blob: fce0ef091184b39e07adf8a0acc8c29ab6a2d3dc [file] [log] [blame]
Lei Wenaf62a552011-06-28 21:50:06 +00001/*
2 * Copyright 2011, Marvell Semiconductor Inc.
3 * Lei Wen <leiwen@marvell.com>
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 *
23 * Back ported to the 8xx platform (from the 8260 platform) by
24 * Murray.Jensen@cmst.csiro.au, 27-Jan-01.
25 */
26
27#include <common.h>
28#include <malloc.h>
29#include <mmc.h>
30#include <sdhci.h>
31
32void *aligned_buffer;
33
34static void sdhci_reset(struct sdhci_host *host, u8 mask)
35{
36 unsigned long timeout;
37
38 /* Wait max 100 ms */
39 timeout = 100;
40 sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
41 while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) {
42 if (timeout == 0) {
43 printf("Reset 0x%x never completed.\n", (int)mask);
44 return;
45 }
46 timeout--;
47 udelay(1000);
48 }
49}
50
51static void sdhci_cmd_done(struct sdhci_host *host, struct mmc_cmd *cmd)
52{
53 int i;
54 if (cmd->resp_type & MMC_RSP_136) {
55 /* CRC is stripped so we need to do some shifting. */
56 for (i = 0; i < 4; i++) {
57 cmd->response[i] = sdhci_readl(host,
58 SDHCI_RESPONSE + (3-i)*4) << 8;
59 if (i != 3)
60 cmd->response[i] |= sdhci_readb(host,
61 SDHCI_RESPONSE + (3-i)*4-1);
62 }
63 } else {
64 cmd->response[0] = sdhci_readl(host, SDHCI_RESPONSE);
65 }
66}
67
68static void sdhci_transfer_pio(struct sdhci_host *host, struct mmc_data *data)
69{
70 int i;
71 char *offs;
72 for (i = 0; i < data->blocksize; i += 4) {
73 offs = data->dest + i;
74 if (data->flags == MMC_DATA_READ)
75 *(u32 *)offs = sdhci_readl(host, SDHCI_BUFFER);
76 else
77 sdhci_writel(host, *(u32 *)offs, SDHCI_BUFFER);
78 }
79}
80
81static int sdhci_transfer_data(struct sdhci_host *host, struct mmc_data *data,
82 unsigned int start_addr)
83{
Lei Wena004abd2011-10-08 04:14:57 +000084 unsigned int stat, rdy, mask, timeout, block = 0;
Lei Wenaf62a552011-06-28 21:50:06 +000085
Lei Wena004abd2011-10-08 04:14:57 +000086 timeout = 10000;
Lei Wenaf62a552011-06-28 21:50:06 +000087 rdy = SDHCI_INT_SPACE_AVAIL | SDHCI_INT_DATA_AVAIL;
88 mask = SDHCI_DATA_AVAILABLE | SDHCI_SPACE_AVAILABLE;
89 do {
90 stat = sdhci_readl(host, SDHCI_INT_STATUS);
91 if (stat & SDHCI_INT_ERROR) {
92 printf("Error detected in status(0x%X)!\n", stat);
93 return -1;
94 }
95 if (stat & rdy) {
96 if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & mask))
97 continue;
98 sdhci_writel(host, rdy, SDHCI_INT_STATUS);
99 sdhci_transfer_pio(host, data);
100 data->dest += data->blocksize;
101 if (++block >= data->blocks)
102 break;
103 }
104#ifdef CONFIG_MMC_SDMA
105 if (stat & SDHCI_INT_DMA_END) {
106 sdhci_writel(host, SDHCI_INT_DMA_END, SDHCI_INT_STATUS);
Lei Wen3e81c772011-10-08 04:14:58 +0000107 start_addr &= ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1);
Lei Wenaf62a552011-06-28 21:50:06 +0000108 start_addr += SDHCI_DEFAULT_BOUNDARY_SIZE;
109 sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS);
110 }
111#endif
Lei Wena004abd2011-10-08 04:14:57 +0000112 if (timeout-- > 0)
113 udelay(10);
