openwrt-xburst/target/linux/s3c24xx/patches-2.6.24/1064-atheros_2_0_hcd.patch.patch

From ba3a75feb93ededf6f5bcc950bb207a4a59e1dc7 Mon Sep 17 00:00:00 2001
From: mokopatches <mokopatches@openmoko.org>
Date: Sun, 13 Apr 2008 07:23:55 +0100
Subject: [PATCH] atheros_2_0_hcd.patch

---
 drivers/sdio/hcd/Kconfig               |   14 +
 drivers/sdio/hcd/Makefile              |    1 +
 drivers/sdio/hcd/s3c24xx/Makefile      |    2 +
 drivers/sdio/hcd/s3c24xx/s3c24xx_hcd.c | 1502 ++++++++++++++++++++++++++++++++
 drivers/sdio/hcd/s3c24xx/s3c24xx_hcd.h |   67 ++
 5 files changed, 1586 insertions(+), 0 deletions(-)
 create mode 100644 drivers/sdio/hcd/Kconfig
 create mode 100644 drivers/sdio/hcd/Makefile
 create mode 100644 drivers/sdio/hcd/s3c24xx/Makefile
 create mode 100644 drivers/sdio/hcd/s3c24xx/s3c24xx_hcd.c
 create mode 100644 drivers/sdio/hcd/s3c24xx/s3c24xx_hcd.h

diff --git a/drivers/sdio/hcd/Kconfig b/drivers/sdio/hcd/Kconfig
new file mode 100644
index 0000000..e4d8397
--- /dev/null
+++ b/drivers/sdio/hcd/Kconfig
@@ -0,0 +1,14 @@
+config SDIO_S3C24XX
+	tristate "Samsung s3c24xx host controller"
+	depends on PLAT_S3C24XX && SDIO
+	default m
+	help
+	  good luck.
+
+config SDIO_S3C24XX_DMA
+	bool "Samsung s3c24xx host controller DMA I/O"
+	depends on SDIO_S3C24XX
+	default n
+	help
+	  good luck.
+
diff --git a/drivers/sdio/hcd/Makefile b/drivers/sdio/hcd/Makefile
new file mode 100644
index 0000000..e2401e2
--- /dev/null
+++ b/drivers/sdio/hcd/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_PLAT_S3C24XX)	 	+= s3c24xx/
diff --git a/drivers/sdio/hcd/s3c24xx/Makefile b/drivers/sdio/hcd/s3c24xx/Makefile
new file mode 100644
index 0000000..d2d099c
--- /dev/null
+++ b/drivers/sdio/hcd/s3c24xx/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_PLAT_S3C24XX) += sdio_s3c24xx_hcd.o
+sdio_s3c24xx_hcd-objs := s3c24xx_hcd.o
diff --git a/drivers/sdio/hcd/s3c24xx/s3c24xx_hcd.c b/drivers/sdio/hcd/s3c24xx/s3c24xx_hcd.c
new file mode 100644
index 0000000..3c4758b
--- /dev/null
+++ b/drivers/sdio/hcd/s3c24xx/s3c24xx_hcd.c
@@ -0,0 +1,1502 @@
+/*
+ * s3c24xx_hcd.c - Samsung S3C MCI driver, Atheros SDIO API compatible.
+ *
+ * Copyright (C) 2007 by OpenMoko, Inc.
+ * Written by Samuel Ortiz <sameo@openedhand.com>
+ * All Rights Reserved
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/dma-mapping.h>
+#include <linux/errno.h>
+#include <linux/platform_device.h>
+#include <linux/device.h>
+#include <linux/clk.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/workqueue.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
+
+#include <linux/sdio/ctsystem.h>
+#include <linux/sdio/sdio_busdriver.h>
+#include <linux/sdio/sdio_lib.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/dma.h>
+#include <asm/dma-mapping.h>
+
+#include <asm/arch/regs-sdi.h>
+#include <asm/arch/regs-gpio.h>
+#include <asm/arch/mci.h>
+#include <asm/arch/gta02.h>
+
+#include "s3c24xx_hcd.h"
+
+#define DESCRIPTION "S3c24xx SDIO host controller"
+#define AUTHOR "Samuel Ortiz <sameo@openedhand.com>"
+
+#define RESSIZE(ressource) (((ressource)->end - (ressource)->start)+1)
+
+static struct s3c2410_dma_client s3c24xx_hcd_dma_client = {
+	.name		= "s3c24xx_hcd",
+};
+
+extern struct platform_device s3c_device_sdi;
+
+static void dump_request(struct s3c24xx_hcd_context * context)
+{
+    if (context->hcd.pCurrentRequest != NULL) {
+        DBG_PRINT(SDDBG_ERROR, ("Current Request Command:%d, ARG:0x%8.8X flags: 0x%04x\n",
+				context->hcd.pCurrentRequest->Command, context->hcd.pCurrentRequest->Argument,
+				context->hcd.pCurrentRequest->Flags));
+        if (IS_SDREQ_DATA_TRANS(context->hcd.pCurrentRequest->Flags)) {
+            DBG_PRINT(SDDBG_ERROR, ("Data %s, Blocks: %d, BlockLen:%d Remaining: %d \n",
+                      IS_SDREQ_WRITE_DATA(context->hcd.pCurrentRequest->Flags) ? "WRITE":"READ",
+                      context->hcd.pCurrentRequest->BlockCount,
+                      context->hcd.pCurrentRequest->BlockLen,
+                      context->hcd.pCurrentRequest->DataRemaining));
+        }
+    }
+}
+
+static void s3c24xx_dump_regs(struct s3c24xx_hcd_context * context)
+{
+	u32 con, pre, cmdarg, cmdcon, cmdsta, r0, r1, r2, r3, timer, bsize;
+	u32 datcon, datcnt, datsta, fsta, imask;
+
+	con 	= readl(context->base + S3C2410_SDICON);
+	pre 	= readl(context->base + S3C2410_SDIPRE);
+	cmdarg 	= readl(context->base + S3C2410_SDICMDARG);
+	cmdcon 	= readl(context->base + S3C2410_SDICMDCON);
+	cmdsta 	= readl(context->base + S3C2410_SDICMDSTAT);
+	r0 	= readl(context->base + S3C2410_SDIRSP0);
+	r1 	= readl(context->base + S3C2410_SDIRSP1);
+	r2 	= readl(context->base + S3C2410_SDIRSP2);
+	r3 	= readl(context->base + S3C2410_SDIRSP3);
+	timer 	= readl(context->base + S3C2410_SDITIMER);
+	bsize 	= readl(context->base + S3C2410_SDIBSIZE);
+	datcon 	= readl(context->base + S3C2410_SDIDCON);
+	datcnt 	= readl(context->base + S3C2410_SDIDCNT);
+	datsta 	= readl(context->base + S3C2410_SDIDSTA);
+	fsta 	= readl(context->base + S3C2410_SDIFSTA);
+	imask   = readl(context->base + S3C2440_SDIIMSK);
+
+	printk("SDICON:    0x%08x\n", con);
+	printk("SDIPRE:    0x%08x\n", pre);
+	printk("SDICmdArg: 0x%08x\n", cmdarg);
+	printk("SDICmdCon: 0x%08x\n", cmdcon);
+	printk("SDICmdSta: 0x%08x\n", cmdsta);
+	printk("SDIRSP0:   0x%08x\n", r0);
+	printk("SDIRSP1:   0x%08x\n", r1);
+	printk("SDIRSP2:   0x%08x\n", r2);
+	printk("SDIRSP3:   0x%08x\n", r3);
+	printk("SDIDTimer: 0x%08x\n", timer);
+	printk("SDIBSize:  0x%08x\n", bsize);
+	printk("SDIDatCon: 0x%08x\n", datcon);
+	printk("SDIDatCnt: 0x%08x\n", datcnt);
+	printk("SDIDatSta: 0x%08x\n", datsta);
+	printk("SDIFSta:   0x%08x\n", fsta);
+	printk("SDIIntMsk: 0x%08x\n", imask);
+}
+
+static inline void s3c24xx_hcd_clear_imask(struct s3c24xx_hcd_context * context)
+{
+	if (context->int_sdio) {
+		writel(S3C2410_SDIIMSK_SDIOIRQ | S3C2410_SDIIMSK_READWAIT,
+		       context->base + S3C2440_SDIIMSK);
+	}  else {
+		writel(0, context->base + S3C2440_SDIIMSK);
+	}
+}
+
+static inline void s3c24xx_hcd_set_imask(struct s3c24xx_hcd_context * context)
+{
+	writel(context->int_mask, context->base + S3C2440_SDIIMSK);
+}
+
+
