP, "[CARD_STATUS] Erase Param");
302 if (status & R1_WP_VIOLATION)
303 N_MSG(RSP, "[CARD_STATUS] WP Violation");
304 if (status & R1_CARD_IS_LOCKED)
305 N_MSG(RSP, "[CARD_STATUS] Card is Locked");
306 if (status & R1_LOCK_UNLOCK_FAILED)
307 N_MSG(RSP, "[CARD_STATUS] Lock/Unlock Failed");
308 if (status & R1_COM_CRC_ERROR)
309 N_MSG(RSP, "[CARD_STATUS] Command CRC Error");
310 if (status & R1_ILLEGAL_COMMAND)
311 N_MSG(RSP, "[CARD_STATUS] Illegal Command");
312 if (status & R1_CARD_ECC_FAILED)
313 N_MSG(RSP, "[CARD_STATUS] Card ECC Failed");
314 if (status & R1_CC_ERROR)
315 N_MSG(RSP, "[CARD_STATUS] CC Error");
316 if (status & R1_ERROR)
317 N_MSG(RSP, "[CARD_STATUS] Error");
318 if (status & R1_UNDERRUN)
319 N_MSG(RSP, "[CARD_STATUS] Underrun");
320 if (status & R1_OVERRUN)
321 N_MSG(RSP, "[CARD_STATUS] Overrun");
322 if (status & R1_CID_CSD_OVERWRITE)
323 N_MSG(RSP, "[CARD_STATUS] CID/CSD Overwrite");
324 if (status & R1_WP_ERASE_SKIP)
325 N_MSG(RSP, "[CARD_STATUS] WP Eraser Skip");
326 if (status & R1_CARD_ECC_DISABLED)
327 N_MSG(RSP, "[CARD_STATUS] Card ECC Disabled");
328 if (status & R1_ERASE_RESET)
329 N_MSG(RSP, "[CARD_STATUS] Erase Reset");
330 if (status & R1_READY_FOR_DATA)
331 N_MSG(RSP, "[CARD_STATUS] Ready for Data");
332 if (status & R1_SWITCH_ERROR)
333 N_MSG(RSP, "[CARD_STATUS] Switch error");
334 if (status & R1_APP_CMD)
335 N_MSG(RSP, "[CARD_STATUS] App Command");
336
337 N_MSG(RSP, "[CARD_STATUS] '%s' State", state[R1_CURRENT_STATE(status)]);
338 }
339
340 static void msdc_dump_ocr_reg(struct msdc_host *host, u32 resp)
341 {
342 if (resp & (1 << 7))
343 N_MSG(RSP, "[OCR] Low Voltage Range");
344 if (resp & (1 << 15))
345 N_MSG(RSP, "[OCR] 2.7-2.8 volt");
346 if (resp & (1 << 16))
347 N_MSG(RSP, "[OCR] 2.8-2.9 volt");
348 if (resp & (1 << 17))
349 N_MSG(RSP, "[OCR] 2.9-3.0 volt");
350 if (resp & (1 << 18))
351 N_MSG(RSP, "[OCR] 3.0-3.1 volt");
352 if (resp & (1 << 19))
353 N_MSG(RSP, "[OCR] 3.1-3.2 volt");
354 if (resp & (1 << 20))
355 N_MSG(RSP, "[OCR] 3.2-3.3 volt");
356 if (resp & (1 << 21))
357 N_MSG(RSP, "[OCR] 3.3-3.4 volt");
358 if (resp & (1 << 22))
359 N_MSG(RSP, "[OCR] 3.4-3.5 volt");
360 if (resp & (1 << 23))
361 N_MSG(RSP, "[OCR] 3.5-3.6 volt");
362 if (resp & (1 << 24))
363 N_MSG(RSP, "[OCR] Switching to 1.8V Accepted (S18A)");
364 if (resp & (1 << 30))
365 N_MSG(RSP, "[OCR] Card Capacity Status (CCS)");
366 if (resp & (1 << 31))
367 N_MSG(RSP, "[OCR] Card Power Up Status (Idle)");
368 else
369 N_MSG(RSP, "[OCR] Card Power Up Status (Busy)");
370 }
371
372 static void msdc_dump_rca_resp(struct msdc_host *host, u32 resp)
373 {
374 u32 status = (((resp >> 15) & 0x1) << 23) |
375 (((resp >> 14) & 0x1) << 22) |
376 (((resp >> 13) & 0x1) << 19) |
377 (resp & 0x1fff);
378
379 N_MSG(RSP, "[RCA] 0x%.4x", resp >> 16);
380 msdc_dump_card_status(host, status);
381 }
382
383 static void msdc_dump_io_resp(struct msdc_host *host, u32 resp)
384 {
385 u32 flags = (resp >> 8) & 0xFF;
386 #if 0
387 char *state[] = {"DIS", "CMD", "TRN", "RFU"};
388 #endif
389 if (flags & (1 << 7))
390 N_MSG(RSP, "[IO] COM_CRC_ERR");
391 if (flags & (1 << 6))
392 N_MSG(RSP, "[IO] Illgal command");
393 if (flags & (1 << 3))
394 N_MSG(RSP, "[IO] Error");
395 if (flags & (1 << 2))
396 N_MSG(RSP, "[IO] RFU");
397 if (flags & (1 << 1))
398 N_MSG(RSP, "[IO] Function number error");
399 if (flags & (1 << 0))
400 N_MSG(RSP, "[IO] Out of range");
401
402 N_MSG(RSP, "[IO] State: %s, Data:0x%x", state[(resp >> 12) & 0x3], resp & 0xFF);
403 }
404 #endif
405
406 static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks)
407 {
408 void __iomem *base = host->base;
409 u32 timeout, clk_ns;
410
411 host->timeout_ns = ns;
412 host->timeout_clks = clks;
413
414 clk_ns = 1000000000UL / host->sclk;
415 timeout = ns / clk_ns + clks;
416 timeout = timeout >> 16; /* in 65536 sclk cycle unit */
417 timeout = timeout > 1 ? timeout - 1 : 0;
418 timeout = timeout > 255 ? 255 : timeout;
419
420 sdr_set_field(SDC_CFG, SDC_CFG_DTOC, timeout);
421
422 N_MSG(OPS, "Set read data timeout: %dns %dclks -> %d x 65536 cycles",
423 ns, clks, timeout + 1);
424 }
425
426 static void msdc_tasklet_card(struct work_struct *work)
427 {
428 struct msdc_host *host = (struct msdc_host *)container_of(work,
429 struct msdc_host, card_delaywork.work);
430 void __iomem *base = host->base;
431 u32 inserted;
432 u32 status = 0;
433 //u32 change = 0;
434
435 spin_lock(&host->lock);
436
437 status = sdr_read32(MSDC_PS);
438 if (cd_active_low)
439 inserted = (status & MSDC_PS_CDSTS) ? 0 : 1;
440 else
441 inserted = (status & MSDC_PS_CDSTS) ? 1 : 0;
442
443 #if 0
444 change = host->card_inserted ^ inserted;
445 host->card_inserted = inserted;
446
447 if (change && !host->suspend) {
448 if (inserted)
449 host->mmc->f_max = HOST_MAX_MCLK; // work around
450 mmc_detect_change(host->mmc, msecs_to_jiffies(20));
451 }
452 #else /* Make sure: handle the last interrupt */
453 host->card_inserted = inserted;
454
455 if (!host->suspend) {
456 host->mmc->f_max = HOST_MAX_MCLK;
457 mmc_detect_change(host->mmc, msecs_to_jiffies(20));
458 }
459
460 IRQ_MSG("card found<%s>", inserted ? "inserted" : "removed");
461 #endif
462
463 spin_unlock(&host->lock);
464 }
465
466 #if 0 /* --- by chhung */
467 /* For E2 only */
468 static u8 clk_src_bit[4] = {
469 0, 3, 5, 7
470 };
471
472 static void msdc_select_clksrc(struct msdc_host *host, unsigned char clksrc)
473 {
474 u32 val;
475 void __iomem *base = host->base;
476
477 BUG_ON(clksrc > 3);
478 INIT_MSG("set clock source to <%d>", clksrc);
479
480 val = sdr_read32(MSDC_CLKSRC_REG);
481 if (sdr_read32(MSDC_ECO_VER) >= 4) {
482 val &= ~(0x3 << clk_src_bit[host->id]);
483 val |= clksrc << clk_src_bit[host->id];
484 } else {
485 val &= ~0x3; val |= clksrc;
486 }
487 sdr_write32(MSDC_CLKSRC_REG, val);
488
489 host->hclk = hclks[clksrc];
490 host->hw->clk_src = clksrc;
491 }
492 #endif /* end of --- */
493
494 static void msdc_set_mclk(struct msdc_host *host, int ddr, unsigned int hz)
495 {
496 //struct msdc_hw *hw = host->hw;
497 void __iomem *base = host->base;
498 u32 mode;
499 u32 flags;
500 u32 div;
501 u32 sclk;
502 u32 hclk = host->hclk;
503 //u8 clksrc = hw->clk_src;
504
505 if (!hz) { // set mmc system clock to 0 ?
506 //ERR_MSG("set mclk to 0!!!");
507 msdc_reset_hw(host);
508 return;
509 }
510
511 msdc_irq_save(flags);
512
513 if (ddr) {
514 mode = 0x2; /* ddr mode and use divisor */
515 if (hz >= (hclk >> 2)) {
516 div = 1; /* mean div = 1/4 */
517 sclk = hclk >> 2; /* sclk = clk / 4 */
518 } else {
519 div = (hclk + ((hz << 2) - 1)) / (hz << 2);
520 sclk = (hclk >> 2) / div;
521 }
522 } else if (hz >= hclk) { /* bug fix */
523 mode = 0x1; /* no divisor and divisor is ignored */
524 div = 0;
525 sclk = hclk;
526 } else {
527 mode = 0x0; /* use divisor */
528 if (hz >= (hclk >> 1)) {
529 div = 0; /* mean div = 1/2 */
530 sclk = hclk >> 1; /* sclk = clk / 2 */
531 } else {
532 div = (hclk + ((hz << 2) - 1)) / (hz << 2);
533 sclk = (hclk >> 2) / div;
534 }
535 }
536
537 /* set clock mode and divisor */
538 sdr_set_field(MSDC_CFG, MSDC_CFG_CKMOD, mode);
539 sdr_set_field(MSDC_CFG, MSDC_CFG_CKDIV, div);
540
541 /* wait clock stable */
542 while (!(sdr_read32(MSDC_CFG) & MSDC_CFG_CKSTB))
543 cpu_relax();
544
545 host->sclk = sclk;
546 host->mclk = hz;
547 msdc_set_timeout(host, host->timeout_ns, host->timeout_clks); // need?
548
549 INIT_MSG("================");
550 INIT_MSG("!!! Set<%dKHz> Source<%dKHz> -> sclk<%dKHz>", hz / 1000, hclk / 1000, sclk / 1000);
551 INIT_MSG("================");
552
553 msdc_irq_restore(flags);
554 }
555
556 /* Fix me. when need to abort */
557 static void msdc_abort_data(struct msdc_host *host)
558 {
559 void __iomem *base = host->base;
560 struct mmc_command *stop = host->mrq->stop;
561
562 ERR_MSG("Need to Abort.");
563
564 msdc_reset_hw(host);
565 msdc_clr_fifo();
566 msdc_clr_int();
567
568 // need to check FIFO count 0 ?