114 else {
115 printf("Transfer data timeout\n");
116 return -1;
117 }
Lei Wenaf62a552011-06-28 21:50:06 +0000118 } while (!(stat & SDHCI_INT_DATA_END));
119 return 0;
120}
121
122int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
123 struct mmc_data *data)
124{
125 struct sdhci_host *host = (struct sdhci_host *)mmc->priv;
126 unsigned int stat = 0;
127 int ret = 0;
128 int trans_bytes = 0, is_aligned = 1;
129 u32 mask, flags, mode;
130 unsigned int timeout, start_addr = 0;
131
132 /* Wait max 10 ms */
133 timeout = 10;
134
135 sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_STATUS);
136 mask = SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT;
137
138 /* We shouldn't wait for data inihibit for stop commands, even
139 though they might use busy signaling */
140 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
141 mask &= ~SDHCI_DATA_INHIBIT;
142
143 while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
144 if (timeout == 0) {
145 printf("Controller never released inhibit bit(s).\n");
146 return COMM_ERR;
147 }
148 timeout--;
149 udelay(1000);
150 }
151
152 mask = SDHCI_INT_RESPONSE;
153 if (!(cmd->resp_type & MMC_RSP_PRESENT))
154 flags = SDHCI_CMD_RESP_NONE;
155 else if (cmd->resp_type & MMC_RSP_136)
156 flags = SDHCI_CMD_RESP_LONG;
157 else if (cmd->resp_type & MMC_RSP_BUSY) {
158 flags = SDHCI_CMD_RESP_SHORT_BUSY;
159 mask |= SDHCI_INT_DATA_END;
160 } else
161 flags = SDHCI_CMD_RESP_SHORT;
162
163 if (cmd->resp_type & MMC_RSP_CRC)
164 flags |= SDHCI_CMD_CRC;
165 if (cmd->resp_type & MMC_RSP_OPCODE)
166 flags |= SDHCI_CMD_INDEX;
167 if (data)
168 flags |= SDHCI_CMD_DATA;
169
170 /*Set Transfer mode regarding to data flag*/
171 if (data != 0) {
172 sdhci_writeb(host, 0xe, SDHCI_TIMEOUT_CONTROL);
173 mode = SDHCI_TRNS_BLK_CNT_EN;
174 trans_bytes = data->blocks * data->blocksize;
175 if (data->blocks > 1)
176 mode |= SDHCI_TRNS_MULTI;
177
178 if (data->flags == MMC_DATA_READ)
179 mode |= SDHCI_TRNS_READ;
180
181#ifdef CONFIG_MMC_SDMA
182 if (data->flags == MMC_DATA_READ)
183 start_addr = (unsigned int)data->dest;
184 else
185 start_addr = (unsigned int)data->src;
186 if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
187 (start_addr & 0x7) != 0x0) {
188 is_aligned = 0;
189 start_addr = (unsigned int)aligned_buffer;
190 if (data->flags != MMC_DATA_READ)
191 memcpy(aligned_buffer, data->src, trans_bytes);
192 }
193
194 sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS);
195 mode |= SDHCI_TRNS_DMA;
196#endif
197 sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG,
198 data->blocksize),
199 SDHCI_BLOCK_SIZE);
200 sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT);
201 sdhci_writew(host, mode, SDHCI_TRANSFER_MODE);
202 }
203
204 sdhci_writel(host, cmd->cmdarg, SDHCI_ARGUMENT);
205#ifdef CONFIG_MMC_SDMA
Lei Wen2c2ec4c2011-10-08 04:14:54 +0000206 flush_cache(start_addr, trans_bytes);
Lei Wenaf62a552011-06-28 21:50:06 +0000207#endif
208 sdhci_writew(host, SDHCI_MAKE_CMD(cmd->cmdidx, flags), SDHCI_COMMAND);
209 do {
210 stat = sdhci_readl(host, SDHCI_INT_STATUS);
