[Blackfin removal] [PATCH 19/28] ata: Remove Blackfin PATA support

[Aaron Wu <aaron.wu@analog.com>]

Signed-off-by: Aaron Wu <aaron.wu@analog.com>

Remove Blackfin PATA support
---
 drivers/ata/Kconfig      |    9 -
 drivers/ata/Makefile     |    1 -
 drivers/ata/pata_bf54x.c | 1703 ----------------------------------------------
 3 files changed, 1713 deletions(-)
 delete mode 100644 drivers/ata/pata_bf54x.c

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index a7120d6..4582fa2 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -549,15 +549,6 @@ config PATA_ATP867X
 
 	  If unsure, say N.
 
-config PATA_BF54X
-	tristate "Blackfin 54x ATAPI support"
-	depends on BF542 || BF548 || BF549
-	help
-	  This option enables support for the built-in ATAPI controller on
-	  Blackfin 54x family chips.
-
-	  If unsure, say N.
-
 config PATA_BK3710
 	tristate "Palmchip BK3710 PATA support"
 	depends on ARCH_DAVINCI
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index f1f5a3f..6dae8c9 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -53,7 +53,6 @@ obj-$(CONFIG_PATA_AMD)		+= pata_amd.o
 obj-$(CONFIG_PATA_ARTOP)	+= pata_artop.o
 obj-$(CONFIG_PATA_ATIIXP)	+= pata_atiixp.o
 obj-$(CONFIG_PATA_ATP867X)	+= pata_atp867x.o
-obj-$(CONFIG_PATA_BF54X)	+= pata_bf54x.o
 obj-$(CONFIG_PATA_BK3710)	+= pata_bk3710.o
 obj-$(CONFIG_PATA_CMD64X)	+= pata_cmd64x.o
 obj-$(CONFIG_PATA_CS5520)	+= pata_cs5520.o
diff --git a/drivers/ata/pata_bf54x.c b/drivers/ata/pata_bf54x.c
deleted file mode 100644
index 0e55a8d..0000000
--- a/drivers/ata/pata_bf54x.c
+++ /dev/null
@@ -1,1703 +0,0 @@
-/*
- * File:         drivers/ata/pata_bf54x.c
- * Author:       Sonic Zhang <sonic.zhang@analog.com>
- *
- * Created:
- * Description:  PATA Driver for blackfin 54x
- *
- * Modified:
- *               Copyright 2007 Analog Devices Inc.
- *
- * Bugs:         Enter bugs at http://blackfin.uclinux.org/
- *
- * 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, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/blkdev.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <scsi/scsi_host.h>
-#include <linux/libata.h>
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <asm/dma.h>
-#include <asm/portmux.h>
-
-#define DRV_NAME		"pata-bf54x"
-#define DRV_VERSION		"0.9"
-
-#define ATA_REG_CTRL		0x0E
-#define ATA_REG_ALTSTATUS	ATA_REG_CTRL
-
-/* These are the offset of the controller's registers */
-#define ATAPI_OFFSET_CONTROL		0x00
-#define ATAPI_OFFSET_STATUS		0x04
-#define ATAPI_OFFSET_DEV_ADDR		0x08
-#define ATAPI_OFFSET_DEV_TXBUF		0x0c
-#define ATAPI_OFFSET_DEV_RXBUF		0x10
-#define ATAPI_OFFSET_INT_MASK		0x14
-#define ATAPI_OFFSET_INT_STATUS		0x18
-#define ATAPI_OFFSET_XFER_LEN		0x1c
-#define ATAPI_OFFSET_LINE_STATUS	0x20
-#define ATAPI_OFFSET_SM_STATE		0x24
-#define ATAPI_OFFSET_TERMINATE		0x28
-#define ATAPI_OFFSET_PIO_TFRCNT		0x2c
-#define ATAPI_OFFSET_DMA_TFRCNT		0x30
-#define ATAPI_OFFSET_UMAIN_TFRCNT	0x34
-#define ATAPI_OFFSET_UDMAOUT_TFRCNT	0x38
-#define ATAPI_OFFSET_REG_TIM_0		0x40
-#define ATAPI_OFFSET_PIO_TIM_0		0x44
-#define ATAPI_OFFSET_PIO_TIM_1		0x48
-#define ATAPI_OFFSET_MULTI_TIM_0	0x50
-#define ATAPI_OFFSET_MULTI_TIM_1	0x54
-#define ATAPI_OFFSET_MULTI_TIM_2	0x58
-#define ATAPI_OFFSET_ULTRA_TIM_0	0x60
-#define ATAPI_OFFSET_ULTRA_TIM_1	0x64
-#define ATAPI_OFFSET_ULTRA_TIM_2	0x68
-#define ATAPI_OFFSET_ULTRA_TIM_3	0x6c
-
-
-#define ATAPI_GET_CONTROL(base)\
-	bfin_read16(base + ATAPI_OFFSET_CONTROL)
-#define ATAPI_SET_CONTROL(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_CONTROL, val)
-#define ATAPI_GET_STATUS(base)\
-	bfin_read16(base + ATAPI_OFFSET_STATUS)
-#define ATAPI_GET_DEV_ADDR(base)\
-	bfin_read16(base + ATAPI_OFFSET_DEV_ADDR)
-#define ATAPI_SET_DEV_ADDR(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_DEV_ADDR, val)