569
570 if (stop) { /* try to stop, but may not success */
571 ERR_MSG("stop when abort CMD<%d>", stop->opcode);
572 (void)msdc_do_command(host, stop, 0, CMD_TIMEOUT);
573 }
574
575 //if (host->mclk >= 25000000) {
576 // msdc_set_mclk(host, 0, host->mclk >> 1);
577 //}
578 }
579
580 #if 0 /* --- by chhung */
581 static void msdc_pin_config(struct msdc_host *host, int mode)
582 {
583 struct msdc_hw *hw = host->hw;
584 void __iomem *base = host->base;
585 int pull = (mode == MSDC_PIN_PULL_UP) ? GPIO_PULL_UP : GPIO_PULL_DOWN;
586
587 /* Config WP pin */
588 if (hw->flags & MSDC_WP_PIN_EN) {
589 if (hw->config_gpio_pin) /* NULL */
590 hw->config_gpio_pin(MSDC_WP_PIN, pull);
591 }
592
593 switch (mode) {
594 case MSDC_PIN_PULL_UP:
595 //sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKPU, 1); /* Check & FIXME */
596 //sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKPD, 0); /* Check & FIXME */
597 sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDPU, 1);
598 sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDPD, 0);
599 sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATPU, 1);
600 sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATPD, 0);
601 break;
602 case MSDC_PIN_PULL_DOWN:
603 //sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKPU, 0); /* Check & FIXME */
604 //sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKPD, 1); /* Check & FIXME */
605 sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDPU, 0);
606 sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDPD, 1);
607 sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATPU, 0);
608 sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATPD, 1);
609 break;
610 case MSDC_PIN_PULL_NONE:
611 default:
612 //sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKPU, 0); /* Check & FIXME */
613 //sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKPD, 0); /* Check & FIXME */
614 sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDPU, 0);
615 sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDPD, 0);
616 sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATPU, 0);
617 sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATPD, 0);
618 break;
619 }
620
621 N_MSG(CFG, "Pins mode(%d), down(%d), up(%d)",
622 mode, MSDC_PIN_PULL_DOWN, MSDC_PIN_PULL_UP);
623 }
624
625 void msdc_pin_reset(struct msdc_host *host, int mode)
626 {
627 struct msdc_hw *hw = (struct msdc_hw *)host->hw;
628 void __iomem *base = host->base;
629 int pull = (mode == MSDC_PIN_PULL_UP) ? GPIO_PULL_UP : GPIO_PULL_DOWN;
630
631 /* Config reset pin */
632 if (hw->flags & MSDC_RST_PIN_EN) {
633 if (hw->config_gpio_pin) /* NULL */
634 hw->config_gpio_pin(MSDC_RST_PIN, pull);
635
636 if (mode == MSDC_PIN_PULL_UP)
637 sdr_clr_bits(EMMC_IOCON, EMMC_IOCON_BOOTRST);
638 else
639 sdr_set_bits(EMMC_IOCON, EMMC_IOCON_BOOTRST);
640 }
641 }
642
643 static void msdc_core_power(struct msdc_host *host, int on)
644 {
645 N_MSG(CFG, "Turn %s %s power (copower: %d -> %d)",
646 on ? "on" : "off", "core", host->core_power, on);
647
648 if (on && host->core_power == 0) {
649 msdc_vcore_on(host);
650 host->core_power = 1;
651 msleep(1);
652 } else if (!on && host->core_power == 1) {
653 msdc_vcore_off(host);
654 host->core_power = 0;
655 msleep(1);
656 }
657 }
658
659 static void msdc_host_power(struct msdc_host *host, int on)
660 {
661 N_MSG(CFG, "Turn %s %s power ", on ? "on" : "off", "host");
662
663 if (on) {
664 //msdc_core_power(host, 1); // need do card detection.
665 msdc_pin_reset(host, MSDC_PIN_PULL_UP);
666 } else {
667 msdc_pin_reset(host, MSDC_PIN_PULL_DOWN);
668 //msdc_core_power(host, 0);
669 }
670 }
671
672 static void msdc_card_power(struct msdc_host *host, int on)
673 {
674 N_MSG(CFG, "Turn %s %s power ", on ? "on" : "off", "card");
675
676 if (on) {
677 msdc_pin_config(host, MSDC_PIN_PULL_UP);
678 //msdc_vdd_on(host); // need todo card detection.
679 msleep(1);
680 } else {
681 //msdc_vdd_off(host);
682 msdc_pin_config(host, MSDC_PIN_PULL_DOWN);
683 msleep(1);
684 }
685 }
686
687 static void msdc_set_power_mode(struct msdc_host *host, u8 mode)
688 {
689 N_MSG(CFG, "Set power mode(%d)", mode);
690
691 if (host->power_mode == MMC_POWER_OFF && mode != MMC_POWER_OFF) {
692 msdc_host_power(host, 1);
693 msdc_card_power(host, 1);
694 } else if (host->power_mode != MMC_POWER_OFF && mode == MMC_POWER_OFF) {
695 msdc_card_power(host, 0);
696 msdc_host_power(host, 0);
697 }
698 host->power_mode = mode;
699 }
700 #endif /* end of --- */
701
702 #ifdef CONFIG_PM
703 /*
704 register as callback function of WIFI(combo_sdio_register_pm) .
705 can called by msdc_drv_suspend/resume too.
706 */
707 static void msdc_pm(pm_message_t state, void *data)
708 {
709 struct msdc_host *host = (struct msdc_host *)data;
710 int evt = state.event;
711
712 if (evt == PM_EVENT_USER_RESUME || evt == PM_EVENT_USER_SUSPEND) {
713 INIT_MSG("USR_%s: suspend<%d> power<%d>",
714 evt == PM_EVENT_USER_RESUME ? "EVENT_USER_RESUME" : "EVENT_USER_SUSPEND",
715 host->suspend, host->power_mode);
716 }
717
718 if (evt == PM_EVENT_SUSPEND || evt == PM_EVENT_USER_SUSPEND) {
719 if (host->suspend) /* already suspend */ /* default 0*/
720 return;
721
722 /* for memory card. already power off by mmc */
723 if (evt == PM_EVENT_SUSPEND && host->power_mode == MMC_POWER_OFF)
724 return;
725
726 host->suspend = 1;
727 host->pm_state = state; /* default PMSG_RESUME */
728
729 } else if (evt == PM_EVENT_RESUME || evt == PM_EVENT_USER_RESUME) {
730 if (!host->suspend) {
731 //ERR_MSG("warning: already resume");
732 return;
733 }
734
735 /* No PM resume when USR suspend */
736 if (evt == PM_EVENT_RESUME && host->pm_state.event == PM_EVENT_USER_SUSPEND) {
737 ERR_MSG("PM Resume when in USR Suspend"); /* won't happen. */
738 return;
739 }
740
741 host->suspend = 0;
742 host->pm_state = state;
743
744 }
745 }
746 #endif
747
748 /*--------------------------------------------------------------------------*/
749 /* mmc_host_ops members */
750 /*--------------------------------------------------------------------------*/
751 static unsigned int msdc_command_start(struct msdc_host *host,
752 struct mmc_command *cmd,
753 int tune, /* not used */
754 unsigned long timeout)
755 {
756 void __iomem *base = host->base;
757 u32 opcode = cmd->opcode;
758 u32 rawcmd;
759 u32 wints = MSDC_INT_CMDRDY | MSDC_INT_RSPCRCERR | MSDC_INT_CMDTMO |
760 MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR | MSDC_INT_ACMDTMO |
761 MSDC_INT_ACMD19_DONE;
762
763 u32 resp;
764 unsigned long tmo;
765
766 /* Protocol layer does not provide response type, but our hardware needs
767 * to know exact type, not just size!
768 */
769 if (opcode == MMC_SEND_OP_COND || opcode == SD_APP_OP_COND) {
770 resp = RESP_R3;
771 } else if (opcode == MMC_SET_RELATIVE_ADDR) {
772 resp = (mmc_cmd_type(cmd) == MMC_CMD_BCR) ? RESP_R6 : RESP_R1;
773 } else if (opcode == MMC_FAST_IO) {
774 resp = RESP_R4;
775 } else if (opcode == MMC_GO_IRQ_STATE) {
776 resp = RESP_R5;
777 } else if (opcode == MMC_SELECT_CARD) {
778 resp = (cmd->arg != 0) ? RESP_R1B : RESP_NONE;
779 } else if (opcode == SD_IO_RW_DIRECT || opcode == SD_IO_RW_EXTENDED) {
780 resp = RESP_R1; /* SDIO workaround. */
781 } else if (opcode == SD_SEND_IF_COND && (mmc_cmd_type(cmd) == MMC_CMD_BCR)) {
782 resp = RESP_R1;
783 } else {
784 switch (mmc_resp_type(cmd)) {
785 case MMC_RSP_R1:
786 resp = RESP_R1;
787 break;
788 case MMC_RSP_R1B:
789 resp = RESP_R1B;
790 break;
791 case MMC_RSP_R2:
792 resp = RESP_R2;
793 break;
794 case MMC_RSP_R3:
795 resp = RESP_R3;
796 break;
797 case MMC_RSP_NONE:
798 default:
799 resp = RESP_NONE;
800 break;
801 }
802 }
803
804 cmd->error = 0;
805 /* rawcmd :
806 * vol_swt << 30 | auto_cmd << 28 | blklen << 16 | go_irq << 15 |
807 * stop << 14 | rw << 13 | dtype << 11 | rsptyp << 7 | brk << 6 | opcode
808 */
809 rawcmd = opcode | msdc_rsp[resp] << 7 | host->blksz << 16;
810
811 if (opcode == MMC_READ_MULTIPLE_BLOCK) {
812 rawcmd |= (2 << 11);
813 } else if (opcode == MMC_READ_SINGLE_BLOCK) {
814 rawcmd |= (1 << 11);
815 } else if (opcode == MMC_WRITE_MULTIPLE_BLOCK) {
816 rawcmd |= ((2 << 11) | (1 << 13));
817 } else if (opcode == MMC_WRITE_BLOCK) {
818 rawcmd |= ((1 << 11) | (1 << 13));
819 } else if (opcode == SD_IO_RW_EXTENDED) {
820 if (cmd->data->flags & MMC_DATA_WRITE)
821 rawcmd |= (1 << 13);
822 if (cmd->data->blocks > 1)
823 rawcmd |= (2 << 11);
824 else
825 rawcmd |= (1 << 11);
826 } else if (opcode == SD_IO_RW_DIRECT && cmd->flags == (unsigned int)-1) {
827 rawcmd |= (1 << 14);
828 } else if ((opcode == SD_APP_SEND_SCR) ||
829 (opcode == SD_APP_SEND_NUM_WR_BLKS) ||
830 (opcode == SD_SWITCH && (mmc_cmd_type(cmd) == MMC_CMD_ADTC)) ||
831 (opcode == SD_APP_SD_STATUS && (mmc_cmd_type(cmd) == MMC_CMD_ADTC)) ||
832 (opcode == MMC_SEND_EXT_CSD && (mmc_cmd_type(cmd) == MMC_CMD_ADTC))) {
833 rawcmd |= (1 << 11);
834 } else if (opcode == MMC_STOP_TRANSMISSION) {
835 rawcmd |= (1 << 14);
836 rawcmd &= ~(0x0FFF << 16);
837 }
838
839 N_MSG(CMD, "CMD<%d><0x%.8x> Arg<0x%.8x>", opcode, rawcmd, cmd->arg);
840
841 tmo = jiffies + timeout;
842
843 if (opcode == MMC_SEND_STATUS) {
844 for (;;) {
845 if (!sdc_is_cmd_busy())
846 break;
847
848 if (time_after(jiffies, tmo)) {
849 ERR_MSG("XXX cmd_busy timeout: before CMD<%d>", opcode);
850 cmd->error = -ETIMEDOUT;
851 msdc_reset_hw(host);
852 goto end;
853 }
854 }
855 } else {
856 for (;;) {
857 if (!sdc_is_busy())
858 break;
859 if (time_after(jiffies, tmo)) {
860 ERR_MSG("XXX sdc_busy timeout: before CMD<%d>", opcode);
861 cmd->error = -ETIMEDOUT;
862 msdc_reset_hw(host);
863 goto end;
864 }
865 }
866 }
867
868 //BUG_ON(in_interrupt());
869 host->cmd = cmd;
870 host->cmd_rsp = resp;
871
872 init_completion(&host->cmd_done);
873
874 sdr_set_bits(MSDC_INTEN, wints);
875 sdc_send_cmd(rawcmd, cmd->arg);
876
877 end:
878 return cmd->error;
879 }
880
881 static unsigned int msdc_command_resp(struct msdc_host *host,
882 struct mmc_command *cmd,
883 int tune,
884 unsigned long timeout)
885 __must_hold(&host->lock)
886 {
887 void __iomem *base = host->base;
888 u32 opcode = cmd->opcode;
889 //u32 rawcmd;
