mmc: remove s3cmci driver

The s3c24xx platform is gone, so this driver can be removed as well.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

4 files changed, 0 insertions, 1896 deletions

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 1be2884b22fe..f0456ad4b597 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -628,49 +628,6 @@ config MMC_SPI
 
 	  If unsure, or if your system has no SPI master driver, say N.
 
-config MMC_S3C
-	tristate "Samsung S3C SD/MMC Card Interface support"
-	depends on ARCH_S3C24XX || COMPILE_TEST
-	depends on S3C24XX_DMAC || COMPILE_TEST
-	help
-	  This selects a driver for the MCI interface found in
-	  Samsung's S3C2410, S3C2412, S3C2440, S3C2442 CPUs.
-	  If you have a board based on one of those and a MMC/SD
-	  slot, say Y or M here.
-
-	  If unsure, say N.
-
-config MMC_S3C_HW_SDIO_IRQ
-	bool "Hardware support for SDIO IRQ"
-	depends on MMC_S3C
-	help
-	  Enable the hardware support for SDIO interrupts instead of using
-	  the generic polling code.
-
-choice
-	prompt "Samsung S3C SD/MMC transfer code"
-	depends on MMC_S3C
-
-config MMC_S3C_PIO
-	bool "Use PIO transfers only"
-	help
-	  Use PIO to transfer data between memory and the hardware.
-
-	  PIO is slower than DMA as it requires CPU instructions to
-	  move the data. This has been the traditional default for
-	  the S3C MCI driver.
-
-config MMC_S3C_DMA
-	bool "Use DMA transfers only"
-	help
-	  Use DMA to transfer data between memory and the hardware.
-
-	  Currently, the DMA support in this driver seems to not be
-	  working properly and needs to be debugged before this
-	  option is useful.
-
-endchoice
-
 config MMC_SDRICOH_CS
 	tristate "MMC/SD driver for Ricoh Bay1Controllers"
 	depends on PCI && PCMCIA
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 76bbde01ed73..063d87764966 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -34,7 +34,6 @@ obj-$(CONFIG_MMC_MVSDIO)	+= mvsdio.o
 obj-$(CONFIG_MMC_DAVINCI)       += davinci_mmc.o
 obj-$(CONFIG_MMC_SPI)		+= mmc_spi.o
 obj-$(CONFIG_MMC_SPI)		+= of_mmc_spi.o
-obj-$(CONFIG_MMC_S3C)   	+= s3cmci.o
 obj-$(CONFIG_MMC_SDRICOH_CS)	+= sdricoh_cs.o
 obj-$(CONFIG_MMC_TMIO)		+= tmio_mmc.o
 obj-$(CONFIG_MMC_TMIO_CORE)	+= tmio_mmc_core.o
diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
deleted file mode 100644
index 8d5929a32d34..000000000000
--- a/drivers/mmc/host/s3cmci.c
+++ /dev/null
@@ -1,1777 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- *  linux/drivers/mmc/s3cmci.h - Samsung S3C MCI driver
- *
- *  Copyright (C) 2004-2006 maintech GmbH, Thomas Kleffel <tk@maintech.de>
- *
- * Current driver maintained by Ben Dooks and Simtec Electronics
- *  Copyright (C) 2008 Simtec Electronics <ben-linux@fluff.org>
- */
-
-#include <linux/module.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-mapping.h>
-#include <linux/clk.h>
-#include <linux/mmc/host.h>
-#include <linux/platform_device.h>
-#include <linux/cpufreq.h>
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-#include <linux/gpio/consumer.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/mmc/slot-gpio.h>
-#include <linux/platform_data/mmc-s3cmci.h>
-
-#include "s3cmci.h"
-
-#define DRIVER_NAME "s3c-mci"
-
-#define S3C2410_SDICON			(0x00)
-#define S3C2410_SDIPRE			(0x04)
-#define S3C2410_SDICMDARG		(0x08)
-#define S3C2410_SDICMDCON		(0x0C)
-#define S3C2410_SDICMDSTAT		(0x10)
-#define S3C2410_SDIRSP0			(0x14)
-#define S3C2410_SDIRSP1			(0x18)
-#define S3C2410_SDIRSP2			(0x1C)
-#define S3C2410_SDIRSP3			(0x20)
-#define S3C2410_SDITIMER		(0x24)
-#define S3C2410_SDIBSIZE		(0x28)
-#define S3C2410_SDIDCON			(0x2C)
-#define S3C2410_SDIDCNT			(0x30)
-#define S3C2410_SDIDSTA			(0x34)
-#define S3C2410_SDIFSTA			(0x38)
-
-#define S3C2410_SDIDATA			(0x3C)
-#define S3C2410_SDIIMSK			(0x40)
-
-#define S3C2440_SDIDATA			(0x40)
-#define S3C2440_SDIIMSK			(0x3C)
-
-#define S3C2440_SDICON_SDRESET		(1 << 8)
-#define S3C2410_SDICON_SDIOIRQ		(1 << 3)
-#define S3C2410_SDICON_FIFORESET	(1 << 1)
-#define S3C2410_SDICON_CLOCKTYPE	(1 << 0)
-
-#define S3C2410_SDICMDCON_LONGRSP	(1 << 10)
-#define S3C2410_SDICMDCON_WAITRSP	(1 << 9)
-#define S3C2410_SDICMDCON_CMDSTART	(1 << 8)
-#define S3C2410_SDICMDCON_SENDERHOST	(1 << 6)
-#define S3C2410_SDICMDCON_INDEX		(0x3f)
-
-#define S3C2410_SDICMDSTAT_CRCFAIL	(1 << 12)
-#define S3C2410_SDICMDSTAT_CMDSENT	(1 << 11)
-#define S3C2410_SDICMDSTAT_CMDTIMEOUT	(1 << 10)
-#define S3C2410_SDICMDSTAT_RSPFIN	(1 << 9)
-
-#define S3C2440_SDIDCON_DS_WORD		(2 << 22)
-#define S3C2410_SDIDCON_TXAFTERRESP	(1 << 20)
-#define S3C2410_SDIDCON_RXAFTERCMD	(1 << 19)
-#define S3C2410_SDIDCON_BLOCKMODE	(1 << 17)
-#define S3C2410_SDIDCON_WIDEBUS		(1 << 16)
-#define S3C2410_SDIDCON_DMAEN		(1 << 15)
-#define S3C2410_SDIDCON_STOP		(1 << 14)
-#define S3C2440_SDIDCON_DATSTART	(1 << 14)
-
-#define S3C2410_SDIDCON_XFER_RXSTART	(2 << 12)
-#define S3C2410_SDIDCON_XFER_TXSTART	(3 << 12)
-
-#define S3C2410_SDIDCON_BLKNUM_MASK	(0xFFF)
-
-#define S3C2410_SDIDSTA_SDIOIRQDETECT	(1 << 9)
-#define S3C2410_SDIDSTA_FIFOFAIL	(1 << 8)
-#define S3C2410_SDIDSTA_CRCFAIL		(1 << 7)
-#define S3C2410_SDIDSTA_RXCRCFAIL	(1 << 6)
-#define S3C2410_SDIDSTA_DATATIMEOUT	(1 << 5)
-#define S3C2410_SDIDSTA_XFERFINISH	(1 << 4)
-#define S3C2410_SDIDSTA_TXDATAON	(1 << 1)
-#define S3C2410_SDIDSTA_RXDATAON	(1 << 0)
-
-#define S3C2440_SDIFSTA_FIFORESET	(1 << 16)
-#define S3C2440_SDIFSTA_FIFOFAIL	(3 << 14)
-#define S3C2410_SDIFSTA_TFDET		(1 << 13)
-#define S3C2410_SDIFSTA_RFDET		(1 << 12)
-#define S3C2410_SDIFSTA_COUNTMASK	(0x7f)
-
-#define S3C2410_SDIIMSK_RESPONSECRC	(1 << 17)
-#define S3C2410_SDIIMSK_CMDSENT		(1 << 16)
-#define S3C2410_SDIIMSK_CMDTIMEOUT	(1 << 15)
-#define S3C2410_SDIIMSK_RESPONSEND	(1 << 14)
-#define S3C2410_SDIIMSK_SDIOIRQ		(1 << 12)
-#define S3C2410_SDIIMSK_FIFOFAIL	(1 << 11)
-#define S3C2410_SDIIMSK_CRCSTATUS	(1 << 10)
-#define S3C2410_SDIIMSK_DATACRC		(1 << 9)
-#define S3C2410_SDIIMSK_DATATIMEOUT	(1 << 8)
-#define S3C2410_SDIIMSK_DATAFINISH	(1 << 7)
-#define S3C2410_SDIIMSK_TXFIFOHALF	(1 << 4)
-#define S3C2410_SDIIMSK_RXFIFOLAST	(1 << 2)
-#define S3C2410_SDIIMSK_RXFIFOHALF	(1 << 0)
-
-enum dbg_channels {
-	dbg_err   = (1 << 0),
-	dbg_debug = (1 << 1),
-	dbg_info  = (1 << 2),
-	dbg_irq   = (1 << 3),
-	dbg_sg    = (1 << 4),
-	dbg_dma   = (1 << 5),
-	dbg_pio   = (1 << 6),
-	dbg_fail  = (1 << 7),
-	dbg_conf  = (1 << 8),
-};
-
-static const int dbgmap_err   = dbg_fail;