+static inline void s3c24xx_hcd_clear_dsta(struct s3c24xx_hcd_context * context)
+{
+	u32 dsta;
+
+	dsta = readl(context->base + S3C2410_SDIDSTA);
+	writel(dsta, context->base + S3C2410_SDIDSTA);
+}
+
+static inline void s3c24xx_hcd_clear_csta(struct s3c24xx_hcd_context * context)
+{
+	u32 csta, csta_clear = 0;
+
+	csta = readl(context->base + S3C2410_SDICMDSTAT);
+
+	if (csta & S3C2410_SDICMDSTAT_CRCFAIL)
+		csta_clear |= S3C2410_SDICMDSTAT_CRCFAIL;
+	if (csta & S3C2410_SDICMDSTAT_CMDSENT)
+		csta_clear |= S3C2410_SDICMDSTAT_CMDSENT;
+	if (csta & S3C2410_SDICMDSTAT_CMDTIMEOUT)
+		csta_clear |= S3C2410_SDICMDSTAT_CMDTIMEOUT;
+	if (csta & S3C2410_SDICMDSTAT_RSPFIN)
+		csta_clear |= S3C2410_SDICMDSTAT_RSPFIN;
+
+	writel(csta_clear, context->base + S3C2410_SDICMDSTAT);
+}
+
+static inline void s3c24xx_hcd_clear_sta(struct s3c24xx_hcd_context * context)
+{
+	u32 csta, dsta, csta_clear = 0, dsta_clear = 0;
+
+	csta = readl(context->base + S3C2410_SDICMDSTAT);
+	dsta = readl(context->base + S3C2410_SDIDSTA);
+
+	if (csta & S3C2410_SDICMDSTAT_CRCFAIL)
+		csta_clear |= S3C2410_SDICMDSTAT_CRCFAIL;
+	if (csta & S3C2410_SDICMDSTAT_CMDSENT)
+		csta_clear |= S3C2410_SDICMDSTAT_CMDSENT;
+	if (csta & S3C2410_SDICMDSTAT_CMDTIMEOUT)
+		csta_clear |= S3C2410_SDICMDSTAT_CMDTIMEOUT;
+	if (csta & S3C2410_SDICMDSTAT_RSPFIN)
+		csta_clear |= S3C2410_SDICMDSTAT_RSPFIN;
+
+
+	if (dsta & S3C2410_SDIDSTA_RDYWAITREQ)
+		dsta_clear |= S3C2410_SDIDSTA_RDYWAITREQ;
+	if (dsta & S3C2410_SDIDSTA_SDIOIRQDETECT)
+		dsta_clear |= S3C2410_SDIDSTA_SDIOIRQDETECT;
+	if (dsta & S3C2410_SDIDSTA_FIFOFAIL)
+		dsta_clear |= S3C2410_SDIDSTA_FIFOFAIL;
+	if (dsta & S3C2410_SDIDSTA_CRCFAIL)
+		dsta_clear |= S3C2410_SDIDSTA_CRCFAIL;
+	if (dsta & S3C2410_SDIDSTA_RXCRCFAIL)
+		dsta_clear |= S3C2410_SDIDSTA_RXCRCFAIL;
+	if (dsta & S3C2410_SDIDSTA_DATATIMEOUT)
+		dsta_clear |= S3C2410_SDIDSTA_DATATIMEOUT;
+	if (dsta & S3C2410_SDIDSTA_XFERFINISH)
+		dsta_clear |= S3C2410_SDIDSTA_XFERFINISH;
+	if (dsta & S3C2410_SDIDSTA_BUSYFINISH)
+		dsta_clear |= S3C2410_SDIDSTA_BUSYFINISH;
+	if (dsta & S3C2410_SDIDSTA_SBITERR)
+		dsta_clear |= S3C2410_SDIDSTA_SBITERR;
+
+	writel(csta_clear, context->base + S3C2410_SDICMDSTAT);
+	writel(dsta_clear, context->base + S3C2410_SDIDSTA);
+}
+
+static inline void s3c24xx_hcd_fifo_reset(struct s3c24xx_hcd_context * context)
+{
+	u32 fsta;
+
+	fsta = readl(context->base + S3C2410_SDIFSTA);
+	fsta |= S3C2440_SDIFSTA_FIFORESET;
+	writel(fsta, context->base + S3C2410_SDIFSTA);
+}
+
+#if 0
+static void s3c24xx_hcd_reset(struct s3c24xx_hcd_context * context)
+{
+	u32 con, counter;
+	unsigned long flags;
+
+	spin_lock_irqsave(&context->lock, flags);
+
+	con = readl(context->base + S3C2410_SDICON);
+
+	con |= S3C2440_SDICON_SDRESET;
+
+	writel(con, context->base + S3C2410_SDICON);
+
+	counter = 1000;
+	while(counter) {
+		con = readl(context->base + S3C2410_SDICON);
+		if (!(con & S3C2440_SDICON_SDRESET))
+			break;
+		counter--;
+		mdelay(1);
+	}
+
+	spin_unlock_irqrestore(&context->lock, flags);
+}
+#endif
+
+static SDIO_STATUS s3c24xx_hcd_clock_enable(struct s3c24xx_hcd_context * context,
+					    unsigned int clock_rate,
+					    unsigned char enable)
+{
+	SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+	unsigned long flags;
+	u32 con;
+
+	spin_lock_irqsave(&context->lock, flags);
+
+	con = readl(context->base + S3C2410_SDICON);
+
+	if (enable && clock_rate) {
+		con |= S3C2410_SDICON_CLOCKTYPE;
+	} else {
+		con &= ~S3C2410_SDICON_CLOCKTYPE;
+	}
+
+	if (clock_rate) {
+		int prescaler;
+
+		for (prescaler = 0; prescaler < 0xff; prescaler++) {
+			context->device.actual_clock_rate =
+				context->device.max_clock_rate / (prescaler + 1);
+
+			if (context->device.actual_clock_rate <= clock_rate &&
+			    context->device.actual_clock_rate <= context->hcd.MaxClockRate)
+				break;
+		}
+
+		if (prescaler == 0xff)
+			DBG_PRINT(SDDBG_ERROR , ("Using lowest clock rate\n"));
+
+		writel(prescaler, context->base + S3C2410_SDIPRE);
+	}
+
+	writel(con, context->base + S3C2410_SDICON);
+
+	spin_unlock_irqrestore(&context->lock, flags);
+
+	return SDIOErrorToOSError(status);
+}
+
+static void s3c24xx_hcd_set_bus_mode(struct s3c24xx_hcd_context *context,
+				     PSDCONFIG_BUS_MODE_DATA pMode)
+{
+	u32 datacon;
+	unsigned long flags;
+
+	DBG_PRINT(SDDBG_TRACE , ("SetBusMode\n"));
+
+	spin_lock_irqsave(&context->lock, flags);
+	datacon = readl(context->base + S3C2410_SDIDCON);
+
+	switch (SDCONFIG_GET_BUSWIDTH(pMode->BusModeFlags)) {
+        case SDCONFIG_BUS_WIDTH_1_BIT:
+		context->bus_width = 1;
+		datacon &= S3C2410_SDIDCON_WIDEBUS;
+		break;
+        case SDCONFIG_BUS_WIDTH_4_BIT:
+		context->bus_width = 4;
+		datacon |= S3C2410_SDIDCON_WIDEBUS;
+		break;
+        default:
+		DBG_PRINT(SDDBG_TRACE , ("Unknown bus width: %d\n", SDCONFIG_GET_BUSWIDTH(pMode->BusModeFlags)));
+		break;
+	}
+
+	writel(datacon, context->base + S3C2410_SDIDCON);
+	spin_unlock_irqrestore(&context->lock, flags);
+
+	/* Set clock rate and enable clock */
+	s3c24xx_hcd_clock_enable(context, pMode->ClockRate, 1);
+	pMode->ActualClockRate = context->device.actual_clock_rate;
+
+ 	DBG_PRINT(SDDBG_TRACE , ("BUS mode: %d bits wide, actual clock rate: %d kHz (requested %d kHz)\n",
+				 context->bus_width, pMode->ActualClockRate / 1000, pMode->ClockRate / 1000));
+}
+
+
+static void s3c24xx_hcd_dma_complete(struct s3c24xx_hcd_context * context)
+{
+	u32 dsta, counter, i;
+	PSDREQUEST req;
+	SDIO_STATUS status = SDIO_STATUS_ERROR;
+
+	req = GET_CURRENT_REQUEST(&context->hcd);
+	if (req == NULL) {
+		DBG_PRINT(SDDBG_ERROR, ("%s(): No current request\n", __FUNCTION__));
+		return;
+	}
+
+	if (context->complete == S3C24XX_HCD_DATA_READ) {
+		/* DMA READ completion */
+		if (context->latest_xfer_size != req->DataRemaining) {
+			DBG_PRINT(SDDBG_ERROR, ("Unexpected read xfer size: %d <-> %d\n",
+						context->latest_xfer_size, req->DataRemaining));
+			status = SDIO_STATUS_BUS_WRITE_ERROR;
+		}
+
+		counter = 0;
+		dsta = readl(context->base + S3C2410_SDIDSTA);
+		while (!(dsta & S3C2410_SDIDSTA_XFERFINISH)) {
+			if (counter > 500) {
+				printk("read xfer timed out\n");
+				s3c24xx_dump_regs(context);
+				memcpy(req->pDataBuffer, context->io_buffer,
