blob: fb28f0166f03357fc66db5e2ac2dd08bc18f6cd9 [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +00002/*
3 * Faraday MMC/SD Host Controller
4 *
5 * (C) Copyright 2010 Faraday Technology
6 * Dante Su <dantesu@faraday-tech.com>
7 *
Rick Chenbf9ba4d2018-03-20 15:52:58 +08008 * Copyright 2018 Andes Technology, Inc.
9 * Author: Rick Chen (rick@andestech.com)
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +000010 */
11
12#include <common.h>
Rick Chenbf9ba4d2018-03-20 15:52:58 +080013#include <clk.h>
Simon Glassf7ae49f2020-05-10 11:40:05 -060014#include <log.h>
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +000015#include <malloc.h>
16#include <part.h>
17#include <mmc.h>
Simon Glasscd93d622020-05-10 11:40:13 -060018#include <linux/bitops.h>
Rick Chen252185f2017-08-28 16:44:11 +080019#include <linux/io.h>
Masahiro Yamada1221ce42016-09-21 11:28:55 +090020#include <linux/errno.h>
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +000021#include <asm/byteorder.h>
22#include <faraday/ftsdc010.h>
Rick Chen252185f2017-08-28 16:44:11 +080023#include "ftsdc010_mci.h"
Rick Chenbf9ba4d2018-03-20 15:52:58 +080024#include <dm.h>
25#include <dt-structs.h>
26#include <errno.h>
27#include <mapmem.h>
28#include <pwrseq.h>
29#include <syscon.h>
30#include <linux/err.h>
31
32DECLARE_GLOBAL_DATA_PTR;
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +000033
34#define CFG_CMD_TIMEOUT (CONFIG_SYS_HZ >> 4) /* 250 ms */
35#define CFG_RST_TIMEOUT CONFIG_SYS_HZ /* 1 sec reset timeout */
36
Rick Chenbf9ba4d2018-03-20 15:52:58 +080037#if CONFIG_IS_ENABLED(OF_PLATDATA)
38struct ftsdc010 {
39 fdt32_t bus_width;
40 bool cap_mmc_highspeed;
41 bool cap_sd_highspeed;
42 fdt32_t clock_freq_min_max[2];
43 struct phandle_2_cell clocks[4];
44 fdt32_t fifo_depth;
45 fdt32_t reg[2];
46};
47#endif
48
49struct ftsdc010_plat {
50#if CONFIG_IS_ENABLED(OF_PLATDATA)
51 struct ftsdc010 dtplat;
52#endif
53 struct mmc_config cfg;
54 struct mmc mmc;
55};
56
57struct ftsdc_priv {
58 struct clk clk;
59 struct ftsdc010_chip chip;
60 int fifo_depth;
61 bool fifo_mode;
62 u32 minmax[2];
63};
64
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +000065static inline int ftsdc010_send_cmd(struct mmc *mmc, struct mmc_cmd *mmc_cmd)
66{
67 struct ftsdc010_chip *chip = mmc->priv;
68 struct ftsdc010_mmc __iomem *regs = chip->regs;
Jaehoon Chung915ffa52016-07-19 16:33:36 +090069 int ret = -ETIMEDOUT;
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +000070 uint32_t ts, st;
71 uint32_t cmd = FTSDC010_CMD_IDX(mmc_cmd->cmdidx);
72 uint32_t arg = mmc_cmd->cmdarg;
73 uint32_t flags = mmc_cmd->resp_type;
74
75 cmd |= FTSDC010_CMD_CMD_EN;
76
77 if (chip->acmd) {
78 cmd |= FTSDC010_CMD_APP_CMD;
79 chip->acmd = 0;
80 }
81
82 if (flags & MMC_RSP_PRESENT)
83 cmd |= FTSDC010_CMD_NEED_RSP;
84
85 if (flags & MMC_RSP_136)
86 cmd |= FTSDC010_CMD_LONG_RSP;
87
88 writel(FTSDC010_STATUS_RSP_MASK | FTSDC010_STATUS_CMD_SEND,
89 &regs->clr);
90 writel(arg, &regs->argu);
91 writel(cmd, &regs->cmd);
92
93 if (!(flags & (MMC_RSP_PRESENT | MMC_RSP_136))) {
94 for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) {
