Blackfin: add driver for on-chip MMC/SD controller
This is a port of the Linux Blackfin on-chip SDH driver to U-Boot.
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index bb0d52e..d496364 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -26,6 +26,7 @@
LIB := $(obj)libmmc.a
COBJS-$(CONFIG_ATMEL_MCI) += atmel_mci.o
+COBJS-$(CONFIG_BFIN_SDH) += bfin_sdh.o
COBJS-$(CONFIG_OMAP3_MMC) += omap3_mmc.o
COBJS := $(COBJS-y)
diff --git a/drivers/mmc/bfin_sdh.c b/drivers/mmc/bfin_sdh.c
new file mode 100644
index 0000000..7d6b495
--- /dev/null
+++ b/drivers/mmc/bfin_sdh.c
@@ -0,0 +1,546 @@
+/*
+ * Driver for Blackfin on-chip SDH controller
+ *
+ * Copyright (c) 2008 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <part.h>
+#include <mmc.h>
+
+#include <asm/io.h>
+#include <asm/errno.h>
+#include <asm/byteorder.h>
+#include <asm/blackfin.h>
+#include <asm/mach-common/bits/sdh.h>
+#include <asm/mach-common/bits/dma.h>
+
+#include "bfin_sdh.h"
+
+/* SD_CLK frequency must be less than 400k in identification mode */
+#ifndef CONFIG_SYS_MMC_CLK_ID
+#define CONFIG_SYS_MMC_CLK_ID 200000
+#endif
+/* SD_CLK for normal working */
+#ifndef CONFIG_SYS_MMC_CLK_OP
+#define CONFIG_SYS_MMC_CLK_OP 25000000
+#endif
+/* support 3.2-3.3V and 3.3-3.4V */
+#define CONFIG_SYS_MMC_OP_COND 0x00300000
+#define MMC_DEFAULT_RCA 1
+
+#if defined(__ADSPBF51x__)
+# define bfin_read_SDH_PWR_CTL bfin_read_RSI_PWR_CONTROL
+# define bfin_write_SDH_PWR_CTL bfin_write_RSI_PWR_CONTROL
+# define bfin_read_SDH_CLK_CTL bfin_read_RSI_CLK_CONTROL
+# define bfin_write_SDH_CLK_CTL bfin_write_RSI_CLK_CONTROL
+# define bfin_write_SDH_ARGUMENT bfin_write_RSI_ARGUMENT
+# define bfin_write_SDH_COMMAND bfin_write_RSI_COMMAND
+# define bfin_read_SDH_RESPONSE0 bfin_read_RSI_RESPONSE0
+# define bfin_read_SDH_RESPONSE1 bfin_read_RSI_RESPONSE1
+# define bfin_read_SDH_RESPONSE2 bfin_read_RSI_RESPONSE2
+# define bfin_read_SDH_RESPONSE3 bfin_read_RSI_RESPONSE3
+# define bfin_write_SDH_DATA_TIMER bfin_write_RSI_DATA_TIMER
+# define bfin_write_SDH_DATA_LGTH bfin_write_RSI_DATA_LGTH
+# define bfin_read_SDH_DATA_CTL bfin_read_RSI_DATA_CONTROL
+# define bfin_write_SDH_DATA_CTL bfin_write_RSI_DATA_CONTROL
+# define bfin_read_SDH_STATUS bfin_read_RSI_STATUS
+# define bfin_write_SDH_STATUS_CLR bfin_write_RSI_STATUSCL
+# define bfin_read_SDH_CFG bfin_read_RSI_CONFIG
+# define bfin_write_SDH_CFG bfin_write_RSI_CONFIG
+# define bfin_write_DMA_START_ADDR bfin_write_DMA4_START_ADDR
+# define bfin_write_DMA_X_COUNT bfin_write_DMA4_X_COUNT