+				       req->BlockCount * req->BlockLen);
+				printk("Transfer: %dx%d\n", req->BlockCount, req->BlockLen);
+				for (i = 0; i < req->DataRemaining; i++)
+					printk("0x%x ", *(((char *)context->io_buffer) + i));
+				printk("\n");
+				status = SDIO_STATUS_BUS_READ_TIMEOUT;
+				goto out;
+			}
+			dsta = readl(context->base + S3C2410_SDIDSTA);
+			counter++;
+			mdelay(1);
+		};
+
+		dma_sync_single(NULL, context->io_buffer_dma,
+				req->BlockCount * req->BlockLen, DMA_BIDIRECTIONAL);
+
+		writel(S3C2410_SDIDSTA_XFERFINISH, context->base + S3C2410_SDIDSTA);
+
+		memcpy(req->pDataBuffer, context->io_buffer,
+		       req->BlockCount * req->BlockLen);
+
+		req->DataRemaining = 0;
+		status = SDIO_STATUS_SUCCESS;
+
+	} else if (context->complete == S3C24XX_HCD_DATA_WRITE) {
+		/* DMA WRITE completion */
+		if (context->latest_xfer_size != req->DataRemaining) {
+			DBG_PRINT(SDDBG_ERROR, ("Unexpected write xfer size: %d <-> %d\n",
+						context->latest_xfer_size, req->DataRemaining));
+			status = SDIO_STATUS_BUS_WRITE_ERROR;
+		}
+
+		dsta = readl(context->base + S3C2410_SDIDSTA);
+		counter = 0;
+		while (!(dsta & S3C2410_SDIDSTA_XFERFINISH)) {
+			if (counter > 500) {
+				printk("write xfer timed out\n");
+				status = SDIO_STATUS_BUS_WRITE_ERROR;
+				goto out;
+			}
+			dsta = readl(context->base + S3C2410_SDIDSTA);
+			counter++;
+			mdelay(1);
+		};
+
+		writel(S3C2410_SDIDSTA_XFERFINISH, context->base + S3C2410_SDIDSTA);
+		req->DataRemaining = 0;
+		status = SDIO_STATUS_SUCCESS;
+	}
+
+ out:
+	req->Status = status;
+}
+
+static void s3c24xx_hcd_pio_complete(struct s3c24xx_hcd_context * context)
+{
+	u32 fsta, counter;
+	u8 *ptr;
+	int fifo_count;
+	PSDREQUEST req;
+	SDIO_STATUS status = SDIO_STATUS_ERROR;
+
+	req = GET_CURRENT_REQUEST(&context->hcd);
+	if (req == NULL) {
+		DBG_PRINT(SDDBG_ERROR, ("%s(): No current request\n", __FUNCTION__));
+		return;
+	}
+
+	ptr = req->pDataBuffer;
+
+	if (context->complete == S3C24XX_HCD_DATA_READ) {
+		counter = 0;
+		DBG_PRINT(SDDBG_TRACE, ("Data read..."));
+		do {
+			counter++;
+			fsta = readl(context->base + S3C2410_SDIFSTA);
+			mdelay(1);
+			if (counter > 1000) {
+				DBG_PRINT(SDDBG_ERROR, ("DATA read timeout\n"));
+				status = SDIO_STATUS_BUS_READ_TIMEOUT;
+				s3c24xx_dump_regs(context);
+				goto out;
+			}
+		} while(!(fsta & S3C2410_SDIFSTA_RFDET));
+		DBG_PRINT(SDDBG_TRACE, ("RX detected\n"));
+
+		while (1) {
+			counter = 0;
+			fifo_count = (readl(context->base + S3C2410_SDIFSTA) & S3C2410_SDIFSTA_COUNTMASK);
+			while (!fifo_count) {
+				counter++;
+				mdelay(1);
+				if (counter > 500) {
+					s3c24xx_dump_regs(context);
+					DBG_PRINT(SDDBG_ERROR, ("No more bytes in FIFO\n"));
+					goto out;
+				}
+				fifo_count = (readl(context->base + S3C2410_SDIFSTA) & S3C2410_SDIFSTA_COUNTMASK);
+			}
+
+			if (fifo_count > req->DataRemaining) {
+				DBG_PRINT(SDDBG_ERROR, ("DATA read, fifo_count %d > expected %d\n", fifo_count, req->DataRemaining));
+				fifo_count = req->DataRemaining;
+			}
+
+			req->DataRemaining -= fifo_count;
+			while (fifo_count > 0) {
+				if (context->data_size == 4)
+					*(ptr) = readl(context->base + S3C2440_SDIDATA);
+				else if (context->data_size == 2)
+					*(ptr) = readw(context->base + S3C2440_SDIDATA);
+				else
+					*(ptr) = readb(context->base + S3C2440_SDIDATA);
+
+				ptr += context->data_size;
+				fifo_count -= context->data_size;
+
+			}
+
+			if (!req->DataRemaining) {
+				/* We poll for xfer finish */
+				counter = 0;
+				while (!(readl(context->base + S3C2410_SDIDSTA)
+						 & S3C2410_SDIDSTA_XFERFINISH)) {
+					counter++;
+					mdelay(1);
+					if (counter > 500) {
+						DBG_PRINT(SDDBG_ERROR, ("RX XFERFINISH missing\n"));
+						s3c24xx_dump_regs(context);
+						break;
+					}
+				}
+
+				status = SDIO_STATUS_SUCCESS;
+				goto out;
+			}
+		}
+
+	} else if (context->complete == S3C24XX_HCD_DATA_WRITE) {
+		counter = 0;
+		DBG_PRINT(SDDBG_TRACE, ("Data write..."));
+		do {
+			counter++;
+			fsta = readl(context->base + S3C2410_SDIFSTA);
+			mdelay(1);
+			if (counter > 1000) {
+				DBG_PRINT(SDDBG_ERROR, ("DATA write timeout\n"));
+				status = SDIO_STATUS_BUS_WRITE_ERROR;
+				goto out;
+				break;
+			}
+
+		} while(!(fsta & S3C2410_SDIFSTA_TFDET));
+		DBG_PRINT(SDDBG_TRACE, ("TX detected\n"));
+
+		while (1) {
+			counter = 0;
+			fifo_count = 63 - (readl(context->base + S3C2410_SDIFSTA) & S3C2410_SDIFSTA_COUNTMASK);
+			while (!fifo_count) {
+				counter++;
+				mdelay(1);
+				if (counter > 500) {
+					s3c24xx_dump_regs(context);
+					DBG_PRINT(SDDBG_ERROR, ("No more space in FIFO\n"));
+					goto out;
+				}
+				fifo_count = 63 - (readl(context->base + S3C2410_SDIFSTA) & S3C2410_SDIFSTA_COUNTMASK);
+			}
+
+			if (fifo_count > req->DataRemaining)
+				fifo_count = req->DataRemaining;
+
+				req->DataRemaining -= fifo_count;
+
+				while (fifo_count > 0) {
+					if (context->data_size == 4)
+						writel(*(ptr), context->base + S3C2440_SDIDATA);
+					else if (context->data_size == 2)
+						writew(*(ptr), context->base + S3C2440_SDIDATA);
+					else
+						writeb(*(ptr), context->base + S3C2440_SDIDATA);
+
+					ptr += context->data_size;
+					fifo_count -= context->data_size;
+				}
+
+				if (!req->DataRemaining) {
+					/* We poll for xfer finish */
+					counter = 0;
+					while (!(readl(context->base + S3C2410_SDIDSTA)
+						 & S3C2410_SDIDSTA_XFERFINISH)) {
+						counter++;
+						mdelay(1);
+						if (counter > 500) {
+							DBG_PRINT(SDDBG_ERROR, ("RX XFERFINISH missing\n"));
+							s3c24xx_dump_regs(context);
+							break;
+						}
+					}
+
+					status = SDIO_STATUS_SUCCESS;
+					goto out;
+				}
+		}
+
+	} else {
+		DBG_PRINT(SDDBG_ERROR, ("Wrong context: %d\n", context->complete));
+	}
+
+ out:
+	req->Status = status;
+}
+
+static void s3c24xx_hcd_io_work(struct work_struct *work)
+{
+	PSDREQUEST req;
+	SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+	struct s3c24xx_hcd_context * context =
+		container_of(work, struct s3c24xx_hcd_context, io_work);
+
+	req = GET_CURRENT_REQUEST(&context->hcd);
+	if (req == NULL) {
+		DBG_PRINT(SDDBG_ERROR, ("%s(): No current request\n", __FUNCTION__));
