/* * (C) Copyright 2003 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <config.h> #include <common.h> #include <mmc.h> #include <asm/errno.h> #include <asm/arch/hardware.h> #include <part.h> #include <asm/io.h> #include "pxa_mmc.h" extern int fat_register_device(block_dev_desc_t * dev_desc, int part_no); static block_dev_desc_t mmc_dev; block_dev_desc_t *mmc_get_dev(int dev) { return ((block_dev_desc_t *) & mmc_dev); } /* * FIXME needs to read cid and csd info to determine block size * and other parameters */ static uchar mmc_buf[MMC_BLOCK_SIZE]; static uchar spec_ver; static int mmc_ready = 0; static int wide = 0; static uint32_t * /****************************************************/ mmc_cmd(ushort cmd, ushort argh, ushort argl, ushort cmdat) /****************************************************/ { static uint32_t resp[4], a, b, c; ulong status; int i; debug("mmc_cmd %u 0x%04x 0x%04x 0x%04x\n", cmd, argh, argl, cmdat | wide); writel(MMC_STRPCL_STOP_CLK, MMC_STRPCL); writel(~MMC_I_MASK_CLK_IS_OFF, MMC_I_MASK); while (!(readl(MMC_I_REG) & MMC_I_REG_CLK_IS_OFF)) ; writel(cmd, MMC_CMD); writel(argh, MMC_ARGH); writel(argl, MMC_ARGL); writel(cmdat | wide, MMC_CMDAT); writel(~MMC_I_MASK_END_CMD_RES, MMC_I_MASK); writel(MMC_STRPCL_START_CLK, MMC_STRPCL); while (!(readl(MMC_I_REG) & MMC_I_REG_END_CMD_RES)) ; status = readl(MMC_STAT); debug("MMC status 0x%08x\n", status); if (status & MMC_STAT_TIME_OUT_RESPONSE) { return 0; } /* Linux says: * Did I mention this is Sick. We always need to * discard the upper 8 bits of the first 16-bit word. */ a = (readl(MMC_RES) & 0xffff); for (i = 0; i < 4; i++) { b = (readl(MMC_RES) & 0xffff); c = (readl(MMC_RES) & 0xffff); resp[i] = (a << 24) | (b << 8) | (c >> 8); a = c; debug("MMC resp[%d] = %#08x\n", i, resp[i]); } return resp; } int /****************************************************/ mmc_block_read(uchar * dst, ulong src, ulong len) /****************************************************/ { ushort argh, argl; ulong status; if (len == 0) { return 0; } debug("mmc_block_rd dst %lx src %lx len %d\n", (ulong) dst, src, len); argh = len >> 16; argl = len & 0xffff; /* set block len */ mmc_cmd(MMC_CMD_SET_BLOCKLEN, argh, argl, MMC_CMDAT_R1); /* send read command */ argh = src >> 16; argl = src & 0xffff; writel(MMC_STRPCL_STOP_CLK, MMC_STRPCL); writel(0xffff, MMC_RDTO); writel(1, MMC_NOB); writel(len, MMC_BLKLEN); mmc_cmd(MMC_CMD_READ_SINGLE_BLOCK, argh, argl, MMC_CMDAT_R1 | MMC_CMDAT_READ | MMC_CMDAT_BLOCK | MMC_CMDAT_DATA_EN); writel(~MMC_I_MASK_RXFIFO_RD_REQ, MMC_I_MASK); while (len) { if (readl(MMC_I_REG) & MMC_I_REG_RXFIFO_RD_REQ) { #if defined(CONFIG_PXA27X) || defined(CONFIG_CPU_MONAHANS) int i; for (i = min(len, 32); i; i--) { *dst++ = readb(MMC_RXFIFO); len--; } #else *dst++ = readb(MMC_RXFIFO); len--; #endif } status = readl(MMC_STAT); if (status & MMC_STAT_ERRORS) { printf("MMC_STAT error %lx\n", status); return -1; } } writel(~MMC_I_MASK_DATA_TRAN_DONE, MMC_I_MASK); while (!