+# define bfin_write_DMA_X_MODIFY bfin_write_DMA4_X_MODIFY
+# define bfin_write_DMA_CONFIG bfin_write_DMA4_CONFIG
+#elif defined(__ADSPBF54x__)
+# define bfin_write_DMA_START_ADDR bfin_write_DMA22_START_ADDR
+# define bfin_write_DMA_X_COUNT bfin_write_DMA22_X_COUNT
+# define bfin_write_DMA_X_MODIFY bfin_write_DMA22_X_MODIFY
+# define bfin_write_DMA_CONFIG bfin_write_DMA22_CONFIG
+#else
+# error no support for this proc yet
+#endif
+
+static unsigned int mmc_rca;
+static int mmc_card_is_sd;
+static block_dev_desc_t mmc_blkdev;
+struct mmc_cid cid;
+static __u32 csd[4];
+
+#define get_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; \
+ })
+
+
+block_dev_desc_t *mmc_get_dev(int dev)
+{
+ return &mmc_blkdev;
+}
+
+static void mci_set_clk(unsigned long clk)
+{
+ unsigned long sys_clk;
+ unsigned long clk_div;
+ __u16 clk_ctl = 0;
+
+ /* setting SD_CLK */
+ sys_clk = get_sclk();
+ bfin_write_SDH_CLK_CTL(0);
+ if (sys_clk % (2 * clk) == 0)
+ clk_div = sys_clk / (2 * clk) - 1;
+ else
+ clk_div = sys_clk / (2 * clk);
+
+ if (clk_div > 0xff)
+ clk_div = 0xff;
+ clk_ctl |= (clk_div & 0xff);
+ clk_ctl |= CLK_E;
+ bfin_write_SDH_CLK_CTL(clk_ctl);
+}
+
+static int
+mmc_cmd(unsigned long cmd, unsigned long arg, void *resp, unsigned long flags)
+{
+ unsigned int sdh_cmd;
+ unsigned int status;
+ int ret = 0;
+ sdh_cmd = 0;
+ unsigned long *response = resp;
+ sdh_cmd |= cmd;
+
+ if (flags & MMC_RSP_PRESENT)
+ sdh_cmd |= CMD_RSP;
+
+ if (flags & MMC_RSP_136)
+ sdh_cmd |= CMD_L_RSP;
+
+ bfin_write_SDH_ARGUMENT(arg);
+ bfin_write_SDH_COMMAND(sdh_cmd | CMD_E);
+
+ /* wait for a while */
+ do {
+ udelay(1);
+ status = bfin_read_SDH_STATUS();
+ } while (!(status & (CMD_SENT | CMD_RESP_END | CMD_TIME_OUT |
+ CMD_CRC_FAIL)));
+
+ if (flags & MMC_RSP_PRESENT) {
+ response[0] = bfin_read_SDH_RESPONSE0();
+ if (flags & MMC_RSP_136) {
+ response[1] = bfin_read_SDH_RESPONSE1();
+ response[2] = bfin_read_SDH_RESPONSE2();
+ response[3] = bfin_read_SDH_RESPONSE3();
+ }
+ }
+
+ if (status & CMD_TIME_OUT) {
+ printf("CMD%d timeout\n", (int)cmd);
+ ret |= -ETIMEDOUT;
+ } else if (status & CMD_CRC_FAIL && flags & MMC_RSP_CRC) {
+ printf("CMD%d CRC failure\n", (int)cmd);
+ ret |= -EILSEQ;
+ }
+ bfin_write_SDH_STATUS_CLR(CMD_SENT_STAT | CMD_RESP_END_STAT |
+ CMD_TIMEOUT_STAT | CMD_CRC_FAIL_STAT);
+ return ret;
+}
+
+static int
+mmc_acmd(unsigned long cmd, unsigned long arg, void *resp, unsigned long flags)
+{
+ unsigned long aresp[4];
+ int ret = 0;
+
