Patchwork [U-Boot,V2,1/2] MMC: add sdhci generic framework

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Submitter Lei Wen
Date June 29, 2011, 7:50 a.m.
Message ID <1309333807-839-2-git-send-email-leiwen@marvell.com>
Download mbox | patch
Permalink /patch/102529/
State Accepted, archived
Delegated to: Andy Fleming
Headers show

Comments

Lei Wen - June 29, 2011, 7:50 a.m.
Nowdays, there are plenty of mmc driver in uboot adopt the sd standard
host design, aka as sdhci. It is better to centralize the common logic
together to better maintenance.

Signed-off-by: Lei Wen <leiwen@marvell.com>
---
V1:
add sdhci generic framework

V2:
No Change

 drivers/mmc/Makefile |    1 +
 drivers/mmc/sdhci.c  |  433 ++++++++++++++++++++++++++++++++++++++++++++++++++
 include/sdhci.h      |  325 +++++++++++++++++++++++++++++++++++++
 3 files changed, 759 insertions(+), 0 deletions(-)
 create mode 100644 drivers/mmc/sdhci.c
 create mode 100644 include/sdhci.h

Patch

diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index a8fe17a..50b5117 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -38,6 +38,7 @@  COBJS-$(CONFIG_OMAP3_MMC) += omap3_mmc.o
 COBJS-$(CONFIG_OMAP_HSMMC) += omap_hsmmc.o
 COBJS-$(CONFIG_PXA_MMC) += pxa_mmc.o
 COBJS-$(CONFIG_S5P_MMC) += s5p_mmc.o
+COBJS-$(CONFIG_SDHCI) += sdhci.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
new file mode 100644
index 0000000..9ebd33d
--- /dev/null
+++ b/drivers/mmc/sdhci.c
@@ -0,0 +1,433 @@ 
+/*
+ * Copyright 2011, Marvell Semiconductor Inc.
+ * Lei Wen <leiwen@marvell.com>
+ *
+ * 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
+ *
+ * Back ported to the 8xx platform (from the 8260 platform) by
+ * Murray.Jensen@cmst.csiro.au, 27-Jan-01.
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <mmc.h>
+#include <sdhci.h>
+
+void *aligned_buffer;
+
+static void sdhci_reset(struct sdhci_host *host, u8 mask)
+{
+	unsigned long timeout;
+
+	/* Wait max 100 ms */
+	timeout = 100;
+	sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
+	while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) {
+		if (timeout == 0) {
+			printf("Reset 0x%x never completed.\n", (int)mask);
+			return;
+		}
+		timeout--;
+		udelay(1000);
+	}
+}
+
+static void sdhci_cmd_done(struct sdhci_host *host, struct mmc_cmd *cmd)
+{
+	int i;
+	if (cmd->resp_type & MMC_RSP_136) {
+		/* CRC is stripped so we need to do some shifting. */
+		for (i = 0; i < 4; i++) {
+			cmd->response[i] = sdhci_readl(host,
+					SDHCI_RESPONSE + (3-i)*4) << 8;
+			if (i != 3)
+				cmd->response[i] |= sdhci_readb(host,
+						SDHCI_RESPONSE + (3-i)*4-1);
+		}
+	} else {
+		cmd->response[0] = sdhci_readl(host, SDHCI_RESPONSE);
+	}
+}
+
+static void sdhci_transfer_pio(struct sdhci_host *host, struct mmc_data *data)
+{
+	int i;
+	char *offs;
+	for (i = 0; i < data->blocksize; i += 4) {
+		offs = data->dest + i;
+		if (data->flags == MMC_DATA_READ)
+			*(u32 *)offs = sdhci_readl(host, SDHCI_BUFFER);
+		else
+			sdhci_writel(host, *(u32 *)offs, SDHCI_BUFFER);
+	}
+}
+
+static int sdhci_transfer_data(struct sdhci_host *host, struct mmc_data *data,
+				unsigned int start_addr)
+{
+	unsigned int stat, rdy, mask, block = 0;
+