(readl(MMC_I_REG) & MMC_I_REG_DATA_TRAN_DONE)) ; status = readl(MMC_STAT); if (status & MMC_STAT_ERRORS) { printf("MMC_STAT error %lx\n", status); return -1; } return 0; } int /****************************************************/ mmc_block_write(ulong dst, uchar * src, int len) /****************************************************/ { ushort argh, argl; ulong status; if (len == 0) { return 0; } debug("mmc_block_wr dst %lx src %lx len %d\n", dst, (ulong) src, len); argh = len >> 16; argl = len & 0xffff; /* set block len */ mmc_cmd(MMC_CMD_SET_BLOCKLEN, argh, argl, MMC_CMDAT_R1); /* send write command */ argh = dst >> 16; argl = dst & 0xffff; writel(MMC_STRPCL_STOP_CLK, MMC_STRPCL); writel(1, MMC_NOB); writel(len, MMC_BLKLEN); mmc_cmd(MMC_CMD_WRITE_SINGLE_BLOCK, argh, argl, MMC_CMDAT_R1 | MMC_CMDAT_WRITE | MMC_CMDAT_BLOCK | MMC_CMDAT_DATA_EN); writel(~MMC_I_MASK_TXFIFO_WR_REQ, MMC_I_MASK); while (len) { if (readl(MMC_I_REG) & MMC_I_REG_TXFIFO_WR_REQ) { int i, bytes = min(32, len); for (i = 0; i < bytes; i++) { writel(*src++, MMC_TXFIFO); } if (bytes < 32) { writel(MMC_PRTBUF_BUF_PART_FULL, MMC_PRTBUF); } len -= bytes; } status = readl(MMC_STAT); if (status & MMC_STAT_ERRORS) { printf("MMC_STAT error %lx\n", status); return -1; } } writel(~MMC_I_MASK_DATA_TRAN_DONE, MMC_I_MASK); while (!(readl(MMC_I_REG) & MMC_I_REG_DATA_TRAN_DONE)) ; writel(~MMC_I_MASK_PRG_DONE, MMC_I_MASK); while (!(readl(MMC_I_REG) & MMC_I_REG_PRG_DONE)) ; status = readl(MMC_STAT); if (status & MMC_STAT_ERRORS) { printf("MMC_STAT error %lx\n", status); return -1; } return 0; } int /****************************************************/ pxa_mmc_read(long src, uchar * dst, int size) /****************************************************/ { ulong end, part_start, part_end, part_len, aligned_start, aligned_end; ulong mmc_block_size, mmc_block_address; if (size == 0) { return 0; } if (!mmc_ready) { printf("Please initial the MMC first\n"); return -1; } mmc_block_size = MMC_BLOCK_SIZE; mmc_block_address = ~(mmc_block_size - 1); src -= CONFIG_SYS_MMC_BASE; end = src + size; part_start = ~mmc_block_address & src; part_end = ~mmc_block_address & end; aligned_start = mmc_block_address & src; aligned_end = mmc_block_address & end; /* all block aligned accesses */ debug ("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n", src, (ulong) dst, end, part_start, part_end, aligned_start, aligned_end); if (part_start) { part_len = mmc_block_size - part_start; debug ("ps src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n", src, (ulong) dst, end, part_start, part_end, aligned_start, aligned_end); if ((mmc_block_read(mmc_buf, aligned_start, mmc_block_size)) < 0) { return -1; } memcpy(dst, mmc_buf + part_start, part_len); dst += part_len; src += part_len; } debug ("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n", src, (ulong) dst, end, part_start, part_end, aligned_start, aligned_end); for (; src < aligned_end; src += mmc_block_size, dst += mmc_block_size) { debug ("al src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n", src, (ulong) dst, end, part_start, part_end, aligned_start, aligned_end); if ((mmc_block_read((uchar *) (dst), src, mmc_block_size)) < 0) { return -1; } } debug ("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n", src, (ulong) dst, end, part_start, part_end, aligned_start, aligned_end); if (part_end && src < end) { debug ("pe