+ ret = mmc_cmd(MMC_CMD_APP_CMD, 0, aresp,
+ MMC_RSP_PRESENT);
+ if (ret)
+ return ret;
+
+ if ((aresp[0] & (ILLEGAL_COMMAND | APP_CMD)) != APP_CMD)
+ return -ENODEV;
+ ret = mmc_cmd(cmd, arg, resp, flags);
+ return ret;
+}
+
+static unsigned long
+mmc_bread(int dev, unsigned long start, lbaint_t blkcnt, void *buffer)
+{
+ int ret, i;
+ unsigned long resp[4];
+ unsigned long card_status;
+ __u8 *buf = buffer;
+ __u32 status;
+ __u16 data_ctl = 0;
+ __u16 dma_cfg = 0;
+
+ if (blkcnt == 0)
+ return 0;
+ debug("mmc_bread: dev %d, start %d, blkcnt %d\n", dev, start, blkcnt);
+ /* Force to use 512-byte block,because a lot of code depends on this */
+ data_ctl |= 9 << 4;
+ data_ctl |= DTX_DIR;
+ bfin_write_SDH_DATA_CTL(data_ctl);
+ dma_cfg |= WDSIZE_32 | RESTART | WNR | DMAEN;
+
+ /* FIXME later */
+ bfin_write_SDH_DATA_TIMER(0xFFFFFFFF);
+ for (i = 0; i < blkcnt; ++i, ++start) {
+ blackfin_dcache_flush_invalidate_range(buf + i * mmc_blkdev.blksz,
+ buf + (i + 1) * mmc_blkdev.blksz);
+ bfin_write_DMA_START_ADDR(buf + i * mmc_blkdev.blksz);
+ bfin_write_DMA_X_COUNT(mmc_blkdev.blksz / 4);
+ bfin_write_DMA_X_MODIFY(4);
+ bfin_write_DMA_CONFIG(dma_cfg);
+ bfin_write_SDH_DATA_LGTH(mmc_blkdev.blksz);
+ /* Put the device into Transfer state */
+ ret = mmc_cmd(MMC_CMD_SELECT_CARD, mmc_rca << 16, resp, MMC_RSP_R1);
+ if (ret) {
+ printf("MMC_CMD_SELECT_CARD failed\n");
+ goto out;
+ }
+ /* Set block length */
+ ret = mmc_cmd(MMC_CMD_SET_BLOCKLEN, mmc_blkdev.blksz, resp, MMC_RSP_R1);
+ if (ret) {
+ printf("MMC_CMD_SET_BLOCKLEN failed\n");
+ goto out;
+ }
+ ret = mmc_cmd(MMC_CMD_READ_SINGLE_BLOCK,
+ start * mmc_blkdev.blksz, resp,
+ MMC_RSP_R1);
+ if (ret) {
+ printf("MMC_CMD_READ_SINGLE_BLOCK failed\n");
+ goto out;
+ }
+ bfin_write_SDH_DATA_CTL(bfin_read_SDH_DATA_CTL() | DTX_DMA_E | DTX_E);
+
+ do {
+ udelay(1);
+ status = bfin_read_SDH_STATUS();
+ } while (!(status & (DAT_BLK_END | DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | RX_OVERRUN)));
+
+ if (status & (DAT_TIME_OUT | DAT_CRC_FAIL | RX_OVERRUN)) {
+ bfin_write_SDH_STATUS_CLR(DAT_TIMEOUT_STAT | \
+ DAT_CRC_FAIL_STAT | RX_OVERRUN_STAT);
+ goto read_error;
+ } else {
+ bfin_write_SDH_STATUS_CLR(DAT_BLK_END_STAT | DAT_END_STAT);
+ mmc_cmd(MMC_CMD_SELECT_CARD, 0, resp, 0);
+ }
+ }
+ out:
+
+ return i;
+
+ read_error:
+ mmc_cmd(MMC_CMD_SEND_STATUS, mmc_rca << 16, &card_status, MMC_RSP_R1);
+ printf("mmc: bread failed, status = %08x, card status = %08lx\n",
+ status, card_status);
+ goto out;
+}
+
+static unsigned long