-static const int dbgmap_info  = dbg_info | dbg_conf;
-static const int dbgmap_debug = dbg_err | dbg_debug;
-
-#define dbg(host, channels, args...)		  \
-	do {					  \
-	if (dbgmap_err & channels) 		  \
-		dev_err(&host->pdev->dev, args);  \
-	else if (dbgmap_info & channels)	  \
-		dev_info(&host->pdev->dev, args); \
-	else if (dbgmap_debug & channels)	  \
-		dev_dbg(&host->pdev->dev, args);  \
-	} while (0)
-
-static void finalize_request(struct s3cmci_host *host);
-static void s3cmci_send_request(struct mmc_host *mmc);
-static void s3cmci_reset(struct s3cmci_host *host);
-
-#ifdef CONFIG_MMC_DEBUG
-
-static void dbg_dumpregs(struct s3cmci_host *host, char *prefix)
-{
-	u32 con, pre, cmdarg, cmdcon, cmdsta, r0, r1, r2, r3, timer;
-	u32 datcon, datcnt, datsta, fsta;
-
-	con 	= readl(host->base + S3C2410_SDICON);
-	pre 	= readl(host->base + S3C2410_SDIPRE);
-	cmdarg 	= readl(host->base + S3C2410_SDICMDARG);
-	cmdcon 	= readl(host->base + S3C2410_SDICMDCON);
-	cmdsta 	= readl(host->base + S3C2410_SDICMDSTAT);
-	r0 	= readl(host->base + S3C2410_SDIRSP0);
-	r1 	= readl(host->base + S3C2410_SDIRSP1);
-	r2 	= readl(host->base + S3C2410_SDIRSP2);
-	r3 	= readl(host->base + S3C2410_SDIRSP3);
-	timer 	= readl(host->base + S3C2410_SDITIMER);
-	datcon 	= readl(host->base + S3C2410_SDIDCON);
-	datcnt 	= readl(host->base + S3C2410_SDIDCNT);
-	datsta 	= readl(host->base + S3C2410_SDIDSTA);
-	fsta 	= readl(host->base + S3C2410_SDIFSTA);
-
-	dbg(host, dbg_debug, "%s  CON:[%08x]  PRE:[%08x]  TMR:[%08x]\n",
-				prefix, con, pre, timer);
-
-	dbg(host, dbg_debug, "%s CCON:[%08x] CARG:[%08x] CSTA:[%08x]\n",
-				prefix, cmdcon, cmdarg, cmdsta);
-
-	dbg(host, dbg_debug, "%s DCON:[%08x] FSTA:[%08x]"
-			       " DSTA:[%08x] DCNT:[%08x]\n",
-				prefix, datcon, fsta, datsta, datcnt);
-
-	dbg(host, dbg_debug, "%s   R0:[%08x]   R1:[%08x]"
-			       "   R2:[%08x]   R3:[%08x]\n",
-				prefix, r0, r1, r2, r3);
-}
-
-static void prepare_dbgmsg(struct s3cmci_host *host, struct mmc_command *cmd,
-			   int stop)
-{
-	snprintf(host->dbgmsg_cmd, 300,
-		 "#%u%s op:%i arg:0x%08x flags:0x08%x retries:%u",
-		 host->ccnt, (stop ? " (STOP)" : ""),
-		 cmd->opcode, cmd->arg, cmd->flags, cmd->retries);
-
-	if (cmd->data) {
-		snprintf(host->dbgmsg_dat, 300,
-			 "#%u bsize:%u blocks:%u bytes:%u",
-			 host->dcnt, cmd->data->blksz,
-			 cmd->data->blocks,
-			 cmd->data->blocks * cmd->data->blksz);
-	} else {
-		host->dbgmsg_dat[0] = '\0';
-	}
-}
-
-static void dbg_dumpcmd(struct s3cmci_host *host, struct mmc_command *cmd,
-			int fail)
-{
-	unsigned int dbglvl = fail ? dbg_fail : dbg_debug;
-
-	if (!cmd)
-		return;
-
-	if (cmd->error == 0) {
-		dbg(host, dbglvl, "CMD[OK] %s R0:0x%08x\n",
-			host->dbgmsg_cmd, cmd->resp[0]);
-	} else {
-		dbg(host, dbglvl, "CMD[ERR %i] %s Status:%s\n",
-			cmd->error, host->dbgmsg_cmd, host->status);
-	}
-
-	if (!cmd->data)
-		return;
-
-	if (cmd->data->error == 0) {
-		dbg(host, dbglvl, "DAT[OK] %s\n", host->dbgmsg_dat);
-	} else {
-		dbg(host, dbglvl, "DAT[ERR %i] %s DCNT:0x%08x\n",
-			cmd->data->error, host->dbgmsg_dat,
-			readl(host->base + S3C2410_SDIDCNT));
-	}
-}
-#else
-static void dbg_dumpcmd(struct s3cmci_host *host,
-			struct mmc_command *cmd, int fail) { }
-
-static void prepare_dbgmsg(struct s3cmci_host *host, struct mmc_command *cmd,
-			   int stop) { }
-
-static void dbg_dumpregs(struct s3cmci_host *host, char *prefix) { }
-
-#endif /* CONFIG_MMC_DEBUG */
-
-/**
- * s3cmci_host_usedma - return whether the host is using dma or pio
- * @host: The host state
- *
- * Return true if the host is using DMA to transfer data, else false
- * to use PIO mode. Will return static data depending on the driver
- * configuration.
- */
-static inline bool s3cmci_host_usedma(struct s3cmci_host *host)
-{
-#ifdef CONFIG_MMC_S3C_PIO
-	return false;
-#else /* CONFIG_MMC_S3C_DMA */
-	return true;
-#endif
-}
-
-static inline u32 enable_imask(struct s3cmci_host *host, u32 imask)
-{
-	u32 newmask;
-
-	newmask = readl(host->base + host->sdiimsk);
-	newmask |= imask;
-
-	writel(newmask, host->base + host->sdiimsk);
-
-	return newmask;
-}
-
-static inline u32 disable_imask(struct s3cmci_host *host, u32 imask)
-{
-	u32 newmask;
-
-	newmask = readl(host->base + host->sdiimsk);
-	newmask &= ~imask;
-
-	writel(newmask, host->base + host->sdiimsk);
-
-	return newmask;
-}
-
-static inline void clear_imask(struct s3cmci_host *host)
-{
-	u32 mask = readl(host->base + host->sdiimsk);
-
-	/* preserve the SDIO IRQ mask state */
-	mask &= S3C2410_SDIIMSK_SDIOIRQ;
-	writel(mask, host->base + host->sdiimsk);
-}
-
-/**
- * s3cmci_check_sdio_irq - test whether the SDIO IRQ is being signalled
- * @host: The host to check.
- *
- * Test to see if the SDIO interrupt is being signalled in case the
- * controller has failed to re-detect a card interrupt. Read GPE8 and
- * see if it is low and if so, signal a SDIO interrupt.
- *
- * This is currently called if a request is finished (we assume that the
- * bus is now idle) and when the SDIO IRQ is enabled in case the IRQ is
- * already being indicated.
-*/
-static void s3cmci_check_sdio_irq(struct s3cmci_host *host)
-{
-	if (host->sdio_irqen) {
-		if (host->pdata->bus[3] &&
-		    gpiod_get_value(host->pdata->bus[3]) == 0) {
-			pr_debug("%s: signalling irq\n", __func__);
-			mmc_signal_sdio_irq(host->mmc);
-		}
-	}
-}
-
-static inline int get_data_buffer(struct s3cmci_host *host,
-				  u32 *bytes, u32 **pointer)
-{
-	struct scatterlist *sg;
-
-	if (host->pio_active == XFER_NONE)
-		return -EINVAL;
-
-	if ((!host->mrq) || (!host->mrq->data))
-		return -EINVAL;
-
-	if (host->pio_sgptr >= host->mrq->data->sg_len) {
-		dbg(host, dbg_debug, "no more buffers (%i/%i)\n",
-		      host->pio_sgptr, host->mrq->data->sg_len);
-		return -EBUSY;
-	}
-	sg = &host->mrq->data->sg[host->pio_sgptr];
-
-	*bytes = sg->length;
-	*pointer = sg_virt(sg);
-
-	host->pio_sgptr++;
-
-	dbg(host, dbg_sg, "new buffer (%i/%i)\n",
-	    host->pio_sgptr, host->mrq->data->sg_len);
-
-	return 0;
-}
-
-static inline u32 fifo_count(struct s3cmci_host *host)
-{
-	u32 fifostat = readl(host->base + S3C2410_SDIFSTA);
-
-	fifostat &= S3C2410_SDIFSTA_COUNTMASK;
-	return fifostat;
-}
-
-static inline u32 fifo_free(struct s3cmci_host *host)
-{
-	u32 fifostat = readl(host->base + S3C2410_SDIFSTA);
-
-	fifostat &= S3C2410_SDIFSTA_COUNTMASK;
-	return 63 - fifostat;
-}
-
-/**
- * s3cmci_enable_irq - enable IRQ, after having disabled it.