src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n", src, (ulong) dst, end, part_start, part_end, aligned_start, aligned_end); if ((mmc_block_read(mmc_buf, aligned_end, mmc_block_size)) < 0) { return -1; } memcpy(dst, mmc_buf, part_end); } return 0; } int /****************************************************/ pxa_mmc_write(uchar * src, ulong dst, int size) /****************************************************/ { ulong end, part_start, part_end, part_len, aligned_start, aligned_end; ulong mmc_block_size, mmc_block_address; if (size == 0) { return 0; } if (!mmc_ready) { printf("Please initial the MMC first\n"); return -1; } mmc_block_size = MMC_BLOCK_SIZE; mmc_block_address = ~(mmc_block_size - 1); dst -= CONFIG_SYS_MMC_BASE; end = dst + size; part_start = ~mmc_block_address & dst; part_end = ~mmc_block_address & end; aligned_start = mmc_block_address & dst; aligned_end = mmc_block_address & end; /* all block aligned accesses */ debug ("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n", src, (ulong) dst, end, part_start, part_end, aligned_start, aligned_end); if (part_start) { part_len = mmc_block_size - part_start; debug ("ps src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n", (ulong) src, dst, end, part_start, part_end, aligned_start, aligned_end); if ((mmc_block_read(mmc_buf, aligned_start, mmc_block_size)) < 0) { return -1; } memcpy(mmc_buf + part_start, src, part_len); if ((mmc_block_write(aligned_start, mmc_buf, mmc_block_size)) < 0) { return -1; } dst += part_len; src += part_len; } debug ("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n", src, (ulong) dst, end, part_start, part_end, aligned_start, aligned_end); for (; dst < aligned_end; src += mmc_block_size, dst += mmc_block_size) { debug ("al src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n", src, (ulong) dst, end, part_start, part_end, aligned_start, aligned_end); if ((mmc_block_write(dst, (uchar *) src, mmc_block_size)) < 0) { return -1; } } debug ("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n", src, (ulong) dst, end, part_start, part_end, aligned_start, aligned_end); if (part_end && dst < end) { debug ("pe src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n", src, (ulong) dst, end, part_start, part_end, aligned_start, aligned_end); if ((mmc_block_read(mmc_buf, aligned_end, mmc_block_size)) < 0) { return -1; } memcpy(mmc_buf, src, part_end); if ((mmc_block_write(aligned_end, mmc_buf, mmc_block_size)) < 0) { return -1; } } return 0; } static ulong /****************************************************/ mmc_bread(int dev_num, ulong blknr, lbaint_t blkcnt, void *dst) /****************************************************/ { int mmc_block_size = MMC_BLOCK_SIZE; ulong src = blknr * mmc_block_size + CONFIG_SYS_MMC_BASE; pxa_mmc_read(src, (uchar *) dst, blkcnt * mmc_block_size); return blkcnt; } #ifdef __GNUC__ #define likely(x) __builtin_expect(!!(x), 1) #define unlikely(x) __builtin_expect(!!(x), 0) #else #define likely(x) (x) #define unlikely(x) (x) #endif #define UNSTUFF_BITS(resp,start,size) \ ({ \ const int __size = size; \ const uint32_t __mask = (__size < 32 ? 