95 if (readl(&regs->status) & FTSDC010_STATUS_CMD_SEND) {
96 writel(FTSDC010_STATUS_CMD_SEND, &regs->clr);
97 ret = 0;
98 break;
99 }
100 }
101 } else {
102 st = 0;
103 for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) {
104 st = readl(&regs->status);
105 writel(st & FTSDC010_STATUS_RSP_MASK, &regs->clr);
106 if (st & FTSDC010_STATUS_RSP_MASK)
107 break;
108 }
109 if (st & FTSDC010_STATUS_RSP_CRC_OK) {
110 if (flags & MMC_RSP_136) {
111 mmc_cmd->response[0] = readl(&regs->rsp3);
112 mmc_cmd->response[1] = readl(&regs->rsp2);
113 mmc_cmd->response[2] = readl(&regs->rsp1);
114 mmc_cmd->response[3] = readl(&regs->rsp0);
115 } else {
116 mmc_cmd->response[0] = readl(&regs->rsp0);
117 }
118 ret = 0;
119 } else {
120 debug("ftsdc010: rsp err (cmd=%d, st=0x%x)\n",
121 mmc_cmd->cmdidx, st);
122 }
123 }
124
125 if (ret) {
126 debug("ftsdc010: cmd timeout (op code=%d)\n",
127 mmc_cmd->cmdidx);
128 } else if (mmc_cmd->cmdidx == MMC_CMD_APP_CMD) {
129 chip->acmd = 1;
130 }
131
132 return ret;
133}
134
135static void ftsdc010_clkset(struct mmc *mmc, uint32_t rate)
136{
137 struct ftsdc010_chip *chip = mmc->priv;
138 struct ftsdc010_mmc __iomem *regs = chip->regs;
139 uint32_t div;
140
141 for (div = 0; div < 0x7f; ++div) {
142 if (rate >= chip->sclk / (2 * (div + 1)))
143 break;
144 }
145 chip->rate = chip->sclk / (2 * (div + 1));
146
147 writel(FTSDC010_CCR_CLK_DIV(div), &regs->ccr);
148
149 if (IS_SD(mmc)) {
150 setbits_le32(&regs->ccr, FTSDC010_CCR_CLK_SD);
151
152 if (chip->rate > 25000000)
153 setbits_le32(&regs->ccr, FTSDC010_CCR_CLK_HISPD);
154 else
155 clrbits_le32(&regs->ccr, FTSDC010_CCR_CLK_HISPD);
156 }
157}
158
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +0000159static int ftsdc010_wait(struct ftsdc010_mmc __iomem *regs, uint32_t mask)
160{
Jaehoon Chung915ffa52016-07-19 16:33:36 +0900161 int ret = -ETIMEDOUT;
Rick Chen252185f2017-08-28 16:44:11 +0800162 uint32_t st, timeout = 10000000;
163 while (timeout--) {
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +0000164 st = readl(&regs->status);
165 if (!(st & mask))
166 continue;
167 writel(st & mask, &regs->clr);
168 ret = 0;
169 break;
170 }
171
Rick Chen1a9db642017-08-25 14:02:13 +0800172 if (ret){
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +0000173 debug("ftsdc010: wait st(0x%x) timeout\n", mask);
Rick Chen1a9db642017-08-25 14:02:13 +0800174 }
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +0000175
176 return ret;
177}
178
179/*
180 * u-boot mmc api
181 */
Rick Chen252185f2017-08-28 16:44:11 +0800182static int ftsdc010_request(struct udevice *dev, struct mmc_cmd *cmd,
183 struct mmc_data *data)
184{
185 struct mmc *mmc = mmc_get_mmc_dev(dev);
Jaehoon Chung915ffa52016-07-19 16:33:36 +0900186 int ret = -EOPNOTSUPP;
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +0000187 uint32_t len = 0;
188 struct ftsdc010_chip *chip = mmc->priv;
189 struct ftsdc010_mmc __iomem *regs = chip->regs;
190
191 if (data && (data->flags & MMC_DATA_WRITE) && chip->wprot) {
192 printf("ftsdc010: the card is write protected!\n");
193 return ret;
194 }
195
196 if (data) {