+		return;
+	}
+
+	if (req->Status == SDIO_STATUS_BUS_RESP_TIMEOUT) {
+		DBG_PRINT(SDDBG_ERROR, ("### TIMEOUT ###\n"));
+		s3c24xx_dump_regs(context);
+		goto out;
+	}
+
+	if (context->complete == S3C24XX_HCD_NO_RESPONSE &&
+	    req->Status == SDIO_STATUS_SUCCESS) {
+		DBG_PRINT(SDDBG_TRACE, ("CMD done, Status: %d\n", req->Status));
+		printk("CMD done, Status: %d\n", req->Status);
+		goto out;
+	}
+
+	if ((context->complete == S3C24XX_HCD_RESPONSE_SHORT ||
+	     context->complete == S3C24XX_HCD_RESPONSE_LONG ||
+	     context->complete == S3C24XX_HCD_DATA_READ ||
+	     context->complete == S3C24XX_HCD_DATA_WRITE) &&
+	    req->Status == SDIO_STATUS_SUCCESS) {
+		u32 resp[4];
+
+		/* We need to copy the response data and send it over */
+		resp[0] = readl(context->base + S3C2410_SDIRSP0);
+		resp[1] = readl(context->base + S3C2410_SDIRSP1);
+		resp[2] = readl(context->base + S3C2410_SDIRSP2);
+		resp[3] = readl(context->base + S3C2410_SDIRSP3);
+
+		if (GET_SDREQ_RESP_TYPE(req->Flags) != SDREQ_FLAGS_RESP_R2) {
+			DBG_PRINT(SDDBG_TRACE, ("SHORT response: 0x%08x\n", resp[0]));
+			memcpy(&req->Response[1], (u8*)resp, 4);
+			req->Response[5] = (readl(context->base + S3C2410_SDICMDSTAT) & 0xff);
+		} else {
+			printk("LONG response: 0x%08x\n", resp[0]);
+			DBG_PRINT(SDDBG_TRACE, ("LONG response: 0x%08x\n", resp[0]));
+			memcpy(&req->Response[1], (u8*)resp, 16);
+			//req->Response[17] = (readl(context->base + S3C2410_SDICMDSTAT) & 0xff);
+		}
+
+		/* There is a data stage */
+		if (context->complete == S3C24XX_HCD_DATA_READ ||
+		    context->complete == S3C24XX_HCD_DATA_WRITE) {
+			status = SDIO_CheckResponse(&context->hcd, req,
+						    SDHCD_CHECK_DATA_TRANS_OK);
+
+			if (!SDIO_SUCCESS(status)) {
+				DBG_PRINT(SDDBG_ERROR,
+					  ("Target not ready for data xfer\n"));
+				return;
+			}
+
+			if (context->dma_en) {
+				dma_sync_single(NULL, context->io_buffer_dma,
+						req->BlockCount * req->BlockLen, DMA_BIDIRECTIONAL);
+
+				s3c2410_dma_ctrl(context->dma_channel, S3C2410_DMAOP_START);
+
+				wait_for_completion(&context->dma_complete);
+
+				s3c24xx_hcd_dma_complete(context);
+			} else {
+				s3c24xx_hcd_pio_complete(context);
+			}
+		}
+	}
+
+ out:
+	s3c24xx_hcd_clear_sta(context);
+	s3c24xx_hcd_clear_imask(context);
+
+	writel(0, context->base + S3C2410_SDICMDARG);
+	writel(0, context->base + S3C2410_SDICMDCON);
+
+	SDIO_HandleHcdEvent(&context->hcd, EVENT_HCD_TRANSFER_DONE);
+}
+
+static void s3c24xx_hcd_irq_work(struct work_struct *work)
+{
+	struct s3c24xx_hcd_context * context =
+		container_of(work, struct s3c24xx_hcd_context, irq_work);
+
+	disable_irq(context->io_irq);
+
+	writel(S3C2410_SDIDSTA_SDIOIRQDETECT, context->base + S3C2410_SDIDSTA);
+
+	SDIO_HandleHcdEvent(&context->hcd, EVENT_HCD_SDIO_IRQ_PENDING);
+
+	enable_irq(context->io_irq);
+}
+
+void s3c24xx_hcd_dma_done(struct s3c2410_dma_chan *dma_ch, void *buf_id,
+			  int size, enum s3c2410_dma_buffresult result)
+{
+	struct s3c24xx_hcd_context * context =
+		(struct s3c24xx_hcd_context *) buf_id;
+
+	if (result != S3C2410_RES_OK) {
+		DBG_PRINT(SDDBG_ERROR, ("%s(): DMA xfer failed: %d\n", __FUNCTION__, result));
+		s3c24xx_dump_regs(context);
+	}
+
+	context->latest_xfer_size = size;
+	complete(&context->dma_complete);
+}
+
+static int s3c24xx_hcd_prepare_dma(struct s3c24xx_hcd_context * context)
+{
+	PSDREQUEST req;
+	SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+	int read = 0, hwcfg = S3C2410_DISRCC_INC | S3C2410_DISRCC_APB;
+	enum s3c2410_dmasrc source = S3C2410_DMASRC_MEM;
+
+	req = GET_CURRENT_REQUEST(&context->hcd);
+	if (req == NULL) {
+		DBG_PRINT(SDDBG_ERROR, ("%s(): No current request\n", __FUNCTION__));
+		status = SDIO_STATUS_ERROR;
+	}
+
+	if (!context->dma_en) {
+		DBG_PRINT(SDDBG_ERROR, ("%s(): DMA is disabled\n", __FUNCTION__));
+		status = SDIO_STATUS_ERROR;
+	}
+
+	if (!IS_SDREQ_DATA_TRANS(req->Flags)) {
+		DBG_PRINT(SDDBG_ERROR, ("%s(): No data to transfer\n", __FUNCTION__));
+		status = SDIO_STATUS_ERROR;
+	}
+
+	if(!IS_SDREQ_WRITE_DATA(req->Flags)) {
+		read = 1;
+		source = S3C2410_DMASRC_HW;
+		hwcfg = S3C2410_DISRCC_APB | 1;
+	} else {
+		memcpy(context->io_buffer, req->pDataBuffer, req->DataRemaining);
+		dma_sync_single(NULL, context->io_buffer_dma,
+				req->BlockCount * req->BlockLen, DMA_BIDIRECTIONAL);
+
+	}
+
+	s3c2410_dma_devconfig(context->dma_channel, source, hwcfg,
+			      (unsigned long)context->mem->start + S3C2440_SDIDATA);
+
+	s3c2410_dma_config(context->dma_channel, context->data_size,
+			   S3C2410_DCON_CH0_SDI);
+			   //(S3C2410_DCON_HWTRIG | S3C2410_DCON_CH0_SDI));
+
+	s3c2410_dma_set_buffdone_fn(context->dma_channel, s3c24xx_hcd_dma_done);
+
+//	s3c2410_dma_setflags(context->dma_channel, S3C2410_DMAF_AUTOSTART);
+
+	s3c2410_dma_ctrl(context->dma_channel, S3C2410_DMAOP_FLUSH);
+
+	s3c2410_dma_enqueue(context->dma_channel, context,
+			    context->io_buffer_dma,
+			    req->DataRemaining);
+
+	return 0;
+}
+
+
+static irqreturn_t s3c24xx_hcd_irq(int irq, void *dev_id)
+{
+	u32 cmdsta, dsta, fsta;
+	unsigned long flags, trace = 0;
+	PSDREQUEST req;
+	struct s3c24xx_hcd_context * context =
+		(struct s3c24xx_hcd_context *)dev_id;
+
+	spin_lock_irqsave(&context->lock, flags);
+
+	s3c24xx_hcd_clear_imask(context);
+
+	cmdsta = readl(context->base + S3C2410_SDICMDSTAT);
+	dsta = readl(context->base + S3C2410_SDIDSTA);
+	fsta = readl(context->base + S3C2410_SDIFSTA);
+
+	context->cmdsta = cmdsta;
+	context->dsta = dsta;
+	context->fsta = fsta;
+
+	s3c24xx_hcd_clear_csta(context);
+
+	if (dsta & S3C2410_SDIDSTA_SDIOIRQDETECT) {
+		writel(S3C2410_SDIDSTA_SDIOIRQDETECT, context->base + S3C2410_SDIDSTA);
+
+		if (context->int_sdio) {
+			u32 imask;
+
+			context->int_sdio = 0;
+
+			imask = readl(context->base + S3C2440_SDIIMSK);
+			imask &= ~S3C2410_SDIIMSK_SDIOIRQ;
+			writel(imask, context->base + S3C2440_SDIIMSK);
+			schedule_work(&context->irq_work);
+		}
+	}
+
+	req = GET_CURRENT_REQUEST(&context->hcd);
+	if (req == NULL) {
+		DBG_PRINT(SDDBG_TRACE, ("%s(): No current request\n", __FUNCTION__));
+		goto out;
+	}
+
+	if (cmdsta & S3C2410_SDICMDSTAT_CMDTIMEOUT) {
+		DBG_PRINT(SDDBG_ERROR, ("TIMEOUT\n"));