1 << __size : 0) - 1; \ const int32_t __off = 3 - ((start) / 32); \ const int32_t __shft = (start) & 31; \ uint32_t __res; \ \ __res = resp[__off] >> __shft; \ if (__size + __shft > 32) \ __res |= resp[__off-1] << ((32 - __shft) % 32); \ __res & __mask; \ }) /* * Given the decoded CSD structure, decode the raw CID to our CID structure. */ static void mmc_decode_cid(uint32_t * resp) { if (IF_TYPE_SD == mmc_dev.if_type) { /* * SD doesn't currently have a version field so we will * have to assume we can parse this. */ sprintf((char *)mmc_dev.vendor, "Man %02x OEM %c%c \"%c%c%c%c%c\" Date %02u/%04u", UNSTUFF_BITS(resp, 120, 8), UNSTUFF_BITS(resp, 112, 8), UNSTUFF_BITS(resp, 104, 8), UNSTUFF_BITS(resp, 96, 8), UNSTUFF_BITS(resp, 88, 8), UNSTUFF_BITS(resp, 80, 8), UNSTUFF_BITS(resp, 72, 8), UNSTUFF_BITS(resp, 64, 8), UNSTUFF_BITS(resp, 8, 4), UNSTUFF_BITS(resp, 12, 8) + 2000); sprintf((char *)mmc_dev.revision, "%d.%d", UNSTUFF_BITS(resp, 60, 4), UNSTUFF_BITS(resp, 56, 4)); sprintf((char *)mmc_dev.product, "%u", UNSTUFF_BITS(resp, 24, 32)); } else { /* * The selection of the format here is based upon published * specs from sandisk and from what people have reported. */ switch (spec_ver) { case 0: /* MMC v1.0 - v1.2 */ case 1: /* MMC v1.4 */ sprintf((char *)mmc_dev.vendor, "Man %02x%02x%02x \"%c%c%c%c%c%c%c\" Date %02u/%04u", UNSTUFF_BITS(resp, 120, 8), UNSTUFF_BITS(resp, 112, 8), UNSTUFF_BITS(resp, 104, 8), UNSTUFF_BITS(resp, 96, 8), UNSTUFF_BITS(resp, 88, 8), UNSTUFF_BITS(resp, 80, 8), UNSTUFF_BITS(resp, 72, 8), UNSTUFF_BITS(resp, 64, 8), UNSTUFF_BITS(resp, 56, 8), UNSTUFF_BITS(resp, 48, 8), UNSTUFF_BITS(resp, 12, 4), UNSTUFF_BITS(resp, 8, 4) + 1997); sprintf((char *)mmc_dev.revision, "%d.%d", UNSTUFF_BITS(resp, 44, 4), UNSTUFF_BITS(resp, 40, 4)); sprintf((char *)mmc_dev.product, "%u", UNSTUFF_BITS(resp, 16, 24)); break; case 2: /* MMC v2.0 - v2.2 */ case 3: /* MMC v3.1 - v3.3 */ case 4: /* MMC v4 */ sprintf((char *)mmc_dev.vendor, "Man %02x OEM %04x \"%c%c%c%c%c%c\" Date %02u/%04u", UNSTUFF_BITS(resp, 120, 8), UNSTUFF_BITS(resp, 104, 16), UNSTUFF_BITS(resp, 96, 8), UNSTUFF_BITS(resp, 88, 8), UNSTUFF_BITS(resp, 80, 8), UNSTUFF_BITS(resp, 72, 8), UNSTUFF_BITS(resp, 64, 8), UNSTUFF_BITS(resp, 56, 8), UNSTUFF_BITS(resp, 12, 4), UNSTUFF_BITS(resp, 8, 4) + 1997); sprintf((char *)mmc_dev.product, "%u", UNSTUFF_BITS(resp, 16, 32)); sprintf((char *)mmc_dev.revision, "N/A"); break; default: printf("MMC card has unknown MMCA version %d\n", spec_ver); break; } } printf("%s card.\nVendor: %s\nProduct: %s\nRevision: %s\n", (IF_TYPE_SD == mmc_dev.if_type) ? "SD" : "MMC", mmc_dev.vendor, mmc_dev.product, mmc_dev.revision); } /* * Given a 128-bit response, decode to our card CSD structure. */ static void mmc_decode_csd(uint32_t * resp) { unsigned int mult, csd_struct; if (IF_TYPE_SD == mmc_dev.if_type) { csd_struct = UNSTUFF_BITS(resp, 126, 2); if (csd_struct != 0) { printf("SD: unrecognised CSD structure version %d\n", csd_struct); return; } } else { /* * We only understand CSD structure v1.1 and v1.2. * v1.2 has extra information in bits 15, 11 and 10. */ csd_struct = UNSTUFF_BITS(resp, 126, 2); if (csd_struct != 1 && csd_struct != 2) { printf("MMC: unrecognised CSD structure