197 uint32_t dcr;
198
199 len = data->blocksize * data->blocks;
200
201 /* 1. data disable + fifo reset */
Gabor Juhosdbb713b2013-05-26 12:11:27 +0200202 dcr = 0;
203#ifdef CONFIG_FTSDC010_SDIO
204 dcr |= FTSDC010_DCR_FIFO_RST;
205#endif
206 writel(dcr, &regs->dcr);
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +0000207
208 /* 2. clear status register */
209 writel(FTSDC010_STATUS_DATA_MASK | FTSDC010_STATUS_FIFO_URUN
210 | FTSDC010_STATUS_FIFO_ORUN, &regs->clr);
211
212 /* 3. data timeout (1 sec) */
213 writel(chip->rate, &regs->dtr);
214
215 /* 4. data length (bytes) */
216 writel(len, &regs->dlr);
217
218 /* 5. data enable */
219 dcr = (ffs(data->blocksize) - 1) | FTSDC010_DCR_DATA_EN;
220 if (data->flags & MMC_DATA_WRITE)
221 dcr |= FTSDC010_DCR_DATA_WRITE;
222 writel(dcr, &regs->dcr);
223 }
224
225 ret = ftsdc010_send_cmd(mmc, cmd);
226 if (ret) {
227 printf("ftsdc010: CMD%d failed\n", cmd->cmdidx);
228 return ret;
229 }
230
231 if (!data)
232 return ret;
233
234 if (data->flags & MMC_DATA_WRITE) {
235 const uint8_t *buf = (const uint8_t *)data->src;
236
237 while (len > 0) {
238 int wlen;
239
240 /* wait for tx ready */
241 ret = ftsdc010_wait(regs, FTSDC010_STATUS_FIFO_URUN);
242 if (ret)
243 break;
244
245 /* write bytes to ftsdc010 */
246 for (wlen = 0; wlen < len && wlen < chip->fifo; ) {
247 writel(*(uint32_t *)buf, &regs->dwr);
248 buf += 4;
249 wlen += 4;
250 }
251
252 len -= wlen;
253 }
254
255 } else {
256 uint8_t *buf = (uint8_t *)data->dest;
257
258 while (len > 0) {
259 int rlen;
260
261 /* wait for rx ready */
262 ret = ftsdc010_wait(regs, FTSDC010_STATUS_FIFO_ORUN);
263 if (ret)
264 break;
265
266 /* fetch bytes from ftsdc010 */
267 for (rlen = 0; rlen < len && rlen < chip->fifo; ) {
268 *(uint32_t *)buf = readl(&regs->dwr);
269 buf += 4;
270 rlen += 4;
271 }
272
273 len -= rlen;
274 }
275
276 }
277
278 if (!ret) {
279 ret = ftsdc010_wait(regs,
Rick Chen1a9db642017-08-25 14:02:13 +0800280 FTSDC010_STATUS_DATA_END | FTSDC010_STATUS_DATA_CRC_OK);
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +0000281 }
282
283 return ret;
284}
285
Rick Chen252185f2017-08-28 16:44:11 +0800286static int ftsdc010_set_ios(struct udevice *dev)
287{
288 struct mmc *mmc = mmc_get_mmc_dev(dev);
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +0000289 struct ftsdc010_chip *chip = mmc->priv;
290 struct ftsdc010_mmc __iomem *regs = chip->regs;
291
292 ftsdc010_clkset(mmc, mmc->clock);
293
294 clrbits_le32(&regs->bwr, FTSDC010_BWR_MODE_MASK);
295 switch (mmc->bus_width) {
296 case 4:
297 setbits_le32(&regs->bwr, FTSDC010_BWR_MODE_4BIT);
298 break;
299 case 8:
300 setbits_le32(&regs->bwr, FTSDC010_BWR_MODE_8BIT);
301 break;
302 default:
303 setbits_le32(&regs->bwr, FTSDC010_BWR_MODE_1BIT);
304 break;
305 }
Jaehoon Chung07b0b9c2016-12-30 15:30:16 +0900306
307 return 0;
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +0000308}
309
Rick Chen252185f2017-08-28 16:44:11 +0800310static int ftsdc010_get_cd(struct udevice *dev)
311{
312 struct mmc *mmc = mmc_get_mmc_dev(dev);
Rick Chen252185f2017-08-28 16:44:11 +0800313 struct ftsdc010_chip *chip = mmc->priv;
