[09/10] ide: tx4938ide: Remove driver

Message ID 20210105140305.141401-10-tsbogend@alpha.franken.de
State New
Headers show
Series
  • Remove support for TX49xx
Related show

Commit Message

Thomas Bogendoerfer Jan. 5, 2021, 2:02 p.m.
CPU support for TX49xx is getting removed, so remove IDE support for it.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 drivers/ide/Kconfig     |  10 -
 drivers/ide/Makefile    |   3 -
 drivers/ide/tx4938ide.c | 209 -------------
 drivers/ide/tx4939ide.c | 628 ----------------------------------------
 4 files changed, 850 deletions(-)
 delete mode 100644 drivers/ide/tx4938ide.c
 delete mode 100644 drivers/ide/tx4939ide.c

Patch

diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index 19abf11c84c8..03303af8c96f 100644
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -662,16 +662,6 @@  config BLK_DEV_IDE_PMAC_ATA100FIRST
 	  CD-ROM on hda. This option changes this to more natural hda for
 	  hard disk and hdc for CD-ROM.
 
-config BLK_DEV_IDE_TX4938
-	tristate "TX4938 internal IDE support"
-	depends on SOC_TX4938
-	select IDE_TIMINGS
-
-config BLK_DEV_IDE_TX4939
-	tristate "TX4939 internal IDE support"
-	depends on SOC_TX4939
-	select BLK_DEV_IDEDMA_SFF
-
 config BLK_DEV_IDE_ICSIDE
 	tristate "ICS IDE interface support"
 	depends on ARM && ARCH_ACORN
diff --git a/drivers/ide/Makefile b/drivers/ide/Makefile
index 2605b3cdaf47..4d6655160a4a 100644
--- a/drivers/ide/Makefile
+++ b/drivers/ide/Makefile
@@ -106,6 +106,3 @@  obj-$(CONFIG_BLK_DEV_PLATFORM)		+= ide_platform.o
 obj-$(CONFIG_BLK_DEV_IDE_ICSIDE)	+= icside.o
 obj-$(CONFIG_BLK_DEV_IDE_RAPIDE)	+= rapide.o
 obj-$(CONFIG_BLK_DEV_PALMCHIP_BK3710)	+= palm_bk3710.o
-
-obj-$(CONFIG_BLK_DEV_IDE_TX4938)	+= tx4938ide.o
-obj-$(CONFIG_BLK_DEV_IDE_TX4939)	+= tx4939ide.o
diff --git a/drivers/ide/tx4938ide.c b/drivers/ide/tx4938ide.c
deleted file mode 100644
index 962eb92501b5..000000000000
--- a/drivers/ide/tx4938ide.c
+++ /dev/null
@@ -1,209 +0,0 @@ 
-/*
- * TX4938 internal IDE driver
- * Based on tx4939ide.c.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * (C) Copyright TOSHIBA CORPORATION 2005-2007
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/ide.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-
-#include <asm/ide.h>
-#include <asm/txx9/tx4938.h>
-
-static void tx4938ide_tune_ebusc(unsigned int ebus_ch,
-				 unsigned int gbus_clock,
-				 u8 pio)
-{
-	struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
-	u64 cr = __raw_readq(&tx4938_ebuscptr->cr[ebus_ch]);
-	unsigned int sp = (cr >> 4) & 3;
-	unsigned int clock = gbus_clock / (4 - sp);
-	unsigned int cycle = 1000000000 / clock;
-	unsigned int shwt;
-	int wt;
-
-	/* Minimum DIOx- active time */
-	wt = DIV_ROUND_UP(t->act8b, cycle) - 2;
-	/* IORDY setup time: 35ns */
-	wt = max_t(int, wt, DIV_ROUND_UP(35, cycle));
-	/* actual wait-cycle is max(wt & ~1, 1) */
-	if (wt > 2 && (wt & 1))
-		wt++;
-	wt &= ~1;
-	/* Address-valid to DIOR/DIOW setup */
-	shwt = DIV_ROUND_UP(t->setup, cycle);
-
-	/* -DIOx recovery time (SHWT * 4) and cycle time requirement */
-	while ((shwt * 4 + wt + (wt ? 2 : 3)) * cycle < t->cycle)
-		shwt++;
-	if (shwt > 7) {
-		pr_warn("tx4938ide: SHWT violation (%d)\n", shwt);
-		shwt = 7;
-	}
-	pr_debug("tx4938ide: ebus %d, bus cycle %dns, WT %d, SHWT %d\n",