+	rdy = SDHCI_INT_SPACE_AVAIL | SDHCI_INT_DATA_AVAIL;
+	mask = SDHCI_DATA_AVAILABLE | SDHCI_SPACE_AVAILABLE;
+	do {
+		stat = sdhci_readl(host, SDHCI_INT_STATUS);
+		if (stat & SDHCI_INT_ERROR) {
+			printf("Error detected in status(0x%X)!\n", stat);
+			return -1;
+		}
+		if (stat & rdy) {
+			if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & mask))
+				continue;
+			sdhci_writel(host, rdy, SDHCI_INT_STATUS);
+			sdhci_transfer_pio(host, data);
+			data->dest += data->blocksize;
+			if (++block >= data->blocks)
+				break;
+		}
+#ifdef CONFIG_MMC_SDMA
+		if (stat & SDHCI_INT_DMA_END) {
+			sdhci_writel(host, SDHCI_INT_DMA_END, SDHCI_INT_STATUS);
+			start_addr &= SDHCI_DEFAULT_BOUNDARY_SIZE - 1;
+			start_addr += SDHCI_DEFAULT_BOUNDARY_SIZE;
+			sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS);
+		}
+#endif
+	} while (!(stat & SDHCI_INT_DATA_END));
+	return 0;
+}
+
+int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
+		       struct mmc_data *data)
+{
+	struct sdhci_host *host = (struct sdhci_host *)mmc->priv;
+	unsigned int stat = 0;
+	int ret = 0;
+	int trans_bytes = 0, is_aligned = 1;
+	u32 mask, flags, mode;
+	unsigned int timeout, start_addr = 0;
+
+	/* Wait max 10 ms */
+	timeout = 10;
+
+	sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_STATUS);
+	mask = SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT;
+
+	/* We shouldn't wait for data inihibit for stop commands, even
+	   though they might use busy signaling */
+	if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
+		mask &= ~SDHCI_DATA_INHIBIT;
+
+	while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
+		if (timeout == 0) {
+			printf("Controller never released inhibit bit(s).\n");
+			return COMM_ERR;
+		}
+		timeout--;
+		udelay(1000);
+	}
+
+	mask = SDHCI_INT_RESPONSE;
+	if (!(cmd->resp_type & MMC_RSP_PRESENT))
+		flags = SDHCI_CMD_RESP_NONE;
+	else if (cmd->resp_type & MMC_RSP_136)
+		flags = SDHCI_CMD_RESP_LONG;
+	else if (cmd->resp_type & MMC_RSP_BUSY) {
+		flags = SDHCI_CMD_RESP_SHORT_BUSY;
+		mask |= SDHCI_INT_DATA_END;
+	} else
+		flags = SDHCI_CMD_RESP_SHORT;
+
+	if (cmd->resp_type & MMC_RSP_CRC)
+		flags |= SDHCI_CMD_CRC;
+	if (cmd->resp_type & MMC_RSP_OPCODE)
+		flags |= SDHCI_CMD_INDEX;
+	if (data)
+		flags |= SDHCI_CMD_DATA;
+
+	/*Set Transfer mode regarding to data flag*/
+	if (data != 0) {
+		sdhci_writeb(host, 0xe, SDHCI_TIMEOUT_CONTROL);
+		mode = SDHCI_TRNS_BLK_CNT_EN;
+		trans_bytes = data->blocks * data->blocksize;
+		if (data->blocks > 1)
+			mode |= SDHCI_TRNS_MULTI;
+
+		if (data->flags == MMC_DATA_READ)
+			mode |= SDHCI_TRNS_READ;
+
+#ifdef CONFIG_MMC_SDMA
+		if (data->flags == MMC_DATA_READ)
+			start_addr = (unsigned int)data->dest;
+		else
+			start_addr = (unsigned int)data->src;
+		if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
+				(start_addr & 0x7) != 0x0) {
+			is_aligned = 0;
+			start_addr = (unsigned int)aligned_buffer;
+			if (data->flags != MMC_DATA_READ)
+				memcpy(aligned_buffer, data->src, trans_bytes);
+		}
+
+		sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS);
+		mode |= SDHCI_TRNS_DMA;
+#endif
+		sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG,
+				data->blocksize),
+				SDHCI_BLOCK_SIZE);