314 struct ftsdc010_mmc __iomem *regs = chip->regs;
315 return !(readl(&regs->status) & FTSDC010_STATUS_CARD_DETECT);
316}
317
Rick Chen252185f2017-08-28 16:44:11 +0800318static int ftsdc010_get_wp(struct udevice *dev)
319{
320 struct mmc *mmc = mmc_get_mmc_dev(dev);
Rick Chen252185f2017-08-28 16:44:11 +0800321 struct ftsdc010_chip *chip = mmc->priv;
322 struct ftsdc010_mmc __iomem *regs = chip->regs;
323 if (readl(&regs->status) & FTSDC010_STATUS_WRITE_PROT) {
324 printf("ftsdc010: write protected\n");
325 chip->wprot = 1;
326 }
327
328 return 0;
329}
330
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +0000331static int ftsdc010_init(struct mmc *mmc)
332{
333 struct ftsdc010_chip *chip = mmc->priv;
334 struct ftsdc010_mmc __iomem *regs = chip->regs;
335 uint32_t ts;
336
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +0000337 chip->fifo = (readl(&regs->feature) & 0xff) << 2;
338
339 /* 1. chip reset */
340 writel(FTSDC010_CMD_SDC_RST, &regs->cmd);
341 for (ts = get_timer(0); get_timer(ts) < CFG_RST_TIMEOUT; ) {
342 if (readl(&regs->cmd) & FTSDC010_CMD_SDC_RST)
343 continue;
344 break;
345 }
346 if (readl(&regs->cmd) & FTSDC010_CMD_SDC_RST) {
347 printf("ftsdc010: reset failed\n");
Jaehoon Chung915ffa52016-07-19 16:33:36 +0900348 return -EOPNOTSUPP;
Kuo-Jung Suf6c3b342013-05-06 20:32:51 +0000349 }
350
351 /* 2. enter low speed mode (400k card detection) */
352 ftsdc010_clkset(mmc, 400000);
353
354 /* 3. interrupt disabled */
355 writel(0, &regs->int_mask);
356
357 return 0;
358}
359
Rick Chenbf9ba4d2018-03-20 15:52:58 +0800360static int ftsdc010_probe(struct udevice *dev)
Rick Chen252185f2017-08-28 16:44:11 +0800361{
362 struct mmc *mmc = mmc_get_mmc_dev(dev);
363 return ftsdc010_init(mmc);
364}
365
Rick Chenbf9ba4d2018-03-20 15:52:58 +0800366const struct dm_mmc_ops dm_ftsdc010_mmc_ops = {
Rick Chen252185f2017-08-28 16:44:11 +0800367 .send_cmd = ftsdc010_request,
368 .set_ios = ftsdc010_set_ios,
369 .get_cd = ftsdc010_get_cd,
370 .get_wp = ftsdc010_get_wp,
371};
372
Rick Chenbf9ba4d2018-03-20 15:52:58 +0800373static void ftsdc_setup_cfg(struct mmc_config *cfg, const char *name, int buswidth,
Rick Chen252185f2017-08-28 16:44:11 +0800374 uint caps, u32 max_clk, u32 min_clk)
375{
376 cfg->name = name;
377 cfg->f_min = min_clk;
378 cfg->f_max = max_clk;
379 cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
380 cfg->host_caps = caps;
381 if (buswidth == 8) {
382 cfg->host_caps |= MMC_MODE_8BIT;
383 cfg->host_caps &= ~MMC_MODE_4BIT;
384 } else {
385 cfg->host_caps |= MMC_MODE_4BIT;
386 cfg->host_caps &= ~MMC_MODE_8BIT;
387 }
Rick Chen252185f2017-08-28 16:44:11 +0800388 cfg->part_type = PART_TYPE_DOS;
389 cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
390}
391
Rick Chenbf9ba4d2018-03-20 15:52:58 +0800392static int ftsdc010_mmc_ofdata_to_platdata(struct udevice *dev)
Rick Chen252185f2017-08-28 16:44:11 +0800393{
Rick Chenbf9ba4d2018-03-20 15:52:58 +0800394#if !CONFIG_IS_ENABLED(OF_PLATDATA)
395 struct ftsdc_priv *priv = dev_get_priv(dev);
396 struct ftsdc010_chip *chip = &priv->chip;
397 chip->name = dev->name;