-		 ebus_ch, cycle, wt, shwt);
-
-	__raw_writeq((cr & ~0x3f007ull) | (wt << 12) | shwt,
-		     &tx4938_ebuscptr->cr[ebus_ch]);
-}
-
-static void tx4938ide_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
-{
-	struct tx4938ide_platform_info *pdata = dev_get_platdata(hwif->dev);
-	u8 safe = drive->pio_mode - XFER_PIO_0;
-	ide_drive_t *pair;
-
-	pair = ide_get_pair_dev(drive);
-	if (pair)
-		safe = min_t(u8, safe, pair->pio_mode - XFER_PIO_0);
-	tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, safe);
-}
-
-#ifdef __BIG_ENDIAN
-
-/* custom iops (independent from SWAP_IO_SPACE) */
-static void tx4938ide_input_data_swap(ide_drive_t *drive, struct ide_cmd *cmd,
-				void *buf, unsigned int len)
-{
-	unsigned long port = drive->hwif->io_ports.data_addr;
-	unsigned short *ptr = buf;
-	unsigned int count = (len + 1) / 2;
-
-	while (count--)
-		*ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port));
-	__ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
-}
-
-static void tx4938ide_output_data_swap(ide_drive_t *drive, struct ide_cmd *cmd,
-				void *buf, unsigned int len)
-{
-	unsigned long port = drive->hwif->io_ports.data_addr;
-	unsigned short *ptr = buf;
-	unsigned int count = (len + 1) / 2;
-
-	while (count--) {
-		__raw_writew(le16_to_cpu(*ptr), (void __iomem *)port);
-		ptr++;
-	}
-	__ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
-}
-
-static const struct ide_tp_ops tx4938ide_tp_ops = {
-	.exec_command		= ide_exec_command,
-	.read_status		= ide_read_status,
-	.read_altstatus		= ide_read_altstatus,
-	.write_devctl		= ide_write_devctl,
-
-	.dev_select		= ide_dev_select,
-	.tf_load		= ide_tf_load,
-	.tf_read		= ide_tf_read,
-
-	.input_data		= tx4938ide_input_data_swap,
-	.output_data		= tx4938ide_output_data_swap,
-};
-
-#endif	/* __BIG_ENDIAN */
-
-static const struct ide_port_ops tx4938ide_port_ops = {
-	.set_pio_mode		= tx4938ide_set_pio_mode,
-};
-
-static const struct ide_port_info tx4938ide_port_info __initconst = {
-	.port_ops		= &tx4938ide_port_ops,
-#ifdef __BIG_ENDIAN
-	.tp_ops			= &tx4938ide_tp_ops,
-#endif
-	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
-	.pio_mask		= ATA_PIO5,
-	.chipset		= ide_generic,
-};
-
-static int __init tx4938ide_probe(struct platform_device *pdev)
-{
-	struct ide_hw hw, *hws[] = { &hw };
-	struct ide_host *host;
-	struct resource *res;
-	struct tx4938ide_platform_info *pdata = dev_get_platdata(&pdev->dev);
-	int irq, ret, i;
-	unsigned long mapbase, mapctl;
-	struct ide_port_info d = tx4938ide_port_info;
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return -ENODEV;
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENODEV;
-
-	if (!devm_request_mem_region(&pdev->dev, res->start,
-				     resource_size(res), "tx4938ide"))
-		return -EBUSY;
-	mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start,
-					      8 << pdata->ioport_shift);
-	mapctl = (unsigned long)devm_ioremap(&pdev->dev,
-					     res->start + 0x10000 +
-					     (6 << pdata->ioport_shift),
-					     1 << pdata->ioport_shift);
-	if (!mapbase || !mapctl)
-		return -EBUSY;
-
-	memset(&hw, 0, sizeof(hw));
-	if (pdata->ioport_shift) {
-		unsigned long port = mapbase;
-		unsigned long ctl = mapctl;
-
-		hw.io_ports_array[0] = port;