-#define ATAPI_GET_DEV_TXBUF(base)\
-	bfin_read16(base + ATAPI_OFFSET_DEV_TXBUF)
-#define ATAPI_SET_DEV_TXBUF(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_DEV_TXBUF, val)
-#define ATAPI_GET_DEV_RXBUF(base)\
-	bfin_read16(base + ATAPI_OFFSET_DEV_RXBUF)
-#define ATAPI_SET_DEV_RXBUF(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_DEV_RXBUF, val)
-#define ATAPI_GET_INT_MASK(base)\
-	bfin_read16(base + ATAPI_OFFSET_INT_MASK)
-#define ATAPI_SET_INT_MASK(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_INT_MASK, val)
-#define ATAPI_GET_INT_STATUS(base)\
-	bfin_read16(base + ATAPI_OFFSET_INT_STATUS)
-#define ATAPI_SET_INT_STATUS(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_INT_STATUS, val)
-#define ATAPI_GET_XFER_LEN(base)\
-	bfin_read16(base + ATAPI_OFFSET_XFER_LEN)
-#define ATAPI_SET_XFER_LEN(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_XFER_LEN, val)
-#define ATAPI_GET_LINE_STATUS(base)\
-	bfin_read16(base + ATAPI_OFFSET_LINE_STATUS)
-#define ATAPI_GET_SM_STATE(base)\
-	bfin_read16(base + ATAPI_OFFSET_SM_STATE)
-#define ATAPI_GET_TERMINATE(base)\
-	bfin_read16(base + ATAPI_OFFSET_TERMINATE)
-#define ATAPI_SET_TERMINATE(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_TERMINATE, val)
-#define ATAPI_GET_PIO_TFRCNT(base)\
-	bfin_read16(base + ATAPI_OFFSET_PIO_TFRCNT)
-#define ATAPI_GET_DMA_TFRCNT(base)\
-	bfin_read16(base + ATAPI_OFFSET_DMA_TFRCNT)
-#define ATAPI_GET_UMAIN_TFRCNT(base)\
-	bfin_read16(base + ATAPI_OFFSET_UMAIN_TFRCNT)
-#define ATAPI_GET_UDMAOUT_TFRCNT(base)\
-	bfin_read16(base + ATAPI_OFFSET_UDMAOUT_TFRCNT)
-#define ATAPI_GET_REG_TIM_0(base)\
-	bfin_read16(base + ATAPI_OFFSET_REG_TIM_0)
-#define ATAPI_SET_REG_TIM_0(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_REG_TIM_0, val)
-#define ATAPI_GET_PIO_TIM_0(base)\
-	bfin_read16(base + ATAPI_OFFSET_PIO_TIM_0)
-#define ATAPI_SET_PIO_TIM_0(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_PIO_TIM_0, val)
-#define ATAPI_GET_PIO_TIM_1(base)\
-	bfin_read16(base + ATAPI_OFFSET_PIO_TIM_1)
-#define ATAPI_SET_PIO_TIM_1(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_PIO_TIM_1, val)
-#define ATAPI_GET_MULTI_TIM_0(base)\
-	bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_0)
-#define ATAPI_SET_MULTI_TIM_0(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_0, val)
-#define ATAPI_GET_MULTI_TIM_1(base)\
-	bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_1)
-#define ATAPI_SET_MULTI_TIM_1(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_1, val)
-#define ATAPI_GET_MULTI_TIM_2(base)\
-	bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_2)
-#define ATAPI_SET_MULTI_TIM_2(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_2, val)
-#define ATAPI_GET_ULTRA_TIM_0(base)\
-	bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_0)
-#define ATAPI_SET_ULTRA_TIM_0(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_0, val)
-#define ATAPI_GET_ULTRA_TIM_1(base)\
-	bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_1)
-#define ATAPI_SET_ULTRA_TIM_1(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_1, val)
-#define ATAPI_GET_ULTRA_TIM_2(base)\
-	bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_2)
-#define ATAPI_SET_ULTRA_TIM_2(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_2, val)
-#define ATAPI_GET_ULTRA_TIM_3(base)\
-	bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_3)
-#define ATAPI_SET_ULTRA_TIM_3(base, val)\
-	bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_3, val)
-
-/**
- * PIO Mode - Frequency compatibility
- */
-/* mode: 0         1         2         3         4 */
-static const u32 pio_fsclk[] =
-{ 33333333, 33333333, 33333333, 33333333, 33333333 };
-
-/**
- * MDMA Mode - Frequency compatibility