211 if (stat & SDHCI_INT_ERROR)
212 break;
213 } while ((stat & mask) != mask);
214
215 if ((stat & (SDHCI_INT_ERROR | mask)) == mask) {
216 sdhci_cmd_done(host, cmd);
217 sdhci_writel(host, mask, SDHCI_INT_STATUS);
218 } else
219 ret = -1;
220
221 if (!ret && data)
222 ret = sdhci_transfer_data(host, data, start_addr);
223
224 stat = sdhci_readl(host, SDHCI_INT_STATUS);
225 sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_STATUS);
226 if (!ret) {
227 if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
228 !is_aligned && (data->flags == MMC_DATA_READ))
229 memcpy(data->dest, aligned_buffer, trans_bytes);
230 return 0;
231 }
232
233 sdhci_reset(host, SDHCI_RESET_CMD);
234 sdhci_reset(host, SDHCI_RESET_DATA);
235 if (stat & SDHCI_INT_TIMEOUT)
236 return TIMEOUT;
237 else
238 return COMM_ERR;
239}
240
241static int sdhci_set_clock(struct mmc *mmc, unsigned int clock)
242{
243 struct sdhci_host *host = (struct sdhci_host *)mmc->priv;
244 unsigned int div, clk, timeout;
245
246 sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
247
248 if (clock == 0)
249 return 0;
250
251 if (host->version >= SDHCI_SPEC_300) {
252 /* Version 3.00 divisors must be a multiple of 2. */
253 if (mmc->f_max <= clock)
254 div = 1;
255 else {
256 for (div = 2; div < SDHCI_MAX_DIV_SPEC_300; div += 2) {
257 if ((mmc->f_max / div) <= clock)
258 break;
259 }
260 }
261 } else {
262 /* Version 2.00 divisors must be a power of 2. */
263 for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) {
264 if ((mmc->f_max / div) <= clock)
265 break;
266 }
267 }
268 div >>= 1;
269
270 clk = (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
271 clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
272 << SDHCI_DIVIDER_HI_SHIFT;
273 clk |= SDHCI_CLOCK_INT_EN;
274 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
275
276 /* Wait max 20 ms */
277 timeout = 20;
278 while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
279 & SDHCI_CLOCK_INT_STABLE)) {
280 if (timeout == 0) {
281 printf("Internal clock never stabilised.\n");
282 return -1;
283 }
284 timeout--;
285 udelay(1000);
286 }
287
288 clk |= SDHCI_CLOCK_CARD_EN;
289 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
290 return 0;
291}
292
293static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
294{
295 u8 pwr = 0;
296
297 if (power != (unsigned short)-1) {
298 switch (1 << power) {
299 case MMC_VDD_165_195:
300 pwr = SDHCI_POWER_180;
301 break;
302 case MMC_VDD_29_30:
303 case MMC_VDD_30_31:
304 pwr = SDHCI_POWER_300;
305 break;
306 case MMC_VDD_32_33:
307 case MMC_VDD_33_34:
308 pwr = SDHCI_POWER_330;
309 break;
310 }
311 }
312
313 if (pwr == 0) {
314 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
315 return;
316 }
317
318 pwr |= SDHCI_POWER_ON;
319
320 sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
321}
322
323void sdhci_set_ios(struct mmc *mmc)
324{
325 u32 ctrl;
326 struct sdhci_host *host = (struct sdhci_host *)mmc->priv;
327
328 if (mmc->clock != host->clock)
329 sdhci_set_clock(mmc, mmc->clock);
330
331 /* Set bus width */
