1 /* 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 32 void *aligned_buffer; 33 34 static 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 51 static 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 68 static 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 81 static int sdhci_transfer_data(struct sdhci_host *host, struct mmc_data *data, 82 unsigned int start_addr) 83 { 84 unsigned int stat, rdy, mask, timeout, block = 0; 85 #ifdef CONFIG_MMC_SDMA 86 unsigned char ctrl; 87 ctrl = sdhci_readl(host, SDHCI_HOST_CONTROL); 88 ctrl &= ~SDHCI_CTRL_DMA_MASK; 89 ctrl |= SDHCI_CTRL_SDMA; 90 sdhci_writel(host, ctrl, SDHCI_HOST_CONTROL); 91 #endif 92 93 timeout = 1000000; 94 rdy = SDHCI_INT_SPACE_AVAIL | SDHCI_INT_DATA_AVAIL; 95 mask = SDHCI_DATA_AVAILABLE | SDHCI_SPACE_AVAILABLE; 96 do { 97 stat = sdhci_readl(host, SDHCI_INT_STATUS); 98 if (stat & SDHCI_INT_ERROR) { 99 printf("Error detected in status(0x%X)!\n", stat); 100 return -1; 101 } 102 if (stat & rdy) { 103 if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & mask)) 104 continue; 105 sdhci_writel(host, rdy, SDHCI_INT_STATUS); 106 sdhci_transfer_pio(host, data); 107 data->dest += data->blocksize; 108 if (++block >= data->blocks) 109 break; 110 } 111 #ifdef CONFIG_MMC_SDMA 112 if (stat & SDHCI_INT_DMA_END) { 113 sdhci_writel(host, SDHCI_INT_DMA_END, SDHCI_INT_STATUS); 114 start_addr &= ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1); 115 start_addr += SDHCI_DEFAULT_BOUNDARY_SIZE; 116 sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS); 117 } 118 #endif 119 if (timeout-- > 0) 120 udelay(10); 121 else { 122 printf("Transfer data timeout\n"); 123 return -1; 124 } 125 } while (!(stat & SDHCI_INT_DATA_END)); 126 return 0; 127 } 128 129 int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd, 130 struct mmc_data *data) 131 { 132 struct sdhci_host *host = (struct sdhci_host *)mmc->priv; 133 unsigned int stat = 0; 134 int ret = 0; 135 int trans_bytes = 0, is_aligned = 1; 136 u32 mask, flags, mode; 137 unsigned int timeout, start_addr = 0; 138 unsigned int retry = 10000; 139 140 /* Wait max 10 ms */ 141 timeout = 10; 142 143 sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_STATUS); 144 mask = SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT; 145 146 /* We shouldn't wait for data inihibit for stop commands, even 147 though they might use busy signaling */ 148 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION) 149 mask &= ~SDHCI_DATA_INHIBIT; 150 151 while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) { 152 if (timeout == 0) { 153 printf("Controller never released inhibit bit(s).\n"); 154 return COMM_ERR; 155 } 156 timeout--; 157 udelay(1000); 158 } 159 160 mask = SDHCI_INT_RESPONSE; 161 if (!(cmd->resp_type & MMC_RSP_PRESENT)) 162 flags = SDHCI_CMD_RESP_NONE; 163 else if (cmd->resp_type & MMC_RSP_136) 164 flags = SDHCI_CMD_RESP_LONG; 165 else if (cmd->resp_type & MMC_RSP_BUSY) { 166 flags = SDHCI_CMD_RESP_SHORT_BUSY; 167 mask |= SDHCI_INT_DATA_END; 168 } else 169 flags = SDHCI_CMD_RESP_SHORT; 170 171 if (cmd->resp_type & MMC_RSP_CRC) 172 flags |= SDHCI_CMD_CRC; 173 if (cmd->resp_type & MMC_RSP_OPCODE) 174 flags |= SDHCI_CMD_INDEX; 175 if (data) 176 flags |= SDHCI_CMD_DATA; 177 178 /*Set Transfer mode regarding to data flag*/ 179 if (data != 0) { 180 sdhci_writeb(host, 0xe, SDHCI_TIMEOUT_CONTROL); 181 mode = SDHCI_TRNS_BLK_CNT_EN; 182 trans_bytes = data->blocks * data->blocksize; 183 if (data->blocks > 1) 184 mode |= SDHCI_TRNS_MULTI; 185 186 if (data->flags == MMC_DATA_READ) 187 mode |= SDHCI_TRNS_READ; 188 189 #ifdef CONFIG_MMC_SDMA 190 if (data->flags == MMC_DATA_READ) 191 start_addr = (unsigned int)data->dest; 192 else 193 start_addr = (unsigned int)data->src; 194 if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) && 195 (start_addr & 0x7) != 0x0) { 196 is_aligned = 0; 197 start_addr = (unsigned int)aligned_buffer; 198 if (data->flags != MMC_DATA_READ) 