- */
-/*               mode:      0         1         2        */
-static const u32 mdma_fsclk[] = { 33333333, 33333333, 33333333 };
-
-/**
- * UDMA Mode - Frequency compatibility
- *
- * UDMA5 - 100 MB/s   - SCLK  = 133 MHz
- * UDMA4 - 66 MB/s    - SCLK >=  80 MHz
- * UDMA3 - 44.4 MB/s  - SCLK >=  50 MHz
- * UDMA2 - 33 MB/s    - SCLK >=  40 MHz
- */
-/* mode: 0         1         2         3         4          5 */
-static const u32 udma_fsclk[] =
-{ 33333333, 33333333, 40000000, 50000000, 80000000, 133333333 };
-
-/**
- * Register transfer timing table
- */
-/*               mode:       0    1    2    3    4    */
-/* Cycle Time                     */
-static const u32 reg_t0min[]   = { 600, 383, 330, 180, 120 };
-/* DIOR/DIOW to end cycle         */
-static const u32 reg_t2min[]   = { 290, 290, 290, 70,  25  };
-/* DIOR/DIOW asserted pulse width */
-static const u32 reg_teocmin[] = { 290, 290, 290, 80,  70  };
-
-/**
- * PIO timing table
- */
-/*               mode:       0    1    2    3    4    */
-/* Cycle Time                     */
-static const u32 pio_t0min[]   = { 600, 383, 240, 180, 120 };
-/* Address valid to DIOR/DIORW    */
-static const u32 pio_t1min[]   = { 70,  50,  30,  30,  25  };
-/* DIOR/DIOW to end cycle         */
-static const u32 pio_t2min[]   = { 165, 125, 100, 80,  70  };
-/* DIOR/DIOW asserted pulse width */
-static const u32 pio_teocmin[] = { 165, 125, 100, 70,  25  };
-/* DIOW data hold                 */
-static const u32 pio_t4min[]   = { 30,  20,  15,  10,  10  };
-
-/* ******************************************************************
- * Multiword DMA timing table
- * ******************************************************************
- */
-/*               mode:       0   1    2        */
-/* Cycle Time                     */
-static const u32 mdma_t0min[]  = { 480, 150, 120 };
-/* DIOR/DIOW asserted pulse width */
-static const u32 mdma_tdmin[]  = { 215, 80,  70  };
-/* DMACK to read data released    */
-static const u32 mdma_thmin[]  = { 20,  15,  10  };
-/* DIOR/DIOW to DMACK hold        */
-static const u32 mdma_tjmin[]  = { 20,  5,   5   };
-/* DIOR negated pulse width       */
-static const u32 mdma_tkrmin[] = { 50,  50,  25  };
-/* DIOR negated pulse width       */
-static const u32 mdma_tkwmin[] = { 215, 50,  25  };
-/* CS[1:0] valid to DIOR/DIOW     */
-static const u32 mdma_tmmin[]  = { 50,  30,  25  };
-/* DMACK to read data released    */
-static const u32 mdma_tzmax[]  = { 20,  25,  25  };
-
-/**
- * Ultra DMA timing table
- */
-/*               mode:         0    1    2    3    4    5       */
-static const u32 udma_tcycmin[]  = { 112, 73,  54,  39,  25,  17 };
-static const u32 udma_tdvsmin[]  = { 70,  48,  31,  20,  7,   5  };
-static const u32 udma_tenvmax[]  = { 70,  70,  70,  55,  55,  50 };
-static const u32 udma_trpmin[]   = { 160, 125, 100, 100, 100, 85 };
-static const u32 udma_tmin[]     = { 5,   5,   5,   5,   3,   3  };
-
-
-static const u32 udma_tmlimin = 20;
-static const u32 udma_tzahmin = 20;
-static const u32 udma_tenvmin = 20;
-static const u32 udma_tackmin = 20;
-static const u32 udma_tssmin = 50;
-
-#define BFIN_MAX_SG_SEGMENTS 4
-
-/**
- *
- *	Function:       num_clocks_min
- *
- *	Description:
- *	calculate number of SCLK cycles to meet minimum timing
- */
-static unsigned short num_clocks_min(unsigned long tmin,
-				unsigned long fsclk)
-{
-	unsigned long tmp ;
-	unsigned short result;
-
-	tmp = tmin * (fsclk/1000/1000) / 1000;
-	result = (unsigned short)tmp;
-	if ((tmp*1000*1000) < (tmin*(fsclk/1000))) {
-		result++;
-	}
-
-	return result;
-}
-
-/**
- *	bfin_set_piomode - Initialize host controller PATA PIO timings
- *	@ap: Port whose timings we are configuring
- *	@adev: um
- *
- *	Set PIO mode for device.