332 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
333 if (mmc->bus_width == 8) {
334 ctrl &= ~SDHCI_CTRL_4BITBUS;
335 if (host->version >= SDHCI_SPEC_300)
336 ctrl |= SDHCI_CTRL_8BITBUS;
337 } else {
338 if (host->version >= SDHCI_SPEC_300)
339 ctrl &= ~SDHCI_CTRL_8BITBUS;
340 if (mmc->bus_width == 4)
341 ctrl |= SDHCI_CTRL_4BITBUS;
342 else
343 ctrl &= ~SDHCI_CTRL_4BITBUS;
344 }
345
346 if (mmc->clock > 26000000)
347 ctrl |= SDHCI_CTRL_HISPD;
348 else
349 ctrl &= ~SDHCI_CTRL_HISPD;
350
351 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
352}
353
354int sdhci_init(struct mmc *mmc)
355{
356 struct sdhci_host *host = (struct sdhci_host *)mmc->priv;
357
358 if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) && !aligned_buffer) {
359 aligned_buffer = memalign(8, 512*1024);
360 if (!aligned_buffer) {
361 printf("Aligned buffer alloc failed!!!");
362 return -1;
363 }
364 }
365
366 /* Eable all state */
367 sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_ENABLE);
368 sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_SIGNAL_ENABLE);
369
370 sdhci_set_power(host, fls(mmc->voltages) - 1);
371
372 return 0;
373}
374
375int add_sdhci(struct sdhci_host *host, u32 max_clk, u32 min_clk)
376{
377 struct mmc *mmc;
378 unsigned int caps;
379
380 mmc = malloc(sizeof(struct mmc));
381 if (!mmc) {
382 printf("mmc malloc fail!\n");
383 return -1;
384 }
385
386 mmc->priv = host;
Lei Wen6cf1b172011-10-08 04:14:56 +0000387 host->mmc = mmc;
Lei Wenaf62a552011-06-28 21:50:06 +0000388
389 sprintf(mmc->name, "%s", host->name);
390 mmc->send_cmd = sdhci_send_command;
391 mmc->set_ios = sdhci_set_ios;
392 mmc->init = sdhci_init;
393
394 caps = sdhci_readl(host, SDHCI_CAPABILITIES);
395#ifdef CONFIG_MMC_SDMA
396 if (!(caps & SDHCI_CAN_DO_SDMA)) {
397 printf("Your controller don't support sdma!!\n");
398 return -1;
399 }
400#endif
401
402 if (max_clk)
403 mmc->f_max = max_clk;
404 else {
405 if (host->version >= SDHCI_SPEC_300)
406 mmc->f_max = (caps & SDHCI_CLOCK_V3_BASE_MASK)
407 >> SDHCI_CLOCK_BASE_SHIFT;
408 else
409 mmc->f_max = (caps & SDHCI_CLOCK_BASE_MASK)
410 >> SDHCI_CLOCK_BASE_SHIFT;
411 mmc->f_max *= 1000000;
412 }
413 if (mmc->f_max == 0) {
414 printf("Hardware doesn't specify base clock frequency\n");
415 return -1;
416 }
417 if (min_clk)
418 mmc->f_min = min_clk;
419 else {
420 if (host->version >= SDHCI_SPEC_300)
421 mmc->f_min = mmc->f_max / SDHCI_MAX_DIV_SPEC_300;
422 else
423 mmc->f_min = mmc->f_max / SDHCI_MAX_DIV_SPEC_200;
424 }
425
426 mmc->voltages = 0;
427 if (caps & SDHCI_CAN_VDD_330)
428 mmc->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34;
429 if (caps & SDHCI_CAN_VDD_300)
430 mmc->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31;
431 if (caps & SDHCI_CAN_VDD_180)
432 mmc->voltages |= MMC_VDD_165_195;
433 mmc->host_caps = MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_4BIT;
434 if (caps & SDHCI_CAN_DO_8BIT)
435 mmc->host_caps |= MMC_MODE_8BIT;
436
437 sdhci_reset(host, SDHCI_RESET_ALL);
438 mmc_register(mmc);
439
440 return 0;
441}