-#ifdef __BIG_ENDIAN
-		port++;
-		ctl++;
-#endif
-		for (i = 1; i <= 7; i++)
-			hw.io_ports_array[i] =
-				port + (i << pdata->ioport_shift);
-		hw.io_ports.ctl_addr = ctl;
-	} else
-		ide_std_init_ports(&hw, mapbase, mapctl);
-	hw.irq = irq;
-	hw.dev = &pdev->dev;
-
-	pr_info("TX4938 IDE interface (base %#lx, ctl %#lx, irq %d)\n",
-		mapbase, mapctl, hw.irq);
-	if (pdata->gbus_clock)
-		tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, 0);
-	else
-		d.port_ops = NULL;
-	ret = ide_host_add(&d, hws, 1, &host);
-	if (!ret)
-		platform_set_drvdata(pdev, host);
-	return ret;
-}
-
-static int __exit tx4938ide_remove(struct platform_device *pdev)
-{
-	struct ide_host *host = platform_get_drvdata(pdev);
-
-	ide_host_remove(host);
-	return 0;
-}
-
-static struct platform_driver tx4938ide_driver = {
-	.driver		= {
-		.name	= "tx4938ide",
-	},
-	.remove = __exit_p(tx4938ide_remove),
-};
-
-module_platform_driver_probe(tx4938ide_driver, tx4938ide_probe);
-
-MODULE_DESCRIPTION("TX4938 internal IDE driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:tx4938ide");
diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c
deleted file mode 100644
index b1bbf807bb3d..000000000000
--- a/drivers/ide/tx4939ide.c
+++ /dev/null
@@ -1,628 +0,0 @@ 
-/*
- * TX4939 internal IDE driver
- * Based on RBTX49xx patch from CELF patch archive.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * (C) Copyright TOSHIBA CORPORATION 2005-2007
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/ide.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/scatterlist.h>
-
-#include <asm/ide.h>
-
-#define MODNAME	"tx4939ide"
-
-/* ATA Shadow Registers (8-bit except for Data which is 16-bit) */
-#define TX4939IDE_Data			0x000
-#define TX4939IDE_Error_Feature		0x001
-#define TX4939IDE_Sec			0x002
-#define TX4939IDE_LBA0			0x003
-#define TX4939IDE_LBA1			0x004
-#define TX4939IDE_LBA2			0x005
-#define TX4939IDE_DevHead		0x006
-#define TX4939IDE_Stat_Cmd		0x007
-#define TX4939IDE_AltStat_DevCtl	0x402
-/* H/W DMA Registers  */
-#define TX4939IDE_DMA_Cmd	0x800	/* 8-bit */
-#define TX4939IDE_DMA_Stat	0x802	/* 8-bit */
-#define TX4939IDE_PRD_Ptr	0x804	/* 32-bit */
-/* ATA100 CORE Registers (16-bit) */
-#define TX4939IDE_Sys_Ctl	0xc00
-#define TX4939IDE_Xfer_Cnt_1	0xc08
-#define TX4939IDE_Xfer_Cnt_2	0xc0a
-#define TX4939IDE_Sec_Cnt	0xc10
-#define TX4939IDE_Start_Lo_Addr	0xc18
-#define TX4939IDE_Start_Up_Addr	0xc20
-#define TX4939IDE_Add_Ctl	0xc28
-#define TX4939IDE_Lo_Burst_Cnt	0xc30
-#define TX4939IDE_Up_Burst_Cnt	0xc38
-#define TX4939IDE_PIO_Addr	0xc88
-#define TX4939IDE_H_Rst_Tim	0xc90
-#define TX4939IDE_Int_Ctl	0xc98
-#define TX4939IDE_Pkt_Cmd	0xcb8
-#define TX4939IDE_Bxfer_Cnt_Hi	0xcc0
-#define TX4939IDE_Bxfer_Cnt_Lo	0xcc8
-#define TX4939IDE_Dev_TErr	0xcd0
-#define TX4939IDE_Pkt_Xfer_Ctl	0xcd8
-#define TX4939IDE_Start_TAddr	0xce0
-
-/* bits for Int_Ctl */
-#define TX4939IDE_INT_ADDRERR	0x80
-#define TX4939IDE_INT_REACHMUL	0x40
-#define TX4939IDE_INT_DEVTIMING	0x20
-#define TX4939IDE_INT_UDMATERM	0x10
-#define TX4939IDE_INT_TIMER	0x08
-#define TX4939IDE_INT_BUSERR	0x04
-#define TX4939IDE_INT_XFEREND	0x02
-#define TX4939IDE_INT_HOST	0x01
-
-#define TX4939IDE_IGNORE_INTS	\
-	(TX4939IDE_INT_ADDRERR | TX4939IDE_INT_REACHMUL | \