- *
- *	LOCKING:
- *	None (inherited from caller).
- */
-
-static void bfin_set_piomode(struct ata_port *ap, struct ata_device *adev)
-{
-	int mode = adev->pio_mode - XFER_PIO_0;
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-	unsigned int fsclk = get_sclk();
-	unsigned short teoc_reg, t2_reg, teoc_pio;
-	unsigned short t4_reg, t2_pio, t1_reg;
-	unsigned short n0, n6, t6min = 5;
-
-	/* the most restrictive timing value is t6 and tc, the DIOW - data hold
-	* If one SCLK pulse is longer than this minimum value then register
-	* transfers cannot be supported at this frequency.
-	*/
-	n6 = num_clocks_min(t6min, fsclk);
-	if (mode >= 0 && mode <= 4 && n6 >= 1) {
-		dev_dbg(adev->link->ap->dev, "set piomode: mode=%d, fsclk=%ud\n", mode, fsclk);
-		/* calculate the timing values for register transfers. */
-		while (mode > 0 && pio_fsclk[mode] > fsclk)
-			mode--;
-
-		/* DIOR/DIOW to end cycle time */
-		t2_reg = num_clocks_min(reg_t2min[mode], fsclk);
-		/* DIOR/DIOW asserted pulse width */
-		teoc_reg = num_clocks_min(reg_teocmin[mode], fsclk);
-		/* Cycle Time */
-		n0  = num_clocks_min(reg_t0min[mode], fsclk);
-
-		/* increase t2 until we meed the minimum cycle length */
-		if (t2_reg + teoc_reg < n0)
-			t2_reg = n0 - teoc_reg;
-
-		/* calculate the timing values for pio transfers. */
-
-		/* DIOR/DIOW to end cycle time */
-		t2_pio = num_clocks_min(pio_t2min[mode], fsclk);
-		/* DIOR/DIOW asserted pulse width */
-		teoc_pio = num_clocks_min(pio_teocmin[mode], fsclk);
-		/* Cycle Time */
-		n0  = num_clocks_min(pio_t0min[mode], fsclk);
-
-		/* increase t2 until we meed the minimum cycle length */
-		if (t2_pio + teoc_pio < n0)
-			t2_pio = n0 - teoc_pio;
-
-		/* Address valid to DIOR/DIORW */
-		t1_reg = num_clocks_min(pio_t1min[mode], fsclk);
-
-		/* DIOW data hold */
-		t4_reg = num_clocks_min(pio_t4min[mode], fsclk);
-
-		ATAPI_SET_REG_TIM_0(base, (teoc_reg<<8 | t2_reg));
-		ATAPI_SET_PIO_TIM_0(base, (t4_reg<<12 | t2_pio<<4 | t1_reg));
-		ATAPI_SET_PIO_TIM_1(base, teoc_pio);
-		if (mode > 2) {
-			ATAPI_SET_CONTROL(base,
-				ATAPI_GET_CONTROL(base) | IORDY_EN);
-		} else {
-			ATAPI_SET_CONTROL(base,
-				ATAPI_GET_CONTROL(base) & ~IORDY_EN);
-		}
-
-		/* Disable host ATAPI PIO interrupts */
-		ATAPI_SET_INT_MASK(base, ATAPI_GET_INT_MASK(base)
-			& ~(PIO_DONE_MASK | HOST_TERM_XFER_MASK));
-		SSYNC();
-	}
-}
-
-/**
- *	bfin_set_dmamode - Initialize host controller PATA DMA timings
- *	@ap: Port whose timings we are configuring
- *	@adev: um
- *
- *	Set UDMA mode for device.