890 u32 resp;
891 u32 wints = MSDC_INT_CMDRDY | MSDC_INT_RSPCRCERR | MSDC_INT_CMDTMO |
892 MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR | MSDC_INT_ACMDTMO |
893 MSDC_INT_ACMD19_DONE;
894
895 resp = host->cmd_rsp;
896
897 BUG_ON(in_interrupt());
898 //init_completion(&host->cmd_done);
899 //sdr_set_bits(MSDC_INTEN, wints);
900
901 spin_unlock(&host->lock);
902 if (!wait_for_completion_timeout(&host->cmd_done, 10 * timeout)) {
903 ERR_MSG("XXX CMD<%d> wait_for_completion timeout ARG<0x%.8x>", opcode, cmd->arg);
904 cmd->error = -ETIMEDOUT;
905 msdc_reset_hw(host);
906 }
907 spin_lock(&host->lock);
908
909 sdr_clr_bits(MSDC_INTEN, wints);
910 host->cmd = NULL;
911
912 //end:
913 #ifdef MT6575_SD_DEBUG
914 switch (resp) {
915 case RESP_NONE:
916 N_MSG(RSP, "CMD_RSP(%d): %d RSP(%d)", opcode, cmd->error, resp);
917 break;
918 case RESP_R2:
919 N_MSG(RSP, "CMD_RSP(%d): %d RSP(%d)= %.8x %.8x %.8x %.8x",
920 opcode, cmd->error, resp, cmd->resp[0], cmd->resp[1],
921 cmd->resp[2], cmd->resp[3]);
922 break;
923 default: /* Response types 1, 3, 4, 5, 6, 7(1b) */
924 N_MSG(RSP, "CMD_RSP(%d): %d RSP(%d)= 0x%.8x",
925 opcode, cmd->error, resp, cmd->resp[0]);
926 if (cmd->error == 0) {
927 switch (resp) {
928 case RESP_R1:
929 case RESP_R1B:
930 msdc_dump_card_status(host, cmd->resp[0]);
931 break;
932 case RESP_R3:
933 msdc_dump_ocr_reg(host, cmd->resp[0]);
934 break;
935 case RESP_R5:
936 msdc_dump_io_resp(host, cmd->resp[0]);
937 break;
938 case RESP_R6:
939 msdc_dump_rca_resp(host, cmd->resp[0]);
940 break;
941 }
942 }
943 break;
944 }
945 #endif
946
947 /* do we need to save card's RCA when SD_SEND_RELATIVE_ADDR */
948
949 if (!tune)
950 return cmd->error;
951
952 /* memory card CRC */
953 if (host->hw->flags & MSDC_REMOVABLE && cmd->error == -EIO) {
954 if (sdr_read32(SDC_CMD) & 0x1800) { /* check if has data phase */
955 msdc_abort_data(host);
956 } else {
957 /* do basic: reset*/
958 msdc_reset_hw(host);
959 msdc_clr_fifo();
960 msdc_clr_int();
961 }
962 cmd->error = msdc_tune_cmdrsp(host, cmd);
963 }
964
965 // check DAT0
966 /* if (resp == RESP_R1B) {
967 while ((sdr_read32(MSDC_PS) & 0x10000) != 0x10000);
968 } */
969 /* CMD12 Error Handle */
970
971 return cmd->error;
972 }
973
974 static unsigned int msdc_do_command(struct msdc_host *host,
975 struct mmc_command *cmd,
976 int tune,
977 unsigned long timeout)
978 {
979 if (msdc_command_start(host, cmd, tune, timeout))
980 goto end;
981
982 if (msdc_command_resp(host, cmd, tune, timeout))
983 goto end;
984
985 end:
986
987 N_MSG(CMD, " return<%d> resp<0x%.8x>", cmd->error, cmd->resp[0]);
988 return cmd->error;
989 }
990
991 #if 0 /* --- by chhung */
992 // DMA resume / start / stop
993 static void msdc_dma_resume(struct msdc_host *host)
994 {
995 void __iomem *base = host->base;
996
997 sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_RESUME, 1);
998
999 N_MSG(DMA, "DMA resume");
1000 }
1001 #endif /* end of --- */
1002
1003 static void msdc_dma_start(struct msdc_host *host)
1004 {
1005 void __iomem *base = host->base;
1006 u32 wints = MSDC_INTEN_XFER_COMPL | MSDC_INTEN_DATTMO | MSDC_INTEN_DATCRCERR;
1007
1008 sdr_set_bits(MSDC_INTEN, wints);
1009 //dsb(); /* --- by chhung */
1010 sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_START, 1);
1011
1012 N_MSG(DMA, "DMA start");
1013 }
1014
1015 static void msdc_dma_stop(struct msdc_host *host)
1016 {
1017 void __iomem *base = host->base;
1018 //u32 retries=500;
1019 u32 wints = MSDC_INTEN_XFER_COMPL | MSDC_INTEN_DATTMO | MSDC_INTEN_DATCRCERR;
1020
1021 N_MSG(DMA, "DMA status: 0x%.8x", sdr_read32(MSDC_DMA_CFG));
1022 //while (sdr_read32(MSDC_DMA_CFG) & MSDC_DMA_CFG_STS);
1023
1024 sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP, 1);
1025 while (sdr_read32(MSDC_DMA_CFG) & MSDC_DMA_CFG_STS)
1026 ;
1027
1028 //dsb(); /* --- by chhung */
1029 sdr_clr_bits(MSDC_INTEN, wints); /* Not just xfer_comp */
1030
1031 N_MSG(DMA, "DMA stop");
1032 }
1033
1034 /* calc checksum */
1035 static u8 msdc_dma_calcs(u8 *buf, u32 len)
1036 {
1037 u32 i, sum = 0;
1038
1039 for (i = 0; i < len; i++)
1040 sum += buf[i];
1041 return 0xFF - (u8)sum;
1042 }
1043
1044 /* gpd bd setup + dma registers */
1045 static void msdc_dma_config(struct msdc_host *host, struct msdc_dma *dma)
1046 {
1047 void __iomem *base = host->base;
1048 //u32 i, j, num, bdlen, arg, xfersz;
1049 u32 j, num;
1050 struct scatterlist *sg;
1051 struct gpd *gpd;
1052 struct bd *bd;
1053
1054 switch (dma->mode) {
1055 case MSDC_MODE_DMA_BASIC:
1056 BUG_ON(host->xfer_size > 65535);
1057 BUG_ON(dma->sglen != 1);
1058 sdr_write32(MSDC_DMA_SA, PHYSADDR(sg_dma_address(sg)));
1059 sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_LASTBUF, 1);
1060 //#if defined (CONFIG_RALINK_MT7620)
1061 if (ralink_soc == MT762X_SOC_MT7620A)
1062 sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_XFERSZ, sg_dma_len(sg));
1063 //#elif defined (CONFIG_RALINK_MT7621) || defined (CONFIG_RALINK_MT7628)
1064 else
1065 sdr_write32((void __iomem *)(RALINK_MSDC_BASE + 0xa8), sg_dma_len(sg));
1066 //#endif
1067 sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_BRUSTSZ,
1068 MSDC_BRUST_64B);
1069 sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_MODE, 0);
1070 break;
1071 case MSDC_MODE_DMA_DESC:
1072
1073 /* calculate the required number of gpd */
1074 num = (dma->sglen + MAX_BD_PER_GPD - 1) / MAX_BD_PER_GPD;
1075 BUG_ON(num != 1);
1076
1077 gpd = dma->gpd;
1078 bd = dma->bd;
1079
1080 /* modify gpd*/
1081 //gpd->intr = 0;
1082 gpd->hwo = 1; /* hw will clear it */
1083 gpd->bdp = 1;
1084 gpd->chksum = 0; /* need to clear first. */
1085 gpd->chksum = msdc_dma_calcs((u8 *)gpd, 16);
1086
1087 /* modify bd*/
1088 for_each_sg(dma->sg, sg, dma->sglen, j) {
1089 bd[j].blkpad = 0;
1090 bd[j].dwpad = 0;
1091 bd[j].ptr = (void *)sg_dma_address(sg);
1092 bd[j].buflen = sg_dma_len(sg);
1093
1094 if (j == dma->sglen - 1)
1095 bd[j].eol = 1; /* the last bd */
1096 else
1097 bd[j].eol = 0;
1098
1099 bd[j].chksum = 0; /* checksume need to clear first */
1100 bd[j].chksum = msdc_dma_calcs((u8 *)(&bd[j]), 16);
1101 }
1102
1103 sdr_set_field(MSDC_DMA_CFG, MSDC_DMA_CFG_DECSEN, 1);
1104 sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_BRUSTSZ,
1105 MSDC_BRUST_64B);
1106 sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_MODE, 1);
1107
1108 sdr_write32(MSDC_DMA_SA, PHYSADDR((u32)dma->gpd_addr));
1109 break;
1110
1111 default:
1112 break;
1113 }
1114
1115 N_MSG(DMA, "DMA_CTRL = 0x%x", sdr_read32(MSDC_DMA_CTRL));
1116 N_MSG(DMA, "DMA_CFG = 0x%x", sdr_read32(MSDC_DMA_CFG));
1117 N_MSG(DMA, "DMA_SA = 0x%x", sdr_read32(MSDC_DMA_SA));
1118
1119 }
1120
1121 static void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma,
1122 struct scatterlist *sg, unsigned int sglen)
1123 {
1124 BUG_ON(sglen > MAX_BD_NUM); /* not support currently */
1125
1126 dma->sg = sg;
1127 dma->sglen = sglen;
1128
1129 dma->mode = MSDC_MODE_DMA_DESC;
1130
1131 N_MSG(DMA, "DMA mode<%d> sglen<%d> xfersz<%d>", dma->mode, dma->sglen,
1132 host->xfer_size);
1133
1134 msdc_dma_config(host, dma);
1135 }
1136
1137 static int msdc_do_request(struct mmc_host *mmc, struct mmc_request *mrq)
1138 __must_hold(&host->lock)
1139 {
1140 struct msdc_host *host = mmc_priv(mmc);
1141 struct mmc_command *cmd;
1142 struct mmc_data *data;
1143 void __iomem *base = host->base;
1144 //u32 intsts = 0;
1145 int read = 1, send_type = 0;
1146
1147 #define SND_DAT 0
1148 #define SND_CMD 1
1149
1150 BUG_ON(mmc == NULL);
1151 BUG_ON(mrq == NULL);
1152
1153 host->error = 0;
1154
1155 cmd = mrq->cmd;
1156 data = mrq->cmd->data;
1157
1158 #if 0 /* --- by chhung */
1159 //if(host->id ==1){
1160 N_MSG(OPS, "enable clock!");
1161 msdc_ungate_clock(host->id);
1162 //}
1163 #endif /* end of --- */
1164
1165 if (!data) {
1166 send_type = SND_CMD;
1167 if (msdc_do_command(host, cmd, 1, CMD_TIMEOUT) != 0)
1168 goto done;
1169 } else {
1170 BUG_ON(data->blksz > HOST_MAX_BLKSZ);
1171 send_type = SND_DAT;
1172
1173 data->error = 0;
1174 read = data->flags & MMC_DATA_READ ? 1 : 0;
1175 host->data = data;
1176 host->xfer_size = data->blocks * data->blksz;
1177 host->blksz = data->blksz;
1178
1179 if (read) {
1180 if ((host->timeout_ns != data->timeout_ns) ||
1181 (host->timeout_clks != data->timeout_clks)) {
1182 msdc_set_timeout(host, data->timeout_ns, data->timeout_clks);
1183 }
1184 }
1185
1186 sdr_write32(SDC_BLK_NUM, data->blocks);
1187 //msdc_clr_fifo(); /* no need */
1188
1189 msdc_dma_on(); /* enable DMA mode first!! */
1190 init_completion(&host->xfer_done);
1191
1192 /* start the command first*/
1193 if (msdc_command_start(host, cmd, 1, CMD_TIMEOUT) != 0)
1194 goto done;
1195
1196 data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
1197 data->sg_len,
1198 mmc_get_dma_dir(data));
1199 msdc_dma_setup(host, &host->dma, data->sg,
1200 data->sg_count);
1201
1202 /* then wait command done */
1203 if (msdc_command_resp(host, cmd, 1, CMD_TIMEOUT) != 0)
1204 goto done;
1205
1206 /* for read, the data coming too fast, then CRC error
1207 start DMA no business with CRC. */
1208 //init_completion(&host->xfer_done);
1209 msdc_dma_start(host);
1210
1211 spin_unlock(&host->lock);
1212 if (!wait_for_completion_timeout(&host->xfer_done, DAT_TIMEOUT)) {
1213 ERR_MSG("XXX CMD<%d> wait xfer_done<%d> timeout!!", cmd->opcode, data->blocks * data->blksz);
1214 ERR_MSG(" DMA_SA = 0x%x", sdr_read32(MSDC_DMA_SA));
1215 ERR_MSG(" DMA_CA = 0x%x", sdr_read32(MSDC_DMA_CA));
1216 ERR_MSG(" DMA_CTRL = 0x%x", sdr_read32(MSDC_DMA_CTRL));
1217 ERR_MSG(" DMA_CFG = 0x%x", sdr_read32(MSDC_DMA_CFG));
1218 data->error = -ETIMEDOUT;
1219
1220 msdc_reset_hw(host);
1221 msdc_clr_fifo();
1222 msdc_clr_int();
1223 }
1224 spin_lock(&host->lock);
1225 msdc_dma_stop(host);
1226
1227 /* Last: stop transfer */
1228 if (data->stop) {
1229 if (msdc_do_command(host, data->stop, 0, CMD_TIMEOUT) != 0)
1230 goto done;
1231 }
1232 }
1233
1234 done:
1235 if (data != NULL) {
1236 host->data = NULL;
1237 dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
1238 mmc_get_dma_dir(data));
1239 host->blksz = 0;
1240
1241 #if 0 // don't stop twice!