+		sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT);
+		sdhci_writew(host, mode, SDHCI_TRANSFER_MODE);
+	}
+
+	sdhci_writel(host, cmd->cmdarg, SDHCI_ARGUMENT);
+#ifdef CONFIG_MMC_SDMA
+	flush_cache(0, ~0);
+#endif
+	sdhci_writew(host, SDHCI_MAKE_CMD(cmd->cmdidx, flags), SDHCI_COMMAND);
+	do {
+		stat = sdhci_readl(host, SDHCI_INT_STATUS);
+		if (stat & SDHCI_INT_ERROR)
+			break;
+	} while ((stat & mask) != mask);
+
+	if ((stat & (SDHCI_INT_ERROR | mask)) == mask) {
+		sdhci_cmd_done(host, cmd);
+		sdhci_writel(host, mask, SDHCI_INT_STATUS);
+	} else
+		ret = -1;
+
+	if (!ret && data)
+		ret = sdhci_transfer_data(host, data, start_addr);
+
+	stat = sdhci_readl(host, SDHCI_INT_STATUS);
+	sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_STATUS);
+	if (!ret) {
+		if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
+				!is_aligned && (data->flags == MMC_DATA_READ))
+			memcpy(data->dest, aligned_buffer, trans_bytes);
+		return 0;
+	}
+
+	sdhci_reset(host, SDHCI_RESET_CMD);
+	sdhci_reset(host, SDHCI_RESET_DATA);
+	if (stat & SDHCI_INT_TIMEOUT)
+		return TIMEOUT;
+	else
+		return COMM_ERR;
+}
+
+static int sdhci_set_clock(struct mmc *mmc, unsigned int clock)
+{
+	struct sdhci_host *host = (struct sdhci_host *)mmc->priv;
+	unsigned int div, clk, timeout;
+
+	sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
+
+	if (clock == 0)
+		return 0;
+
+	if (host->version >= SDHCI_SPEC_300) {
+		/* Version 3.00 divisors must be a multiple of 2. */
+		if (mmc->f_max <= clock)
+			div = 1;
+		else {
+			for (div = 2; div < SDHCI_MAX_DIV_SPEC_300; div += 2) {
+				if ((mmc->f_max / div) <= clock)
+					break;
+			}
+		}
+	} else {
+		/* Version 2.00 divisors must be a power of 2. */
+		for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) {
+			if ((mmc->f_max / div) <= clock)
+				break;
+		}
+	}
+	div >>= 1;
+
+	clk = (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
+	clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
+		<< SDHCI_DIVIDER_HI_SHIFT;
+	clk |= SDHCI_CLOCK_INT_EN;
+	sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+
+	/* Wait max 20 ms */
+	timeout = 20;
+	while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
+		& SDHCI_CLOCK_INT_STABLE)) {
+		if (timeout == 0) {
+			printf("Internal clock never stabilised.\n");
+			return -1;
+		}
+		timeout--;
+		udelay(1000);
+	}
+
+	clk |= SDHCI_CLOCK_CARD_EN;
+	sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+	return 0;
+}
+
+static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
+{
+	u8 pwr = 0;
+
+	if (power != (unsigned short)-1) {
+		switch (1 << power) {
+		case MMC_VDD_165_195:
+			pwr = SDHCI_POWER_180;
+			break;
+		case MMC_VDD_29_30:
+		case MMC_VDD_30_31:
+			pwr = SDHCI_POWER_300;
+			break;
+		case MMC_VDD_32_33:
+		case MMC_VDD_33_34:
+			pwr = SDHCI_POWER_330;
+			break;
+		}
+	}
+
+	if (pwr == 0) {
+		sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
+		return;
+	}
+
+	pwr |= SDHCI_POWER_ON;
+
+	sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
+}
+
+void sdhci_set_ios(struct mmc *mmc)
+{
+	u32 ctrl;
+	struct sdhci_host *host = (struct sdhci_host *)mmc->priv;
+
+	if (mmc->clock != host->clock)
+		sdhci_set_clock(mmc, mmc->clock);