+mmc_bwrite(int dev, unsigned long start, lbaint_t blkcnt, const void *buffer)
+{
+ int ret, i = 0;
+ unsigned long resp[4];
+ unsigned long card_status;
+ const __u8 *buf = buffer;
+ __u32 status;
+ __u16 data_ctl = 0;
+ __u16 dma_cfg = 0;
+
+ if (blkcnt == 0)
+ return 0;
+
+ debug("mmc_bwrite: dev %d, start %lx, blkcnt %lx\n",
+ dev, start, blkcnt);
+ /* Force to use 512-byte block,because a lot of code depends on this */
+ data_ctl |= 9 << 4;
+ data_ctl &= ~DTX_DIR;
+ bfin_write_SDH_DATA_CTL(data_ctl);
+ dma_cfg |= WDSIZE_32 | RESTART | DMAEN;
+ /* FIXME later */
+ bfin_write_SDH_DATA_TIMER(0xFFFFFFFF);
+ for (i = 0; i < blkcnt; ++i, ++start) {
+ bfin_write_DMA_START_ADDR(buf + i * mmc_blkdev.blksz);
+ bfin_write_DMA_X_COUNT(mmc_blkdev.blksz / 4);
+ bfin_write_DMA_X_MODIFY(4);
+ bfin_write_DMA_CONFIG(dma_cfg);
+ bfin_write_SDH_DATA_LGTH(mmc_blkdev.blksz);
+
+ /* Put the device into Transfer state */
+ ret = mmc_cmd(MMC_CMD_SELECT_CARD, mmc_rca << 16, resp, MMC_RSP_R1);
+ if (ret) {
+ printf("MMC_CMD_SELECT_CARD failed\n");
+ goto out;
+ }
+ /* Set block length */
+ ret = mmc_cmd(MMC_CMD_SET_BLOCKLEN, mmc_blkdev.blksz, resp, MMC_RSP_R1);
+ if (ret) {
+ printf("MMC_CMD_SET_BLOCKLEN failed\n");
+ goto out;
+ }
+ ret = mmc_cmd(MMC_CMD_WRITE_BLOCK,
+ start * mmc_blkdev.blksz, resp,
+ MMC_RSP_R1);
+ if (ret) {
+ printf("MMC_CMD_WRITE_SINGLE_BLOCK failed\n");
+ goto out;
+ }
+ bfin_write_SDH_DATA_CTL(bfin_read_SDH_DATA_CTL() | DTX_DMA_E | DTX_E);
+
+ do {
+ udelay(1);
+ status = bfin_read_SDH_STATUS();
+ } while (!(status & (DAT_BLK_END | DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | TX_UNDERRUN)));
+
+ if (status & (DAT_TIME_OUT | DAT_CRC_FAIL | TX_UNDERRUN)) {
+ bfin_write_SDH_STATUS_CLR(DAT_TIMEOUT_STAT |
+ DAT_CRC_FAIL_STAT | TX_UNDERRUN_STAT);
+ goto write_error;
+ } else {
+ bfin_write_SDH_STATUS_CLR(DAT_BLK_END_STAT | DAT_END_STAT);
+ mmc_cmd(MMC_CMD_SELECT_CARD, 0, resp, 0);
+ }
+ }
+ out:
+ return i;
+
+ write_error:
+ mmc_cmd(MMC_CMD_SEND_STATUS, mmc_rca << 16, &card_status, MMC_RSP_R1);
+ printf("mmc: bwrite failed, status = %08x, card status = %08lx\n",
+ status, card_status);
+ goto out;
+}
+
+static void mmc_parse_cid(struct mmc_cid *cid, unsigned long *resp)
+{
+ cid->mid = resp[0] >> 24;
+ cid->oid = (resp[0] >> 8) & 0xffff;
+ cid->pnm[0] = resp[0];
+ cid->pnm[1] = resp[1] >> 24;
+ cid->pnm[2] = resp[1] >> 16;
+ cid->pnm[3] = resp[1] >> 8;
+ cid->pnm[4] = resp[1];
+ cid->pnm[5] = resp[2] >> 24;
+ cid->pnm[6] = 0;