- * @host: The device state.
- * @more: True if more IRQs are expected from transfer.
- *
- * Enable the main IRQ if needed after it has been disabled.
- *
- * The IRQ can be one of the following states:
- *	- disabled during IDLE
- *	- disabled whilst processing data
- *	- enabled during transfer
- *	- enabled whilst awaiting SDIO interrupt detection
- */
-static void s3cmci_enable_irq(struct s3cmci_host *host, bool more)
-{
-	unsigned long flags;
-	bool enable = false;
-
-	local_irq_save(flags);
-
-	host->irq_enabled = more;
-	host->irq_disabled = false;
-
-	enable = more | host->sdio_irqen;
-
-	if (host->irq_state != enable) {
-		host->irq_state = enable;
-
-		if (enable)
-			enable_irq(host->irq);
-		else
-			disable_irq(host->irq);
-	}
-
-	local_irq_restore(flags);
-}
-
-static void s3cmci_disable_irq(struct s3cmci_host *host, bool transfer)
-{
-	unsigned long flags;
-
-	local_irq_save(flags);
-
-	/* pr_debug("%s: transfer %d\n", __func__, transfer); */
-
-	host->irq_disabled = transfer;
-
-	if (transfer && host->irq_state) {
-		host->irq_state = false;
-		disable_irq(host->irq);
-	}
-
-	local_irq_restore(flags);
-}
-
-static void do_pio_read(struct s3cmci_host *host)
-{
-	int res;
-	u32 fifo;
-	u32 *ptr;
-	u32 fifo_words;
-	void __iomem *from_ptr;
-
-	/* write real prescaler to host, it might be set slow to fix */
-	writel(host->prescaler, host->base + S3C2410_SDIPRE);
-
-	from_ptr = host->base + host->sdidata;
-
-	while ((fifo = fifo_count(host))) {
-		if (!host->pio_bytes) {
-			res = get_data_buffer(host, &host->pio_bytes,
-					      &host->pio_ptr);
-			if (res) {
-				host->pio_active = XFER_NONE;
-				host->complete_what = COMPLETION_FINALIZE;
-
-				dbg(host, dbg_pio, "pio_read(): "
-				    "complete (no more data).\n");
-				return;
-			}
-
-			dbg(host, dbg_pio,
-			    "pio_read(): new target: [%i]@[%p]\n",
-			    host->pio_bytes, host->pio_ptr);
-		}
-
-		dbg(host, dbg_pio,
-		    "pio_read(): fifo:[%02i] buffer:[%03i] dcnt:[%08X]\n",
-		    fifo, host->pio_bytes,
-		    readl(host->base + S3C2410_SDIDCNT));
-
-		/* If we have reached the end of the block, we can
-		 * read a word and get 1 to 3 bytes.  If we in the
-		 * middle of the block, we have to read full words,
-		 * otherwise we will write garbage, so round down to
-		 * an even multiple of 4. */
-		if (fifo >= host->pio_bytes)
-			fifo = host->pio_bytes;
-		else
-			fifo -= fifo & 3;
-
-		host->pio_bytes -= fifo;
-		host->pio_count += fifo;
-
-		fifo_words = fifo >> 2;
-		ptr = host->pio_ptr;
-		while (fifo_words--)
-			*ptr++ = readl(from_ptr);
-		host->pio_ptr = ptr;
-
-		if (fifo & 3) {
-			u32 n = fifo & 3;
-			u32 data = readl(from_ptr);
-			u8 *p = (u8 *)host->pio_ptr;
-
-			while (n--) {
-				*p++ = data;
-				data >>= 8;
-			}
-		}
-	}
-
-	if (!host->pio_bytes) {
-		res = get_data_buffer(host, &host->pio_bytes, &host->pio_ptr);
-		if (res) {
-			dbg(host, dbg_pio,
-			    "pio_read(): complete (no more buffers).\n");
-			host->pio_active = XFER_NONE;
-			host->complete_what = COMPLETION_FINALIZE;
-
-			return;
-		}
-	}
-
-	enable_imask(host,
-		     S3C2410_SDIIMSK_RXFIFOHALF | S3C2410_SDIIMSK_RXFIFOLAST);
-}
-
-static void do_pio_write(struct s3cmci_host *host)
-{
-	void __iomem *to_ptr;
-	int res;
-	u32 fifo;
-	u32 *ptr;
-
-	to_ptr = host->base + host->sdidata;
-
-	while ((fifo = fifo_free(host)) > 3) {
-		if (!host->pio_bytes) {
-			res = get_data_buffer(host, &host->pio_bytes,
-							&host->pio_ptr);
-			if (res) {
-				dbg(host, dbg_pio,
-				    "pio_write(): complete (no more data).\n");
-				host->pio_active = XFER_NONE;
-
-				return;
-			}
-
-			dbg(host, dbg_pio,
-			    "pio_write(): new source: [%i]@[%p]\n",
-			    host->pio_bytes, host->pio_ptr);
-
-		}
-
-		/* If we have reached the end of the block, we have to
-		 * write exactly the remaining number of bytes.  If we
-		 * in the middle of the block, we have to write full
-		 * words, so round down to an even multiple of 4. */
-		if (fifo >= host->pio_bytes)
-			fifo = host->pio_bytes;
-		else
-			fifo -= fifo & 3;
-
-		host->pio_bytes -= fifo;
-		host->pio_count += fifo;
-
-		fifo = (fifo + 3) >> 2;
-		ptr = host->pio_ptr;
-		while (fifo--)
-			writel(*ptr++, to_ptr);
-		host->pio_ptr = ptr;
-	}
-
-	enable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF);
-}
-
-static void pio_tasklet(struct tasklet_struct *t)
-{
-	struct s3cmci_host *host = from_tasklet(host, t, pio_tasklet);
-
-	s3cmci_disable_irq(host, true);
-
-	if (host->pio_active == XFER_WRITE)
-		do_pio_write(host);
-
-	if (host->pio_active == XFER_READ)
-		do_pio_read(host);
-
-	if (host->complete_what == COMPLETION_FINALIZE) {
-		clear_imask(host);
-		if (host->pio_active != XFER_NONE) {
-			dbg(host, dbg_err, "unfinished %s "
-			    "- pio_count:[%u] pio_bytes:[%u]\n",
-			    (host->pio_active == XFER_READ) ? "read" : "write",
-			    host->pio_count, host->pio_bytes);
-
-			if (host->mrq->data)
-				host->mrq->data->error = -EINVAL;
-		}
-
-		s3cmci_enable_irq(host, false);
-		finalize_request(host);
-	} else
-		s3cmci_enable_irq(host, true);
-}
-
-/*
- * ISR for SDI Interface IRQ
- * Communication between driver and ISR works as follows:
- *   host->mrq 			points to current request
- *   host->complete_what	Indicates when the request is considered done
- *     COMPLETION_CMDSENT	  when the command was sent
- *     COMPLETION_RSPFIN          when a response was received
- *     COMPLETION_XFERFINISH	  when the data transfer is finished
- *     COMPLETION_XFERFINISH_RSPFIN both of the above.