+
+	/* Set bus width */
+	ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
+	if (mmc->bus_width == 8) {
+		ctrl &= ~SDHCI_CTRL_4BITBUS;
+		if (host->version >= SDHCI_SPEC_300)
+			ctrl |= SDHCI_CTRL_8BITBUS;
+	} else {
+		if (host->version >= SDHCI_SPEC_300)
+			ctrl &= ~SDHCI_CTRL_8BITBUS;
+		if (mmc->bus_width == 4)
+			ctrl |= SDHCI_CTRL_4BITBUS;
+		else
+			ctrl &= ~SDHCI_CTRL_4BITBUS;
+	}
+
+	if (mmc->clock > 26000000)
+		ctrl |= SDHCI_CTRL_HISPD;
+	else
+		ctrl &= ~SDHCI_CTRL_HISPD;
+
+	sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
+}
+
+int sdhci_init(struct mmc *mmc)
+{
+	struct sdhci_host *host = (struct sdhci_host *)mmc->priv;
+
+	if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) && !aligned_buffer) {
+		aligned_buffer = memalign(8, 512*1024);
+		if (!aligned_buffer) {
+			printf("Aligned buffer alloc failed!!!");
+			return -1;
+		}
+	}
+
+	/* Eable all state */
+	sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_ENABLE);
+	sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_SIGNAL_ENABLE);
+
+	sdhci_set_power(host, fls(mmc->voltages) - 1);
+
+	return 0;
+}
+
+int add_sdhci(struct sdhci_host *host, u32 max_clk, u32 min_clk)
+{
+	struct mmc *mmc;
+	unsigned int caps;
+
+	mmc = malloc(sizeof(struct mmc));
+	if (!mmc) {
+		printf("mmc malloc fail!\n");
+		return -1;
+	}
+
+	mmc->priv = host;
+
+	sprintf(mmc->name, "%s", host->name);
+	mmc->send_cmd = sdhci_send_command;
+	mmc->set_ios = sdhci_set_ios;
+	mmc->init = sdhci_init;
+
+	caps = sdhci_readl(host, SDHCI_CAPABILITIES);
+#ifdef CONFIG_MMC_SDMA
+	if (!(caps & SDHCI_CAN_DO_SDMA)) {
+		printf("Your controller don't support sdma!!\n");
+		return -1;
+	}
+#endif
+
+	if (max_clk)
+		mmc->f_max = max_clk;
+	else {
+		if (host->version >= SDHCI_SPEC_300)
+			mmc->f_max = (caps & SDHCI_CLOCK_V3_BASE_MASK)
+				>> SDHCI_CLOCK_BASE_SHIFT;
+		else
+			mmc->f_max = (caps & SDHCI_CLOCK_BASE_MASK)
+				>> SDHCI_CLOCK_BASE_SHIFT;
+		mmc->f_max *= 1000000;
+	}
+	if (mmc->f_max == 0) {
+		printf("Hardware doesn't specify base clock frequency\n");
+		return -1;
+	}
+	if (min_clk)
+		mmc->f_min = min_clk;
+	else {
+		if (host->version >= SDHCI_SPEC_300)
+			mmc->f_min = mmc->f_max / SDHCI_MAX_DIV_SPEC_300;
+		else
+			mmc->f_min = mmc->f_max / SDHCI_MAX_DIV_SPEC_200;
+	}
+
+	mmc->voltages = 0;
+	if (caps & SDHCI_CAN_VDD_330)
+		mmc->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34;
+	if (caps & SDHCI_CAN_VDD_300)
+		mmc->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31;
+	if (caps & SDHCI_CAN_VDD_180)
+		mmc->voltages |= MMC_VDD_165_195;
+	mmc->host_caps = MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_4BIT;
+	if (caps & SDHCI_CAN_DO_8BIT)
+		mmc->host_caps |= MMC_MODE_8BIT;
+
+	sdhci_reset(host, SDHCI_RESET_ALL);
+	mmc_register(mmc);
+
+	return 0;
+}
diff --git a/include/sdhci.h b/include/sdhci.h
new file mode 100644
index 0000000..6d52ce9
--- /dev/null
+++ b/include/sdhci.h
@@ -0,0 +1,325 @@ 
+/*
+ * Copyright 2011, Marvell Semiconductor Inc.
+ * Lei Wen <leiwen@marvell.com>
+ *
+ * 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
+ *
+ * Back ported to the 8xx platform (from the 8260 platform) by
+ * Murray.Jensen@cmst.csiro.au, 27-Jan-01.