+ cid->prv = resp[2] >> 16;
+ cid->psn = (resp[2] << 16) | (resp[3] >> 16);
+ cid->mdt = resp[3] >> 8;
+}
+
+static void sd_parse_cid(struct mmc_cid *cid, unsigned long *resp)
+{
+ cid->mid = resp[0] >> 24;
+ cid->oid = (resp[0] >> 8) & 0xffff;
+ cid->pnm[0] = resp[0];
+ cid->pnm[1] = resp[1] >> 24;
+ cid->pnm[2] = resp[1] >> 16;
+ cid->pnm[3] = resp[1] >> 8;
+ cid->pnm[4] = resp[1];
+ cid->pnm[5] = 0;
+ cid->pnm[6] = 0;
+ cid->prv = resp[2] >> 24;
+ cid->psn = (resp[2] << 8) | (resp[3] >> 24);
+ cid->mdt = (resp[3] >> 8) & 0x0fff;
+}
+
+static void mmc_dump_cid(const struct mmc_cid *cid)
+{
+ printf("CID information:\n");
+ printf("Manufacturer ID: %02X\n", cid->mid);
+ printf("OEM/Application ID: %04X\n", cid->oid);
+ printf("Product name: %s\n", cid->pnm);
+ printf("Product Revision: %u.%u\n",
+ cid->prv >> 4, cid->prv & 0x0f);
+ printf("Product Serial Number: %lu\n", cid->psn);
+ printf("Manufacturing Date: %02u/%02u\n",
+ cid->mdt >> 4, cid->mdt & 0x0f);
+}
+
+static void mmc_dump_csd(__u32 *csd)
+{
+ printf("CSD information:\n");
+ printf("CSD structure version: 1.%u\n", get_bits(csd, 126, 2));
+ printf("Card command classes: %03x\n", get_bits(csd, 84, 12));
+ printf("Max trans speed: %s\n", (get_bits(csd, 96, 8) == 0x32) ? "25MHz" : "50MHz");
+ printf("Read block length: %d\n", 1 << get_bits(csd, 80, 4));
+ printf("Write block length: %u\n", 1 << get_bits(csd, 22, 4));
+ printf("Card capacity: %u bytes\n",
+ (get_bits(csd, 62, 12) + 1) * (1 << (get_bits(csd, 47, 3) + 2)) *
+ (1 << get_bits(csd, 80, 4)));
+ putc('\n');
+}
+
+static int mmc_idle_cards(void)
+{
+ int ret = 0;
+
+ /* Reset all cards */
+ ret = mmc_cmd(MMC_CMD_GO_IDLE_STATE, 0, NULL, 0);
+ if (ret)
+ return ret;
+ udelay(500);
+ return mmc_cmd(MMC_CMD_GO_IDLE_STATE, 0, NULL, 0);
+}
+
+static int sd_init_card(struct mmc_cid *cid, int verbose)
+{
+ unsigned long resp[4];
+ int i, ret = 0;
+
+ mmc_idle_cards();
+ for (i = 0; i < 1000; ++i) {
+ ret = mmc_acmd(SD_CMD_APP_SEND_OP_COND, CONFIG_SYS_MMC_OP_COND,
+ resp, MMC_RSP_R3);
+ if (ret || (resp[0] & 0x80000000))
+ break;
+ ret = -ETIMEDOUT;
+ }
+ if (ret)
+ return ret;
+
+ ret = mmc_cmd(MMC_CMD_ALL_SEND_CID, 0, resp, MMC_RSP_R2);
+ if (ret)
+ return ret;
+ sd_parse_cid(cid, resp);
+ if (verbose)
+ mmc_dump_cid(cid);
+
+ /* Get RCA of the card that responded */
+ ret = mmc_cmd(SD_CMD_SEND_RELATIVE_ADDR, 0, resp, MMC_RSP_R6);
+ if (ret)
+ return ret;
+
+ mmc_rca = (resp[0] >> 16) & 0xffff;
+ if (verbose)
+ printf("SD Card detected (RCA %u)\n", mmc_rca);
