1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Marvell MMC/SD/SDIO driver 4 * 5 * (C) Copyright 2012-2014 6 * Marvell Semiconductor <www.marvell.com> 7 * Written-by: Maen Suleiman, Gerald Kerma 8 */ 9 10 #include <common.h> 11 #include <errno.h> 12 #include <malloc.h> 13 #include <part.h> 14 #include <mmc.h> 15 #include <asm/io.h> 16 #include <asm/arch/cpu.h> 17 #include <asm/arch/soc.h> 18 #include <mvebu_mmc.h> 19 20 DECLARE_GLOBAL_DATA_PTR; 21 22 #define DRIVER_NAME "MVEBU_MMC" 23 24 #define MVEBU_TARGET_DRAM 0 25 26 #define TIMEOUT_DELAY 5*CONFIG_SYS_HZ /* wait 5 seconds */ 27 28 static void mvebu_mmc_write(u32 offs, u32 val) 29 { 30 writel(val, CONFIG_SYS_MMC_BASE + (offs)); 31 } 32 33 static u32 mvebu_mmc_read(u32 offs) 34 { 35 return readl(CONFIG_SYS_MMC_BASE + (offs)); 36 } 37 38 static int mvebu_mmc_setup_data(struct mmc_data *data) 39 { 40 u32 ctrl_reg; 41 42 debug("%s, data %s : blocks=%d blksz=%d\n", DRIVER_NAME, 43 (data->flags & MMC_DATA_READ) ? "read" : "write", 44 data->blocks, data->blocksize); 45 46 /* default to maximum timeout */ 47 ctrl_reg = mvebu_mmc_read(SDIO_HOST_CTRL); 48 ctrl_reg |= SDIO_HOST_CTRL_TMOUT(SDIO_HOST_CTRL_TMOUT_MAX); 49 mvebu_mmc_write(SDIO_HOST_CTRL, ctrl_reg); 50 51 if (data->flags & MMC_DATA_READ) { 52 mvebu_mmc_write(SDIO_SYS_ADDR_LOW, (u32)data->dest & 0xffff); 53 mvebu_mmc_write(SDIO_SYS_ADDR_HI, (u32)data->dest >> 16); 54 } else { 55 mvebu_mmc_write(SDIO_SYS_ADDR_LOW, (u32)data->src & 0xffff); 56 mvebu_mmc_write(SDIO_SYS_ADDR_HI, (u32)data->src >> 16); 57 } 58 59 mvebu_mmc_write(SDIO_BLK_COUNT, data->blocks); 60 mvebu_mmc_write(SDIO_BLK_SIZE, data->blocksize); 61 62 return 0; 63 } 64 65 static int mvebu_mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, 66 struct mmc_data *data) 67 { 68 ulong start; 69 ushort waittype = 0; 70 ushort resptype = 0; 71 ushort xfertype = 0; 72 ushort resp_indx = 0; 73 74 debug("%s: cmdidx [0x%x] resp_type[0x%x] cmdarg[0x%x]\n", 75 DRIVER_NAME, cmd->cmdidx, cmd->resp_type, cmd->cmdarg); 76 77 debug("%s: cmd %d (hw state 0x%04x)\n", DRIVER_NAME, 78 cmd->cmdidx, mvebu_mmc_read(SDIO_HW_STATE)); 79 80 /* 81 * Hardware weirdness. The FIFO_EMPTY bit of the HW_STATE 82 * register is sometimes not set before a while when some 83 * "unusual" data block sizes are used (such as with the SWITCH 84 * command), even despite the fact that the XFER_DONE interrupt 85 * was raised. And if another data transfer starts before 86 * this bit comes to good sense (which eventually happens by 87 * itself) then the new transfer simply fails with a timeout. 