+		printk("TIMEOUT\n");
+		req->Status = SDIO_STATUS_BUS_RESP_TIMEOUT;
+		writel(S3C2410_SDICMDSTAT_CMDTIMEOUT, context->base + S3C2410_SDICMDSTAT);
+		schedule_work(&context->io_work);
+	}
+
+	if (cmdsta & S3C2410_SDICMDSTAT_CRCFAIL) {
+		DBG_PRINT(SDDBG_ERROR, ("CRCFAIL 0x%x\n", cmdsta));
+		printk("CRCFAIL 0x%x\n", cmdsta);
+		req->Status = SDIO_STATUS_BUS_RESP_CRC_ERR;
+		dump_request(context);
+		writel(S3C2410_SDICMDSTAT_CRCFAIL, context->base + S3C2410_SDICMDSTAT);
+		schedule_work(&context->io_work);
+	}
+
+
+	if (cmdsta & S3C2410_SDICMDSTAT_CMDSENT) {
+		writel(S3C2410_SDICMDSTAT_CMDSENT, context->base + S3C2410_SDICMDSTAT);
+
+		if (context->complete == S3C24XX_HCD_NO_RESPONSE) {
+			req->Status = SDIO_STATUS_SUCCESS;
+			trace = 1;
+			schedule_work(&context->io_work);
+		}
+	}
+
+	if (cmdsta & S3C2410_SDICMDSTAT_RSPFIN ||
+	    (IS_SDREQ_WRITE_DATA(req->Flags) && (fsta &  S3C2410_SDIFSTA_TFDET)) ||
+	    (!IS_SDREQ_WRITE_DATA(req->Flags) && (fsta &  S3C2410_SDIFSTA_RFDET))) {
+
+		writel(S3C2410_SDICMDSTAT_RSPFIN, context->base + S3C2410_SDICMDSTAT);
+
+		if (context->complete == S3C24XX_HCD_RESPONSE_SHORT ||
+		    context->complete == S3C24XX_HCD_RESPONSE_LONG ||
+		    context->complete == S3C24XX_HCD_DATA_READ ||
+		    context->complete == S3C24XX_HCD_DATA_WRITE) {
+			req->Status = SDIO_STATUS_SUCCESS;
+			if (trace)
+				printk("IO work already scheduled, cmdsta: 0x%x\n", cmdsta);
+			schedule_work(&context->io_work);
+		}
+	}
+
+ out:
+	if (dsta & S3C2410_SDIDSTA_RDYWAITREQ) {
+		printk("S3C2410_SDIDSTA_RDYWAITREQ\n");
+		//writel(S3C2410_SDIDSTA_RDYWAITREQ, context->base + S3C2410_SDIDSTA);
+	}
+
+	if (dsta & S3C2410_SDIDSTA_FIFOFAIL) {
+		printk("S3C2410_SDIDSTA_FIFOFAIL\n");
+		writel(S3C2410_SDIDSTA_FIFOFAIL, context->base + S3C2410_SDIDSTA);
+	}
+
+	if (dsta & S3C2410_SDIDSTA_CRCFAIL) {
+		printk("S3C2410_SDIDSTA_CRCFAIL\n");
+		writel(S3C2410_SDIDSTA_CRCFAIL, context->base + S3C2410_SDIDSTA);
+	}
+
+	if (dsta & S3C2410_SDIDSTA_RXCRCFAIL) {
+		printk("S3C2410_SDIDSTA_RXCRCFAIL\n");
+		writel(S3C2410_SDIDSTA_RXCRCFAIL, context->base + S3C2410_SDIDSTA);
+	}
+
+	if (dsta & S3C2410_SDIDSTA_DATATIMEOUT) {
+		printk("S3C2410_SDIDSTA_DATATIMEOUT\n");
+		writel(S3C2410_SDIDSTA_DATATIMEOUT, context->base + S3C2410_SDIDSTA);
+	}
+
+	if (dsta & S3C2410_SDIDSTA_BUSYFINISH) {
+		printk("S3C2410_SDIDSTA_BUSYFINISH\n");
+		writel(S3C2410_SDIDSTA_BUSYFINISH, context->base + S3C2410_SDIDSTA);
+	}
+
+	if (dsta & S3C2410_SDIDSTA_SBITERR) {
+		printk("S3C2410_SDIDSTA_SBIERR\n");
+		writel(S3C2410_SDIDSTA_SBITERR, context->base + S3C2410_SDIDSTA);
+	}
+
+	spin_unlock_irqrestore(&context->lock, flags);
+	return IRQ_HANDLED;
+}
+
+
+SDIO_STATUS s3c24xx_hcd_config(PSDHCD hcd, PSDCONFIG config)
+{
+	u32 con, imsk;
+	SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+	PSDCONFIG_SDIO_INT_CTRL_DATA int_data;
+	struct s3c24xx_hcd_context * context = (struct s3c24xx_hcd_context *)hcd->pContext;
+
+	switch (GET_SDCONFIG_CMD(config)){
+	case SDCONFIG_GET_WP:
+		DBG_PRINT(SDDBG_TRACE, ("config GET_WP\n"));
+		*((SDCONFIG_WP_VALUE *)config->pData) = 0;
+		status = SDIO_STATUS_SUCCESS;
+		break;
+	case SDCONFIG_SEND_INIT_CLOCKS:
+		DBG_PRINT(SDDBG_TRACE, ("config SEND_INIT_CLOCKS\n"));
+
+		/* We stop/start the clock */
+		con = readl(context->base + S3C2410_SDICON);
+
+		con &= ~S3C2410_SDICON_CLOCKTYPE;
+		writel(con, context->base + S3C2410_SDICON);
+
+		mdelay(100);
+
+		con |= S3C2410_SDICON_CLOCKTYPE;
+		writel(con, context->base + S3C2410_SDICON);
+
+		mdelay(100);
+
+		status = SDIO_STATUS_SUCCESS;
+		break;
+        case SDCONFIG_SDIO_INT_CTRL:
+		DBG_PRINT(SDDBG_TRACE, ("config SDIO_INT_CTRL\n"));
+		int_data =  GET_SDCONFIG_CMD_DATA(PSDCONFIG_SDIO_INT_CTRL_DATA, config);
+
+		if (int_data->SlotIRQEnable &
+		    (IRQ_DETECT_1_BIT | IRQ_DETECT_4_BIT | IRQ_DETECT_MULTI_BLK) ) {
+			imsk = readl(context->base + S3C2440_SDIIMSK);
+
+			if (int_data->SlotIRQEnable) {
+				printk("SDIO_INT_CTRL enable IRQ\n");
+				DBG_PRINT(SDDBG_TRACE, ("SDIO_INT_CTRL enable IRQ\n"));
+				context->int_sdio = 1;
+				imsk |= S3C2410_SDIIMSK_SDIOIRQ;
+				writel(imsk, context->base + S3C2440_SDIIMSK);
+			} else {
+				printk("SDIO_INT_CTRL disable IRQ\n");
+				DBG_PRINT(SDDBG_TRACE, ("SDIO_INT_CTRL disable IRQ\n"));
+				context->int_sdio = 0;
+				imsk &= ~S3C2410_SDIIMSK_SDIOIRQ;
+				writel(imsk, context->base + S3C2440_SDIIMSK);
+			}
+		}
+		status = SDIO_STATUS_SUCCESS;
+		break;
+        case SDCONFIG_SDIO_REARM_INT:
+		DBG_PRINT(SDDBG_TRACE, ("config SDIO_REARM_INT\n"));
+
+		context->int_sdio = 1;
+		imsk = readl(context->base + S3C2440_SDIIMSK);
+		imsk |= S3C2410_SDIIMSK_SDIOIRQ;
+		writel(imsk, context->base + S3C2440_SDIIMSK);
+
+		status = SDIO_STATUS_SUCCESS;
+		break;
+	case SDCONFIG_FUNC_CHANGE_BUS_MODE:
+        case SDCONFIG_BUS_MODE_CTRL:
+		s3c24xx_hcd_set_bus_mode(context, (PSDCONFIG_BUS_MODE_DATA)(config->pData));
+		DBG_PRINT(SDDBG_TRACE, ("config BUS_MODE_CTRL\n"));
+		status = SDIO_STATUS_SUCCESS;
+		break;
+        case SDCONFIG_POWER_CTRL:
+		DBG_PRINT(SDDBG_TRACE, ("config POWER_CTRL\n"));
+		status = SDIO_STATUS_SUCCESS;
+		break;
+        case SDCONFIG_GET_HCD_DEBUG:
+		DBG_PRINT(SDDBG_TRACE, ("config GET_HCD_DEBUG\n"));
+		status = SDIO_STATUS_SUCCESS;
+		break;
+        case SDCONFIG_SET_HCD_DEBUG:
+		DBG_PRINT(SDDBG_TRACE, ("config SET_HCD_DEBUG\n"));
+		status = SDIO_STATUS_SUCCESS;
+		break;
+	default:
+		/* invalid request */
+		DBG_PRINT(SDDBG_ERROR, ("%s() - unsupported command: 0x%X\n",
+				       __FUNCTION__, GET_SDCONFIG_CMD(config)));
+		status = SDIO_STATUS_INVALID_PARAMETER;
+	}
+
+	return SDIOErrorToOSError(status);
+}
+
+
+SDIO_STATUS s3c24xx_hcd_request(PSDHCD hcd)
+{
+	SDIO_STATUS status = SDIO_STATUS_PENDING;
+	PSDREQUEST req;
+	u32 cmdcon, imask;
+	unsigned long flags;
+	struct s3c24xx_hcd_context * context =
+		(struct s3c24xx_hcd_context *)hcd->pContext;
+
+	req = GET_CURRENT_REQUEST(hcd);
+	DBG_ASSERT(req != NULL);
+
+	if (req->Flags & SDREQ_FLAGS_DATA_SHORT_TRANSFER)
+		printk("### SHORT TRANSFER ###\n");
+
+	spin_lock_irqsave(&context->lock, flags);
+
+	/* Clear command, data and fifo status registers */