- *
- *	LOCKING:
- *	None (inherited from caller).
- */
-
-static void bfin_set_dmamode(struct ata_port *ap, struct ata_device *adev)
-{
-	int mode;
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-	unsigned long fsclk = get_sclk();
-	unsigned short tenv, tack, tcyc_tdvs, tdvs, tmli, tss, trp, tzah;
-	unsigned short tm, td, tkr, tkw, teoc, th;
-	unsigned short n0, nf, tfmin = 5;
-	unsigned short nmin, tcyc;
-
-	mode = adev->dma_mode - XFER_UDMA_0;
-	if (mode >= 0 && mode <= 5) {
-		dev_dbg(adev->link->ap->dev, "set udmamode: mode=%d\n", mode);
-		/* the most restrictive timing value is t6 and tc,
-		 * the DIOW - data hold. If one SCLK pulse is longer
-		 * than this minimum value then register
-		 * transfers cannot be supported at this frequency.
-		 */
-		while (mode > 0 && udma_fsclk[mode] > fsclk)
-			mode--;
-
-		nmin = num_clocks_min(udma_tmin[mode], fsclk);
-		if (nmin >= 1) {
-			/* calculate the timing values for Ultra DMA. */
-			tdvs = num_clocks_min(udma_tdvsmin[mode], fsclk);
-			tcyc = num_clocks_min(udma_tcycmin[mode], fsclk);
-			tcyc_tdvs = 2;
-
-			/* increase tcyc - tdvs (tcyc_tdvs) until we meed
-			 * the minimum cycle length
-			 */
-			if (tdvs + tcyc_tdvs < tcyc)
-				tcyc_tdvs = tcyc - tdvs;
-
-			/* Mow assign the values required for the timing
-			 * registers
-			 */
-			if (tcyc_tdvs < 2)
-				tcyc_tdvs = 2;
-
-			if (tdvs < 2)
-				tdvs = 2;
-
-			tack = num_clocks_min(udma_tackmin, fsclk);
-			tss = num_clocks_min(udma_tssmin, fsclk);
-			tmli = num_clocks_min(udma_tmlimin, fsclk);
-			tzah = num_clocks_min(udma_tzahmin, fsclk);
-			trp = num_clocks_min(udma_trpmin[mode], fsclk);
-			tenv = num_clocks_min(udma_tenvmin, fsclk);
-			if (tenv <= udma_tenvmax[mode]) {
-				ATAPI_SET_ULTRA_TIM_0(base, (tenv<<8 | tack));
-				ATAPI_SET_ULTRA_TIM_1(base,
-					(tcyc_tdvs<<8 | tdvs));
-				ATAPI_SET_ULTRA_TIM_2(base, (tmli<<8 | tss));
-				ATAPI_SET_ULTRA_TIM_3(base, (trp<<8 | tzah));
-			}
-		}
-	}
-
-	mode = adev->dma_mode - XFER_MW_DMA_0;
-	if (mode >= 0 && mode <= 2) {
-		dev_dbg(adev->link->ap->dev, "set mdmamode: mode=%d\n", mode);
-		/* the most restrictive timing value is tf, the DMACK to
-		 * read data released. If one SCLK pulse is longer than
-		 * this maximum value then the MDMA mode
-		 * cannot be supported at this frequency.