Tom Rini72083962020-07-24 08:42:06 -0400398 chip->ioaddr = (void *)devfdt_get_addr(dev);
Rick Chenbf9ba4d2018-03-20 15:52:58 +0800399 chip->buswidth = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
400 "bus-width", 4);
401 chip->priv = dev;
402 priv->fifo_depth = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
403 "fifo-depth", 0);
404 priv->fifo_mode = fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
405 "fifo-mode");
406 if (fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev),
407 "clock-freq-min-max", priv->minmax, 2)) {
408 int val = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
409 "max-frequency", -EINVAL);
410 if (val < 0)
411 return val;
412
413 priv->minmax[0] = 400000; /* 400 kHz */
414 priv->minmax[1] = val;
415 } else {
416 debug("%s: 'clock-freq-min-max' property was deprecated.\n",
417 __func__);
418 }
419#endif
420 chip->sclk = priv->minmax[1];
421 chip->regs = chip->ioaddr;
422 return 0;
Rick Chen252185f2017-08-28 16:44:11 +0800423}
Rick Chenbf9ba4d2018-03-20 15:52:58 +0800424
425static int ftsdc010_mmc_probe(struct udevice *dev)
426{
427 struct ftsdc010_plat *plat = dev_get_platdata(dev);
428 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
429 struct ftsdc_priv *priv = dev_get_priv(dev);
430 struct ftsdc010_chip *chip = &priv->chip;
431 struct udevice *pwr_dev __maybe_unused;
432
433#if CONFIG_IS_ENABLED(OF_PLATDATA)
434 int ret;
435 struct ftsdc010 *dtplat = &plat->dtplat;
436 chip->name = dev->name;
437 chip->ioaddr = map_sysmem(dtplat->reg[0], dtplat->reg[1]);
438 chip->buswidth = dtplat->bus_width;
439 chip->priv = dev;
440 chip->dev_index = 1;
441 memcpy(priv->minmax, dtplat->clock_freq_min_max, sizeof(priv->minmax));
Walter Lozano51f12632020-06-25 01:10:13 -0300442 ret = clk_get_by_driver_info(dev, dtplat->clocks, &priv->clk);
Rick Chenbf9ba4d2018-03-20 15:52:58 +0800443 if (ret < 0)
444 return ret;
445#endif
446
447 if (dev_read_bool(dev, "cap-mmc-highspeed") || \
448 dev_read_bool(dev, "cap-sd-highspeed"))
449 chip->caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;
450
451 ftsdc_setup_cfg(&plat->cfg, dev->name, chip->buswidth, chip->caps,
452 priv->minmax[1] , priv->minmax[0]);
453 chip->mmc = &plat->mmc;
454 chip->mmc->priv = &priv->chip;
455 chip->mmc->dev = dev;
456 upriv->mmc = chip->mmc;
457 return ftsdc010_probe(dev);
458}
459
460int ftsdc010_mmc_bind(struct udevice *dev)
461{
462 struct ftsdc010_plat *plat = dev_get_platdata(dev);
463
464 return mmc_bind(dev, &plat->mmc, &plat->cfg);
465}
466
467static const struct udevice_id ftsdc010_mmc_ids[] = {
Rick Chencf3922d2018-05-29 11:00:28 +0800468 { .compatible = "andestech,atfsdc010" },
Rick Chenbf9ba4d2018-03-20 15:52:58 +0800469 { }
470};
471
472U_BOOT_DRIVER(ftsdc010_mmc) = {
473 .name = "ftsdc010_mmc",
474 .id = UCLASS_MMC,
475 .of_match = ftsdc010_mmc_ids,
476 .ofdata_to_platdata = ftsdc010_mmc_ofdata_to_platdata,
477 .ops = &dm_ftsdc010_mmc_ops,
478 .bind = ftsdc010_mmc_bind,
479 .probe = ftsdc010_mmc_probe,
480 .priv_auto_alloc_size = sizeof(struct ftsdc_priv),
481 .platdata_auto_alloc_size = sizeof(struct ftsdc010_plat),
482};