+ mmc_card_is_sd = 1;
+ return 0;
+}
+
+static int mmc_init_card(struct mmc_cid *cid, int verbose)
+{
+ unsigned long resp[4];
+ int i, ret = 0;
+
+ mmc_idle_cards();
+ for (i = 0; i < 1000; ++i) {
+ ret = mmc_cmd(MMC_CMD_SEND_OP_COND, CONFIG_SYS_MMC_OP_COND, resp,
+ MMC_RSP_R3);
+ if (ret || (resp[0] & 0x80000000))
+ break;
+ ret = -ETIMEDOUT;
+ }
+ if (ret)
+ return ret;
+
+ /* Get CID of all cards. FIXME: Support more than one card */
+ ret = mmc_cmd(MMC_CMD_ALL_SEND_CID, 0, resp, MMC_RSP_R2);
+ if (ret)
+ return ret;
+ mmc_parse_cid(cid, resp);
+ if (verbose)
+ mmc_dump_cid(cid);
+
+ /* Set Relative Address of the card that responded */
+ ret = mmc_cmd(MMC_CMD_SET_RELATIVE_ADDR, mmc_rca << 16, resp,
+ MMC_RSP_R1);
+ return ret;
+}
+
+int mmc_init(int verbose)
+{
+ __u16 pwr_ctl = 0;
+ int ret;
+ unsigned int max_blksz;
+ /* Initialize sdh controller */
+#if defined(__ADSPBF54x__)
+ bfin_write_DMAC1_PERIMUX(bfin_read_DMAC1_PERIMUX() | 0x1);
+ bfin_write_PORTC_FER(bfin_read_PORTC_FER() | 0x3F00);
+ bfin_write_PORTC_MUX(bfin_read_PORTC_MUX() & ~0xFFF0000);
+#elif defined(__ADSPBF51x__)
+ bfin_write_PORTG_FER(bfin_read_PORTG_FER() | 0x01F8);
+ bfin_write_PORTG_MUX((bfin_read_PORTG_MUX() & ~0x3FC) | 0x154);
+#else
+# error no portmux for this proc yet
+#endif
+ bfin_write_SDH_CFG(bfin_read_SDH_CFG() | CLKS_EN);
+ /* Disable card detect pin */
+ bfin_write_SDH_CFG((bfin_read_SDH_CFG() & 0x1F) | 0x60);
+ mci_set_clk(CONFIG_SYS_MMC_CLK_ID);
+ /* setting power control */
+ pwr_ctl |= ROD_CTL;
+ pwr_ctl |= PWR_ON;
+ bfin_write_SDH_PWR_CTL(pwr_ctl);
+ mmc_card_is_sd = 0;
+ ret = sd_init_card(&cid, verbose);
+ if (ret) {
+ mmc_rca = MMC_DEFAULT_RCA;
+ ret = mmc_init_card(&cid, verbose);
+ }
+ if (ret)
+ return ret;
+ /* Get CSD from the card */
+ ret = mmc_cmd(MMC_CMD_SEND_CSD, mmc_rca << 16, csd, MMC_RSP_R2);
+ if (ret)
+ return ret;
+ if (verbose)
+ mmc_dump_csd(csd);
+ /* Initialize the blockdev structure */
+ mmc_blkdev.if_type = IF_TYPE_MMC;
+ mmc_blkdev.part_type = PART_TYPE_DOS;
+ mmc_blkdev.block_read = mmc_bread;
+ mmc_blkdev.block_write = mmc_bwrite;
+ sprintf(mmc_blkdev.vendor,
+ "Man %02x%04x Snr %08lx",
+ cid.mid, cid.oid, cid.psn);
+ strncpy(mmc_blkdev.product, cid.pnm,
+ sizeof(mmc_blkdev.product));
+ sprintf(mmc_blkdev.revision, "%x %x",
+ cid.prv >> 4, cid.prv & 0x0f);
+
+ max_blksz = 1 << get_bits(csd, 80, 4);
+ /*
+ * If we can't use 512 byte blocks, refuse to deal with the
+ * card. Tons of code elsewhere seems to depend on this.