- *   host->complete_request	is the completion-object the driver waits for
- *
- * 1) Driver sets up host->mrq and host->complete_what
- * 2) Driver prepares the transfer
- * 3) Driver enables interrupts
- * 4) Driver starts transfer
- * 5) Driver waits for host->complete_rquest
- * 6) ISR checks for request status (errors and success)
- * 6) ISR sets host->mrq->cmd->error and host->mrq->data->error
- * 7) ISR completes host->complete_request
- * 8) ISR disables interrupts
- * 9) Driver wakes up and takes care of the request
- *
- * Note: "->error"-fields are expected to be set to 0 before the request
- *       was issued by mmc.c - therefore they are only set, when an error
- *       contition comes up
- */
-
-static irqreturn_t s3cmci_irq(int irq, void *dev_id)
-{
-	struct s3cmci_host *host = dev_id;
-	struct mmc_command *cmd;
-	u32 mci_csta, mci_dsta, mci_fsta, mci_dcnt, mci_imsk;
-	u32 mci_cclear = 0, mci_dclear;
-	unsigned long iflags;
-
-	mci_dsta = readl(host->base + S3C2410_SDIDSTA);
-	mci_imsk = readl(host->base + host->sdiimsk);
-
-	if (mci_dsta & S3C2410_SDIDSTA_SDIOIRQDETECT) {
-		if (mci_imsk & S3C2410_SDIIMSK_SDIOIRQ) {
-			mci_dclear = S3C2410_SDIDSTA_SDIOIRQDETECT;
-			writel(mci_dclear, host->base + S3C2410_SDIDSTA);
-
-			mmc_signal_sdio_irq(host->mmc);
-			return IRQ_HANDLED;
-		}
-	}
-
-	spin_lock_irqsave(&host->complete_lock, iflags);
-
-	mci_csta = readl(host->base + S3C2410_SDICMDSTAT);
-	mci_dcnt = readl(host->base + S3C2410_SDIDCNT);
-	mci_fsta = readl(host->base + S3C2410_SDIFSTA);
-	mci_dclear = 0;
-
-	if ((host->complete_what == COMPLETION_NONE) ||
-	    (host->complete_what == COMPLETION_FINALIZE)) {
-		host->status = "nothing to complete";
-		clear_imask(host);
-		goto irq_out;
-	}
-
-	if (!host->mrq) {
-		host->status = "no active mrq";
-		clear_imask(host);
-		goto irq_out;
-	}
-
-	cmd = host->cmd_is_stop ? host->mrq->stop : host->mrq->cmd;
-
-	if (!cmd) {
-		host->status = "no active cmd";
-		clear_imask(host);
-		goto irq_out;
-	}
-
-	if (!s3cmci_host_usedma(host)) {
-		if ((host->pio_active == XFER_WRITE) &&
-		    (mci_fsta & S3C2410_SDIFSTA_TFDET)) {
-
-			disable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF);
-			tasklet_schedule(&host->pio_tasklet);
-			host->status = "pio tx";
-		}
-
-		if ((host->pio_active == XFER_READ) &&
-		    (mci_fsta & S3C2410_SDIFSTA_RFDET)) {
-
-			disable_imask(host,
-				      S3C2410_SDIIMSK_RXFIFOHALF |
-				      S3C2410_SDIIMSK_RXFIFOLAST);
-
-			tasklet_schedule(&host->pio_tasklet);
-			host->status = "pio rx";
-		}
-	}
-
-	if (mci_csta & S3C2410_SDICMDSTAT_CMDTIMEOUT) {
-		dbg(host, dbg_err, "CMDSTAT: error CMDTIMEOUT\n");
-		cmd->error = -ETIMEDOUT;
-		host->status = "error: command timeout";
-		goto fail_transfer;
-	}
-
-	if (mci_csta & S3C2410_SDICMDSTAT_CMDSENT) {
-		if (host->complete_what == COMPLETION_CMDSENT) {
-			host->status = "ok: command sent";
-			goto close_transfer;
-		}
-
-		mci_cclear |= S3C2410_SDICMDSTAT_CMDSENT;
-	}
-
-	if (mci_csta & S3C2410_SDICMDSTAT_CRCFAIL) {
-		if (cmd->flags & MMC_RSP_CRC) {
-			if (host->mrq->cmd->flags & MMC_RSP_136) {
-				dbg(host, dbg_irq,
-				    "fixup: ignore CRC fail with long rsp\n");
-			} else {
-				/* note, we used to fail the transfer
-				 * here, but it seems that this is just
-				 * the hardware getting it wrong.
-				 *
-				 * cmd->error = -EILSEQ;
-				 * host->status = "error: bad command crc";
-				 * goto fail_transfer;
-				*/
-			}
-		}
-
-		mci_cclear |= S3C2410_SDICMDSTAT_CRCFAIL;
-	}
-
-	if (mci_csta & S3C2410_SDICMDSTAT_RSPFIN) {
-		if (host->complete_what == COMPLETION_RSPFIN) {
-			host->status = "ok: command response received";
-			goto close_transfer;
-		}
-
-		if (host->complete_what == COMPLETION_XFERFINISH_RSPFIN)
-			host->complete_what = COMPLETION_XFERFINISH;
-
-		mci_cclear |= S3C2410_SDICMDSTAT_RSPFIN;
-	}
-
-	/* errors handled after this point are only relevant
-	   when a data transfer is in progress */
-
-	if (!cmd->data)
-		goto clear_status_bits;
-
-	/* Check for FIFO failure */
-	if (host->is2440) {
-		if (mci_fsta & S3C2440_SDIFSTA_FIFOFAIL) {
-			dbg(host, dbg_err, "FIFO failure\n");
-			host->mrq->data->error = -EILSEQ;
-			host->status = "error: 2440 fifo failure";
-			goto fail_transfer;
-		}
-	} else {
-		if (mci_dsta & S3C2410_SDIDSTA_FIFOFAIL) {
-			dbg(host, dbg_err, "FIFO failure\n");
-			cmd->data->error = -EILSEQ;
-			host->status = "error:  fifo failure";
-			goto fail_transfer;
-		}
-	}
-
-	if (mci_dsta & S3C2410_SDIDSTA_RXCRCFAIL) {
-		dbg(host, dbg_err, "bad data crc (outgoing)\n");
-		cmd->data->error = -EILSEQ;
-		host->status = "error: bad data crc (outgoing)";
-		goto fail_transfer;
-	}
-
-	if (mci_dsta & S3C2410_SDIDSTA_CRCFAIL) {
-		dbg(host, dbg_err, "bad data crc (incoming)\n");
-		cmd->data->error = -EILSEQ;
-		host->status = "error: bad data crc (incoming)";
-		goto fail_transfer;
-	}
-
-	if (mci_dsta & S3C2410_SDIDSTA_DATATIMEOUT) {
-		dbg(host, dbg_err, "data timeout\n");
-		cmd->data->error = -ETIMEDOUT;
-		host->status = "error: data timeout";
-		goto fail_transfer;
-	}
-
-	if (mci_dsta & S3C2410_SDIDSTA_XFERFINISH) {
-		if (host->complete_what == COMPLETION_XFERFINISH) {
-			host->status = "ok: data transfer completed";
-			goto close_transfer;
-		}
-
-		if (host->complete_what == COMPLETION_XFERFINISH_RSPFIN)
-			host->complete_what = COMPLETION_RSPFIN;
-
-		mci_dclear |= S3C2410_SDIDSTA_XFERFINISH;
-	}
-
-clear_status_bits:
-	writel(mci_cclear, host->base + S3C2410_SDICMDSTAT);
-	writel(mci_dclear, host->base + S3C2410_SDIDSTA);
-
-	goto irq_out;
-
-fail_transfer:
-	host->pio_active = XFER_NONE;
-
-close_transfer:
-	host->complete_what = COMPLETION_FINALIZE;
-
-	clear_imask(host);
-	tasklet_schedule(&host->pio_tasklet);
-
-	goto irq_out;
-
-irq_out:
-	dbg(host, dbg_irq,
-	    "csta:0x%08x dsta:0x%08x fsta:0x%08x dcnt:0x%08x status:%s.\n",
-	    mci_csta, mci_dsta, mci_fsta, mci_dcnt, host->status);
-
-	spin_unlock_irqrestore(&host->complete_lock, iflags);
-	return IRQ_HANDLED;
-
-}
-
-static void s3cmci_dma_done_callback(void *arg)
-{
-	struct s3cmci_host *host = arg;
-	unsigned long iflags;
-
-	BUG_ON(!host->mrq);
-	BUG_ON(!host->mrq->data);
-
-	spin_lock_irqsave(&host->complete_lock, iflags);
-
-	dbg(host, dbg_dma, "DMA FINISHED\n");
-
-	host->dma_complete = 1;
-	host->complete_what = COMPLETION_FINALIZE;