+ */
+#ifndef __SDHCI_HW_H
+#define __SDHCI_HW_H
+
+#include <asm/io.h>
+/*
+ * Controller registers
+ */
+
+#define SDHCI_DMA_ADDRESS	0x00
+
+#define SDHCI_BLOCK_SIZE	0x04
+#define  SDHCI_MAKE_BLKSZ(dma, blksz) (((dma & 0x7) << 12) | (blksz & 0xFFF))
+
+#define SDHCI_BLOCK_COUNT	0x06
+
+#define SDHCI_ARGUMENT		0x08
+
+#define SDHCI_TRANSFER_MODE	0x0C
+#define  SDHCI_TRNS_DMA		0x01
+#define  SDHCI_TRNS_BLK_CNT_EN	0x02
+#define  SDHCI_TRNS_ACMD12	0x04
+#define  SDHCI_TRNS_READ	0x10
+#define  SDHCI_TRNS_MULTI	0x20
+
+#define SDHCI_COMMAND		0x0E
+#define  SDHCI_CMD_RESP_MASK	0x03
+#define  SDHCI_CMD_CRC		0x08
+#define  SDHCI_CMD_INDEX	0x10
+#define  SDHCI_CMD_DATA		0x20
+#define  SDHCI_CMD_ABORTCMD	0xC0
+
+#define  SDHCI_CMD_RESP_NONE	0x00
+#define  SDHCI_CMD_RESP_LONG	0x01
+#define  SDHCI_CMD_RESP_SHORT	0x02
+#define  SDHCI_CMD_RESP_SHORT_BUSY 0x03
+
+#define SDHCI_MAKE_CMD(c, f) (((c & 0xff) << 8) | (f & 0xff))
+#define SDHCI_GET_CMD(c) ((c>>8) & 0x3f)
+
+#define SDHCI_RESPONSE		0x10
+
+#define SDHCI_BUFFER		0x20
+
+#define SDHCI_PRESENT_STATE	0x24
+#define  SDHCI_CMD_INHIBIT	0x00000001
+#define  SDHCI_DATA_INHIBIT	0x00000002
+#define  SDHCI_DOING_WRITE	0x00000100
+#define  SDHCI_DOING_READ	0x00000200
+#define  SDHCI_SPACE_AVAILABLE	0x00000400
+#define  SDHCI_DATA_AVAILABLE	0x00000800
+#define  SDHCI_CARD_PRESENT	0x00010000
+#define  SDHCI_WRITE_PROTECT	0x00080000
+
+#define SDHCI_HOST_CONTROL	0x28
+#define  SDHCI_CTRL_LED		0x01
+#define  SDHCI_CTRL_4BITBUS	0x02
+#define  SDHCI_CTRL_HISPD	0x04
+#define  SDHCI_CTRL_DMA_MASK	0x18
+#define   SDHCI_CTRL_SDMA	0x00
+#define   SDHCI_CTRL_ADMA1	0x08
+#define   SDHCI_CTRL_ADMA32	0x10
+#define   SDHCI_CTRL_ADMA64	0x18
+#define   SDHCI_CTRL_8BITBUS	0x20
+
+#define SDHCI_POWER_CONTROL	0x29
+#define  SDHCI_POWER_ON		0x01
+#define  SDHCI_POWER_180	0x0A
+#define  SDHCI_POWER_300	0x0C
+#define  SDHCI_POWER_330	0x0E
+
+#define SDHCI_BLOCK_GAP_CONTROL	0x2A
+
+#define SDHCI_WAKE_UP_CONTROL	0x2B
+#define  SDHCI_WAKE_ON_INT	0x01
+#define  SDHCI_WAKE_ON_INSERT	0x02
+#define  SDHCI_WAKE_ON_REMOVE	0x04
+
+#define SDHCI_CLOCK_CONTROL	0x2C
+#define  SDHCI_DIVIDER_SHIFT	8
+#define  SDHCI_DIVIDER_HI_SHIFT	6
+#define  SDHCI_DIV_MASK	0xFF
+#define  SDHCI_DIV_MASK_LEN	8
+#define  SDHCI_DIV_HI_MASK	0x300
+#define  SDHCI_CLOCK_CARD_EN	0x0004
+#define  SDHCI_CLOCK_INT_STABLE	0x0002
+#define  SDHCI_CLOCK_INT_EN	0x0001
+
+#define SDHCI_TIMEOUT_CONTROL	0x2E
+
+#define SDHCI_SOFTWARE_RESET	0x2F
+#define  SDHCI_RESET_ALL	0x01
+#define  SDHCI_RESET_CMD	0x02
+#define  SDHCI_RESET_DATA	0x04
+
+#define SDHCI_INT_STATUS	0x30
+#define SDHCI_INT_ENABLE	0x34
+#define SDHCI_SIGNAL_ENABLE	0x38
+#define  SDHCI_INT_RESPONSE	0x00000001