-	 TX4939IDE_INT_DEVTIMING | TX4939IDE_INT_UDMATERM | \
-	 TX4939IDE_INT_TIMER | TX4939IDE_INT_XFEREND)
-
-#ifdef __BIG_ENDIAN
-#define tx4939ide_swizzlel(a)	((a) ^ 4)
-#define tx4939ide_swizzlew(a)	((a) ^ 6)
-#define tx4939ide_swizzleb(a)	((a) ^ 7)
-#else
-#define tx4939ide_swizzlel(a)	(a)
-#define tx4939ide_swizzlew(a)	(a)
-#define tx4939ide_swizzleb(a)	(a)
-#endif
-
-static u16 tx4939ide_readw(void __iomem *base, u32 reg)
-{
-	return __raw_readw(base + tx4939ide_swizzlew(reg));
-}
-static u8 tx4939ide_readb(void __iomem *base, u32 reg)
-{
-	return __raw_readb(base + tx4939ide_swizzleb(reg));
-}
-static void tx4939ide_writel(u32 val, void __iomem *base, u32 reg)
-{
-	__raw_writel(val, base + tx4939ide_swizzlel(reg));
-}
-static void tx4939ide_writew(u16 val, void __iomem *base, u32 reg)
-{
-	__raw_writew(val, base + tx4939ide_swizzlew(reg));
-}
-static void tx4939ide_writeb(u8 val, void __iomem *base, u32 reg)
-{
-	__raw_writeb(val, base + tx4939ide_swizzleb(reg));
-}
-
-#define TX4939IDE_BASE(hwif)	((void __iomem *)(hwif)->extra_base)
-
-static void tx4939ide_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
-{
-	int is_slave = drive->dn;
-	u32 mask, val;
-	const u8 pio = drive->pio_mode - XFER_PIO_0;
-	u8 safe = pio;
-	ide_drive_t *pair;
-
-	pair = ide_get_pair_dev(drive);
-	if (pair)
-		safe = min_t(u8, safe, pair->pio_mode - XFER_PIO_0);
-	/*
-	 * Update Command Transfer Mode for master/slave and Data
-	 * Transfer Mode for this drive.
-	 */
-	mask = is_slave ? 0x07f00000 : 0x000007f0;
-	val = ((safe << 8) | (pio << 4)) << (is_slave ? 16 : 0);
-	hwif->select_data = (hwif->select_data & ~mask) | val;
-	/* tx4939ide_tf_load_fixup() will set the Sys_Ctl register */
-}
-
-static void tx4939ide_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
-{
-	u32 mask, val;
-	const u8 mode = drive->dma_mode;
-
-	/* Update Data Transfer Mode for this drive. */
-	if (mode >= XFER_UDMA_0)
-		val = mode - XFER_UDMA_0 + 8;
-	else
-		val = mode - XFER_MW_DMA_0 + 5;
-	if (drive->dn) {
-		mask = 0x00f00000;
-		val <<= 20;
-	} else {
-		mask = 0x000000f0;
-		val <<= 4;
-	}
-	hwif->select_data = (hwif->select_data & ~mask) | val;
-	/* tx4939ide_tf_load_fixup() will set the Sys_Ctl register */
-}
-
-static u16 tx4939ide_check_error_ints(ide_hwif_t *hwif)
-{
-	void __iomem *base = TX4939IDE_BASE(hwif);
-	u16 ctl = tx4939ide_readw(base, TX4939IDE_Int_Ctl);
-
-	if (ctl & TX4939IDE_INT_BUSERR) {
-		/* reset FIFO */
-		u16 sysctl = tx4939ide_readw(base, TX4939IDE_Sys_Ctl);
-
-		tx4939ide_writew(sysctl | 0x4000, base, TX4939IDE_Sys_Ctl);
-		/* wait 12GBUSCLK (typ. 60ns @ GBUS200MHz, max 270ns) */
-		ndelay(270);
-		tx4939ide_writew(sysctl, base, TX4939IDE_Sys_Ctl);
-	}
-	if (ctl & (TX4939IDE_INT_ADDRERR |
-		   TX4939IDE_INT_DEVTIMING | TX4939IDE_INT_BUSERR))
-		pr_err("%s: Error interrupt %#x (%s%s%s )\n",
-		       hwif->name, ctl,
-		       ctl & TX4939IDE_INT_ADDRERR ? " Address-Error" : "",
-		       ctl & TX4939IDE_INT_DEVTIMING ? " DEV-Timing" : "",
-		       ctl & TX4939IDE_INT_BUSERR ? " Bus-Error" : "");
-	return ctl;
-}
-
-static void tx4939ide_clear_irq(ide_drive_t *drive)
-{
-	ide_hwif_t *hwif;
-	void __iomem *base;
-	u16 ctl;
-
-	/*
-	 * tx4939ide_dma_test_irq() and tx4939ide_dma_end() do all job
-	 * for DMA case.