88 */ 89 if (!(mvebu_mmc_read(SDIO_HW_STATE) & CMD_FIFO_EMPTY)) { 90 ushort hw_state, count = 0; 91 92 start = get_timer(0); 93 do { 94 hw_state = mvebu_mmc_read(SDIO_HW_STATE); 95 if ((get_timer(0) - start) > TIMEOUT_DELAY) { 96 printf("%s : FIFO_EMPTY bit missing\n", 97 DRIVER_NAME); 98 break; 99 } 100 count++; 101 } while (!(hw_state & CMD_FIFO_EMPTY)); 102 debug("%s *** wait for FIFO_EMPTY bit (hw=0x%04x, count=%d, jiffies=%ld)\n", 103 DRIVER_NAME, hw_state, count, (get_timer(0) - (start))); 104 } 105 106 /* Clear status */ 107 mvebu_mmc_write(SDIO_NOR_INTR_STATUS, SDIO_POLL_MASK); 108 mvebu_mmc_write(SDIO_ERR_INTR_STATUS, SDIO_POLL_MASK); 109 110 resptype = SDIO_CMD_INDEX(cmd->cmdidx); 111 112 /* Analyzing resptype/xfertype/waittype for the command */ 113 if (cmd->resp_type & MMC_RSP_BUSY) 114 resptype |= SDIO_CMD_RSP_48BUSY; 115 else if (cmd->resp_type & MMC_RSP_136) 116 resptype |= SDIO_CMD_RSP_136; 117 else if (cmd->resp_type & MMC_RSP_PRESENT) 118 resptype |= SDIO_CMD_RSP_48; 119 else 120 resptype |= SDIO_CMD_RSP_NONE; 121 122 if (cmd->resp_type & MMC_RSP_CRC) 123 resptype |= SDIO_CMD_CHECK_CMDCRC; 124 125 if (cmd->resp_type & MMC_RSP_OPCODE) 126 resptype |= SDIO_CMD_INDX_CHECK; 127 128 if (cmd->resp_type & MMC_RSP_PRESENT) { 129 resptype |= SDIO_UNEXPECTED_RESP; 130 waittype |= SDIO_NOR_UNEXP_RSP; 131 } 132 133 if (data) { 134 int err = mvebu_mmc_setup_data(data); 135 136 if (err) { 137 debug("%s: command DATA error :%x\n", 138 DRIVER_NAME, err); 139 return err; 140 } 141 142 resptype |= SDIO_CMD_DATA_PRESENT | SDIO_CMD_CHECK_DATACRC16; 143 xfertype |= SDIO_XFER_MODE_HW_WR_DATA_EN; 144 if (data->flags & MMC_DATA_READ) { 145 xfertype |= SDIO_XFER_MODE_TO_HOST; 146 waittype = SDIO_NOR_DMA_INI; 147 } else { 148 waittype |= SDIO_NOR_XFER_DONE; 149 } 150 } else { 151 waittype |= SDIO_NOR_CMD_DONE; 152 } 153 154 /* Setting cmd arguments */ 155 mvebu_mmc_write(SDIO_ARG_LOW, cmd->cmdarg & 0xffff); 156 mvebu_mmc_write(SDIO_ARG_HI, cmd->cmdarg >> 16); 157 158 /* Setting Xfer mode */ 159 mvebu_mmc_write(SDIO_XFER_MODE, xfertype); 160 161 /* Sending command */ 162 mvebu_mmc_write(SDIO_CMD, resptype); 163 164 start = get_timer(0); 165 166 while (!