-
-	tasklet_schedule(&host->pio_tasklet);
-	spin_unlock_irqrestore(&host->complete_lock, iflags);
-
-}
-
-static void finalize_request(struct s3cmci_host *host)
-{
-	struct mmc_request *mrq = host->mrq;
-	struct mmc_command *cmd;
-	int debug_as_failure = 0;
-
-	if (host->complete_what != COMPLETION_FINALIZE)
-		return;
-
-	if (!mrq)
-		return;
-	cmd = host->cmd_is_stop ? mrq->stop : mrq->cmd;
-
-	if (cmd->data && (cmd->error == 0) &&
-	    (cmd->data->error == 0)) {
-		if (s3cmci_host_usedma(host) && (!host->dma_complete)) {
-			dbg(host, dbg_dma, "DMA Missing (%d)!\n",
-			    host->dma_complete);
-			return;
-		}
-	}
-
-	/* Read response from controller. */
-	cmd->resp[0] = readl(host->base + S3C2410_SDIRSP0);
-	cmd->resp[1] = readl(host->base + S3C2410_SDIRSP1);
-	cmd->resp[2] = readl(host->base + S3C2410_SDIRSP2);
-	cmd->resp[3] = readl(host->base + S3C2410_SDIRSP3);
-
-	writel(host->prescaler, host->base + S3C2410_SDIPRE);
-
-	if (cmd->error)
-		debug_as_failure = 1;
-
-	if (cmd->data && cmd->data->error)
-		debug_as_failure = 1;
-
-	dbg_dumpcmd(host, cmd, debug_as_failure);
-
-	/* Cleanup controller */
-	writel(0, host->base + S3C2410_SDICMDARG);
-	writel(S3C2410_SDIDCON_STOP, host->base + S3C2410_SDIDCON);
-	writel(0, host->base + S3C2410_SDICMDCON);
-	clear_imask(host);
-
-	if (cmd->data && cmd->error)
-		cmd->data->error = cmd->error;
-
-	if (cmd->data && cmd->data->stop && (!host->cmd_is_stop)) {
-		host->cmd_is_stop = 1;
-		s3cmci_send_request(host->mmc);
-		return;
-	}
-
-	/* If we have no data transfer we are finished here */
-	if (!mrq->data)
-		goto request_done;
-
-	/* Calculate the amout of bytes transfer if there was no error */
-	if (mrq->data->error == 0) {
-		mrq->data->bytes_xfered =
-			(mrq->data->blocks * mrq->data->blksz);
-	} else {
-		mrq->data->bytes_xfered = 0;
-	}
-
-	/* If we had an error while transferring data we flush the
-	 * DMA channel and the fifo to clear out any garbage. */
-	if (mrq->data->error != 0) {
-		if (s3cmci_host_usedma(host))
-			dmaengine_terminate_all(host->dma);
-
-		if (host->is2440) {
-			/* Clear failure register and reset fifo. */
-			writel(S3C2440_SDIFSTA_FIFORESET |
-			       S3C2440_SDIFSTA_FIFOFAIL,
-			       host->base + S3C2410_SDIFSTA);
-		} else {
-			u32 mci_con;
-
-			/* reset fifo */
-			mci_con = readl(host->base + S3C2410_SDICON);
-			mci_con |= S3C2410_SDICON_FIFORESET;
-
-			writel(mci_con, host->base + S3C2410_SDICON);
-		}
-	}
-
-request_done:
-	host->complete_what = COMPLETION_NONE;
-	host->mrq = NULL;
-
-	s3cmci_check_sdio_irq(host);
-	mmc_request_done(host->mmc, mrq);
-}
-
-static void s3cmci_send_command(struct s3cmci_host *host,
-					struct mmc_command *cmd)
-{
-	u32 ccon, imsk;
-
-	imsk  = S3C2410_SDIIMSK_CRCSTATUS | S3C2410_SDIIMSK_CMDTIMEOUT |
-		S3C2410_SDIIMSK_RESPONSEND | S3C2410_SDIIMSK_CMDSENT |
-		S3C2410_SDIIMSK_RESPONSECRC;
-
-	enable_imask(host, imsk);
-
-	if (cmd->data)
-		host->complete_what = COMPLETION_XFERFINISH_RSPFIN;
-	else if (cmd->flags & MMC_RSP_PRESENT)
-		host->complete_what = COMPLETION_RSPFIN;
-	else
-		host->complete_what = COMPLETION_CMDSENT;
-
-	writel(cmd->arg, host->base + S3C2410_SDICMDARG);
-
-	ccon  = cmd->opcode & S3C2410_SDICMDCON_INDEX;
-	ccon |= S3C2410_SDICMDCON_SENDERHOST | S3C2410_SDICMDCON_CMDSTART;
-
-	if (cmd->flags & MMC_RSP_PRESENT)
-		ccon |= S3C2410_SDICMDCON_WAITRSP;
-
-	if (cmd->flags & MMC_RSP_136)
-		ccon |= S3C2410_SDICMDCON_LONGRSP;
-
-	writel(ccon, host->base + S3C2410_SDICMDCON);
-}
-
-static int s3cmci_setup_data(struct s3cmci_host *host, struct mmc_data *data)
-{
-	u32 dcon, imsk, stoptries = 3;
-
-	if ((data->blksz & 3) != 0) {
-		/* We cannot deal with unaligned blocks with more than
-		 * one block being transferred. */
-
-		if (data->blocks > 1) {
-			pr_warn("%s: can't do non-word sized block transfers (blksz %d)\n",
-				__func__, data->blksz);
-			return -EINVAL;
-		}
-	}
-
-	while (readl(host->base + S3C2410_SDIDSTA) &
-	       (S3C2410_SDIDSTA_TXDATAON | S3C2410_SDIDSTA_RXDATAON)) {
-
-		dbg(host, dbg_err,
-		    "mci_setup_data() transfer stillin progress.\n");
-
-		writel(S3C2410_SDIDCON_STOP, host->base + S3C2410_SDIDCON);
-		s3cmci_reset(host);
-
-		if ((stoptries--) == 0) {
-			dbg_dumpregs(host, "DRF");
-			return -EINVAL;
-		}
-	}
-
-	dcon  = data->blocks & S3C2410_SDIDCON_BLKNUM_MASK;
-
-	if (s3cmci_host_usedma(host))
-		dcon |= S3C2410_SDIDCON_DMAEN;
-
-	if (host->bus_width == MMC_BUS_WIDTH_4)
-		dcon |= S3C2410_SDIDCON_WIDEBUS;
-
-	dcon |= S3C2410_SDIDCON_BLOCKMODE;
-
-	if (data->flags & MMC_DATA_WRITE) {
-		dcon |= S3C2410_SDIDCON_TXAFTERRESP;
-		dcon |= S3C2410_SDIDCON_XFER_TXSTART;
-	}
-
-	if (data->flags & MMC_DATA_READ) {
-		dcon |= S3C2410_SDIDCON_RXAFTERCMD;
-		dcon |= S3C2410_SDIDCON_XFER_RXSTART;
-	}
-
-	if (host->is2440) {
-		dcon |= S3C2440_SDIDCON_DS_WORD;
-		dcon |= S3C2440_SDIDCON_DATSTART;
-	}
-
-	writel(dcon, host->base + S3C2410_SDIDCON);
-
-	/* write BSIZE register */
-
-	writel(data->blksz, host->base + S3C2410_SDIBSIZE);
-
-	/* add to IMASK register */
-	imsk = S3C2410_SDIIMSK_FIFOFAIL | S3C2410_SDIIMSK_DATACRC |
-	       S3C2410_SDIIMSK_DATATIMEOUT | S3C2410_SDIIMSK_DATAFINISH;
-
-	enable_imask(host, imsk);
-
-	/* write TIMER register */
-
-	if (host->is2440) {
-		writel(0x007FFFFF, host->base + S3C2410_SDITIMER);
-	} else {
-		writel(0x0000FFFF, host->base + S3C2410_SDITIMER);
-
-		/* FIX: set slow clock to prevent timeouts on read */
-		if (data->flags & MMC_DATA_READ)
-			writel(0xFF, host->base + S3C2410_SDIPRE);
-	}
-
-	return 0;
-}
-
-#define BOTH_DIR (MMC_DATA_WRITE | MMC_DATA_READ)
-
-static int s3cmci_prepare_pio(struct s3cmci_host *host, struct mmc_data *data)
-{
-	int rw = (data->flags & MMC_DATA_WRITE) ? 1 : 0;
-
-	BUG_ON((data->flags & BOTH_DIR) == BOTH_DIR);
-
-	host->pio_sgptr = 0;
-	host->pio_bytes = 0;
-	host->pio_count = 0;
-	host->pio_active = rw ? XFER_WRITE : XFER_READ;
-
-	if (rw) {
-		do_pio_write(host);
-		enable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF);
-	} else {
-		enable_imask(host, S3C2410_SDIIMSK_RXFIFOHALF
-			     | S3C2410_SDIIMSK_RXFIFOLAST);
-	}
-
-	return 0;
-}
-
-static int s3cmci_prepare_dma(struct s3cmci_host *host, struct mmc_data *data)
-{
-	int rw = data->flags & MMC_DATA_WRITE;
-	struct dma_async_tx_descriptor *desc;
-	struct dma_slave_config conf = {