-	 */
-	if (drive->waiting_for_dma)
-		return;
-	hwif = drive->hwif;
-	base = TX4939IDE_BASE(hwif);
-	ctl = tx4939ide_check_error_ints(hwif);
-	tx4939ide_writew(ctl, base, TX4939IDE_Int_Ctl);
-}
-
-static u8 tx4939ide_cable_detect(ide_hwif_t *hwif)
-{
-	void __iomem *base = TX4939IDE_BASE(hwif);
-
-	return tx4939ide_readw(base, TX4939IDE_Sys_Ctl) & 0x2000 ?
-		ATA_CBL_PATA40 : ATA_CBL_PATA80;
-}
-
-#ifdef __BIG_ENDIAN
-static void tx4939ide_dma_host_set(ide_drive_t *drive, int on)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	u8 unit = drive->dn;
-	void __iomem *base = TX4939IDE_BASE(hwif);
-	u8 dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
-
-	if (on)
-		dma_stat |= (1 << (5 + unit));
-	else
-		dma_stat &= ~(1 << (5 + unit));
-
-	tx4939ide_writeb(dma_stat, base, TX4939IDE_DMA_Stat);
-}
-#else
-#define tx4939ide_dma_host_set	ide_dma_host_set
-#endif
-
-static u8 tx4939ide_clear_dma_status(void __iomem *base)
-{
-	u8 dma_stat;
-
-	/* read DMA status for INTR & ERROR flags */
-	dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
-	/* clear INTR & ERROR flags */
-	tx4939ide_writeb(dma_stat | ATA_DMA_INTR | ATA_DMA_ERR, base,
-			 TX4939IDE_DMA_Stat);
-	/* recover intmask cleared by writing to bit2 of DMA_Stat */
-	tx4939ide_writew(TX4939IDE_IGNORE_INTS << 8, base, TX4939IDE_Int_Ctl);
-	return dma_stat;
-}
-
-#ifdef __BIG_ENDIAN
-/* custom ide_build_dmatable to handle swapped layout */
-static int tx4939ide_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	u32 *table = (u32 *)hwif->dmatable_cpu;
-	unsigned int count = 0;
-	int i;
-	struct scatterlist *sg;
-
-	for_each_sg(hwif->sg_table, sg, cmd->sg_nents, i) {
-		u32 cur_addr, cur_len, bcount;
-
-		cur_addr = sg_dma_address(sg);
-		cur_len = sg_dma_len(sg);
-
-		/*
-		 * Fill in the DMA table, without crossing any 64kB boundaries.
-		 */
-
-		while (cur_len) {
-			if (count++ >= PRD_ENTRIES)
-				goto use_pio_instead;
-
-			bcount = 0x10000 - (cur_addr & 0xffff);
-			if (bcount > cur_len)
-				bcount = cur_len;
-			/*
-			 * This workaround for zero count seems required.
-			 * (standard ide_build_dmatable does it too)
-			 */
-			if (bcount == 0x10000)
-				bcount = 0x8000;
-			*table++ = bcount & 0xffff;
-			*table++ = cur_addr;
-			cur_addr += bcount;
-			cur_len -= bcount;
-		}
-	}
-
-	if (count) {
-		*(table - 2) |= 0x80000000;
-		return count;
-	}
-
-use_pio_instead:
-	printk(KERN_ERR "%s: %s\n", drive->name,
-		count ? "DMA table too small" : "empty DMA table?");
-
-	return 0; /* revert to PIO for this request */
-}
-#else
-#define tx4939ide_build_dmatable	ide_build_dmatable
-#endif
-
-static int tx4939ide_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	void __iomem *base = TX4939IDE_BASE(hwif);
-	u8 rw = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 0 : ATA_DMA_WR;
-
-	/* fall back to PIO! */
-	if (tx4939ide_build_dmatable(drive, cmd) == 0)
-		return 1;
-
-	/* PRD table */
-	tx4939ide_writel(hwif->dmatable_dma, base, TX4939IDE_PRD_Ptr);
-
-	/* specify r/w */
-	tx4939ide_writeb(rw, base, TX4939IDE_DMA_Cmd);
-
-	/* clear INTR & ERROR flags */
-	tx4939ide_clear_dma_status(base);
-
-	tx4939ide_writew(SECTOR_SIZE / 2, base, drive->dn ?