-		 */
-		while (mode > 0 && mdma_fsclk[mode] > fsclk)
-			mode--;
-
-		nf = num_clocks_min(tfmin, fsclk);
-		if (nf >= 1) {
-			/* calculate the timing values for Multi-word DMA. */
-
-			/* DIOR/DIOW asserted pulse width */
-			td = num_clocks_min(mdma_tdmin[mode], fsclk);
-
-			/* DIOR negated pulse width */
-			tkw = num_clocks_min(mdma_tkwmin[mode], fsclk);
-
-			/* Cycle Time */
-			n0  = num_clocks_min(mdma_t0min[mode], fsclk);
-
-			/* increase tk until we meed the minimum cycle length */
-			if (tkw + td < n0)
-				tkw = n0 - td;
-
-			/* DIOR negated pulse width - read */
-			tkr = num_clocks_min(mdma_tkrmin[mode], fsclk);
-			/* CS{1:0] valid to DIOR/DIOW */
-			tm = num_clocks_min(mdma_tmmin[mode], fsclk);
-			/* DIOR/DIOW to DMACK hold */
-			teoc = num_clocks_min(mdma_tjmin[mode], fsclk);
-			/* DIOW Data hold */
-			th = num_clocks_min(mdma_thmin[mode], fsclk);
-
-			ATAPI_SET_MULTI_TIM_0(base, (tm<<8 | td));
-			ATAPI_SET_MULTI_TIM_1(base, (tkr<<8 | tkw));
-			ATAPI_SET_MULTI_TIM_2(base, (teoc<<8 | th));
-			SSYNC();
-		}
-	}
-	return;
-}
-
-/**
- *
- *    Function:       wait_complete
- *
- *    Description:    Waits the interrupt from device
- *
- */
-static inline void wait_complete(void __iomem *base, unsigned short mask)
-{
-	unsigned short status;
-	unsigned int i = 0;
-
-#define PATA_BF54X_WAIT_TIMEOUT		10000
-
-	for (i = 0; i < PATA_BF54X_WAIT_TIMEOUT; i++) {
-		status = ATAPI_GET_INT_STATUS(base) & mask;
-		if (status)
-			break;
-	}
-
-	ATAPI_SET_INT_STATUS(base, mask);
-}
-
-/**
- *
- *    Function:       write_atapi_register
- *
- *    Description:    Writes to ATA Device Resgister
- *
- */
-
-static void write_atapi_register(void __iomem *base,
-		unsigned long ata_reg, unsigned short value)
-{
-	/* Program the ATA_DEV_TXBUF register with write data (to be
-	 * written into the device).
-	 */
-	ATAPI_SET_DEV_TXBUF(base, value);
-
-	/* Program the ATA_DEV_ADDR register with address of the
-	 * device register (0x01 to 0x0F).
-	 */
-	ATAPI_SET_DEV_ADDR(base, ata_reg);
-
-	/* Program the ATA_CTRL register with dir set to write (1)
-	 */
-	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | XFER_DIR));
-
-	/* ensure PIO DMA is not set */
-	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
-
-	/* and start the transfer */
-	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
-
-	/* Wait for the interrupt to indicate the end of the transfer.
-	 * (We need to wait on and clear rhe ATA_DEV_INT interrupt status)
-	 */
-	wait_complete(base, PIO_DONE_INT);
-}
-
-/**
- *
- *	Function:       read_atapi_register
- *
- *Description:    Reads from ATA Device Resgister
- *
- */
-
-static unsigned short read_atapi_register(void __iomem *base,
-		unsigned long ata_reg)
-{
-	/* Program the ATA_DEV_ADDR register with address of the
-	 * device register (0x01 to 0x0F).
-	 */
-	ATAPI_SET_DEV_ADDR(base, ata_reg);
-
-	/* Program the ATA_CTRL register with dir set to read (0) and
-	 */
-	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~XFER_DIR));
-
-	/* ensure PIO DMA is not set */
-	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
-
-	/* and start the transfer */
-	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
-
-	/* Wait for the interrupt to indicate the end of the transfer.
-	 * (PIO_DONE interrupt is set and it doesn't seem to matter
-	 * that we don't clear it)
-	 */
-	wait_complete(base, PIO_DONE_INT);
-
-	/* Read the ATA_DEV_RXBUF register with write data (to be
-	 * written into the device).
-	 */
-	return ATAPI_GET_DEV_RXBUF(base);
-}
-
-/**
- *
- *    Function:       write_atapi_register_data
- *
- *    Description:    Writes to ATA Device Resgister
- *
- */
-
-static void write_atapi_data(void __iomem *base,
-		int len, unsigned short *buf)
-{
-	int i;
-
-	/* Set transfer length to 1 */
-	ATAPI_SET_XFER_LEN(base, 1);
-
-	/* Program the ATA_DEV_ADDR register with address of the
-	 * ATA_REG_DATA
-	 */
-	ATAPI_SET_DEV_ADDR(base, ATA_REG_DATA);
-
-	/* Program the ATA_CTRL register with dir set to write (1)
-	 */
-	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | XFER_DIR));
-
-	/* ensure PIO DMA is not set */
-	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
-
-	for (i = 0; i < len; i++) {
-		/* Program the ATA_DEV_TXBUF register with write data (to be
-		 * written into the device).
-		 */
-		ATAPI_SET_DEV_TXBUF(base, buf[i]);
-
-		/* and start the transfer */
-		ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
-
-		/* Wait for the interrupt to indicate the end of the transfer.