((mvebu_mmc_read(SDIO_NOR_INTR_STATUS)) & waittype)) { 167 if (mvebu_mmc_read(SDIO_NOR_INTR_STATUS) & SDIO_NOR_ERROR) { 168 debug("%s: error! cmdidx : %d, err reg: %04x\n", 169 DRIVER_NAME, cmd->cmdidx, 170 mvebu_mmc_read(SDIO_ERR_INTR_STATUS)); 171 if (mvebu_mmc_read(SDIO_ERR_INTR_STATUS) & 172 (SDIO_ERR_CMD_TIMEOUT | SDIO_ERR_DATA_TIMEOUT)) { 173 debug("%s: command READ timed out\n", 174 DRIVER_NAME); 175 return -ETIMEDOUT; 176 } 177 debug("%s: command READ error\n", DRIVER_NAME); 178 return -ECOMM; 179 } 180 181 if ((get_timer(0) - start) > TIMEOUT_DELAY) { 182 debug("%s: command timed out\n", DRIVER_NAME); 183 return -ETIMEDOUT; 184 } 185 } 186 187 /* Handling response */ 188 if (cmd->resp_type & MMC_RSP_136) { 189 uint response[8]; 190 191 for (resp_indx = 0; resp_indx < 8; resp_indx++) 192 response[resp_indx] 193 = mvebu_mmc_read(SDIO_RSP(resp_indx)); 194 195 cmd->response[0] = ((response[0] & 0x03ff) << 22) | 196 ((response[1] & 0xffff) << 6) | 197 ((response[2] & 0xfc00) >> 10); 198 cmd->response[1] = ((response[2] & 0x03ff) << 22) | 199 ((response[3] & 0xffff) << 6) | 200 ((response[4] & 0xfc00) >> 10); 201 cmd->response[2] = ((response[4] & 0x03ff) << 22) | 202 ((response[5] & 0xffff) << 6) | 203 ((response[6] & 0xfc00) >> 10); 204 cmd->response[3] = ((response[6] & 0x03ff) << 22) | 205 ((response[7] & 0x3fff) << 8); 206 } else if (cmd->resp_type & MMC_RSP_PRESENT) { 207 uint response[3]; 208 209 for (resp_indx = 0; resp_indx < 3; resp_indx++) 210 response[resp_indx] 211 = mvebu_mmc_read(SDIO_RSP(resp_indx)); 212 213 cmd->response[0] = ((response[2] & 0x003f) << (8 - 8)) | 214 ((response[1] & 0xffff) << (14 - 8)) | 215 ((response[0] & 0x03ff) << (30 - 8)); 216 cmd->response[1] = ((response[0] & 0xfc00) >> 10); 217 cmd->response[2] = 0; 218 cmd->response[3] = 0; 219 } else { 220 cmd->response[0] = 0; 221 cmd->response[1] = 0; 222 cmd->response[2] = 0; 223 cmd->response[3] = 0; 224 } 225 226 debug("%s: resp[0x%x] ", DRIVER_NAME, cmd->resp_type); 227 debug("[0x%x] ", cmd->response[0]); 228 debug("[0x%x] ", cmd->response[1]); 229 debug("[0x%x] ", cmd->response[2]); 230 debug("[0x%x] ", cmd->response[3]); 231 debug("\n"); 232 233 if (mvebu_mmc_read(SDIO_ERR_INTR_STATUS) & 234 (SDIO_ERR_CMD_TIMEOUT | SDIO_ERR_DATA_TIMEOUT)) 235 return -ETIMEDOUT; 236 237 return 0; 238 } 239 240 static void mvebu_mmc_power_up(void) 241 { 242 debug("%s: power up\n", DRIVER_NAME); 243 244 /* disable interrupts */ 245 mvebu_mmc_write(SDIO_NOR_INTR_EN, 0); 246 mvebu_mmc_write(SDIO_ERR_INTR_EN, 0); 247 248 /* SW reset */ 249 mvebu_mmc_write(SDIO_SW_RESET, SDIO_SW_RESET_NOW); 250 251 mvebu_mmc_write(SDIO_XFER_MODE, 0); 252 253 /* enable status */ 254 mvebu_mmc_write(SDIO_NOR_STATUS_EN, SDIO_POLL_MASK); 255 mvebu_mmc_write(SDIO_ERR_STATUS_EN, SDIO_POLL_MASK); 256 257 /* enable interrupts status */ 258 mvebu_mmc_write(SDIO_NOR_INTR_STATUS, SDIO_POLL_MASK); 259 mvebu_mmc_write(SDIO_ERR_INTR_STATUS, SDIO_POLL_MASK); 260 } 261 262 static void mvebu_mmc_set_clk(unsigned int clock) 263 { 264 unsigned int m; 265 266 if (clock == 0) { 267 debug("%s: clock off\n", DRIVER_NAME); 268 mvebu_mmc_write(SDIO_XFER_MODE, SDIO_XFER_MODE_STOP_CLK); 269 mvebu_mmc_write(SDIO_CLK_DIV, MVEBU_MMC_BASE_DIV_MAX); 270 } else { 271 m = MVEBU_MMC_BASE_FAST_CLOCK/(2*clock) - 1; 272 if (m > MVEBU_MMC_BASE_DIV_MAX) 273 m = MVEBU_MMC_BASE_DIV_MAX; 274 mvebu_mmc_write(SDIO_CLK_DIV, m & MVEBU_MMC_BASE_DIV_MAX); 275 debug("%s: clock (%d) div : %d\n", DRIVER_NAME, clock, m); 276 } 277 } 278 279 static void mvebu_mmc_set_bus(unsigned int bus) 280 { 281 u32 ctrl_reg = 0; 282 283 ctrl_reg = mvebu_mmc_read(SDIO_HOST_CTRL); 284 ctrl_reg &= ~SDIO_HOST_CTRL_DATA_WIDTH_4_BITS; 285 286 switch (bus) { 287 case 4: 288 ctrl_reg |= SDIO_HOST_CTRL_DATA_WIDTH_4_BITS; 289 break; 290 case 1: 291 default: 292 ctrl_reg |= SDIO_HOST_CTRL_DATA_WIDTH_1_BIT; 293 } 294 295 /* default transfer mode */ 296 ctrl_reg |= SDIO_HOST_CTRL_BIG_ENDIAN; 297 ctrl_reg &= ~SDIO_HOST_CTRL_LSB_FIRST; 298 299 /* default to maximum timeout */ 300 ctrl_reg |= SDIO_HOST_CTRL_TMOUT(SDIO_HOST_CTRL_TMOUT_MAX); 301 ctrl_reg |= SDIO_HOST_CTRL_TMOUT_EN; 302 303 ctrl_reg |= SDIO_HOST_CTRL_PUSH_PULL_EN; 304 305 ctrl_reg |= SDIO_HOST_CTRL_CARD_TYPE_MEM_ONLY; 306 307 debug("%s: ctrl 0x%04x: %s %s %s\n", DRIVER_NAME, ctrl_reg, 308 (ctrl_reg & SDIO_HOST_CTRL_PUSH_PULL_EN) ? 309 "push-pull" : "open-drain", 310 (ctrl_reg & SDIO_HOST_CTRL_DATA_WIDTH_4_BITS) ? 311 "4bit-width" : "1bit-width", 312 (ctrl_reg & SDIO_HOST_CTRL_HI_SPEED_EN) ? 313 "high-speed" : ""); 314 315 mvebu_mmc_write(SDIO_HOST_CTRL, ctrl_reg); 316 } 317 318 static int mvebu_mmc_set_ios(struct mmc *mmc) 319 { 320 debug("%s: bus[%d] clock[%d]\n", DRIVER_NAME, 321 mmc->bus_width, mmc->clock); 322 mvebu_mmc_set_bus(mmc->bus_width); 323 mvebu_mmc_set_clk(mmc->clock); 324 325 return 0; 326 } 327 328 /* 329 * Set window register. 