+	writel(0xFFFFFFFF, context->base + S3C2410_SDICMDSTAT);
+	writel(0xFFFFFFFF, context->base + S3C2410_SDIDSTA);
+	writel(0xFFFFFFFF, context->base + S3C2410_SDIFSTA);
+
+	/* Enabling irqs */
+	imask = S3C2410_SDIIMSK_READWAIT;
+
+	cmdcon = readl(context->base + S3C2410_SDICMDCON);
+
+        switch (GET_SDREQ_RESP_TYPE(req->Flags)) {
+	case SDREQ_FLAGS_NO_RESP:
+		cmdcon &= ~S3C2410_SDICMDCON_WAITRSP;
+		context->complete = S3C24XX_HCD_NO_RESPONSE;
+		imask |= S3C2410_SDIIMSK_CMDSENT;
+                break;
+	case SDREQ_FLAGS_RESP_R1:
+	case SDREQ_FLAGS_RESP_R1B:
+	case SDREQ_FLAGS_RESP_R3:
+	case SDREQ_FLAGS_RESP_SDIO_R4:
+	case SDREQ_FLAGS_RESP_SDIO_R5:
+	case SDREQ_FLAGS_RESP_R6:
+		cmdcon &= ~S3C2410_SDICMDCON_LONGRSP;
+		cmdcon |= S3C2410_SDICMDCON_WAITRSP;
+		context->complete = S3C24XX_HCD_RESPONSE_SHORT;
+		imask |= S3C2410_SDIIMSK_CRCSTATUS | S3C2410_SDIIMSK_RESPONSEND
+			| S3C2410_SDIIMSK_CMDTIMEOUT | S3C2410_SDIIMSK_RESPONSECRC;
+                break;
+	case SDREQ_FLAGS_RESP_R2:
+		cmdcon |= S3C2410_SDICMDCON_LONGRSP;
+		cmdcon |= S3C2410_SDICMDCON_WAITRSP;
+		context->complete = S3C24XX_HCD_RESPONSE_LONG;
+		imask |= S3C2410_SDIIMSK_CRCSTATUS | S3C2410_SDIIMSK_RESPONSEND
+			| S3C2410_SDIIMSK_CMDTIMEOUT | S3C2410_SDIIMSK_RESPONSECRC;
+                break;
+
+	}
+
+	/* There is a data part */
+	if (IS_SDREQ_DATA_TRANS(req->Flags)) {
+		u32 dcon = 0;
+
+		if (readl(context->base + S3C2410_SDIDSTA) &
+		    (S3C2410_SDIDSTA_TXDATAON | S3C2410_SDIDSTA_RXDATAON)) {
+			printk("##### DATA ON: 0x%x ######\n", readl(context->base + S3C2410_SDIDSTA));
+		}
+
+		/* Setting timer */
+		writel(0x7fffff, context->base + S3C2410_SDITIMER);
+
+		/* Block size */
+		writel(req->BlockLen, context->base + S3C2410_SDIBSIZE);
+		/* Number of blocks */
+		dcon |= (0xfff & req->BlockCount);
+
+		if (context->bus_width == 4)
+			dcon |= S3C2410_SDIDCON_WIDEBUS;
+
+		req->DataRemaining = req->BlockCount * req->BlockLen;
+
+		/* Set data size, and start the transfer */
+		dcon |= S3C2410_SDIDCON_IRQPERIOD;
+		if (!(req->DataRemaining % 4)) {
+			context->data_size = 4;
+			dcon |= S3C2440_SDIDCON_DS_WORD;
+		} else if (!(req->DataRemaining % 2)) {
+			context->data_size = 2;
+			dcon |= S3C2440_SDIDCON_DS_HALFWORD;
+		} else {
+			context->data_size = 1;
+			dcon |= S3C2440_SDIDCON_DS_BYTE;
+		}
+
+#ifdef CONFIG_SDIO_S3C24XX_DMA
+		if (req->DataRemaining > 16) {
+			context->dma_en = 1;
+		} else
+#endif
+		{
+			context->dma_en = 0;
+			context->data_size = 1;
+			dcon |= S3C2440_SDIDCON_DS_BYTE;
+		}
+
+		if (context->dma_en) {
+			dcon |= S3C2410_SDIDCON_DMAEN;
+			s3c24xx_hcd_prepare_dma(context);
+		}
+
+		if (IS_SDREQ_WRITE_DATA(req->Flags)) {
+			/* Data write */
+			DBG_PRINT(SDDBG_TRACE, ("Start data write, block count=%d, block size=%d\n",
+						req->BlockCount, req->BlockLen));
+
+			/* Data configuration: transmit after resp, block mode*/
+			dcon |= S3C2410_SDIDCON_TXAFTERRESP | S3C2410_SDIDCON_BLOCKMODE;
+
+			/* This is a write */
+			dcon |= S3C2410_SDIDCON_XFER_TXSTART;
+
+			imask |= S3C2410_SDIIMSK_TXFIFOHALF | S3C2410_SDIIMSK_TXFIFOEMPTY |
+				S3C2410_SDIIMSK_FIFOFAIL | S3C2410_SDIIMSK_DATACRC |
+				S3C2410_SDIIMSK_DATATIMEOUT | S3C2410_SDIIMSK_DATAFINISH;
+
+			context->complete = S3C24XX_HCD_DATA_WRITE;
+		} else {
+			/* Data read */
+			DBG_PRINT(SDDBG_TRACE, ("Start data read, block count=%d, block size=%d\n",
+						req->BlockCount, req->BlockLen));
+
+			/* Data configuration: receive after cmd, block mode*/
+			dcon |= S3C2410_SDIDCON_RXAFTERCMD | S3C2410_SDIDCON_BLOCKMODE;
+
+			/* This is a read */
+			dcon |= S3C2410_SDIDCON_XFER_RXSTART;
+
+			imask |= S3C2410_SDIIMSK_RXFIFOHALF | S3C2410_SDIIMSK_RXFIFOLAST |
+				S3C2410_SDIIMSK_FIFOFAIL | S3C2410_SDIIMSK_DATACRC |
+				S3C2410_SDIIMSK_DATATIMEOUT | S3C2410_SDIIMSK_DATAFINISH;
+
+			context->complete = S3C24XX_HCD_DATA_READ;
+		}
+
+		dcon |= S3C2440_SDIDCON_DATSTART;
+
+		writel(dcon, context->base + S3C2410_SDIDCON);
+
+		cmdcon |= S3C2410_SDICMDCON_WITHDATA;
+
+	} else {
+		cmdcon &= ~S3C2410_SDICMDCON_WITHDATA;
+	}
+
+	cmdcon |= req->Command & S3C2410_SDICMDCON_INDEX;
+	cmdcon |= S3C2410_SDICMDCON_SENDERHOST | S3C2410_SDICMDCON_CMDSTART;
+
+	req->Status = SDIO_STATUS_PENDING;
+
+	if (context->int_sdio)
+		imask |= S3C2410_SDIIMSK_SDIOIRQ;
+	context->int_mask = imask;
+	writel(imask, context->base + S3C2440_SDIIMSK);
+	writel(req->Argument, context->base + S3C2410_SDICMDARG);
+	writel(cmdcon, context->base + S3C2410_SDICMDCON);
+
+	spin_unlock_irqrestore(&context->lock, flags);
+
+	return status;
+}
+
+static int s3c24xx_hcd_hw_init(struct s3c24xx_hcd_context * context)
+{
+	SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+	u32 con, datacon;
+
+	/* Clock */
+	context->device.clock = clk_get(NULL, "sdi");
+	if (IS_ERR(context->device.clock)) {
+		DBG_PRINT(SDDBG_ERROR, ("Couldn't get clock\n"));
+		status = PTR_ERR(context->device.clock);
+		context->device.clock = NULL;
+		return status;
+	}
+
+	status = clk_enable(context->device.clock);
+	if (SDIO_IS_ERROR(status)) {
+		DBG_PRINT(SDDBG_ERROR, ("Couldn't get clock\n"));
+		return SDIOErrorToOSError(status);
+	}
+
+	context->device.max_clock_rate = clk_get_rate(context->device.clock);
+	context->device.actual_clock_rate = context->device.max_clock_rate;
+
+	/* I/O */
+	context->mem = request_mem_region(context->mem->start,
+					  RESSIZE(context->mem), context->description);
+
+	if (!context->mem) {
+		DBG_PRINT(SDDBG_ERROR, ("Failed to request io memory region\n"));
+		status = -ENOENT;
+		goto out_disable_clock;
+	}
+
+	context->base = ioremap(context->mem->start, RESSIZE(context->mem));
+	if (context->base == 0) {
+		DBG_PRINT(SDDBG_ERROR, ("failed to ioremap() io memory region.\n"));
+		status = -EINVAL;
+		goto out_free_mem_region;
+	}
+
+	/* IRQ */
+#if 0
+	context->cd_irq = s3c2410_gpio_getirq(GTA02v1_GPIO_nSD_DETECT);
+	s3c2410_gpio_cfgpin(GTA02v1_GPIO_nSD_DETECT, S3C2410_GPIO_IRQ);
+
+	if (request_irq(context->cd_irq, s3c24xx_hcd_cd_irq, 0, context->description, context)) {
+		DBG_PRINT(SDDBG_ERROR, ("failed to request card detect interrupt.\n"));
+		status = -ENOENT;
+		goto out_unmap_mem_region;
+	}