+#define  SDHCI_INT_DATA_END	0x00000002
+#define  SDHCI_INT_DMA_END	0x00000008
+#define  SDHCI_INT_SPACE_AVAIL	0x00000010
+#define  SDHCI_INT_DATA_AVAIL	0x00000020
+#define  SDHCI_INT_CARD_INSERT	0x00000040
+#define  SDHCI_INT_CARD_REMOVE	0x00000080
+#define  SDHCI_INT_CARD_INT	0x00000100
+#define  SDHCI_INT_ERROR	0x00008000
+#define  SDHCI_INT_TIMEOUT	0x00010000
+#define  SDHCI_INT_CRC		0x00020000
+#define  SDHCI_INT_END_BIT	0x00040000
+#define  SDHCI_INT_INDEX	0x00080000
+#define  SDHCI_INT_DATA_TIMEOUT	0x00100000
+#define  SDHCI_INT_DATA_CRC	0x00200000
+#define  SDHCI_INT_DATA_END_BIT	0x00400000
+#define  SDHCI_INT_BUS_POWER	0x00800000
+#define  SDHCI_INT_ACMD12ERR	0x01000000
+#define  SDHCI_INT_ADMA_ERROR	0x02000000
+
+#define  SDHCI_INT_NORMAL_MASK	0x00007FFF
+#define  SDHCI_INT_ERROR_MASK	0xFFFF8000
+
+#define  SDHCI_INT_CMD_MASK	(SDHCI_INT_RESPONSE | SDHCI_INT_TIMEOUT | \
+		SDHCI_INT_CRC | SDHCI_INT_END_BIT | SDHCI_INT_INDEX)
+#define  SDHCI_INT_DATA_MASK	(SDHCI_INT_DATA_END | SDHCI_INT_DMA_END | \
+		SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL | \
+		SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_DATA_CRC | \
+		SDHCI_INT_DATA_END_BIT | SDHCI_INT_ADMA_ERROR)
+#define SDHCI_INT_ALL_MASK	((unsigned int)-1)
+
+#define SDHCI_ACMD12_ERR	0x3C
+
+/* 3E-3F reserved */
+
+#define SDHCI_CAPABILITIES	0x40
+#define  SDHCI_TIMEOUT_CLK_MASK	0x0000003F
+#define  SDHCI_TIMEOUT_CLK_SHIFT 0
+#define  SDHCI_TIMEOUT_CLK_UNIT	0x00000080
+#define  SDHCI_CLOCK_BASE_MASK	0x00003F00
+#define  SDHCI_CLOCK_V3_BASE_MASK	0x0000FF00
+#define  SDHCI_CLOCK_BASE_SHIFT	8
+#define  SDHCI_MAX_BLOCK_MASK	0x00030000
+#define  SDHCI_MAX_BLOCK_SHIFT  16
+#define  SDHCI_CAN_DO_8BIT	0x00040000
+#define  SDHCI_CAN_DO_ADMA2	0x00080000
+#define  SDHCI_CAN_DO_ADMA1	0x00100000
+#define  SDHCI_CAN_DO_HISPD	0x00200000
+#define  SDHCI_CAN_DO_SDMA	0x00400000
+#define  SDHCI_CAN_VDD_330	0x01000000
+#define  SDHCI_CAN_VDD_300	0x02000000
+#define  SDHCI_CAN_VDD_180	0x04000000
+#define  SDHCI_CAN_64BIT	0x10000000
+
+#define SDHCI_CAPABILITIES_1	0x44
+
+#define SDHCI_MAX_CURRENT	0x48
+
+/* 4C-4F reserved for more max current */
+
+#define SDHCI_SET_ACMD12_ERROR	0x50
+#define SDHCI_SET_INT_ERROR	0x52
+
+#define SDHCI_ADMA_ERROR	0x54
+
+/* 55-57 reserved */
+
+#define SDHCI_ADMA_ADDRESS	0x58
+
+/* 60-FB reserved */
+
+#define SDHCI_SLOT_INT_STATUS	0xFC
+
+#define SDHCI_HOST_VERSION	0xFE
+#define  SDHCI_VENDOR_VER_MASK	0xFF00
+#define  SDHCI_VENDOR_VER_SHIFT	8
+#define  SDHCI_SPEC_VER_MASK	0x00FF
+#define  SDHCI_SPEC_VER_SHIFT	0
+#define   SDHCI_SPEC_100	0
+#define   SDHCI_SPEC_200	1
+#define   SDHCI_SPEC_300	2
+
+/*
+ * End of controller registers.