-			 TX4939IDE_Xfer_Cnt_2 : TX4939IDE_Xfer_Cnt_1);
-
-	tx4939ide_writew(blk_rq_sectors(cmd->rq), base, TX4939IDE_Sec_Cnt);
-
-	return 0;
-}
-
-static int tx4939ide_dma_end(ide_drive_t *drive)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	u8 dma_stat, dma_cmd;
-	void __iomem *base = TX4939IDE_BASE(hwif);
-	u16 ctl = tx4939ide_readw(base, TX4939IDE_Int_Ctl);
-
-	/* get DMA command mode */
-	dma_cmd = tx4939ide_readb(base, TX4939IDE_DMA_Cmd);
-	/* stop DMA */
-	tx4939ide_writeb(dma_cmd & ~ATA_DMA_START, base, TX4939IDE_DMA_Cmd);
-
-	/* read and clear the INTR & ERROR bits */
-	dma_stat = tx4939ide_clear_dma_status(base);
-
-#define CHECK_DMA_MASK (ATA_DMA_ACTIVE | ATA_DMA_ERR | ATA_DMA_INTR)
-
-	/* verify good DMA status */
-	if ((dma_stat & CHECK_DMA_MASK) == 0 &&
-	    (ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST)) ==
-	    (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST))
-		/* INT_IDE lost... bug? */
-		return 0;
-	return ((dma_stat & CHECK_DMA_MASK) !=
-		ATA_DMA_INTR) ? 0x10 | dma_stat : 0;
-}
-
-/* returns 1 if DMA IRQ issued, 0 otherwise */
-static int tx4939ide_dma_test_irq(ide_drive_t *drive)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	void __iomem *base = TX4939IDE_BASE(hwif);
-	u16 ctl, ide_int;
-	u8 dma_stat, stat;
-	int found = 0;
-
-	ctl = tx4939ide_check_error_ints(hwif);
-	ide_int = ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST);
-	switch (ide_int) {
-	case TX4939IDE_INT_HOST:
-		/* On error, XFEREND might not be asserted. */
-		stat = tx4939ide_readb(base, TX4939IDE_AltStat_DevCtl);
-		if ((stat & (ATA_BUSY | ATA_DRQ | ATA_ERR)) == ATA_ERR)
-			found = 1;
-		else
-			/* Wait for XFEREND (Mask HOST and unmask XFEREND) */
-			ctl &= ~TX4939IDE_INT_XFEREND << 8;
-		ctl |= ide_int << 8;
-		break;
-	case TX4939IDE_INT_HOST | TX4939IDE_INT_XFEREND:
-		dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
-		if (!(dma_stat & ATA_DMA_INTR))
-			pr_warn("%s: weird interrupt status. "
-				"DMA_Stat %#02x int_ctl %#04x\n",
-				hwif->name, dma_stat, ctl);
-		found = 1;
-		break;
-	}
-	/*
-	 * Do not clear XFEREND, HOST now.  They will be cleared by
-	 * clearing bit2 of DMA_Stat.
-	 */
-	ctl &= ~ide_int;
-	tx4939ide_writew(ctl, base, TX4939IDE_Int_Ctl);
-	return found;
-}
-
-#ifdef __BIG_ENDIAN
-static u8 tx4939ide_dma_sff_read_status(ide_hwif_t *hwif)
-{
-	void __iomem *base = TX4939IDE_BASE(hwif);
-
-	return tx4939ide_readb(base, TX4939IDE_DMA_Stat);
-}
-#else
-#define tx4939ide_dma_sff_read_status ide_dma_sff_read_status
-#endif
-
-static void tx4939ide_init_hwif(ide_hwif_t *hwif)
-{
-	void __iomem *base = TX4939IDE_BASE(hwif);
-
-	/* Soft Reset */
-	tx4939ide_writew(0x8000, base, TX4939IDE_Sys_Ctl);
-	/* at least 20 GBUSCLK (typ. 100ns @ GBUS200MHz, max 450ns) */
-	ndelay(450);
-	tx4939ide_writew(0x0000, base, TX4939IDE_Sys_Ctl);
-	/* mask some interrupts and clear all interrupts */
-	tx4939ide_writew((TX4939IDE_IGNORE_INTS << 8) | 0xff, base,
-			 TX4939IDE_Int_Ctl);
-
-	tx4939ide_writew(0x0008, base, TX4939IDE_Lo_Burst_Cnt);
-	tx4939ide_writew(0, base, TX4939IDE_Up_Burst_Cnt);
-}
-
-static int tx4939ide_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
-{
-	hwif->dma_base =
-		hwif->extra_base + tx4939ide_swizzleb(TX4939IDE_DMA_Cmd);
-	/*
-	 * Note that we cannot use ATA_DMA_TABLE_OFS, ATA_DMA_STATUS
-	 * for big endian.