1242 if (host->hw->flags & MSDC_REMOVABLE && data->error) {
1243 msdc_abort_data(host);
1244 /* reset in IRQ, stop command has issued. -> No need */
1245 }
1246 #endif
1247
1248 N_MSG(OPS, "CMD<%d> data<%s %s> blksz<%d> block<%d> error<%d>", cmd->opcode, (dma ? "dma" : "pio"),
1249 (read ? "read " : "write"), data->blksz, data->blocks, data->error);
1250 }
1251
1252 #if 0 /* --- by chhung */
1253 #if 1
1254 //if(host->id==1) {
1255 if (send_type == SND_CMD) {
1256 if (cmd->opcode == MMC_SEND_STATUS) {
1257 if ((cmd->resp[0] & CARD_READY_FOR_DATA) || (CARD_CURRENT_STATE(cmd->resp[0]) != 7)) {
1258 N_MSG(OPS, "disable clock, CMD13 IDLE");
1259 msdc_gate_clock(host->id);
1260 }
1261 } else {
1262 N_MSG(OPS, "disable clock, CMD<%d>", cmd->opcode);
1263 msdc_gate_clock(host->id);
1264 }
1265 } else {
1266 if (read) {
1267 N_MSG(OPS, "disable clock!!! Read CMD<%d>", cmd->opcode);
1268 msdc_gate_clock(host->id);
1269 }
1270 }
1271 //}
1272 #else
1273 msdc_gate_clock(host->id);
1274 #endif
1275 #endif /* end of --- */
1276
1277 if (mrq->cmd->error)
1278 host->error = 0x001;
1279 if (mrq->data && mrq->data->error)
1280 host->error |= 0x010;
1281 if (mrq->stop && mrq->stop->error)
1282 host->error |= 0x100;
1283
1284 //if (host->error) ERR_MSG("host->error<%d>", host->error);
1285
1286 return host->error;
1287 }
1288
1289 static int msdc_app_cmd(struct mmc_host *mmc, struct msdc_host *host)
1290 {
1291 struct mmc_command cmd;
1292 struct mmc_request mrq;
1293 u32 err;
1294
1295 memset(&cmd, 0, sizeof(struct mmc_command));
1296 cmd.opcode = MMC_APP_CMD;
1297 #if 0 /* bug: we meet mmc->card is null when ACMD6 */
1298 cmd.arg = mmc->card->rca << 16;
1299 #else
1300 cmd.arg = host->app_cmd_arg;
1301 #endif
1302 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
1303
1304 memset(&mrq, 0, sizeof(struct mmc_request));
1305 mrq.cmd = &cmd; cmd.mrq = &mrq;
1306 cmd.data = NULL;
1307
1308 err = msdc_do_command(host, &cmd, 0, CMD_TIMEOUT);
1309 return err;
1310 }
1311
1312 static int msdc_tune_cmdrsp(struct msdc_host *host, struct mmc_command *cmd)
1313 {
1314 int result = -1;
1315 void __iomem *base = host->base;
1316 u32 rsmpl, cur_rsmpl, orig_rsmpl;
1317 u32 rrdly, cur_rrdly = 0xffffffff, orig_rrdly;
1318 u32 skip = 1;
1319
1320 /* ==== don't support 3.0 now ====
1321 1: R_SMPL[1]
1322 2: PAD_CMD_RESP_RXDLY[26:22]
1323 ==========================*/
1324
1325 // save the previous tune result
1326 sdr_get_field(MSDC_IOCON, MSDC_IOCON_RSPL, &orig_rsmpl);
1327 sdr_get_field(MSDC_PAD_TUNE, MSDC_PAD_TUNE_CMDRRDLY, &orig_rrdly);
1328
1329 rrdly = 0;
1330 do {
1331 for (rsmpl = 0; rsmpl < 2; rsmpl++) {
1332 /* Lv1: R_SMPL[1] */
1333 cur_rsmpl = (orig_rsmpl + rsmpl) % 2;
1334 if (skip == 1) {
1335 skip = 0;
1336 continue;
1337 }
1338 sdr_set_field(MSDC_IOCON, MSDC_IOCON_RSPL, cur_rsmpl);
1339
1340 if (host->app_cmd) {
1341 result = msdc_app_cmd(host->mmc, host);
1342 if (result) {
1343 ERR_MSG("TUNE_CMD app_cmd<%d> failed: RESP_RXDLY<%d>,R_SMPL<%d>",
1344 host->mrq->cmd->opcode, cur_rrdly, cur_rsmpl);
1345 continue;
1346 }
1347 }
1348 result = msdc_do_command(host, cmd, 0, CMD_TIMEOUT); // not tune.
1349 ERR_MSG("TUNE_CMD<%d> %s PAD_CMD_RESP_RXDLY[26:22]<%d> R_SMPL[1]<%d>", cmd->opcode,
1350 (result == 0) ? "PASS" : "FAIL", cur_rrdly, cur_rsmpl);
1351
1352 if (result == 0)
1353 return 0;
1354 if (result != -EIO) {
1355 ERR_MSG("TUNE_CMD<%d> Error<%d> not -EIO", cmd->opcode, result);
1356 return result;
1357 }
1358
1359 /* should be EIO */
1360 if (sdr_read32(SDC_CMD) & 0x1800) { /* check if has data phase */
1361 msdc_abort_data(host);
1362 }
1363 }
1364
1365 /* Lv2: PAD_CMD_RESP_RXDLY[26:22] */
1366 cur_rrdly = (orig_rrdly + rrdly + 1) % 32;
1367 sdr_set_field(MSDC_PAD_TUNE, MSDC_PAD_TUNE_CMDRRDLY, cur_rrdly);
1368 } while (++rrdly < 32);
1369
1370 return result;
1371 }
1372
1373 /* Support SD2.0 Only */
1374 static int msdc_tune_bread(struct mmc_host *mmc, struct mmc_request *mrq)
1375 {
1376 struct msdc_host *host = mmc_priv(mmc);
1377 void __iomem *base = host->base;
1378 u32 ddr = 0;
1379 u32 dcrc = 0;
1380 u32 rxdly, cur_rxdly0, cur_rxdly1;
1381 u32 dsmpl, cur_dsmpl, orig_dsmpl;
1382 u32 cur_dat0, cur_dat1, cur_dat2, cur_dat3;
1383 u32 cur_dat4, cur_dat5, cur_dat6, cur_dat7;
1384 u32 orig_dat0, orig_dat1, orig_dat2, orig_dat3;
1385 u32 orig_dat4, orig_dat5, orig_dat6, orig_dat7;
1386 int result = -1;
1387 u32 skip = 1;
1388
1389 sdr_get_field(MSDC_IOCON, MSDC_IOCON_DSPL, &orig_dsmpl);
1390
1391 /* Tune Method 2. */
1392 sdr_set_field(MSDC_IOCON, MSDC_IOCON_DDLSEL, 1);
1393
1394 rxdly = 0;
1395 do {
1396 for (dsmpl = 0; dsmpl < 2; dsmpl++) {
1397 cur_dsmpl = (orig_dsmpl + dsmpl) % 2;
1398 if (skip == 1) {
1399 skip = 0;
1400 continue;
1401 }
1402 sdr_set_field(MSDC_IOCON, MSDC_IOCON_DSPL, cur_dsmpl);
1403
1404 if (host->app_cmd) {
1405 result = msdc_app_cmd(host->mmc, host);
1406 if (result) {
1407 ERR_MSG("TUNE_BREAD app_cmd<%d> failed", host->mrq->cmd->opcode);
1408 continue;
1409 }
1410 }
1411 result = msdc_do_request(mmc, mrq);
1412
1413 sdr_get_field(SDC_DCRC_STS,
1414 SDC_DCRC_STS_POS | SDC_DCRC_STS_NEG,
1415 &dcrc); /* RO */
1416 if (!ddr)
1417 dcrc &= ~SDC_DCRC_STS_NEG;
1418 ERR_MSG("TUNE_BREAD<%s> dcrc<0x%x> DATRDDLY0/1<0x%x><0x%x> dsmpl<0x%x>",
1419 (result == 0 && dcrc == 0) ? "PASS" : "FAIL", dcrc,
1420 sdr_read32(MSDC_DAT_RDDLY0), sdr_read32(MSDC_DAT_RDDLY1), cur_dsmpl);
1421
1422 /* Fix me: result is 0, but dcrc is still exist */
1423 if (result == 0 && dcrc == 0) {
1424 goto done;
1425 } else {
1426 /* there is a case: command timeout, and data phase not processed */
1427 if (mrq->data->error != 0 &&
1428 mrq->data->error != -EIO) {
1429 ERR_MSG("TUNE_READ: result<0x%x> cmd_error<%d> data_error<%d>",
1430 result, mrq->cmd->error, mrq->data->error);
1431 goto done;
1432 }
1433 }
1434 }
1435
1436 cur_rxdly0 = sdr_read32(MSDC_DAT_RDDLY0);
1437 cur_rxdly1 = sdr_read32(MSDC_DAT_RDDLY1);
1438
1439 /* E1 ECO. YD: Reverse */
1440 if (sdr_read32(MSDC_ECO_VER) >= 4) {
1441 orig_dat0 = (cur_rxdly0 >> 24) & 0x1F;
1442 orig_dat1 = (cur_rxdly0 >> 16) & 0x1F;
1443 orig_dat2 = (cur_rxdly0 >> 8) & 0x1F;
1444 orig_dat3 = (cur_rxdly0 >> 0) & 0x1F;
1445 orig_dat4 = (cur_rxdly1 >> 24) & 0x1F;
1446 orig_dat5 = (cur_rxdly1 >> 16) & 0x1F;
1447 orig_dat6 = (cur_rxdly1 >> 8) & 0x1F;
1448 orig_dat7 = (cur_rxdly1 >> 0) & 0x1F;
1449 } else {
1450 orig_dat0 = (cur_rxdly0 >> 0) & 0x1F;
1451 orig_dat1 = (cur_rxdly0 >> 8) & 0x1F;
1452 orig_dat2 = (cur_rxdly0 >> 16) & 0x1F;
1453 orig_dat3 = (cur_rxdly0 >> 24) & 0x1F;
1454 orig_dat4 = (cur_rxdly1 >> 0) & 0x1F;
1455 orig_dat5 = (cur_rxdly1 >> 8) & 0x1F;
1456 orig_dat6 = (cur_rxdly1 >> 16) & 0x1F;
1457 orig_dat7 = (cur_rxdly1 >> 24) & 0x1F;
1458 }
1459
1460 if (ddr) {
1461 cur_dat0 = (dcrc & (1 << 0) || dcrc & (1 << 8)) ? ((orig_dat0 + 1) % 32) : orig_dat0;
1462 cur_dat1 = (dcrc & (1 << 1) || dcrc & (1 << 9)) ? ((orig_dat1 + 1) % 32) : orig_dat1;
1463 cur_dat2 = (dcrc & (1 << 2) || dcrc & (1 << 10)) ? ((orig_dat2 + 1) % 32) : orig_dat2;
1464 cur_dat3 = (dcrc & (1 << 3) || dcrc & (1 << 11)) ? ((orig_dat3 + 1) % 32) : orig_dat3;
1465 } else {
1466 cur_dat0 = (dcrc & (1 << 0)) ? ((orig_dat0 + 1) % 32) : orig_dat0;
1467 cur_dat1 = (dcrc & (1 << 1)) ? ((orig_dat1 + 1) % 32) : orig_dat1;
1468 cur_dat2 = (dcrc & (1 << 2)) ? ((orig_dat2 + 1) % 32) : orig_dat2;
1469 cur_dat3 = (dcrc & (1 << 3)) ? ((orig_dat3 + 1) % 32) : orig_dat3;
1470 }
1471 cur_dat4 = (dcrc & (1 << 4)) ? ((orig_dat4 + 1) % 32) : orig_dat4;
1472 cur_dat5 = (dcrc & (1 << 5)) ? ((orig_dat5 + 1) % 32) : orig_dat5;
1473 cur_dat6 = (dcrc & (1 << 6)) ? ((orig_dat6 + 1) % 32) : orig_dat6;