+#endif
+
+	if (request_irq(context->io_irq, s3c24xx_hcd_irq, 0, context->description, context)) {
+		DBG_PRINT(SDDBG_ERROR, ("failed to request mci interrupt.\n"));
+		status = -ENOENT;
+		goto out_unmap_mem_region;
+	}
+
+
+	/* DMA */
+	context->io_buffer_size = 4 * 4096;
+	context->io_buffer = dma_alloc_writecombine(&context->pdev->dev,
+						    context->io_buffer_size,
+						    &context->io_buffer_dma,
+						    GFP_KERNEL | GFP_DMA);
+
+	if (context->io_buffer == NULL) {
+		DBG_PRINT(SDDBG_ERROR, ("failed to allocate DMA buffer\n"));
+		status = -ENOMEM;
+		goto out_free_irq;
+
+	}
+
+	if (s3c2410_dma_request(context->dma_channel, &s3c24xx_hcd_dma_client, NULL)) {
+		DBG_PRINT(SDDBG_ERROR, ("unable to get DMA channel.\n"));
+		status = -ENOENT;
+		goto out_free_dma;
+	}
+
+
+	/* Set multiplexing */
+	s3c2410_gpio_cfgpin(S3C2410_GPE5, S3C2410_GPE5_SDCLK);
+	s3c2410_gpio_cfgpin(S3C2410_GPE6, S3C2410_GPE6_SDCMD);
+	s3c2410_gpio_cfgpin(S3C2410_GPE7, S3C2410_GPE7_SDDAT0);
+	s3c2410_gpio_cfgpin(S3C2410_GPE8, S3C2410_GPE8_SDDAT1);
+	s3c2410_gpio_cfgpin(S3C2410_GPE9, S3C2410_GPE9_SDDAT2);
+	s3c2410_gpio_cfgpin(S3C2410_GPE10, S3C2410_GPE10_SDDAT3);
+
+	con = readl(context->base + S3C2410_SDICON);
+	con |= S3C2410_SDICON_SDIOIRQ;
+	writel(con, context->base + S3C2410_SDICON);
+
+	datacon = readl(context->base + S3C2410_SDIDCON);
+	datacon |= S3C2410_SDIDCON_WIDEBUS;
+	writel(datacon, context->base + S3C2410_SDIDCON);
+
+	printk("S3c24xx SDIO: IRQ:%d Detect IRQ:%d DMA channel:%d base@0x%p PCLK@%ld kHz\n",
+	       context->io_irq, context->cd_irq, context->dma_channel, context->base,
+	       context->device.max_clock_rate/1000);
+
+	return SDIOErrorToOSError(status);
+
+ out_free_dma:
+	dma_free_writecombine(&context->pdev->dev,context->io_buffer_size,
+			      context->io_buffer, context->io_buffer_dma);
+
+ out_free_irq:
+	free_irq(context->io_irq, context);
+
+ out_unmap_mem_region:
+	iounmap(context->base);
+
+ out_free_mem_region:
+	release_mem_region(context->mem->start, RESSIZE(context->mem));
+
+ out_disable_clock:
+	clk_disable(context->device.clock);
+
+	return SDIOErrorToOSError(status);
+}
+
+static void s3c24xx_hcd_hw_cleanup(struct s3c24xx_hcd_context * context)
+{
+	clk_disable(context->device.clock);
+	free_irq(context->io_irq, context);
+	iounmap(context->base);
+	release_mem_region(context->mem->start, RESSIZE(context->mem));
+	dma_free_writecombine(&context->pdev->dev,context->io_buffer_size,
+			      context->io_buffer, context->io_buffer_dma);
+}
+
+static int s3c24xx_hcd_pnp_probe(struct pnp_dev *pBusDevice, const struct pnp_device_id *pId)
+{
+	SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+
+	status = s3c24xx_hcd_hw_init(&hcd_context);
+	if (SDIO_IS_ERROR(status)) {
+		DBG_PRINT(SDDBG_ERROR, ("HW Init failed\n"));
+		return SDIOErrorToOSError(status);
+	}
+
+	status = SDIO_RegisterHostController(&hcd_context.hcd);
+	if (SDIO_IS_ERROR(status)) {
+		DBG_PRINT(SDDBG_ERROR, ("Host registration failed\n"));
+		s3c24xx_hcd_hw_cleanup(&hcd_context);
+		return SDIOErrorToOSError(status);
+	}
+
+	/* Our card is built-in, we force the attachement event */
+	SDIO_HandleHcdEvent(&hcd_context.hcd, EVENT_HCD_ATTACH);
+
+	return 0;
+}
+
+static void s3c24xx_hcd_pnp_remove(struct pnp_dev *pBusDevice)
+{
+}
+
+/* the driver context data */
+struct s3c24xx_hcd_context hcd_context = {
+	.description  = DESCRIPTION,
+	.hcd.pName = "sdio_s3c24xx",
+	.hcd.Version = CT_SDIO_STACK_VERSION_CODE,
+	.hcd.pModule = THIS_MODULE,
+	/* builtin card, 4 bits bus */
+	.hcd.Attributes = SDHCD_ATTRIB_BUS_4BIT | SDHCD_ATTRIB_BUS_1BIT | SDHCD_ATTRIB_MULTI_BLK_IRQ,
+	.hcd.SlotNumber = 0,
+	.hcd.MaxSlotCurrent = 500, /* 1/2 amp */
+	.hcd.SlotVoltageCaps = SLOT_POWER_3_3V, /* 3.3V */
+	.hcd.SlotVoltagePreferred = SLOT_POWER_3_3V, /* 3.3V */
+	.hcd.MaxClockRate = 25000000,
+	.hcd.MaxBytesPerBlock = 0xfff, /* 0 - 4095 */
+	.hcd.MaxBlocksPerTrans = 0xfff, /* 0 - 4095 */
+	.hcd.pContext = &hcd_context,
+	.hcd.pRequest = s3c24xx_hcd_request,
+	.hcd.pConfigure = s3c24xx_hcd_config,
+	.device.pnp_device.name = "sdio_s3c24xx_hcd",
+	.device.pnp_driver.name = "sdio_s3c24xx_hcd",
+	.device.pnp_driver.probe  = s3c24xx_hcd_pnp_probe,
+	.device.pnp_driver.remove = s3c24xx_hcd_pnp_remove,
+};
+
+static int s3c24xx_hcd_probe(struct platform_device * pdev)
+{
+	SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+	struct resource *r = NULL;
+
+	printk("S3c2440 SDIO Host controller\n");
+
+	hcd_context.pdev = pdev;
+
+	hcd_context.mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (hcd_context.mem == NULL) {
+		DBG_PRINT(SDDBG_ERROR, ("No memory region\n"));
+		status = SDIO_STATUS_NO_RESOURCES;
+		goto out;
+	}
+
+	hcd_context.io_irq = platform_get_irq(pdev, 0);
+	if (hcd_context.io_irq == 0) {
+		DBG_PRINT(SDDBG_ERROR, ("No IRQ\n"));
+		status = SDIO_STATUS_NO_RESOURCES;
+		goto out;
+	}
+
+	r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+	if (r == NULL) {
+		DBG_PRINT(SDDBG_ERROR, ("No DMA channel\n"));
+		status = SDIO_STATUS_NO_RESOURCES;
+		goto out;
+	}
+	hcd_context.dma_channel = r->start;
+	hcd_context.dma_en = 0;
+
+	hcd_context.int_sdio = 0;
+
+	spin_lock_init(&hcd_context.lock);
+
+	init_completion(&hcd_context.dma_complete);
+	init_completion(&hcd_context.xfer_complete);
+
+	INIT_WORK(&hcd_context.io_work, s3c24xx_hcd_io_work);
+	INIT_WORK(&hcd_context.irq_work, s3c24xx_hcd_irq_work);
+
+	mdelay(100);
+
+	status = SDIO_BusAddOSDevice(&hcd_context.device.dma,
+				     &hcd_context.device.pnp_driver,
+				     &hcd_context.device.pnp_device);
+
+ out:
+
+	return SDIOErrorToOSError(status);
+}
+
+/*
+ * module cleanup
+ */
+static int s3c24xx_hcd_remove(struct platform_device * pdev) {
+	printk("S3C2440 SDIO host controller unloaded\n");
+	SDIO_BusRemoveOSDevice(&hcd_context.device.pnp_driver, &hcd_context.device.pnp_device);
+
+	return 0;
+}
+
+static struct platform_driver s3c24xx_hcd_sdio =
+{
+	.driver.name	= "s3c24xx-sdio",
+	.probe		= s3c24xx_hcd_probe,
+	.remove		= s3c24xx_hcd_remove,
+};
+
+#ifdef CONFIG_DEBUG_FS
+static struct dentry *debugfs_dir;
+
+static int s3c24xx_hcd_debugfs_show(struct seq_file *s, void *data)
+{
+	PSDREQUEST req;