-	 */
-	return ide_allocate_dma_engine(hwif);
-}
-
-static void tx4939ide_tf_load_fixup(ide_drive_t *drive)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	void __iomem *base = TX4939IDE_BASE(hwif);
-	u16 sysctl = hwif->select_data >> (drive->dn ? 16 : 0);
-
-	/*
-	 * Fix ATA100 CORE System Control Register. (The write to the
-	 * Device/Head register may write wrong data to the System
-	 * Control Register)
-	 * While Sys_Ctl is written here, dev_select() is not needed.
-	 */
-	tx4939ide_writew(sysctl, base, TX4939IDE_Sys_Ctl);
-}
-
-static void tx4939ide_tf_load(ide_drive_t *drive, struct ide_taskfile *tf,
-			      u8 valid)
-{
-	ide_tf_load(drive, tf, valid);
-
-	if (valid & IDE_VALID_DEVICE)
-		tx4939ide_tf_load_fixup(drive);
-}
-
-#ifdef __BIG_ENDIAN
-
-/* custom iops (independent from SWAP_IO_SPACE) */
-static void tx4939ide_input_data_swap(ide_drive_t *drive, struct ide_cmd *cmd,
-				void *buf, unsigned int len)
-{
-	unsigned long port = drive->hwif->io_ports.data_addr;
-	unsigned short *ptr = buf;
-	unsigned int count = (len + 1) / 2;
-
-	while (count--)
-		*ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port));
-	__ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
-}
-
-static void tx4939ide_output_data_swap(ide_drive_t *drive, struct ide_cmd *cmd,
-				void *buf, unsigned int len)
-{
-	unsigned long port = drive->hwif->io_ports.data_addr;
-	unsigned short *ptr = buf;
-	unsigned int count = (len + 1) / 2;
-
-	while (count--) {
-		__raw_writew(le16_to_cpu(*ptr), (void __iomem *)port);
-		ptr++;
-	}
-	__ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
-}
-
-static const struct ide_tp_ops tx4939ide_tp_ops = {
-	.exec_command		= ide_exec_command,
-	.read_status		= ide_read_status,
-	.read_altstatus		= ide_read_altstatus,
-	.write_devctl		= ide_write_devctl,
-
-	.dev_select		= ide_dev_select,
-	.tf_load		= tx4939ide_tf_load,
-	.tf_read		= ide_tf_read,
-
-	.input_data		= tx4939ide_input_data_swap,
-	.output_data		= tx4939ide_output_data_swap,
-};
-
-#else	/* __LITTLE_ENDIAN */
-
-static const struct ide_tp_ops tx4939ide_tp_ops = {
-	.exec_command		= ide_exec_command,
-	.read_status		= ide_read_status,
-	.read_altstatus		= ide_read_altstatus,
-	.write_devctl		= ide_write_devctl,
-
-	.dev_select		= ide_dev_select,
-	.tf_load		= tx4939ide_tf_load,
-	.tf_read		= ide_tf_read,
-
-	.input_data		= ide_input_data,
-	.output_data		= ide_output_data,
-};
-
-#endif	/* __LITTLE_ENDIAN */
-
-static const struct ide_port_ops tx4939ide_port_ops = {
-	.set_pio_mode		= tx4939ide_set_pio_mode,
-	.set_dma_mode		= tx4939ide_set_dma_mode,
-	.clear_irq		= tx4939ide_clear_irq,
-	.cable_detect		= tx4939ide_cable_detect,
-};
-
-static const struct ide_dma_ops tx4939ide_dma_ops = {
-	.dma_host_set		= tx4939ide_dma_host_set,
-	.dma_setup		= tx4939ide_dma_setup,
-	.dma_start		= ide_dma_start,
-	.dma_end		= tx4939ide_dma_end,
-	.dma_test_irq		= tx4939ide_dma_test_irq,
-	.dma_lost_irq		= ide_dma_lost_irq,
-	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