-		 * (We need to wait on and clear rhe ATA_DEV_INT
-		 * interrupt status)
-		 */
-		wait_complete(base, PIO_DONE_INT);
-	}
-}
-
-/**
- *
- *	Function:       read_atapi_register_data
- *
- *	Description:    Reads from ATA Device Resgister
- *
- */
-
-static void read_atapi_data(void __iomem *base,
-		int len, unsigned short *buf)
-{
-	int i;
-
-	/* Set transfer length to 1 */
-	ATAPI_SET_XFER_LEN(base, 1);
-
-	/* Program the ATA_DEV_ADDR register with address of the
-	 * ATA_REG_DATA
-	 */
-	ATAPI_SET_DEV_ADDR(base, ATA_REG_DATA);
-
-	/* Program the ATA_CTRL register with dir set to read (0) and
-	 */
-	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~XFER_DIR));
-
-	/* ensure PIO DMA is not set */
-	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
-
-	for (i = 0; i < len; i++) {
-		/* and start the transfer */
-		ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
-
-		/* Wait for the interrupt to indicate the end of the transfer.
-		 * (PIO_DONE interrupt is set and it doesn't seem to matter
-		 * that we don't clear it)
-		 */
-		wait_complete(base, PIO_DONE_INT);
-
-		/* Read the ATA_DEV_RXBUF register with write data (to be
-		 * written into the device).
-		 */
-		buf[i] = ATAPI_GET_DEV_RXBUF(base);
-	}
-}
-
-/**
- *	bfin_tf_load - send taskfile registers to host controller
- *	@ap: Port to which output is sent
- *	@tf: ATA taskfile register set
- *
- *	Note: Original code is ata_sff_tf_load().
- */
-
-static void bfin_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
-{
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-	unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
-
-	if (tf->ctl != ap->last_ctl) {
-		write_atapi_register(base, ATA_REG_CTRL, tf->ctl);
-		ap->last_ctl = tf->ctl;
-		ata_wait_idle(ap);
-	}
-
-	if (is_addr) {
-		if (tf->flags & ATA_TFLAG_LBA48) {
-			write_atapi_register(base, ATA_REG_FEATURE,
-						tf->hob_feature);
-			write_atapi_register(base, ATA_REG_NSECT,
-						tf->hob_nsect);
-			write_atapi_register(base, ATA_REG_LBAL, tf->hob_lbal);
-			write_atapi_register(base, ATA_REG_LBAM, tf->hob_lbam);
-			write_atapi_register(base, ATA_REG_LBAH, tf->hob_lbah);
-			dev_dbg(ap->dev, "hob: feat 0x%X nsect 0x%X, lba 0x%X "
-				 "0x%X 0x%X\n",
-				tf->hob_feature,
-				tf->hob_nsect,
-				tf->hob_lbal,
-				tf->hob_lbam,
-				tf->hob_lbah);
-		}
-
-		write_atapi_register(base, ATA_REG_FEATURE, tf->feature);
-		write_atapi_register(base, ATA_REG_NSECT, tf->nsect);
-		write_atapi_register(base, ATA_REG_LBAL, tf->lbal);
-		write_atapi_register(base, ATA_REG_LBAM, tf->lbam);
-		write_atapi_register(base, ATA_REG_LBAH, tf->lbah);
-		dev_dbg(ap->dev, "feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
-			tf->feature,
-			tf->nsect,
-			tf->lbal,
-			tf->lbam,
-			tf->lbah);
-	}
-
-	if (tf->flags & ATA_TFLAG_DEVICE) {
-		write_atapi_register(base, ATA_REG_DEVICE, tf->device);
-		dev_dbg(ap->dev, "device 0x%X\n", tf->device);
-	}
-
-	ata_wait_idle(ap);
-}
-
-/**
- *	bfin_check_status - Read device status reg & clear interrupt
- *	@ap: port where the device is
- *
- *	Note: Original code is ata_check_status().
- */
-
-static u8 bfin_check_status(struct ata_port *ap)
-{
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-	return read_atapi_register(base, ATA_REG_STATUS);
-}
-
-/**
- *	bfin_tf_read - input device's ATA taskfile shadow registers
- *	@ap: Port from which input is read
- *	@tf: ATA taskfile register set for storing input
- *
- *	Note: Original code is ata_sff_tf_read().