1474 cur_dat7 = (dcrc & (1 << 7)) ? ((orig_dat7 + 1) % 32) : orig_dat7;
1475
1476 cur_rxdly0 = (cur_dat0 << 24) | (cur_dat1 << 16) | (cur_dat2 << 8) | (cur_dat3 << 0);
1477 cur_rxdly1 = (cur_dat4 << 24) | (cur_dat5 << 16) | (cur_dat6 << 8) | (cur_dat7 << 0);
1478
1479 sdr_write32(MSDC_DAT_RDDLY0, cur_rxdly0);
1480 sdr_write32(MSDC_DAT_RDDLY1, cur_rxdly1);
1481
1482 } while (++rxdly < 32);
1483
1484 done:
1485 return result;
1486 }
1487
1488 static int msdc_tune_bwrite(struct mmc_host *mmc, struct mmc_request *mrq)
1489 {
1490 struct msdc_host *host = mmc_priv(mmc);
1491 void __iomem *base = host->base;
1492
1493 u32 wrrdly, cur_wrrdly = 0xffffffff, orig_wrrdly;
1494 u32 dsmpl, cur_dsmpl, orig_dsmpl;
1495 u32 rxdly, cur_rxdly0;
1496 u32 orig_dat0, orig_dat1, orig_dat2, orig_dat3;
1497 u32 cur_dat0, cur_dat1, cur_dat2, cur_dat3;
1498 int result = -1;
1499 u32 skip = 1;
1500
1501 // MSDC_IOCON_DDR50CKD need to check. [Fix me]
1502
1503 sdr_get_field(MSDC_PAD_TUNE, MSDC_PAD_TUNE_DATWRDLY, &orig_wrrdly);
1504 sdr_get_field(MSDC_IOCON, MSDC_IOCON_DSPL, &orig_dsmpl);
1505
1506 /* Tune Method 2. just DAT0 */
1507 sdr_set_field(MSDC_IOCON, MSDC_IOCON_DDLSEL, 1);
1508 cur_rxdly0 = sdr_read32(MSDC_DAT_RDDLY0);
1509
1510 /* E1 ECO. YD: Reverse */
1511 if (sdr_read32(MSDC_ECO_VER) >= 4) {
1512 orig_dat0 = (cur_rxdly0 >> 24) & 0x1F;
1513 orig_dat1 = (cur_rxdly0 >> 16) & 0x1F;
1514 orig_dat2 = (cur_rxdly0 >> 8) & 0x1F;
1515 orig_dat3 = (cur_rxdly0 >> 0) & 0x1F;
1516 } else {
1517 orig_dat0 = (cur_rxdly0 >> 0) & 0x1F;
1518 orig_dat1 = (cur_rxdly0 >> 8) & 0x1F;
1519 orig_dat2 = (cur_rxdly0 >> 16) & 0x1F;
1520 orig_dat3 = (cur_rxdly0 >> 24) & 0x1F;
1521 }
1522
1523 rxdly = 0;
1524 do {
1525 wrrdly = 0;
1526 do {
1527 for (dsmpl = 0; dsmpl < 2; dsmpl++) {
1528 cur_dsmpl = (orig_dsmpl + dsmpl) % 2;
1529 if (skip == 1) {
1530 skip = 0;
1531 continue;
1532 }
1533 sdr_set_field(MSDC_IOCON, MSDC_IOCON_DSPL, cur_dsmpl);
1534
1535 if (host->app_cmd) {
1536 result = msdc_app_cmd(host->mmc, host);
1537 if (result) {
1538 ERR_MSG("TUNE_BWRITE app_cmd<%d> failed", host->mrq->cmd->opcode);
1539 continue;
1540 }
1541 }
1542 result = msdc_do_request(mmc, mrq);
1543
1544 ERR_MSG("TUNE_BWRITE<%s> DSPL<%d> DATWRDLY<%d> MSDC_DAT_RDDLY0<0x%x>",
1545 result == 0 ? "PASS" : "FAIL",
1546 cur_dsmpl, cur_wrrdly, cur_rxdly0);
1547
1548 if (result == 0) {
1549 goto done;
1550 } else {
1551 /* there is a case: command timeout, and data phase not processed */
1552 if (mrq->data->error != -EIO) {
1553 ERR_MSG("TUNE_READ: result<0x%x> cmd_error<%d> data_error<%d>",
1554 result, mrq->cmd->error, mrq->data->error);
1555 goto done;
1556 }
1557 }
1558 }
1559 cur_wrrdly = (orig_wrrdly + wrrdly + 1) % 32;
1560 sdr_set_field(MSDC_PAD_TUNE, MSDC_PAD_TUNE_DATWRDLY, cur_wrrdly);
1561 } while (++wrrdly < 32);
1562
1563 cur_dat0 = (orig_dat0 + rxdly) % 32; /* only adjust bit-1 for crc */
1564 cur_dat1 = orig_dat1;
1565 cur_dat2 = orig_dat2;
1566 cur_dat3 = orig_dat3;
1567
1568 cur_rxdly0 = (cur_dat0 << 24) | (cur_dat1 << 16) | (cur_dat2 << 8) | (cur_dat3 << 0);
1569 sdr_write32(MSDC_DAT_RDDLY0, cur_rxdly0);
1570 } while (++rxdly < 32);
1571
1572 done:
1573 return result;
1574 }
1575
1576 static int msdc_get_card_status(struct mmc_host *mmc, struct msdc_host *host, u32 *status)
1577 {
1578 struct mmc_command cmd;
1579 struct mmc_request mrq;
1580 u32 err;
1581
1582 memset(&cmd, 0, sizeof(struct mmc_command));
1583 cmd.opcode = MMC_SEND_STATUS;
1584 if (mmc->card) {
1585 cmd.arg = mmc->card->rca << 16;
1586 } else {
1587 ERR_MSG("cmd13 mmc card is null");
1588 cmd.arg = host->app_cmd_arg;
1589 }
1590 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
1591
1592 memset(&mrq, 0, sizeof(struct mmc_request));
1593 mrq.cmd = &cmd; cmd.mrq = &mrq;
1594 cmd.data = NULL;
1595
1596 err = msdc_do_command(host, &cmd, 1, CMD_TIMEOUT);
1597
1598 if (status)
1599 *status = cmd.resp[0];
1600
1601 return err;
1602 }
1603
1604 static int msdc_check_busy(struct mmc_host *mmc, struct msdc_host *host)
1605 {
1606 u32 err = 0;
1607 u32 status = 0;
1608
1609 do {
1610 err = msdc_get_card_status(mmc, host, &status);
1611 if (err)
1612 return err;
1613 /* need cmd12? */
1614 ERR_MSG("cmd<13> resp<0x%x>", status);
1615 } while (R1_CURRENT_STATE(status) == 7);
1616
1617 return err;
1618 }
1619
1620 /* failed when msdc_do_request */
1621 static int msdc_tune_request(struct mmc_host *mmc, struct mmc_request *mrq)
1622 {
1623 struct msdc_host *host = mmc_priv(mmc);
1624 struct mmc_command *cmd;
1625 struct mmc_data *data;
1626 //u32 base = host->base;
1627 int ret = 0, read;
1628
1629 cmd = mrq->cmd;
1630 data = mrq->cmd->data;
1631
1632 read = data->flags & MMC_DATA_READ ? 1 : 0;
1633
1634 if (read) {
1635 if (data->error == -EIO)
1636 ret = msdc_tune_bread(mmc, mrq);
1637 } else {
1638 ret = msdc_check_busy(mmc, host);
1639 if (ret) {
1640 ERR_MSG("XXX cmd13 wait program done failed");
1641 return ret;
1642 }
1643 /* CRC and TO */
1644 /* Fix me: don't care card status? */
1645 ret = msdc_tune_bwrite(mmc, mrq);
1646 }
1647
1648 return ret;
1649 }
1650
1651 /* ops.request */
1652 static void msdc_ops_request(struct mmc_host *mmc, struct mmc_request *mrq)
1653 {
1654 struct msdc_host *host = mmc_priv(mmc);
1655
1656 //=== for sdio profile ===
1657 #if 0 /* --- by chhung */
1658 u32 old_H32, old_L32, new_H32, new_L32;
1659 u32 ticks = 0, opcode = 0, sizes = 0, bRx = 0;
1660 #endif /* end of --- */
1661
1662 WARN_ON(host->mrq);
1663
1664 /* start to process */
1665 spin_lock(&host->lock);
1666 #if 0 /* --- by chhung */
1667 if (sdio_pro_enable) { //=== for sdio profile ===
1668 if (mrq->cmd->opcode == 52 || mrq->cmd->opcode == 53)
1669 GPT_GetCounter64(&old_L32, &old_H32);
1670 }
1671 #endif /* end of --- */
1672
1673 host->mrq = mrq;
1674
1675 if (msdc_do_request(mmc, mrq)) {
1676 if (host->hw->flags & MSDC_REMOVABLE && ralink_soc == MT762X_SOC_MT7621AT && mrq->data && mrq->data->error)
1677 msdc_tune_request(mmc, mrq);
1678 }
1679
1680 /* ==== when request done, check if app_cmd ==== */
1681 if (mrq->cmd->opcode == MMC_APP_CMD) {
1682 host->app_cmd = 1;
1683 host->app_cmd_arg = mrq->cmd->arg; /* save the RCA */
1684 } else {
1685 host->app_cmd = 0;
1686 //host->app_cmd_arg = 0;
1687 }
1688
1689 host->mrq = NULL;
1690
1691 #if 0 /* --- by chhung */
1692 //=== for sdio profile ===
1693 if (sdio_pro_enable) {
1694 if (mrq->cmd->opcode == 52 || mrq->cmd->opcode == 53) {
1695 GPT_GetCounter64(&new_L32, &new_H32);
1696 ticks = msdc_time_calc(old_L32, old_H32, new_L32, new_H32);
1697
1698 opcode = mrq->cmd->opcode;
1699 if (mrq->cmd->data) {
1700 sizes = mrq->cmd->data->blocks * mrq->cmd->data->blksz;
1701 bRx = mrq->cmd->data->flags & MMC_DATA_READ ? 1 : 0;
1702 } else {
1703 bRx = mrq->cmd->arg & 0x80000000 ? 1 : 0;
1704 }
1705
1706 if (!mrq->cmd->error)
1707 msdc_performance(opcode, sizes, bRx, ticks);
1708 }
1709 }
1710 #endif /* end of --- */
1711 spin_unlock(&host->lock);
1712
1713 mmc_request_done(mmc, mrq);
1714
1715 return;
1716 }
1717
1718 /* called by ops.set_ios */
1719 static void msdc_set_buswidth(struct msdc_host *host, u32 width)
1720 {
1721 void __iomem *base = host->base;
1722 u32 val = sdr_read32(SDC_CFG);
1723
1724 val &= ~SDC_CFG_BUSWIDTH;
1725
1726 switch (width) {
1727 default:
1728 case MMC_BUS_WIDTH_1:
1729 width = 1;
1730 val |= (MSDC_BUS_1BITS << 16);
1731 break;
1732 case MMC_BUS_WIDTH_4:
1733 val |= (MSDC_BUS_4BITS << 16);
1734 break;
1735 case MMC_BUS_WIDTH_8:
1736 val |= (MSDC_BUS_8BITS << 16);
1737 break;
1738 }
1739
1740 sdr_write32(SDC_CFG, val);
1741
1742 N_MSG(CFG, "Bus Width = %d", width);
1743 }
1744