199 memcpy(aligned_buffer, data->src, trans_bytes); 200 } 201 202 sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS); 203 mode |= SDHCI_TRNS_DMA; 204 #endif 205 sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, 206 data->blocksize), 207 SDHCI_BLOCK_SIZE); 208 sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT); 209 sdhci_writew(host, mode, SDHCI_TRANSFER_MODE); 210 } 211 212 sdhci_writel(host, cmd->cmdarg, SDHCI_ARGUMENT); 213 #ifdef CONFIG_MMC_SDMA 214 flush_cache(start_addr, trans_bytes); 215 #endif 216 sdhci_writew(host, SDHCI_MAKE_CMD(cmd->cmdidx, flags), SDHCI_COMMAND); 217 do { 218 stat = sdhci_readl(host, SDHCI_INT_STATUS); 219 if (stat & SDHCI_INT_ERROR) 220 break; 221 if (--retry == 0) 222 break; 223 } while ((stat & mask) != mask); 224 225 if (retry == 0) { 226 if (host->quirks & SDHCI_QUIRK_BROKEN_R1B) 227 return 0; 228 else { 229 printf("Timeout for status update!\n"); 230 return TIMEOUT; 231 } 232 } 233 234 if ((stat & (SDHCI_INT_ERROR | mask)) == mask) { 235 sdhci_cmd_done(host, cmd); 236 sdhci_writel(host, mask, SDHCI_INT_STATUS); 237 } else 238 ret = -1; 239 240 if (!ret && data) 241 ret = sdhci_transfer_data(host, data, start_addr); 242 243 stat = sdhci_readl(host, SDHCI_INT_STATUS); 244 sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_STATUS); 245 if (!ret) { 246 if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) && 247 !is_aligned && (data->flags == MMC_DATA_READ)) 248 memcpy(data->dest, aligned_buffer, trans_bytes); 249 return 0; 250 } 251 252 sdhci_reset(host, SDHCI_RESET_CMD); 253 sdhci_reset(host, SDHCI_RESET_DATA); 254 if (stat & SDHCI_INT_TIMEOUT) 255 return TIMEOUT; 256 else 257 return COMM_ERR; 258 } 259 260 static int sdhci_set_clock(struct mmc *mmc, unsigned int clock) 261 { 262 struct sdhci_host *host = (struct sdhci_host *)mmc->priv; 263 unsigned int div, clk, timeout; 264 265 sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); 266 267 if (clock == 0) 268 return 0; 269 270 if ((host->version & SDHCI_SPEC_VER_MASK) >= SDHCI_SPEC_300) { 271 /* Version 3.00 divisors must be a multiple of 2. */ 272 if (mmc->f_max <= clock) 273 div = 1; 274 else { 275 for (div = 2; div < SDHCI_MAX_DIV_SPEC_300; div += 2) { 276 if ((mmc->f_max / div) <= clock) 277 break; 278 } 279 } 280 } else { 281 /* Version 2.00 divisors must be a power of 2. */ 282 for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) { 283 if ((mmc->f_max / div) <= clock) 284 break; 285 } 286 } 287 div >>= 1; 288 289 if (host->set_clock) 290 host->set_clock(host->index, div); 291 292 clk = (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT; 293 clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN) 294 << SDHCI_DIVIDER_HI_SHIFT; 295 clk |= SDHCI_CLOCK_INT_EN; 296 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 297 298 /* Wait max 20 ms */ 299 timeout = 20; 300 while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL)) 301 & SDHCI_CLOCK_INT_STABLE)) { 302 if (timeout == 0) { 303 printf("Internal clock never stabilised.\n"); 304 return -1; 305 } 306 timeout--; 307 udelay(1000); 308 } 309 310 clk |= SDHCI_CLOCK_CARD_EN; 311 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 312 return 0; 313 } 314 315 static void sdhci_set_power(struct sdhci_host *host, unsigned short power) 316 { 317 u8 pwr = 0; 318 319 if (power != (unsigned short)-1) { 320 switch (1 << power) { 321 case MMC_VDD_165_195: 322 pwr = SDHCI_POWER_180; 323 break; 324 case MMC_VDD_29_30: 325 case MMC_VDD_30_31: 326 pwr = SDHCI_POWER_300; 327 break; 328 case MMC_VDD_32_33: 329 case MMC_VDD_33_34: 330 pwr = SDHCI_POWER_330; 331 break; 332 } 333 } 334 335 if (pwr == 0) { 336 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); 337 return; 338 } 339 340 pwr |= SDHCI_POWER_ON; 341 342 sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); 343 } 344 345 void sdhci_set_ios(struct mmc *mmc) 346 { 347 u32 ctrl; 348 struct sdhci_host *host = (struct sdhci_host *)mmc->priv; 