-		.src_addr = host->mem->start + host->sdidata,
-		.dst_addr = host->mem->start + host->sdidata,
-		.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
-		.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
-	};
-
-	BUG_ON((data->flags & BOTH_DIR) == BOTH_DIR);
-
-	/* Restore prescaler value */
-	writel(host->prescaler, host->base + S3C2410_SDIPRE);
-
-	if (!rw)
-		conf.direction = DMA_DEV_TO_MEM;
-	else
-		conf.direction = DMA_MEM_TO_DEV;
-
-	dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
-		   mmc_get_dma_dir(data));
-
-	dmaengine_slave_config(host->dma, &conf);
-	desc = dmaengine_prep_slave_sg(host->dma, data->sg, data->sg_len,
-		conf.direction,
-		DMA_CTRL_ACK | DMA_PREP_INTERRUPT);
-	if (!desc)
-		goto unmap_exit;
-	desc->callback = s3cmci_dma_done_callback;
-	desc->callback_param = host;
-	dmaengine_submit(desc);
-	dma_async_issue_pending(host->dma);
-
-	return 0;
-
-unmap_exit:
-	dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
-		     mmc_get_dma_dir(data));
-	return -ENOMEM;
-}
-
-static void s3cmci_send_request(struct mmc_host *mmc)
-{
-	struct s3cmci_host *host = mmc_priv(mmc);
-	struct mmc_request *mrq = host->mrq;
-	struct mmc_command *cmd = host->cmd_is_stop ? mrq->stop : mrq->cmd;
-
-	host->ccnt++;
-	prepare_dbgmsg(host, cmd, host->cmd_is_stop);
-
-	/* Clear command, data and fifo status registers
-	   Fifo clear only necessary on 2440, but doesn't hurt on 2410
-	*/
-	writel(0xFFFFFFFF, host->base + S3C2410_SDICMDSTAT);
-	writel(0xFFFFFFFF, host->base + S3C2410_SDIDSTA);
-	writel(0xFFFFFFFF, host->base + S3C2410_SDIFSTA);
-
-	if (cmd->data) {
-		int res = s3cmci_setup_data(host, cmd->data);
-
-		host->dcnt++;
-
-		if (res) {
-			dbg(host, dbg_err, "setup data error %d\n", res);
-			cmd->error = res;
-			cmd->data->error = res;
-
-			mmc_request_done(mmc, mrq);
-			return;
-		}
-
-		if (s3cmci_host_usedma(host))
-			res = s3cmci_prepare_dma(host, cmd->data);
-		else
-			res = s3cmci_prepare_pio(host, cmd->data);
-
-		if (res) {
-			dbg(host, dbg_err, "data prepare error %d\n", res);
-			cmd->error = res;
-			cmd->data->error = res;
-
-			mmc_request_done(mmc, mrq);
-			return;
-		}
-	}
-
-	/* Send command */
-	s3cmci_send_command(host, cmd);
-
-	/* Enable Interrupt */
-	s3cmci_enable_irq(host, true);
-}
-
-static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
-{
-	struct s3cmci_host *host = mmc_priv(mmc);
-
-	host->status = "mmc request";
-	host->cmd_is_stop = 0;
-	host->mrq = mrq;
-
-	if (mmc_gpio_get_cd(mmc) == 0) {
-		dbg(host, dbg_err, "%s: no medium present\n", __func__);
-		host->mrq->cmd->error = -ENOMEDIUM;
-		mmc_request_done(mmc, mrq);
-	} else
-		s3cmci_send_request(mmc);
-}
-
-static void s3cmci_set_clk(struct s3cmci_host *host, struct mmc_ios *ios)
-{
-	u32 mci_psc;
-
-	/* Set clock */
-	for (mci_psc = 0; mci_psc < 255; mci_psc++) {
-		host->real_rate = host->clk_rate / (host->clk_div*(mci_psc+1));
-
-		if (host->real_rate <= ios->clock)
-			break;
-	}
-
-	if (mci_psc > 255)
-		mci_psc = 255;
-
-	host->prescaler = mci_psc;
-	writel(host->prescaler, host->base + S3C2410_SDIPRE);
-
-	/* If requested clock is 0, real_rate will be 0, too */
-	if (ios->clock == 0)
-		host->real_rate = 0;
-}
-
-static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
-{
-	struct s3cmci_host *host = mmc_priv(mmc);
-	u32 mci_con;
-
-	/* Set the power state */
-
-	mci_con = readl(host->base + S3C2410_SDICON);
-
-	switch (ios->power_mode) {
-	case MMC_POWER_ON:
-	case MMC_POWER_UP:
-		if (!host->is2440)
-			mci_con |= S3C2410_SDICON_FIFORESET;
-		break;
-
-	case MMC_POWER_OFF:
-	default:
-		if (host->is2440)
-			mci_con |= S3C2440_SDICON_SDRESET;
-		break;
-	}
-
-	if (host->pdata->set_power)
-		host->pdata->set_power(ios->power_mode, ios->vdd);
-
-	s3cmci_set_clk(host, ios);
-
-	/* Set CLOCK_ENABLE */
-	if (ios->clock)
-		mci_con |= S3C2410_SDICON_CLOCKTYPE;
-	else
-		mci_con &= ~S3C2410_SDICON_CLOCKTYPE;
-
-	writel(mci_con, host->base + S3C2410_SDICON);
-
-	if ((ios->power_mode == MMC_POWER_ON) ||
-	    (ios->power_mode == MMC_POWER_UP)) {
-		dbg(host, dbg_conf, "running at %lukHz (requested: %ukHz).\n",
-			host->real_rate/1000, ios->clock/1000);
-	} else {
-		dbg(host, dbg_conf, "powered down.\n");
-	}
-
-	host->bus_width = ios->bus_width;
-}
-
-static void s3cmci_reset(struct s3cmci_host *host)
-{
-	u32 con = readl(host->base + S3C2410_SDICON);
-
-	con |= S3C2440_SDICON_SDRESET;
-	writel(con, host->base + S3C2410_SDICON);
-}
-
-static void s3cmci_enable_sdio_irq(struct mmc_host *mmc, int enable)
-{
-	struct s3cmci_host *host = mmc_priv(mmc);
-	unsigned long flags;
-	u32 con;
-
-	local_irq_save(flags);
-
-	con = readl(host->base + S3C2410_SDICON);
-	host->sdio_irqen = enable;
-
-	if (enable == host->sdio_irqen)
-		goto same_state;
-
-	if (enable) {
-		con |= S3C2410_SDICON_SDIOIRQ;
-		enable_imask(host, S3C2410_SDIIMSK_SDIOIRQ);
-
-		if (!host->irq_state && !host->irq_disabled) {
-			host->irq_state = true;
-			enable_irq(host->irq);
-		}
-	} else {
-		disable_imask(host, S3C2410_SDIIMSK_SDIOIRQ);
-		con &= ~S3C2410_SDICON_SDIOIRQ;
-
-		if (!host->irq_enabled && host->irq_state) {
-			disable_irq_nosync(host->irq);
-			host->irq_state = false;
-		}
-	}
-
-	writel(con, host->base + S3C2410_SDICON);
-
- same_state:
-	local_irq_restore(flags);
-
-	s3cmci_check_sdio_irq(host);
-}
-
-static const struct mmc_host_ops s3cmci_ops = {
-	.request	= s3cmci_request,
-	.set_ios	= s3cmci_set_ios,
-	.get_ro		= mmc_gpio_get_ro,
-	.get_cd		= mmc_gpio_get_cd,
-	.enable_sdio_irq = s3cmci_enable_sdio_irq,
-};
-
-#ifdef CONFIG_ARM_S3C24XX_CPUFREQ
-
-static int s3cmci_cpufreq_transition(struct notifier_block *nb,
-				     unsigned long val, void *data)
-{
-	struct s3cmci_host *host;
-	struct mmc_host *mmc;
-	unsigned long newclk;
-	unsigned long flags;
-
-	host = container_of(nb, struct s3cmci_host, freq_transition);
-	newclk = clk_get_rate(host->clk);
-	mmc = host->mmc;
-
-	if ((val == CPUFREQ_PRECHANGE && newclk > host->clk_rate) ||
-	    (val == CPUFREQ_POSTCHANGE && newclk < host->clk_rate)) {
-		spin_lock_irqsave(&mmc->lock, flags);
-
-		host->clk_rate = newclk;
-
-		if (mmc->ios.power_mode != MMC_POWER_OFF &&
-		    mmc->ios.clock != 0)
-			s3cmci_set_clk(host, &mmc->ios);
-
-		spin_unlock_irqrestore(&mmc->lock, flags);
-	}
-
-	return 0;
-}
-
-static inline int s3cmci_cpufreq_register(struct s3cmci_host *host)