+ */
+ if (max_blksz < 512 || (max_blksz > 512 && !get_bits(csd, 79, 1))) {
+ printf("Card does not support 512 byte reads, aborting.\n");
+ return -ENODEV;
+ }
+
+ mmc_blkdev.blksz = 512;
+ mmc_blkdev.lba = (get_bits(csd, 62, 12) + 1) * (1 << (get_bits(csd, 47, 3) + 2));
+ mci_set_clk(CONFIG_SYS_MMC_CLK_OP);
+ init_part(&mmc_blkdev);
+ return 0;
+}
+
+int mmc_read(ulong src, uchar *dst, int size)
+{
+ return -ENOSYS;
+}
+
+int mmc_write(uchar *src, ulong dst, int size)
+{
+ return -ENOSYS;
+}
+
+int mmc2info(ulong addr)
+{
+ return 0;
+}
diff --git a/drivers/mmc/bfin_sdh.h b/drivers/mmc/bfin_sdh.h
new file mode 100644
index 0000000..793ec30
--- /dev/null
+++ b/drivers/mmc/bfin_sdh.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2008 Analog Device Inc.
+ *
+ * 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
+ */
+#ifndef __BLACKFIN_SDH_H__
+#define __BLACKFIN_SDH_H__
+
+#define MMC_RSP_PRESENT (1 << 0)
+#define MMC_RSP_136 (1 << 1) /* 136 bit response */
+#define MMC_RSP_CRC (1 << 2) /* expect valid crc */
+#define MMC_RSP_BUSY (1 << 3) /* card may send busy */
+#define MMC_RSP_OPCODE (1 << 4) /* response contains opcode */
+
+#define MMC_CMD_MASK (3 << 5) /* non-SPI command type */
+#define MMC_CMD_AC (0 << 5)
+#define MMC_CMD_ADTC (1 << 5)
+#define MMC_CMD_BC (2 << 5)
+#define MMC_CMD_BCR (3 << 5)
+
+#define MMC_RSP_SPI_S1 (1 << 7) /* one status byte */
+#define MMC_RSP_SPI_S2 (1 << 8) /* second byte */
+#define MMC_RSP_SPI_B4 (1 << 9) /* four data bytes */
+#define MMC_RSP_SPI_BUSY (1 << 10) /* card may send busy */
+
+/*
+ * These are the native response types, and correspond to valid bit
+ * patterns of the above flags. One additional valid pattern
+ * is all zeros, which means we don't expect a response.
+ */
+#define MMC_RSP_NONE (0)
+#define MMC_RSP_R1 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
+#define MMC_RSP_R1B (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY)
+#define MMC_RSP_R2 (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC)
+#define MMC_RSP_R3 (MMC_RSP_PRESENT)
+#define MMC_RSP_R4 (MMC_RSP_PRESENT)
+#define MMC_RSP_R5 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
+#define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
+#define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
+#define ILLEGAL_COMMAND (1 << 22)
+#define APP_CMD (1 << 5)
+
+#endif