1745 /* ops.set_ios */
1746 static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1747 {
1748 struct msdc_host *host = mmc_priv(mmc);
1749 void __iomem *base = host->base;
1750 u32 ddr = 0;
1751
1752 #ifdef MT6575_SD_DEBUG
1753 static char *vdd[] = {
1754 "1.50v", "1.55v", "1.60v", "1.65v", "1.70v", "1.80v", "1.90v",
1755 "2.00v", "2.10v", "2.20v", "2.30v", "2.40v", "2.50v", "2.60v",
1756 "2.70v", "2.80v", "2.90v", "3.00v", "3.10v", "3.20v", "3.30v",
1757 "3.40v", "3.50v", "3.60v"
1758 };
1759 static char *power_mode[] = {
1760 "OFF", "UP", "ON"
1761 };
1762 static char *bus_mode[] = {
1763 "UNKNOWN", "OPENDRAIN", "PUSHPULL"
1764 };
1765 static char *timing[] = {
1766 "LEGACY", "MMC_HS", "SD_HS"
1767 };
1768
1769 printk("SET_IOS: CLK(%dkHz), BUS(%s), BW(%u), PWR(%s), VDD(%s), TIMING(%s)",
1770 ios->clock / 1000, bus_mode[ios->bus_mode],
1771 (ios->bus_width == MMC_BUS_WIDTH_4) ? 4 : 1,
1772 power_mode[ios->power_mode], vdd[ios->vdd], timing[ios->timing]);
1773 #endif
1774
1775 msdc_set_buswidth(host, ios->bus_width);
1776
1777 /* Power control ??? */
1778 switch (ios->power_mode) {
1779 case MMC_POWER_OFF:
1780 case MMC_POWER_UP:
1781 // msdc_set_power_mode(host, ios->power_mode); /* --- by chhung */
1782 break;
1783 case MMC_POWER_ON:
1784 host->power_mode = MMC_POWER_ON;
1785 break;
1786 default:
1787 break;
1788 }
1789
1790 /* Clock control */
1791 if (host->mclk != ios->clock) {
1792 if (ios->clock > 25000000) {
1793 //if (!(host->hw->flags & MSDC_REMOVABLE)) {
1794 INIT_MSG("SD data latch edge<%d>", MSDC_SMPL_FALLING);
1795 sdr_set_field(MSDC_IOCON, MSDC_IOCON_RSPL,
1796 MSDC_SMPL_FALLING);
1797 sdr_set_field(MSDC_IOCON, MSDC_IOCON_DSPL,
1798 MSDC_SMPL_FALLING);
1799 //} /* for tuning debug */
1800 } else { /* default value */
1801 sdr_write32(MSDC_IOCON, 0x00000000);
1802 // sdr_write32(MSDC_DAT_RDDLY0, 0x00000000);
1803 sdr_write32(MSDC_DAT_RDDLY0, 0x10101010); // for MT7620 E2 and afterward
1804 sdr_write32(MSDC_DAT_RDDLY1, 0x00000000);
1805 // sdr_write32(MSDC_PAD_TUNE, 0x00000000);
1806 sdr_write32(MSDC_PAD_TUNE, 0x84101010); // for MT7620 E2 and afterward
1807 }
1808 msdc_set_mclk(host, ddr, ios->clock);
1809 }
1810 }
1811
1812 /* ops.get_ro */
1813 static int msdc_ops_get_ro(struct mmc_host *mmc)
1814 {
1815 struct msdc_host *host = mmc_priv(mmc);
1816 void __iomem *base = host->base;
1817 unsigned long flags;
1818 int ro = 0;
1819
1820 if (host->hw->flags & MSDC_WP_PIN_EN) { /* set for card */
1821 spin_lock_irqsave(&host->lock, flags);
1822 ro = (sdr_read32(MSDC_PS) >> 31);
1823 spin_unlock_irqrestore(&host->lock, flags);
1824 }
1825 return ro;
1826 }
1827
1828 /* ops.get_cd */
1829 static int msdc_ops_get_cd(struct mmc_host *mmc)
1830 {
1831 struct msdc_host *host = mmc_priv(mmc);
1832 void __iomem *base = host->base;
1833 unsigned long flags;
1834 int present = 1;
1835
1836 /* for sdio, MSDC_REMOVABLE not set, always return 1 */
1837 if (!(host->hw->flags & MSDC_REMOVABLE)) {
1838 /* For sdio, read H/W always get<1>, but may timeout some times */
1839 #if 1
1840 host->card_inserted = 1;
1841 return 1;
1842 #else
1843 host->card_inserted = (host->pm_state.event == PM_EVENT_USER_RESUME) ? 1 : 0;
1844 INIT_MSG("sdio ops_get_cd<%d>", host->card_inserted);
1845 return host->card_inserted;
1846 #endif
1847 }
1848
1849 /* MSDC_CD_PIN_EN set for card */
1850 if (host->hw->flags & MSDC_CD_PIN_EN) {
1851 spin_lock_irqsave(&host->lock, flags);
1852 #if 0
1853 present = host->card_inserted; /* why not read from H/W: Fix me*/
1854 #else
1855 // CD
1856 if (cd_active_low)
1857 present = (sdr_read32(MSDC_PS) & MSDC_PS_CDSTS) ? 0 : 1;
1858 else
1859 present = (sdr_read32(MSDC_PS) & MSDC_PS_CDSTS) ? 1 : 0;
1860 host->card_inserted = present;
1861 #endif
1862 spin_unlock_irqrestore(&host->lock, flags);
1863 } else {
1864 present = 0; /* TODO? Check DAT3 pins for card detection */
1865 }
1866
1867 INIT_MSG("ops_get_cd return<%d>", present);
1868 return present;
1869 }
1870
1871 static struct mmc_host_ops mt_msdc_ops = {
1872 .request = msdc_ops_request,
1873 .set_ios = msdc_ops_set_ios,
1874 .get_ro = msdc_ops_get_ro,
1875 .get_cd = msdc_ops_get_cd,
1876 };
1877
1878 /*--------------------------------------------------------------------------*/
1879 /* interrupt handler */
1880 /*--------------------------------------------------------------------------*/
1881 static irqreturn_t msdc_irq(int irq, void *dev_id)
1882 {
1883 struct msdc_host *host = (struct msdc_host *)dev_id;
1884 struct mmc_data *data = host->data;
1885 struct mmc_command *cmd = host->cmd;
1886 void __iomem *base = host->base;
1887
1888 u32 cmdsts = MSDC_INT_RSPCRCERR | MSDC_INT_CMDTMO | MSDC_INT_CMDRDY |
1889 MSDC_INT_ACMDCRCERR | MSDC_INT_ACMDTMO | MSDC_INT_ACMDRDY |
1890 MSDC_INT_ACMD19_DONE;
1891 u32 datsts = MSDC_INT_DATCRCERR | MSDC_INT_DATTMO;
1892
1893 u32 intsts = sdr_read32(MSDC_INT);
1894 u32 inten = sdr_read32(MSDC_INTEN); inten &= intsts;
1895
1896 sdr_write32(MSDC_INT, intsts); /* clear interrupts */
1897 /* MSG will cause fatal error */
1898
1899 /* card change interrupt */
1900 if (intsts & MSDC_INT_CDSC) {
1901 if (host->mmc->caps & MMC_CAP_NEEDS_POLL)
1902 return IRQ_HANDLED;
1903 IRQ_MSG("MSDC_INT_CDSC irq<0x%.8x>", intsts);
1904 schedule_delayed_work(&host->card_delaywork, HZ);
1905 /* tuning when plug card ? */
1906 }
1907
1908 /* sdio interrupt */
1909 if (intsts & MSDC_INT_SDIOIRQ) {
1910 IRQ_MSG("XXX MSDC_INT_SDIOIRQ"); /* seems not sdio irq */
1911 //mmc_signal_sdio_irq(host->mmc);
1912 }
1913
1914 /* transfer complete interrupt */
1915 if (data != NULL) {
1916 if (inten & MSDC_INT_XFER_COMPL) {
1917 data->bytes_xfered = host->xfer_size;
1918 complete(&host->xfer_done);
1919 }
1920
1921 if (intsts & datsts) {
1922 /* do basic reset, or stop command will sdc_busy */
1923 msdc_reset_hw(host);
1924 msdc_clr_fifo();
1925 msdc_clr_int();
1926
1927 if (intsts & MSDC_INT_DATTMO) {
1928 IRQ_MSG("XXX CMD<%d> MSDC_INT_DATTMO", host->mrq->cmd->opcode);
1929 data->error = -ETIMEDOUT;
1930 } else if (intsts & MSDC_INT_DATCRCERR) {
1931 IRQ_MSG("XXX CMD<%d> MSDC_INT_DATCRCERR, SDC_DCRC_STS<0x%x>", host->mrq->cmd->opcode, sdr_read32(SDC_DCRC_STS));
1932 data->error = -EIO;
1933 }
1934
1935 //if(sdr_read32(MSDC_INTEN) & MSDC_INT_XFER_COMPL) {
1936 complete(&host->xfer_done); /* Read CRC come fast, XFER_COMPL not enabled */
1937 }
1938 }
1939
1940 /* command interrupts */
1941 if ((cmd != NULL) && (intsts & cmdsts)) {
1942 if ((intsts & MSDC_INT_CMDRDY) || (intsts & MSDC_INT_ACMDRDY) ||
1943 (intsts & MSDC_INT_ACMD19_DONE)) {
1944 u32 *rsp = &cmd->resp[0];
1945
1946 switch (host->cmd_rsp) {
1947 case RESP_NONE:
1948 break;
1949 case RESP_R2:
1950 *rsp++ = sdr_read32(SDC_RESP3); *rsp++ = sdr_read32(SDC_RESP2);
1951 *rsp++ = sdr_read32(SDC_RESP1); *rsp++ = sdr_read32(SDC_RESP0);
1952 break;
1953 default: /* Response types 1, 3, 4, 5, 6, 7(1b) */
1954 if ((intsts & MSDC_INT_ACMDRDY) || (intsts & MSDC_INT_ACMD19_DONE))
1955 *rsp = sdr_read32(SDC_ACMD_RESP);
1956 else
1957 *rsp = sdr_read32(SDC_RESP0);
1958 break;
1959 }
1960 } else if ((intsts & MSDC_INT_RSPCRCERR) || (intsts & MSDC_INT_ACMDCRCERR)) {
1961 if (intsts & MSDC_INT_ACMDCRCERR)
1962 IRQ_MSG("XXX CMD<%d> MSDC_INT_ACMDCRCERR", cmd->opcode);
1963 else
1964 IRQ_MSG("XXX CMD<%d> MSDC_INT_RSPCRCERR", cmd->opcode);
1965 cmd->error = -EIO;
1966 } else if ((intsts & MSDC_INT_CMDTMO) || (intsts & MSDC_INT_ACMDTMO)) {
1967 if (intsts & MSDC_INT_ACMDTMO)
1968 IRQ_MSG("XXX CMD<%d> MSDC_INT_ACMDTMO", cmd->opcode);
1969 else
1970 IRQ_MSG("XXX CMD<%d> MSDC_INT_CMDTMO", cmd->opcode);
1971 cmd->error = -ETIMEDOUT;
1972 msdc_reset_hw(host);