version %d\n", csd_struct); return; } spec_ver = UNSTUFF_BITS(resp, 122, 4); mmc_dev.if_type = IF_TYPE_MMC; } mult = 1 << (UNSTUFF_BITS(resp, 47, 3) + 2); mmc_dev.lba = (1 + UNSTUFF_BITS(resp, 62, 12)) * mult; mmc_dev.blksz = 1 << UNSTUFF_BITS(resp, 80, 4); /* FIXME: The following just makes assumes that's the partition type -- should really read it */ mmc_dev.part_type = PART_TYPE_DOS; mmc_dev.dev = 0; mmc_dev.lun = 0; mmc_dev.type = DEV_TYPE_HARDDISK; mmc_dev.removable = 0; mmc_dev.block_read = mmc_bread; printf("Detected: %lu blocks of %lu bytes (%luMB) ", mmc_dev.lba, mmc_dev.blksz, mmc_dev.lba * mmc_dev.blksz / (1024 * 1024)); } int /****************************************************/ mmc_legacy_init(int verbose) /****************************************************/ { int retries, rc = -ENODEV; uint32_t cid_resp[4]; uint32_t *resp; uint16_t rca = 0; /* Reset device interface type */ mmc_dev.if_type = IF_TYPE_UNKNOWN; #if defined (CONFIG_LUBBOCK) || (defined (CONFIG_GUMSTIX) && !defined(CONFIG_PXA27X)) set_GPIO_mode(GPIO6_MMCCLK_MD); set_GPIO_mode(GPIO8_MMCCS0_MD); #endif #ifdef CONFIG_CPU_MONAHANS /* pxa3xx */ writel(readl(CKENA) | CKENA_12_MMC0 | CKENA_13_MMC1, CKENA); #else /* pxa2xx */ writel(readl(CKEN) | CKEN12_MMC, CKEN); /* enable MMC unit clock */ #endif writel(MMC_CLKRT_0_3125MHZ, MMC_CLKRT); writel(MMC_RES_TO_MAX, MMC_RESTO); writel(MMC_SPI_DISABLE, MMC_SPI); /* reset */ mmc_cmd(MMC_CMD_GO_IDLE_STATE, 0, 0, MMC_CMDAT_INIT | MMC_CMDAT_R0); udelay(200000); retries = 3; while (retries--) { resp = mmc_cmd(MMC_CMD_APP_CMD, 0, 0, MMC_CMDAT_R1); if (!(resp[0] & 0x00000020)) { /* Card does not support APP_CMD */ debug("Card does not support APP_CMD\n"); break; } /* Select 3.2-3.3V and 3.3-3.4V */ resp = mmc_cmd(SD_CMD_APP_SEND_OP_COND, 0x0030, 0x0000, MMC_CMDAT_R3 | (retries < 2 ? 0 : MMC_CMDAT_INIT)); if (resp[0] & 0x80000000) { mmc_dev.if_type = IF_TYPE_SD; debug("Detected SD card\n"); break; } udelay(200000); } if (retries <= 0 || !(IF_TYPE_SD == mmc_dev.if_type)) { debug("Failed to detect SD Card, trying MMC\n"); resp = mmc_cmd(MMC_CMD_SEND_OP_COND, 0x00ff, 0x8000, MMC_CMDAT_R3); retries = 10; while (retries-- && resp && !(resp[0] & 0x80000000)) { udelay(200000); resp = mmc_cmd(MMC_CMD_SEND_OP_COND, 0x00ff, 0x8000, MMC_CMDAT_R3); } } /* try to get card id */ resp = mmc_cmd(MMC_CMD_ALL_SEND_CID, 0, 0, MMC_CMDAT_R2 | MMC_CMDAT_BUSY); if (resp) { memcpy(cid_resp, resp, sizeof(cid_resp)); /* MMC exists, get CSD too */ resp = mmc_cmd(MMC_CMD_SET_RELATIVE_ADDR, 0, 0, MMC_CMDAT_R1); if (IF_TYPE_SD == mmc_dev.if_type) rca = ((resp[0] & 0xffff0000) >> 16); resp = mmc_cmd(MMC_CMD_SEND_CSD, rca, 0, MMC_CMDAT_R2); if (resp) { mmc_decode_csd(resp); rc = 0; mmc_ready = 1; } mmc_decode_cid(cid_resp); } writel(0, MMC_CLKRT); /* 20 MHz */ resp = mmc_cmd(MMC_CMD_SELECT_CARD, rca, 0, MMC_CMDAT_R1); #if defined(CONFIG_PXA27X) || defined(CONFIG_CPU_MONAHANS) if (IF_TYPE_SD == mmc_dev.if_type) { resp = mmc_cmd(MMC_CMD_APP_CMD, rca, 0, MMC_CMDAT_R1); resp = mmc_cmd(SD_CMD_APP_SET_BUS_WIDTH, 0, 2, MMC_CMDAT_R1); wide = MMC_CMDAT_SD_4DAT; } #endif fat_register_device(&mmc_dev, 1); /* partitions start counting with 1 */ return rc; }