349 350 if (host->set_control_reg) 351 host->set_control_reg(host); 352 353 if (mmc->clock != host->clock) 354 sdhci_set_clock(mmc, mmc->clock); 355 356 /* Set bus width */ 357 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); 358 if (mmc->bus_width == 8) { 359 ctrl &= ~SDHCI_CTRL_4BITBUS; 360 if ((host->version & SDHCI_SPEC_VER_MASK) >= SDHCI_SPEC_300) 361 ctrl |= SDHCI_CTRL_8BITBUS; 362 } else { 363 if ((host->version & SDHCI_SPEC_VER_MASK) >= SDHCI_SPEC_300) 364 ctrl &= ~SDHCI_CTRL_8BITBUS; 365 if (mmc->bus_width == 4) 366 ctrl |= SDHCI_CTRL_4BITBUS; 367 else 368 ctrl &= ~SDHCI_CTRL_4BITBUS; 369 } 370 371 if (mmc->clock > 26000000) 372 ctrl |= SDHCI_CTRL_HISPD; 373 else 374 ctrl &= ~SDHCI_CTRL_HISPD; 375 376 if (host->quirks & SDHCI_QUIRK_NO_HISPD_BIT) 377 ctrl &= ~SDHCI_CTRL_HISPD; 378 379 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); 380 } 381 382 int sdhci_init(struct mmc *mmc) 383 { 384 struct sdhci_host *host = (struct sdhci_host *)mmc->priv; 385 386 if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) && !aligned_buffer) { 387 aligned_buffer = memalign(8, 512*1024); 388 if (!aligned_buffer) { 389 printf("Aligned buffer alloc failed!!!"); 390 return -1; 391 } 392 } 393 394 sdhci_set_power(host, fls(mmc->voltages) - 1); 395 396 if (host->quirks & SDHCI_QUIRK_NO_CD) { 397 unsigned int status; 398 399 sdhci_writel(host, SDHCI_CTRL_CD_TEST_INS | SDHCI_CTRL_CD_TEST, 400 SDHCI_HOST_CONTROL); 401 402 status = sdhci_readl(host, SDHCI_PRESENT_STATE); 403 while ((!(status & SDHCI_CARD_PRESENT)) || 404 (!(status & SDHCI_CARD_STATE_STABLE)) || 405 (!(status & SDHCI_CARD_DETECT_PIN_LEVEL))) 406 status = sdhci_readl(host, SDHCI_PRESENT_STATE); 407 } 408 409 /* Eable all state */ 410 sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_ENABLE); 411 sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_SIGNAL_ENABLE); 412 413 return 0; 414 } 415 416 int add_sdhci(struct sdhci_host *host, u32 max_clk, u32 min_clk) 417 { 418 struct mmc *mmc; 419 unsigned int caps; 420 421 mmc = malloc(sizeof(struct mmc)); 422 if (!mmc) { 423 printf("mmc malloc fail!\n"); 424 return -1; 425 } 426 427 mmc->priv = host; 428 host->mmc = mmc; 429 430 sprintf(mmc->name, "%s", host->name); 431 mmc->send_cmd = sdhci_send_command; 432 mmc->set_ios = sdhci_set_ios; 433 mmc->init = sdhci_init; 434 mmc->getcd = NULL; 435 436 caps = sdhci_readl(host, SDHCI_CAPABILITIES); 437 #ifdef CONFIG_MMC_SDMA 438 if (!(caps & SDHCI_CAN_DO_SDMA)) { 439 printf("Your controller don't support sdma!!\n"); 440 return -1; 441 } 442 #endif 443 444 if (max_clk) 445 mmc->f_max = max_clk; 446 else { 447 if ((host->version & SDHCI_SPEC_VER_MASK) >= SDHCI_SPEC_300) 448 mmc->f_max = (caps & SDHCI_CLOCK_V3_BASE_MASK) 449 >> SDHCI_CLOCK_BASE_SHIFT; 450 else 451 mmc->f_max = (caps & SDHCI_CLOCK_BASE_MASK) 452 >> SDHCI_CLOCK_BASE_SHIFT; 453 mmc->f_max *= 1000000; 454 } 455 if (mmc->f_max == 0) { 456 printf("Hardware doesn't specify base clock frequency\n"); 457 return -1; 458 } 459 if (min_clk) 460 mmc->f_min = min_clk; 461 else { 462 if ((host->version & SDHCI_SPEC_VER_MASK) >= SDHCI_SPEC_300) 463 mmc->f_min = mmc->f_max / SDHCI_MAX_DIV_SPEC_300; 464 else 465 mmc->f_min = mmc->f_max / SDHCI_MAX_DIV_SPEC_200; 466 } 467 468 mmc->voltages = 0; 469 if (caps & SDHCI_CAN_VDD_330) 470 mmc->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34; 471 if (caps & SDHCI_CAN_VDD_300) 472 mmc->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31; 473 if (caps & SDHCI_CAN_VDD_180) 474 mmc->voltages |= MMC_VDD_165_195; 475 476 if (host->quirks & SDHCI_QUIRK_BROKEN_VOLTAGE) 477 mmc->voltages |= host->voltages; 478 479 mmc->host_caps = MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_4BIT; 480 if (caps & SDHCI_CAN_DO_8BIT) 481 mmc->host_caps |= MMC_MODE_8BIT; 482 if (host->host_caps) 483 mmc->host_caps |= host->host_caps; 484 485 sdhci_reset(host, SDHCI_RESET_ALL); 486 mmc_register(mmc); 487 488 return 0; 489 } 490