-{
-	host->freq_transition.notifier_call = s3cmci_cpufreq_transition;
-
-	return cpufreq_register_notifier(&host->freq_transition,
-					 CPUFREQ_TRANSITION_NOTIFIER);
-}
-
-static inline void s3cmci_cpufreq_deregister(struct s3cmci_host *host)
-{
-	cpufreq_unregister_notifier(&host->freq_transition,
-				    CPUFREQ_TRANSITION_NOTIFIER);
-}
-
-#else
-static inline int s3cmci_cpufreq_register(struct s3cmci_host *host)
-{
-	return 0;
-}
-
-static inline void s3cmci_cpufreq_deregister(struct s3cmci_host *host)
-{
-}
-#endif
-
-
-#ifdef CONFIG_DEBUG_FS
-
-static int s3cmci_state_show(struct seq_file *seq, void *v)
-{
-	struct s3cmci_host *host = seq->private;
-
-	seq_printf(seq, "Register base = 0x%p\n", host->base);
-	seq_printf(seq, "Clock rate = %ld\n", host->clk_rate);
-	seq_printf(seq, "Prescale = %d\n", host->prescaler);
-	seq_printf(seq, "is2440 = %d\n", host->is2440);
-	seq_printf(seq, "IRQ = %d\n", host->irq);
-	seq_printf(seq, "IRQ enabled = %d\n", host->irq_enabled);
-	seq_printf(seq, "IRQ disabled = %d\n", host->irq_disabled);
-	seq_printf(seq, "IRQ state = %d\n", host->irq_state);
-	seq_printf(seq, "CD IRQ = %d\n", host->irq_cd);
-	seq_printf(seq, "Do DMA = %d\n", s3cmci_host_usedma(host));
-	seq_printf(seq, "SDIIMSK at %d\n", host->sdiimsk);
-	seq_printf(seq, "SDIDATA at %d\n", host->sdidata);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(s3cmci_state);
-
-#define DBG_REG(_r) { .addr = S3C2410_SDI##_r, .name = #_r }
-
-struct s3cmci_reg {
-	unsigned short	addr;
-	unsigned char	*name;
-};
-
-static const struct s3cmci_reg debug_regs[] = {
-	DBG_REG(CON),
-	DBG_REG(PRE),
-	DBG_REG(CMDARG),
-	DBG_REG(CMDCON),
-	DBG_REG(CMDSTAT),
-	DBG_REG(RSP0),
-	DBG_REG(RSP1),
-	DBG_REG(RSP2),
-	DBG_REG(RSP3),
-	DBG_REG(TIMER),
-	DBG_REG(BSIZE),
-	DBG_REG(DCON),
-	DBG_REG(DCNT),
-	DBG_REG(DSTA),
-	DBG_REG(FSTA),
-	{}
-};
-
-static int s3cmci_regs_show(struct seq_file *seq, void *v)
-{
-	struct s3cmci_host *host = seq->private;
-	const struct s3cmci_reg *rptr = debug_regs;
-
-	for (; rptr->name; rptr++)
-		seq_printf(seq, "SDI%s\t=0x%08x\n", rptr->name,
-			   readl(host->base + rptr->addr));
-
-	seq_printf(seq, "SDIIMSK\t=0x%08x\n", readl(host->base + host->sdiimsk));
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(s3cmci_regs);
-
-static void s3cmci_debugfs_attach(struct s3cmci_host *host)
-{
-	struct device *dev = &host->pdev->dev;
-	struct dentry *root;
-
-	root = debugfs_create_dir(dev_name(dev), NULL);
-	host->debug_root = root;
-
-	debugfs_create_file("state", 0444, root, host, &s3cmci_state_fops);
-	debugfs_create_file("regs", 0444, root, host, &s3cmci_regs_fops);
-}
-
-static void s3cmci_debugfs_remove(struct s3cmci_host *host)
-{
-	debugfs_remove_recursive(host->debug_root);
-}
-
-#else
-static inline void s3cmci_debugfs_attach(struct s3cmci_host *host) { }
-static inline void s3cmci_debugfs_remove(struct s3cmci_host *host) { }
-
-#endif /* CONFIG_DEBUG_FS */
-
-static int s3cmci_probe_pdata(struct s3cmci_host *host)
-{
-	struct platform_device *pdev = host->pdev;
-	struct mmc_host *mmc = host->mmc;
-	struct s3c24xx_mci_pdata *pdata;
-	int i, ret;
-
-	host->is2440 = platform_get_device_id(pdev)->driver_data;
-	pdata = pdev->dev.platform_data;
-	if (!pdata) {
-		dev_err(&pdev->dev, "need platform data");
-		return -ENXIO;
-	}
-
-	for (i = 0; i < 6; i++) {
-		pdata->bus[i] = devm_gpiod_get_index(&pdev->dev, "bus", i,
-						     GPIOD_OUT_LOW);
-		if (IS_ERR(pdata->bus[i])) {
-			dev_err(&pdev->dev, "failed to get gpio %d\n", i);
-			return PTR_ERR(pdata->bus[i]);
-		}
-	}
-
-	if (pdata->no_wprotect)
-		mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT;
-
-	if (pdata->no_detect)
-		mmc->caps |= MMC_CAP_NEEDS_POLL;
-
-	if (pdata->wprotect_invert)
-		mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
-
-	/* If we get -ENOENT we have no card detect GPIO line */
-	ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0);
-	if (ret != -ENOENT) {
-		dev_err(&pdev->dev, "error requesting GPIO for CD %d\n",
-			ret);
-		return ret;
-	}
-
-	ret = mmc_gpiod_request_ro(host->mmc, "wp", 0, 0);
-	if (ret != -ENOENT) {
-		dev_err(&pdev->dev, "error requesting GPIO for WP %d\n",
-			ret);
-		return ret;
-	}
-
-	return 0;
-}
-
-static int s3cmci_probe_dt(struct s3cmci_host *host)
-{
-	struct platform_device *pdev = host->pdev;
-	struct s3c24xx_mci_pdata *pdata;
-	struct mmc_host *mmc = host->mmc;
-	int ret;
-
-	host->is2440 = (long) of_device_get_match_data(&pdev->dev);
-
-	ret = mmc_of_parse(mmc);
-	if (ret)
-		return ret;
-
-	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
-	if (!pdata)
-		return -ENOMEM;
-
-	pdev->dev.platform_data = pdata;
-
-	return 0;
-}
-
-static int s3cmci_probe(struct platform_device *pdev)
-{
-	struct s3cmci_host *host;
-	struct mmc_host	*mmc;
-	int ret;
-
-	mmc = mmc_alloc_host(sizeof(struct s3cmci_host), &pdev->dev);
-	if (!mmc) {
-		ret = -ENOMEM;
-		goto probe_out;
-	}
-
-	host = mmc_priv(mmc);
-	host->mmc 	= mmc;
-	host->pdev	= pdev;
-
-	if (pdev->dev.of_node)
-		ret = s3cmci_probe_dt(host);
-	else
-		ret = s3cmci_probe_pdata(host);
-
-	if (ret)
-		goto probe_free_host;
-
-	host->pdata = pdev->dev.platform_data;
-
-	spin_lock_init(&host->complete_lock);
-	tasklet_setup(&host->pio_tasklet, pio_tasklet);
-
-	if (host->is2440) {
-		host->sdiimsk	= S3C2440_SDIIMSK;
-		host->sdidata	= S3C2440_SDIDATA;
-		host->clk_div	= 1;
-	} else {
-		host->sdiimsk	= S3C2410_SDIIMSK;
-		host->sdidata	= S3C2410_SDIDATA;
-		host->clk_div	= 2;
-	}
-
-	host->complete_what 	= COMPLETION_NONE;
-	host->pio_active 	= XFER_NONE;
-
-	host->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!host->mem) {
-		dev_err(&pdev->dev,
-			"failed to get io memory region resource.\n");
-
-		ret = -ENOENT;
-		goto probe_free_host;
-	}
-
-	host->mem = request_mem_region(host->mem->start,
-				       resource_size(host->mem), pdev->name);
-
-	if (!host->mem) {
-		dev_err(&pdev->dev, "failed to request io memory region.\n");
-		ret = -ENOENT;
-		goto probe_free_host;
-	}
-
-	host->base = ioremap(host->mem->start, resource_size(host->mem));
-	if (!host->base) {
-		dev_err(&pdev->dev, "failed to ioremap() io memory region.\n");
-		ret = -EINVAL;
-		goto probe_free_mem_region;
-	}
-
-	host->irq = platform_get_irq(pdev, 0);
-	if (host->irq <= 0) {
-		ret = -EINVAL;