1973 msdc_clr_fifo();
1974 msdc_clr_int();
1975 }
1976 complete(&host->cmd_done);
1977 }
1978
1979 /* mmc irq interrupts */
1980 if (intsts & MSDC_INT_MMCIRQ)
1981 printk(KERN_INFO "msdc[%d] MMCIRQ: SDC_CSTS=0x%.8x\r\n", host->id, sdr_read32(SDC_CSTS));
1982
1983 #ifdef MT6575_SD_DEBUG
1984 {
1985 /* msdc_int_reg *int_reg = (msdc_int_reg*)&intsts;*/
1986 N_MSG(INT, "IRQ_EVT(0x%x): MMCIRQ(%d) CDSC(%d), ACRDY(%d), ACTMO(%d), ACCRE(%d) AC19DN(%d)",
1987 intsts,
1988 int_reg->mmcirq,
1989 int_reg->cdsc,
1990 int_reg->atocmdrdy,
1991 int_reg->atocmdtmo,
1992 int_reg->atocmdcrc,
1993 int_reg->atocmd19done);
1994 N_MSG(INT, "IRQ_EVT(0x%x): SDIO(%d) CMDRDY(%d), CMDTMO(%d), RSPCRC(%d), CSTA(%d)",
1995 intsts,
1996 int_reg->sdioirq,
1997 int_reg->cmdrdy,
1998 int_reg->cmdtmo,
1999 int_reg->rspcrc,
2000 int_reg->csta);
2001 N_MSG(INT, "IRQ_EVT(0x%x): XFCMP(%d) DXDONE(%d), DATTMO(%d), DATCRC(%d), DMAEMP(%d)",
2002 intsts,
2003 int_reg->xfercomp,
2004 int_reg->dxferdone,
2005 int_reg->dattmo,
2006 int_reg->datcrc,
2007 int_reg->dmaqempty);
2008 }
2009 #endif
2010
2011 return IRQ_HANDLED;
2012 }
2013
2014 /*--------------------------------------------------------------------------*/
2015 /* platform_driver members */
2016 /*--------------------------------------------------------------------------*/
2017 /* called by msdc_drv_probe/remove */
2018 static void msdc_enable_cd_irq(struct msdc_host *host, int enable)
2019 {
2020 struct msdc_hw *hw = host->hw;
2021 void __iomem *base = host->base;
2022
2023 /* for sdio, not set */
2024 if ((hw->flags & MSDC_CD_PIN_EN) == 0) {
2025 /* Pull down card detection pin since it is not avaiable */
2026 /*
2027 if (hw->config_gpio_pin)
2028 hw->config_gpio_pin(MSDC_CD_PIN, GPIO_PULL_DOWN);
2029 */
2030 sdr_clr_bits(MSDC_PS, MSDC_PS_CDEN);
2031 sdr_clr_bits(MSDC_INTEN, MSDC_INTEN_CDSC);
2032 sdr_clr_bits(SDC_CFG, SDC_CFG_INSWKUP);
2033 return;
2034 }
2035
2036 N_MSG(CFG, "CD IRQ Eanable(%d)", enable);
2037
2038 if (enable) {
2039 /* card detection circuit relies on the core power so that the core power
2040 * shouldn't be turned off. Here adds a reference count to keep
2041 * the core power alive.
2042 */
2043 //msdc_vcore_on(host); //did in msdc_init_hw()
2044
2045 if (hw->config_gpio_pin) /* NULL */
2046 hw->config_gpio_pin(MSDC_CD_PIN, GPIO_PULL_UP);
2047
2048 sdr_set_field(MSDC_PS, MSDC_PS_CDDEBOUNCE, DEFAULT_DEBOUNCE);
2049 sdr_set_bits(MSDC_PS, MSDC_PS_CDEN);
2050 sdr_set_bits(MSDC_INTEN, MSDC_INTEN_CDSC);
2051 sdr_set_bits(SDC_CFG, SDC_CFG_INSWKUP); /* not in document! Fix me */
2052 } else {
2053 if (hw->config_gpio_pin) /* NULL */
2054 hw->config_gpio_pin(MSDC_CD_PIN, GPIO_PULL_DOWN);
2055
2056 sdr_clr_bits(SDC_CFG, SDC_CFG_INSWKUP);
2057 sdr_clr_bits(MSDC_PS, MSDC_PS_CDEN);
2058 sdr_clr_bits(MSDC_INTEN, MSDC_INTEN_CDSC);
2059
2060 /* Here decreases a reference count to core power since card
2061 * detection circuit is shutdown.
2062 */
2063 //msdc_vcore_off(host);
2064 }
2065 }
2066
2067 /* called by msdc_drv_probe */
2068 static void msdc_init_hw(struct msdc_host *host)
2069 {
2070 void __iomem *base = host->base;
2071
2072 /* Power on */
2073 #if 0 /* --- by chhung */
2074 msdc_vcore_on(host);
2075 msdc_pin_reset(host, MSDC_PIN_PULL_UP);
2076 msdc_select_clksrc(host, hw->clk_src);
2077 enable_clock(PERI_MSDC0_PDN + host->id, "SD");
2078 msdc_vdd_on(host);
2079 #endif /* end of --- */
2080 /* Configure to MMC/SD mode */
2081 sdr_set_field(MSDC_CFG, MSDC_CFG_MODE, MSDC_SDMMC);
2082
2083 /* Reset */
2084 msdc_reset_hw(host);
2085 msdc_clr_fifo();
2086
2087 /* Disable card detection */
2088 sdr_clr_bits(MSDC_PS, MSDC_PS_CDEN);
2089
2090 /* Disable and clear all interrupts */
2091 sdr_clr_bits(MSDC_INTEN, sdr_read32(MSDC_INTEN));
2092 sdr_write32(MSDC_INT, sdr_read32(MSDC_INT));
2093
2094 #if 1
2095 /* reset tuning parameter */
2096 sdr_write32(MSDC_PAD_CTL0, 0x00090000);
2097 sdr_write32(MSDC_PAD_CTL1, 0x000A0000);
2098 sdr_write32(MSDC_PAD_CTL2, 0x000A0000);
2099 // sdr_write32(MSDC_PAD_TUNE, 0x00000000);
2100 sdr_write32(MSDC_PAD_TUNE, 0x84101010); // for MT7620 E2 and afterward
2101 // sdr_write32(MSDC_DAT_RDDLY0, 0x00000000);
2102 sdr_write32(MSDC_DAT_RDDLY0, 0x10101010); // for MT7620 E2 and afterward
2103 sdr_write32(MSDC_DAT_RDDLY1, 0x00000000);
2104 sdr_write32(MSDC_IOCON, 0x00000000);
2105 #if 0 // use MT7620 default value: 0x403c004f
2106 sdr_write32(MSDC_PATCH_BIT0, 0x003C000F); /* bit0 modified: Rx Data Clock Source: 1 -> 2.0*/
2107 #endif
2108
2109 if (sdr_read32(MSDC_ECO_VER) >= 4) {
2110 if (host->id == 1) {
2111 sdr_set_field(MSDC_PATCH_BIT1, MSDC_PATCH_BIT1_WRDAT_CRCS, 1);
2112 sdr_set_field(MSDC_PATCH_BIT1, MSDC_PATCH_BIT1_CMD_RSP, 1);
2113
2114 /* internal clock: latch read data */
2115 sdr_set_bits(MSDC_PATCH_BIT0, MSDC_PATCH_BIT_CKGEN_CK);
2116 }
2117 }
2118 #endif
2119
2120 /* for safety, should clear SDC_CFG.SDIO_INT_DET_EN & set SDC_CFG.SDIO in
2121 pre-loader,uboot,kernel drivers. and SDC_CFG.SDIO_INT_DET_EN will be only
2122 set when kernel driver wants to use SDIO bus interrupt */
2123 /* Configure to enable SDIO mode. it's must otherwise sdio cmd5 failed */
2124 sdr_set_bits(SDC_CFG, SDC_CFG_SDIO);
2125
2126 /* disable detect SDIO device interupt function */
2127 sdr_clr_bits(SDC_CFG, SDC_CFG_SDIOIDE);
2128
2129 /* eneable SMT for glitch filter */
2130 sdr_set_bits(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKSMT);
2131 sdr_set_bits(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDSMT);
2132 sdr_set_bits(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATSMT);
2133
2134 #if 1
2135 /* set clk, cmd, dat pad driving */
2136 sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKDRVN, 4);
2137 sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKDRVP, 4);
2138 sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDDRVN, 4);
2139 sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDDRVP, 4);
2140 sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATDRVN, 4);
2141 sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATDRVP, 4);
2142 #else
2143 sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKDRVN, 0);
2144 sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKDRVP, 0);
2145 sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDDRVN, 0);
2146 sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDDRVP, 0);
2147 sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATDRVN, 0);
2148 sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATDRVP, 0);
2149 #endif
2150
2151 /* set sampling edge */
2152
2153 /* write crc timeout detection */
2154 sdr_set_field(MSDC_PATCH_BIT0, 1 << 30, 1);
2155
2156 /* Configure to default data timeout */
2157 sdr_set_field(SDC_CFG, SDC_CFG_DTOC, DEFAULT_DTOC);
2158
2159 msdc_set_buswidth(host, MMC_BUS_WIDTH_1);
2160
2161 N_MSG(FUC, "init hardware done!");
2162 }
2163
2164 /* called by msdc_drv_remove */
2165 static void msdc_deinit_hw(struct msdc_host *host)
2166 {
2167 void __iomem *base = host->base;
2168
2169 /* Disable and clear all interrupts */
2170 sdr_clr_bits(MSDC_INTEN, sdr_read32(MSDC_INTEN));
2171 sdr_write32(MSDC_INT, sdr_read32(MSDC_INT));
2172
2173 /* Disable card detection */
2174 msdc_enable_cd_irq(host, 0);
2175 // msdc_set_power_mode(host, MMC_POWER_OFF); /* make sure power down */ /* --- by chhung */
2176 }
2177
2178 /* init gpd and bd list in msdc_drv_probe */
2179 static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma)
2180 {
2181 struct gpd *gpd = dma->gpd;
2182 struct bd *bd = dma->bd;
2183 int i;
2184
2185 /* we just support one gpd, but gpd->next must be set for desc
2186 * DMA. That's why we alloc 2 gpd structurs.