+ */
+
+#define SDHCI_MAX_DIV_SPEC_200	256
+#define SDHCI_MAX_DIV_SPEC_300	2046
+
+/*
+ * quirks
+ */
+#define SDHCI_QUIRK_32BIT_DMA_ADDR	(1 << 0)
+
+/*
+ * Host SDMA buffer boundary. Valid values from 4K to 512K in powers of 2.
+ */
+#define SDHCI_DEFAULT_BOUNDARY_SIZE	(512 * 1024)
+#define SDHCI_DEFAULT_BOUNDARY_ARG	(7)
+struct sdhci_ops {
+#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
+	u32             (*read_l)(struct sdhci_host *host, int reg);
+	u16             (*read_w)(struct sdhci_host *host, int reg);
+	u8              (*read_b)(struct sdhci_host *host, int reg);
+	void            (*write_l)(struct sdhci_host *host, u32 val, int reg);
+	void            (*write_w)(struct sdhci_host *host, u16 val, int reg);
+	void            (*write_b)(struct sdhci_host *host, u8 val, int reg);
+#endif
+};
+
+struct sdhci_host {
+	char *name;
+	void *ioaddr;
+	unsigned int quirks;
+	unsigned int version;
+	unsigned int clock;
+	const struct sdhci_ops *ops;
+};
+
+#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
+
+static inline void sdhci_writel(struct sdhci_host *host, u32 val, int reg)
+{
+	if (unlikely(host->ops->write_l))
+		host->ops->write_l(host, val, reg);
+	else
+		writel(val, host->ioaddr + reg);
+}
+
+static inline void sdhci_writew(struct sdhci_host *host, u16 val, int reg)
+{
+	if (unlikely(host->ops->write_w))
+		host->ops->write_w(host, val, reg);
+	else
+		writew(val, host->ioaddr + reg);
+}
+
+static inline void sdhci_writeb(struct sdhci_host *host, u8 val, int reg)
+{
+	if (unlikely(host->ops->write_b))
+		host->ops->write_b(host, val, reg);
+	else
+		writeb(val, host->ioaddr + reg);
+}
+
+static inline u32 sdhci_readl(struct sdhci_host *host, int reg)
+{
+	if (unlikely(host->ops->read_l))
+		return host->ops->read_l(host, reg);
+	else
+		return readl(host->ioaddr + reg);
+}
+
+static inline u16 sdhci_readw(struct sdhci_host *host, int reg)
+{
+	if (unlikely(host->ops->read_w))
+		return host->ops->read_w(host, reg);
+	else
+		return readw(host->ioaddr + reg);
+}
+
+static inline u8 sdhci_readb(struct sdhci_host *host, int reg)
+{
+	if (unlikely(host->ops->read_b))
+		return host->ops->read_b(host, reg);
+	else
+		return readb(host->ioaddr + reg);
+}
+
+#else
+
+static inline void sdhci_writel(struct sdhci_host *host, u32 val, int reg)
+{
+	writel(val, host->ioaddr + reg);
+}
+
+static inline void sdhci_writew(struct sdhci_host *host, u16 val, int reg)
+{
+	writew(val, host->ioaddr + reg);
+}
+
+static inline void sdhci_writeb(struct sdhci_host *host, u8 val, int reg)
+{
+	writeb(val, host->ioaddr + reg);
+}
+static inline u32 sdhci_readl(struct sdhci_host *host, int reg)
+{
+	return readl(host->ioaddr + reg);
+}
+
+static inline u16 sdhci_readw(struct sdhci_host *host, int reg)
+{
+	return readw(host->ioaddr + reg);
+}
+
+static inline u8 sdhci_readb(struct sdhci_host *host, int reg)
+{
+	return readb(host->ioaddr + reg);
+}
+#endif
+
+int add_sdhci(struct sdhci_host *host, u32 max_clk, u32 min_clk);
+#endif /* __SDHCI_HW_H */