-	.dma_sff_read_status	= tx4939ide_dma_sff_read_status,
-};
-
-static const struct ide_port_info tx4939ide_port_info __initconst = {
-	.init_hwif		= tx4939ide_init_hwif,
-	.init_dma		= tx4939ide_init_dma,
-	.port_ops		= &tx4939ide_port_ops,
-	.dma_ops		= &tx4939ide_dma_ops,
-	.tp_ops			= &tx4939ide_tp_ops,
-	.host_flags		= IDE_HFLAG_MMIO,
-	.pio_mask		= ATA_PIO4,
-	.mwdma_mask		= ATA_MWDMA2,
-	.udma_mask		= ATA_UDMA5,
-	.chipset		= ide_generic,
-};
-
-static int __init tx4939ide_probe(struct platform_device *pdev)
-{
-	struct ide_hw hw, *hws[] = { &hw };
-	struct ide_host *host;
-	struct resource *res;
-	int irq, ret;
-	unsigned long mapbase;
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return -ENODEV;
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENODEV;
-
-	if (!devm_request_mem_region(&pdev->dev, res->start,
-				     resource_size(res), MODNAME))
-		return -EBUSY;
-	mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start,
-					      resource_size(res));
-	if (!mapbase)
-		return -EBUSY;
-	memset(&hw, 0, sizeof(hw));
-	hw.io_ports.data_addr =
-		mapbase + tx4939ide_swizzlew(TX4939IDE_Data);
-	hw.io_ports.error_addr =
-		mapbase + tx4939ide_swizzleb(TX4939IDE_Error_Feature);
-	hw.io_ports.nsect_addr =
-		mapbase + tx4939ide_swizzleb(TX4939IDE_Sec);
-	hw.io_ports.lbal_addr =
-		mapbase + tx4939ide_swizzleb(TX4939IDE_LBA0);
-	hw.io_ports.lbam_addr =
-		mapbase + tx4939ide_swizzleb(TX4939IDE_LBA1);
-	hw.io_ports.lbah_addr =
-		mapbase + tx4939ide_swizzleb(TX4939IDE_LBA2);
-	hw.io_ports.device_addr =
-		mapbase + tx4939ide_swizzleb(TX4939IDE_DevHead);
-	hw.io_ports.command_addr =
-		mapbase + tx4939ide_swizzleb(TX4939IDE_Stat_Cmd);
-	hw.io_ports.ctl_addr =
-		mapbase + tx4939ide_swizzleb(TX4939IDE_AltStat_DevCtl);
-	hw.irq = irq;
-	hw.dev = &pdev->dev;
-
-	pr_info("TX4939 IDE interface (base %#lx, irq %d)\n", mapbase, irq);
-	host = ide_host_alloc(&tx4939ide_port_info, hws, 1);
-	if (!host)
-		return -ENOMEM;
-	/* use extra_base for base address of the all registers */
-	host->ports[0]->extra_base = mapbase;
-	ret = ide_host_register(host, &tx4939ide_port_info, hws);
-	if (ret) {
-		ide_host_free(host);
-		return ret;
-	}
-	platform_set_drvdata(pdev, host);
-	return 0;
-}
-
-static int __exit tx4939ide_remove(struct platform_device *pdev)
-{
-	struct ide_host *host = platform_get_drvdata(pdev);
-
-	ide_host_remove(host);
-	return 0;
-}
-
-#ifdef CONFIG_PM
-static int tx4939ide_resume(struct platform_device *dev)
-{
-	struct ide_host *host = platform_get_drvdata(dev);
-	ide_hwif_t *hwif = host->ports[0];
-
-	tx4939ide_init_hwif(hwif);
-	return 0;
-}
-#else
-#define tx4939ide_resume	NULL
-#endif
-
-static struct platform_driver tx4939ide_driver = {
-	.driver = {
-		.name = MODNAME,
-	},
-	.remove = __exit_p(tx4939ide_remove),
-	.resume = tx4939ide_resume,
-};
-
-module_platform_driver_probe(tx4939ide_driver, tx4939ide_probe);
-
-MODULE_DESCRIPTION("TX4939 internal IDE driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:tx4939ide");