+	u32 con, pre, cmdarg, cmdcon, cmdsta, r0, r1, r2, r3, timer, bsize;
+	u32 datcon, datcnt, datsta, fsta, imask;
+	struct s3c24xx_hcd_context * context = &hcd_context;
+
+
+	con 	= readl(context->base + S3C2410_SDICON);
+	pre 	= readl(context->base + S3C2410_SDIPRE);
+	cmdarg 	= readl(context->base + S3C2410_SDICMDARG);
+	cmdcon 	= readl(context->base + S3C2410_SDICMDCON);
+	cmdsta 	= readl(context->base + S3C2410_SDICMDSTAT);
+	r0 	= readl(context->base + S3C2410_SDIRSP0);
+	r1 	= readl(context->base + S3C2410_SDIRSP1);
+	r2 	= readl(context->base + S3C2410_SDIRSP2);
+	r3 	= readl(context->base + S3C2410_SDIRSP3);
+	timer 	= readl(context->base + S3C2410_SDITIMER);
+	bsize 	= readl(context->base + S3C2410_SDIBSIZE);
+	datcon 	= readl(context->base + S3C2410_SDIDCON);
+	datcnt 	= readl(context->base + S3C2410_SDIDCNT);
+	datsta 	= readl(context->base + S3C2410_SDIDSTA);
+	fsta 	= readl(context->base + S3C2410_SDIFSTA);
+	imask   = readl(context->base + S3C2440_SDIIMSK);
+
+	seq_printf(s, "SDICON:    0x%08x\n", con);
+	seq_printf(s, "SDIPRE:    0x%08x\n", pre);
+	seq_printf(s, "SDICmdArg: 0x%08x\n", cmdarg);
+	seq_printf(s, "SDICmdCon: 0x%08x\n", cmdcon);
+	seq_printf(s, "SDICmdSta: 0x%08x\n", cmdsta);
+	seq_printf(s, "SDIRSP0:   0x%08x\n", r0);
+	seq_printf(s, "SDIRSP1:   0x%08x\n", r1);
+	seq_printf(s, "SDIRSP2:   0x%08x\n", r2);
+	seq_printf(s, "SDIRSP3:   0x%08x\n", r3);
+	seq_printf(s, "SDIDTimer: 0x%08x\n", timer);
+	seq_printf(s, "SDIBSize:  0x%08x\n", bsize);
+	seq_printf(s, "SDIDatCon: 0x%08x\n", datcon);
+	seq_printf(s, "SDIDatCnt: 0x%08x\n", datcnt);
+	seq_printf(s, "SDIDatSta: 0x%08x\n", datsta);
+	seq_printf(s, "SDIFSta:   0x%08x\n", fsta);
+	seq_printf(s, "SDIIntMsk: 0x%08x\n", imask);
+	seq_printf(s, "\n");
+
+	seq_printf(s, "Current REQ: \n");
+	req = GET_CURRENT_REQUEST(&context->hcd);
+	if (req == NULL) {
+		seq_printf(s, " No current request\n");
+	} else {
+		seq_printf(s, " Command: %d\n", req->Command);
+		seq_printf(s, " Args: 0x%x\n", req->Argument);
+		seq_printf(s, " Flags: 0x%x\n", req->Flags);
+		seq_printf(s, " %d blocks x %d bytes\n", req->BlockCount, req->BlockLen);
+		seq_printf(s, " %d bytes remaining\n", req->DataRemaining);
+	}
+
+	seq_printf(s, "Context: \n");
+	seq_printf(s, " INT mask: 0x%x\n", context->int_mask);
+	seq_printf(s, " sdio INT: %d\n", context->int_sdio);
+	seq_printf(s, " cmdsta: 0x%x\n", context->cmdsta);
+	seq_printf(s, " dsta: 0x%x\n", context->dsta);
+	seq_printf(s, " fsta: 0x%x\n", context->fsta);
+
+	return 0;
+}
+
+static int s3c24xx_hcd_debugfs_open(struct inode *inode,
+					struct file *file)
+{
+	return single_open(file, s3c24xx_hcd_debugfs_show, NULL);
+}
+
+static const struct file_operations s3c24xx_hcd_debugfs_fops = {
+	.open		= s3c24xx_hcd_debugfs_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.owner		= THIS_MODULE,
+};
+
+
+static int s3c24xx_debugfs_init(struct s3c24xx_hcd_context * context)
+{
+	debugfs_dir = debugfs_create_dir("s3c24xx_sdio", NULL);
+
+	debugfs_create_file("registers", 0444, debugfs_dir,
+			    (void *)context,
+			    &s3c24xx_hcd_debugfs_fops);
+
+	return 0;
+}
+
+#else
+
+static int s3c24xx_debugfs_init(struct s3c24xx_hcd_context * context)
+{
+	return 0;
+}
+
+#endif
+
+static int __init s3c24xx_hcd_init(void)
+{
+	int ret;
+
+	ret = s3c24xx_debugfs_init(&hcd_context);
+	if (ret) {
+		printk("%s(): debugfs init failed\n", __FUNCTION__);
+	}
+
+	platform_driver_register(&s3c24xx_hcd_sdio);
+
+	return 0;
+}
+
+static void __exit s3c24xx_hcd_exit(void)
+{
+	platform_driver_unregister(&s3c24xx_hcd_sdio);
+}
+
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DESCRIPTION);
+MODULE_AUTHOR(AUTHOR);
+
+module_init(s3c24xx_hcd_init);
+module_exit(s3c24xx_hcd_exit);
diff --git a/drivers/sdio/hcd/s3c24xx/s3c24xx_hcd.h b/drivers/sdio/hcd/s3c24xx/s3c24xx_hcd.h
new file mode 100644
index 0000000..eb262fc
--- /dev/null
+++ b/drivers/sdio/hcd/s3c24xx/s3c24xx_hcd.h
@@ -0,0 +1,67 @@
+#ifndef __SDIO_S3C24XX_HCD_H___
+#define __SDIO_S3C24XX_HCD_H___
+
+#define S3C24XX_HCD_NO_RESPONSE     1
+#define S3C24XX_HCD_RESPONSE_SHORT  2
+#define S3C24XX_HCD_RESPONSE_LONG   3
+#define S3C24XX_HCD_DATA_READ       4
+#define S3C24XX_HCD_DATA_WRITE      5
+
+struct s3c24xx_hcd_device {
+	OS_PNPDEVICE   pnp_device;     /* the OS device for this HCD */
+	OS_PNPDRIVER   pnp_driver;     /* the OS driver for this HCD */
+	SDDMA_DESCRIPTION dma;
+	struct clk * clock;
+	unsigned long max_clock_rate;
+	unsigned long actual_clock_rate;
+};
+
+
+/* driver wide data, this driver only supports one device,
+ * so we include the per device data here also */
+struct s3c24xx_hcd_context {
+	PTEXT			  description;       /* human readable device decsription */
+	SDHCD			  hcd;                /* HCD description for bus driver */
+	struct s3c24xx_hcd_device device;             /* the single device's info */
+	struct platform_device    *pdev;
+	struct resource           *mem;
+	void __iomem		  *base;
+	UINT32                    io_irq;
+	UINT32                    cd_irq;
+	BOOL			  card_inserted;       /* card inserted flag */
+	BOOL			  cmd_processed;       /* command phase was processed */
+	UINT32			  fifo_depth;          /* FIFO depth for the bus mode */
+	BOOL			  irq_masked;
+	UINT32		  	  bus_width;
+	UINT32		  	  data_size;           /* Word, half word, or byte */
+	UINT32		  	  latest_xfer_size;
+
+	void                      *io_buffer;         /* Kernel address */
+	dma_addr_t                io_buffer_dma;      /* Bus address */
+	UINT32                    io_buffer_size;
+	UINT32                    dma_channel;
+	UINT32                    dma_en;
+	struct completion         dma_complete;
+	struct completion         xfer_complete;
+
+	UINT32		  	  int_mask;
+	UINT32		  	  int_sdio;            /* Do we have SDIO interrupt on ? */
+
+	UINT32		  	  complete;
+
+	UINT32		  	  cmdsta;
+	UINT32		  	  dsta;
+	UINT32		  	  fsta;
+
+	spinlock_t		  lock;
+
+	struct work_struct        io_work;
+	struct work_struct        irq_work;
+};
+
+SDIO_STATUS s3c24xx_hcd_config(PSDHCD hcd, PSDCONFIG config);
+SDIO_STATUS s3c24xx_hcd_request(PSDHCD hcd);
+
+struct s3c24xx_hcd_context hcd_context;
+
+#endif
-- 
1.5.6.5