2187 */
2188
2189 memset(gpd, 0, sizeof(struct gpd) * 2);
2190
2191 gpd->bdp = 1; /* hwo, cs, bd pointer */
2192 gpd->ptr = (void *)dma->bd_addr; /* physical address */
2193 gpd->next = (void *)((u32)dma->gpd_addr + sizeof(struct gpd));
2194
2195 memset(bd, 0, sizeof(struct bd) * MAX_BD_NUM);
2196 for (i = 0; i < (MAX_BD_NUM - 1); i++)
2197 bd[i].next = (void *)(dma->bd_addr + sizeof(*bd) * (i + 1));
2198 }
2199
2200 static int msdc_drv_probe(struct platform_device *pdev)
2201 {
2202 struct resource *res;
2203 __iomem void *base;
2204 struct mmc_host *mmc;
2205 struct msdc_host *host;
2206 struct msdc_hw *hw;
2207 int ret;
2208 u32 reg;
2209
2210 // Set the pins for sdxc to sdxc mode
2211 //FIXME: this should be done by pinctl and not by the sd driver
2212 if (ralink_soc == MT762X_SOC_MT7620A ||
2213 ralink_soc == MT762X_SOC_MT7621AT) {
2214 reg = sdr_read32((void __iomem *)(RALINK_SYSCTL_BASE +
2215 0x60)) & ~(0x3 << 18);
2216 if (ralink_soc == MT762X_SOC_MT7620A)
2217 reg |= 0x1 << 18;
2218 } else {
2219 reg = sdr_read32((void __iomem *)(RALINK_SYSCTL_BASE + 0x3c));
2220 reg |= 0x1e << 16;
2221 sdr_write32((void __iomem *)(RALINK_SYSCTL_BASE + 0x3c), reg);
2222 reg = sdr_read32((void __iomem *)(RALINK_SYSCTL_BASE +
2223 0x60)) & ~(0x3 << 10);
2224 #if defined(CONFIG_MTK_MMC_EMMC_8BIT)
2225 reg |= 0x3 << 26 | 0x3 << 28 | 0x3 << 30;
2226 #endif
2227 }
2228
2229 sdr_write32((void __iomem *)(RALINK_SYSCTL_BASE + 0x60), reg);
2230
2231 hw = &msdc0_hw;
2232
2233 if (of_property_read_bool(pdev->dev.of_node, "mtk,wp-en"))
2234 msdc0_hw.flags |= MSDC_WP_PIN_EN;
2235
2236 /* Allocate MMC host for this device */
2237 mmc = mmc_alloc_host(sizeof(struct msdc_host), &pdev->dev);
2238 if (!mmc)
2239 return -ENOMEM;
2240
2241 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2242 base = devm_ioremap_resource(&pdev->dev, res);
2243 if (IS_ERR(base)) {
2244 ret = PTR_ERR(base);
2245 goto host_free;
2246 }
2247
2248 /* Set host parameters to mmc */
2249 mmc->ops = &mt_msdc_ops;
2250 mmc->f_min = HOST_MIN_MCLK;
2251 mmc->f_max = HOST_MAX_MCLK;
2252 mmc->ocr_avail = MSDC_OCR_AVAIL;
2253
2254 mmc->caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED;
2255
2256 //TODO: read this as bus-width from dt (via mmc_of_parse)
2257 mmc->caps |= MMC_CAP_4_BIT_DATA;
2258
2259 cd_active_low = !of_property_read_bool(pdev->dev.of_node, "mediatek,cd-high");
2260
2261 if (of_property_read_bool(pdev->dev.of_node, "mediatek,cd-poll"))
2262 mmc->caps |= MMC_CAP_NEEDS_POLL;
2263
2264 /* MMC core transfer sizes tunable parameters */
2265 mmc->max_segs = MAX_HW_SGMTS;
2266
2267 mmc->max_seg_size = MAX_SGMT_SZ;
2268 mmc->max_blk_size = HOST_MAX_BLKSZ;
2269 mmc->max_req_size = MAX_REQ_SZ;
2270 mmc->max_blk_count = mmc->max_req_size;
2271
2272 host = mmc_priv(mmc);
2273 host->hw = hw;
2274 host->mmc = mmc;
2275 host->id = pdev->id;
2276 if (host->id < 0 || host->id >= 4)
2277 host->id = 0;
2278 host->error = 0;
2279
2280 host->irq = platform_get_irq(pdev, 0);
2281 if (host->irq < 0) {
2282 ret = -EINVAL;
2283 goto host_free;
2284 }
2285
2286 host->base = base;
2287 host->mclk = 0; /* mclk: the request clock of mmc sub-system */
2288 host->hclk = hclks[hw->clk_src]; /* hclk: clock of clock source to msdc controller */
2289 host->sclk = 0; /* sclk: the really clock after divition */
2290 host->pm_state = PMSG_RESUME;
2291 host->suspend = 0;
2292 host->core_clkon = 0;
2293 host->card_clkon = 0;
2294 host->core_power = 0;
2295 host->power_mode = MMC_POWER_OFF;
2296 // host->card_inserted = hw->flags & MSDC_REMOVABLE ? 0 : 1;
2297 host->timeout_ns = 0;
2298 host->timeout_clks = DEFAULT_DTOC * 65536;
2299
2300 host->mrq = NULL;
2301 //init_MUTEX(&host->sem); /* we don't need to support multiple threads access */
2302
2303 mmc_dev(mmc)->dma_mask = NULL;
2304
2305 /* using dma_alloc_coherent*/ /* todo: using 1, for all 4 slots */
2306 host->dma.gpd = dma_alloc_coherent(&pdev->dev,
2307 MAX_GPD_NUM * sizeof(struct gpd),
2308 &host->dma.gpd_addr, GFP_KERNEL);
2309 host->dma.bd = dma_alloc_coherent(&pdev->dev,
2310 MAX_BD_NUM * sizeof(struct bd),
2311 &host->dma.bd_addr, GFP_KERNEL);
2312 if (!host->dma.gpd || !host->dma.bd) {
2313 ret = -ENOMEM;
2314 goto release_mem;
2315 }
2316 msdc_init_gpd_bd(host, &host->dma);
2317
2318 INIT_DELAYED_WORK(&host->card_delaywork, msdc_tasklet_card);
2319 spin_lock_init(&host->lock);
2320 msdc_init_hw(host);
2321
2322 /* TODO check weather flags 0 is correct, the mtk-sd driver uses
2323 * IRQF_TRIGGER_LOW | IRQF_ONESHOT for flags
2324 *
2325 * for flags 0 the trigger polarity is determined by the
2326 * device tree, but not the oneshot flag, but maybe it is also
2327 * not needed because the soc could be oneshot safe.
2328 */
2329 ret = devm_request_irq(&pdev->dev, host->irq, msdc_irq, 0, pdev->name,
2330 host);
2331 if (ret)
2332 goto release;
2333
2334 platform_set_drvdata(pdev, mmc);
2335
2336 ret = mmc_add_host(mmc);
2337 if (ret)
2338 goto release;
2339
2340 /* Config card detection pin and enable interrupts */
2341 if (hw->flags & MSDC_CD_PIN_EN) { /* set for card */
2342 msdc_enable_cd_irq(host, 1);
2343 } else {
2344 msdc_enable_cd_irq(host, 0);
2345 }
2346
2347 return 0;
2348
2349 release:
2350 platform_set_drvdata(pdev, NULL);
2351 msdc_deinit_hw(host);
2352 cancel_delayed_work_sync(&host->card_delaywork);
2353
2354 release_mem:
2355 if (host->dma.gpd)
2356 dma_free_coherent(&pdev->dev, MAX_GPD_NUM * sizeof(struct gpd),
2357 host->dma.gpd, host->dma.gpd_addr);
2358 if (host->dma.bd)
2359 dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct bd),
2360 host->dma.bd, host->dma.bd_addr);
2361 host_free:
2362 mmc_free_host(mmc);
2363
2364 return ret;
2365 }
2366
2367 /* 4 device share one driver, using "drvdata" to show difference */
2368 static int msdc_drv_remove(struct platform_device *pdev)
2369 {
2370 struct mmc_host *mmc;
2371 struct msdc_host *host;
2372
2373 mmc = platform_get_drvdata(pdev);
2374 BUG_ON(!mmc);
2375
2376 host = mmc_priv(mmc);
2377 BUG_ON(!host);
2378
2379 ERR_MSG("removed !!!");
2380
2381 platform_set_drvdata(pdev, NULL);
2382 mmc_remove_host(host->mmc);
2383 msdc_deinit_hw(host);
2384
2385 cancel_delayed_work_sync(&host->card_delaywork);
2386
2387 dma_free_coherent(&pdev->dev, MAX_GPD_NUM * sizeof(struct gpd),
2388 host->dma.gpd, host->dma.gpd_addr);
2389 dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct bd),
2390 host->dma.bd, host->dma.bd_addr);
2391
2392 mmc_free_host(host->mmc);
2393
2394 return 0;
2395 }
2396
2397 /* Fix me: Power Flow */
2398 #ifdef CONFIG_PM
2399
2400 static void msdc_drv_pm(struct platform_device *pdev, pm_message_t state)
2401 {
2402 struct mmc_host *mmc = platform_get_drvdata(pdev);
2403 if (mmc) {
2404 struct msdc_host *host = mmc_priv(mmc);
2405 msdc_pm(state, (void *)host);
2406 }
2407 }
2408
2409 static int msdc_drv_suspend(struct platform_device *pdev, pm_message_t state)
2410 {
2411 if (state.event == PM_EVENT_SUSPEND)
2412 msdc_drv_pm(pdev, state);
2413 return 0;
2414 }
2415
2416 static int msdc_drv_resume(struct platform_device *pdev)
2417 {
2418 struct pm_message state;
2419
2420 state.event = PM_EVENT_RESUME;
2421 msdc_drv_pm(pdev, state);
2422 return 0;
2423 }
2424 #endif
2425
2426 static const struct of_device_id mt7620_sdhci_match[] = {
2427 { .compatible = "ralink,mt7620-sdhci" },
2428 {},
2429 };
2430 MODULE_DEVICE_TABLE(of, mt7620_sdhci_match);
2431
2432 static struct platform_driver mt_msdc_driver = {
2433 .probe = msdc_drv_probe,
2434 .remove = msdc_drv_remove,
2435 #ifdef CONFIG_PM
2436 .suspend = msdc_drv_suspend,
2437 .resume = msdc_drv_resume,
2438 #endif
2439 .driver = {
2440 .name = DRV_NAME,
2441 .of_match_table = mt7620_sdhci_match,
2442 },
2443 };
2444
2445 /*--------------------------------------------------------------------------*/
2446 /* module init/exit */
2447 /*--------------------------------------------------------------------------*/
2448 static int __init mt_msdc_init(void)
2449 {
2450 int ret;
2451
2452 ret = platform_driver_register(&mt_msdc_driver);
2453 if (ret) {
2454 printk(KERN_ERR DRV_NAME ": Can't register driver");
2455 return ret;
2456 }
2457
2458 #if defined(MT6575_SD_DEBUG)
2459 msdc_debug_proc_init();
2460 #endif
2461 return 0;
2462 }
2463
2464 static void __exit mt_msdc_exit(void)
2465 {
2466 platform_driver_unregister(&mt_msdc_driver);
2467 }
2468
2469 module_init(mt_msdc_init);
2470 module_exit(mt_msdc_exit);
2471 MODULE_LICENSE("GPL");
2472 MODULE_DESCRIPTION("MediaTek MT6575 SD/MMC Card Driver");
2473 MODULE_AUTHOR("Infinity Chen <infinity.chen@mediatek.com>");
OpenWrt Source Repository