-		goto probe_iounmap;
-	}
-
-	if (request_irq(host->irq, s3cmci_irq, IRQF_NO_AUTOEN, DRIVER_NAME, host)) {
-		dev_err(&pdev->dev, "failed to request mci interrupt.\n");
-		ret = -ENOENT;
-		goto probe_iounmap;
-	}
-
-	host->irq_state = false;
-
-	/* Depending on the dma state, get a DMA channel to use. */
-
-	if (s3cmci_host_usedma(host)) {
-		host->dma = dma_request_chan(&pdev->dev, "rx-tx");
-		ret = PTR_ERR_OR_ZERO(host->dma);
-		if (ret) {
-			dev_err(&pdev->dev, "cannot get DMA channel.\n");
-			goto probe_free_irq;
-		}
-	}
-
-	host->clk = clk_get(&pdev->dev, "sdi");
-	if (IS_ERR(host->clk)) {
-		dev_err(&pdev->dev, "failed to find clock source.\n");
-		ret = PTR_ERR(host->clk);
-		host->clk = NULL;
-		goto probe_free_dma;
-	}
-
-	ret = clk_prepare_enable(host->clk);
-	if (ret) {
-		dev_err(&pdev->dev, "failed to enable clock source.\n");
-		goto clk_free;
-	}
-
-	host->clk_rate = clk_get_rate(host->clk);
-
-	mmc->ops 	= &s3cmci_ops;
-	mmc->ocr_avail	= MMC_VDD_32_33 | MMC_VDD_33_34;
-#ifdef CONFIG_MMC_S3C_HW_SDIO_IRQ
-	mmc->caps	= MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ;
-#else
-	mmc->caps	= MMC_CAP_4_BIT_DATA;
-#endif
-	mmc->f_min 	= host->clk_rate / (host->clk_div * 256);
-	mmc->f_max 	= host->clk_rate / host->clk_div;
-
-	if (host->pdata->ocr_avail)
-		mmc->ocr_avail = host->pdata->ocr_avail;
-
-	mmc->max_blk_count	= 4095;
-	mmc->max_blk_size	= 4095;
-	mmc->max_req_size	= 4095 * 512;
-	mmc->max_seg_size	= mmc->max_req_size;
-
-	mmc->max_segs		= 128;
-
-	dbg(host, dbg_debug,
-	    "probe: mode:%s mapped mci_base:%p irq:%u irq_cd:%u dma:%p.\n",
-	    (host->is2440?"2440":""),
-	    host->base, host->irq, host->irq_cd, host->dma);
-
-	ret = s3cmci_cpufreq_register(host);
-	if (ret) {
-		dev_err(&pdev->dev, "failed to register cpufreq\n");
-		goto free_dmabuf;
-	}
-
-	ret = mmc_add_host(mmc);
-	if (ret) {
-		dev_err(&pdev->dev, "failed to add mmc host.\n");
-		goto free_cpufreq;
-	}
-
-	s3cmci_debugfs_attach(host);
-
-	platform_set_drvdata(pdev, mmc);
-	dev_info(&pdev->dev, "%s - using %s, %s SDIO IRQ\n", mmc_hostname(mmc),
-		 s3cmci_host_usedma(host) ? "dma" : "pio",
-		 mmc->caps & MMC_CAP_SDIO_IRQ ? "hw" : "sw");
-
-	return 0;
-
- free_cpufreq:
-	s3cmci_cpufreq_deregister(host);
-
- free_dmabuf:
-	clk_disable_unprepare(host->clk);
-
- clk_free:
-	clk_put(host->clk);
-
- probe_free_dma:
-	if (s3cmci_host_usedma(host))
-		dma_release_channel(host->dma);
-
- probe_free_irq:
-	free_irq(host->irq, host);
-
- probe_iounmap:
-	iounmap(host->base);
-
- probe_free_mem_region:
-	release_mem_region(host->mem->start, resource_size(host->mem));
-
- probe_free_host:
-	mmc_free_host(mmc);
-
- probe_out:
-	return ret;
-}
-
-static void s3cmci_shutdown(struct platform_device *pdev)
-{
-	struct mmc_host	*mmc = platform_get_drvdata(pdev);
-	struct s3cmci_host *host = mmc_priv(mmc);
-
-	if (host->irq_cd >= 0)
-		free_irq(host->irq_cd, host);
-
-	s3cmci_debugfs_remove(host);
-	s3cmci_cpufreq_deregister(host);
-	mmc_remove_host(mmc);
-	clk_disable_unprepare(host->clk);
-}
-
-static int s3cmci_remove(struct platform_device *pdev)
-{
-	struct mmc_host		*mmc  = platform_get_drvdata(pdev);
-	struct s3cmci_host	*host = mmc_priv(mmc);
-
-	s3cmci_shutdown(pdev);
-
-	clk_put(host->clk);
-
-	tasklet_disable(&host->pio_tasklet);
-
-	if (s3cmci_host_usedma(host))
-		dma_release_channel(host->dma);
-
-	free_irq(host->irq, host);
-
-	iounmap(host->base);
-	release_mem_region(host->mem->start, resource_size(host->mem));
-
-	mmc_free_host(mmc);
-	return 0;
-}
-
-static const struct of_device_id s3cmci_dt_match[] = {
-	{
-		.compatible = "samsung,s3c2410-sdi",
-		.data = (void *)0,
-	},
-	{
-		.compatible = "samsung,s3c2412-sdi",
-		.data = (void *)1,
-	},
-	{
-		.compatible = "samsung,s3c2440-sdi",
-		.data = (void *)1,
-	},
-	{ /* sentinel */ },
-};
-MODULE_DEVICE_TABLE(of, s3cmci_dt_match);
-
-static const struct platform_device_id s3cmci_driver_ids[] = {
-	{
-		.name	= "s3c2410-sdi",
-		.driver_data	= 0,
-	}, {
-		.name	= "s3c2412-sdi",
-		.driver_data	= 1,
-	}, {
-		.name	= "s3c2440-sdi",
-		.driver_data	= 1,
-	},
-	{ }
-};
-
-MODULE_DEVICE_TABLE(platform, s3cmci_driver_ids);
-
-static struct platform_driver s3cmci_driver = {
-	.driver	= {
-		.name	= "s3c-sdi",
-		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
-		.of_match_table = s3cmci_dt_match,
-	},
-	.id_table	= s3cmci_driver_ids,
-	.probe		= s3cmci_probe,
-	.remove		= s3cmci_remove,
-	.shutdown	= s3cmci_shutdown,
-};
-
-module_platform_driver(s3cmci_driver);
-
-MODULE_DESCRIPTION("Samsung S3C MMC/SD Card Interface driver");
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Thomas Kleffel <tk@maintech.de>, Ben Dooks <ben-linux@fluff.org>");
diff --git a/drivers/mmc/host/s3cmci.h b/drivers/mmc/host/s3cmci.h
deleted file mode 100644
index 8b65d7ad9f97..000000000000
--- a/drivers/mmc/host/s3cmci.h
+++ /dev/null
@@ -1,75 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- *  linux/drivers/mmc/s3cmci.h - Samsung S3C MCI driver
- *
- *  Copyright (C) 2004-2006 Thomas Kleffel, All Rights Reserved.
- */
-
-enum s3cmci_waitfor {
-	COMPLETION_NONE,
-	COMPLETION_FINALIZE,
-	COMPLETION_CMDSENT,
-	COMPLETION_RSPFIN,
-	COMPLETION_XFERFINISH,
-	COMPLETION_XFERFINISH_RSPFIN,
-};
-
-struct s3cmci_host {
-	struct platform_device	*pdev;
-	struct s3c24xx_mci_pdata *pdata;
-	struct mmc_host		*mmc;
-	struct resource		*mem;
-	struct clk		*clk;
-	void __iomem		*base;
-	int			irq;
-	int			irq_cd;
-	struct dma_chan		*dma;
-
-	unsigned long		clk_rate;
-	unsigned long		clk_div;
-	unsigned long		real_rate;
-	u8			prescaler;
-
-	int			is2440;
-	unsigned		sdiimsk;
-	unsigned		sdidata;
-
-	bool			irq_disabled;
-	bool			irq_enabled;
-	bool			irq_state;
-	int			sdio_irqen;
-
-	struct mmc_request	*mrq;
-	int			cmd_is_stop;
-
-	spinlock_t		complete_lock;
-	enum s3cmci_waitfor	complete_what;
-
-	int			dma_complete;
-
-	u32			pio_sgptr;
-	u32			pio_bytes;
-	u32			pio_count;
-	u32			*pio_ptr;
-#define XFER_NONE 0
-#define XFER_READ 1
-#define XFER_WRITE 2
-	u32			pio_active;
-
-	int			bus_width;
-
-	char 			dbgmsg_cmd[301];
-	char 			dbgmsg_dat[301];
-	char			*status;
-
-	unsigned int		ccnt, dcnt;
-	struct tasklet_struct	pio_tasklet;
-
-#ifdef CONFIG_DEBUG_FS
-	struct dentry		*debug_root;
-#endif
-
-#ifdef CONFIG_ARM_S3C24XX_CPUFREQ
-	struct notifier_block	freq_transition;
-#endif
-};