330 */ 331 static void mvebu_window_setup(void) 332 { 333 int i; 334 335 for (i = 0; i < 4; i++) { 336 mvebu_mmc_write(WINDOW_CTRL(i), 0); 337 mvebu_mmc_write(WINDOW_BASE(i), 0); 338 } 339 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { 340 u32 size, base, attrib; 341 342 /* Enable DRAM bank */ 343 switch (i) { 344 case 0: 345 attrib = KWCPU_ATTR_DRAM_CS0; 346 break; 347 case 1: 348 attrib = KWCPU_ATTR_DRAM_CS1; 349 break; 350 case 2: 351 attrib = KWCPU_ATTR_DRAM_CS2; 352 break; 353 case 3: 354 attrib = KWCPU_ATTR_DRAM_CS3; 355 break; 356 default: 357 /* invalide bank, disable access */ 358 attrib = 0; 359 break; 360 } 361 362 size = gd->bd->bi_dram[i].size; 363 base = gd->bd->bi_dram[i].start; 364 if (size && attrib) { 365 mvebu_mmc_write(WINDOW_CTRL(i), 366 MVCPU_WIN_CTRL_DATA(size, 367 MVEBU_TARGET_DRAM, 368 attrib, 369 MVCPU_WIN_ENABLE)); 370 } else { 371 mvebu_mmc_write(WINDOW_CTRL(i), MVCPU_WIN_DISABLE); 372 } 373 mvebu_mmc_write(WINDOW_BASE(i), base); 374 } 375 } 376 377 static int mvebu_mmc_initialize(struct mmc *mmc) 378 { 379 debug("%s: mvebu_mmc_initialize\n", DRIVER_NAME); 380 381 /* 382 * Setting host parameters 383 * Initial Host Ctrl : Timeout : max , Normal Speed mode, 384 * 4-bit data mode, Big Endian, SD memory Card, Push_pull CMD Line 385 */ 386 mvebu_mmc_write(SDIO_HOST_CTRL, 387 SDIO_HOST_CTRL_TMOUT(SDIO_HOST_CTRL_TMOUT_MAX) | 388 SDIO_HOST_CTRL_DATA_WIDTH_4_BITS | 389 SDIO_HOST_CTRL_BIG_ENDIAN | 390 SDIO_HOST_CTRL_PUSH_PULL_EN | 391 SDIO_HOST_CTRL_CARD_TYPE_MEM_ONLY); 392 393 mvebu_mmc_write(SDIO_CLK_CTRL, 0); 394 395 /* enable status */ 396 mvebu_mmc_write(SDIO_NOR_STATUS_EN, SDIO_POLL_MASK); 397 mvebu_mmc_write(SDIO_ERR_STATUS_EN, SDIO_POLL_MASK); 398 399 /* disable interrupts */ 400 mvebu_mmc_write(SDIO_NOR_INTR_EN, 0); 401 mvebu_mmc_write(SDIO_ERR_INTR_EN, 0); 402 403 mvebu_window_setup(); 404 405 /* SW reset */ 406 mvebu_mmc_write(SDIO_SW_RESET, SDIO_SW_RESET_NOW); 407 408 return 0; 409 } 410 411 static const struct mmc_ops mvebu_mmc_ops = { 412 .send_cmd = mvebu_mmc_send_cmd, 413 .set_ios = mvebu_mmc_set_ios, 414 .init = mvebu_mmc_initialize, 415 }; 416 417 static struct mmc_config mvebu_mmc_cfg = { 418 .name = DRIVER_NAME, 419 .ops = &mvebu_mmc_ops, 420 .f_min = MVEBU_MMC_BASE_FAST_CLOCK / MVEBU_MMC_BASE_DIV_MAX, 421 .f_max = MVEBU_MMC_CLOCKRATE_MAX, 422 .voltages = MMC_VDD_32_33 | MMC_VDD_33_34, 423 .host_caps = MMC_MODE_4BIT | MMC_MODE_HS | 424 MMC_MODE_HS_52MHz, 425 .part_type = PART_TYPE_DOS, 426 .b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT, 427 }; 428 429 int mvebu_mmc_init(bd_t *bis) 430 { 431 struct mmc *mmc; 432 433 mvebu_mmc_power_up(); 434 435 mmc = mmc_create(&mvebu_mmc_cfg, bis); 436 if (mmc == NULL) 437 return -1; 438 439 return 0; 440 } 441