- */
-
-static void bfin_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
-{
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-
-	tf->command = bfin_check_status(ap);
-	tf->feature = read_atapi_register(base, ATA_REG_ERR);
-	tf->nsect = read_atapi_register(base, ATA_REG_NSECT);
-	tf->lbal = read_atapi_register(base, ATA_REG_LBAL);
-	tf->lbam = read_atapi_register(base, ATA_REG_LBAM);
-	tf->lbah = read_atapi_register(base, ATA_REG_LBAH);
-	tf->device = read_atapi_register(base, ATA_REG_DEVICE);
-
-	if (tf->flags & ATA_TFLAG_LBA48) {
-		write_atapi_register(base, ATA_REG_CTRL, tf->ctl | ATA_HOB);
-		tf->hob_feature = read_atapi_register(base, ATA_REG_ERR);
-		tf->hob_nsect = read_atapi_register(base, ATA_REG_NSECT);
-		tf->hob_lbal = read_atapi_register(base, ATA_REG_LBAL);
-		tf->hob_lbam = read_atapi_register(base, ATA_REG_LBAM);
-		tf->hob_lbah = read_atapi_register(base, ATA_REG_LBAH);
-	}
-}
-
-/**
- *	bfin_exec_command - issue ATA command to host controller
- *	@ap: port to which command is being issued
- *	@tf: ATA taskfile register set
- *
- *	Note: Original code is ata_sff_exec_command().
- */
-
-static void bfin_exec_command(struct ata_port *ap,
-			      const struct ata_taskfile *tf)
-{
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-	dev_dbg(ap->dev, "ata%u: cmd 0x%X\n", ap->print_id, tf->command);
-
-	write_atapi_register(base, ATA_REG_CMD, tf->command);
-	ata_sff_pause(ap);
-}
-
-/**
- *	bfin_check_altstatus - Read device alternate status reg
- *	@ap: port where the device is
- */
-
-static u8 bfin_check_altstatus(struct ata_port *ap)
-{
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-	return read_atapi_register(base, ATA_REG_ALTSTATUS);
-}
-
-/**
- *	bfin_dev_select - Select device 0/1 on ATA bus
- *	@ap: ATA channel to manipulate
- *	@device: ATA device (numbered from zero) to select
- *
- *	Note: Original code is ata_sff_dev_select().
- */
-
-static void bfin_dev_select(struct ata_port *ap, unsigned int device)
-{
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-	u8 tmp;
-
-	if (device == 0)
-		tmp = ATA_DEVICE_OBS;
-	else
-		tmp = ATA_DEVICE_OBS | ATA_DEV1;
-
-	write_atapi_register(base, ATA_REG_DEVICE, tmp);
-	ata_sff_pause(ap);
-}
-
-/**
- *	bfin_set_devctl - Write device control reg
- *	@ap: port where the device is
- *	@ctl: value to write
- */
-
-static void bfin_set_devctl(struct ata_port *ap, u8 ctl)
-{
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-	write_atapi_register(base, ATA_REG_CTRL, ctl);
-}
-
-/**
- *	bfin_bmdma_setup - Set up IDE DMA transaction
- *	@qc: Info associated with this ATA transaction.
- *
- *	Note: Original code is ata_bmdma_setup().
- */
-
-static void bfin_bmdma_setup(struct ata_queued_cmd *qc)
-{
-	struct ata_port *ap = qc->ap;
-	struct dma_desc_array *dma_desc_cpu = (struct dma_desc_array *)ap->bmdma_prd;
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-	unsigned short config = DMAFLOW_ARRAY | NDSIZE_5 | RESTART | WDSIZE_16 | DMAEN;
-	struct scatterlist *sg;
-	unsigned int si;
-	unsigned int channel;
-	unsigned int dir;
-	unsigned int size = 0;
-
-	dev_dbg(qc->ap->dev, "in atapi dma setup\n");
-	/* Program the ATA_CTRL register with dir */
-	if (qc->tf.flags & ATA_TFLAG_WRITE) {
-		channel = CH_ATAPI_TX;
-		dir = DMA_TO_DEVICE;
-	} else {
-		channel = CH_ATAPI_RX;
-		dir = DMA_FROM_DEVICE;
-		config |= WNR;
-	}
-
-	dma_map_sg(ap->dev, qc->sg, qc->n_elem, dir);
-
-	/* fill the ATAPI DMA controller */
-	for_each_sg(qc->sg, sg, qc->n_elem, si) {
-		dma_desc_cpu[si].start_addr = sg_dma_address(sg);
-		dma_desc_cpu[si].cfg = config;
-		dma_desc_cpu[si].x_count = sg_dma_len(sg) >> 1;
-		dma_desc_cpu[si].x_modify = 2;
-		size += sg_dma_len(sg);
-	}
-
-	/* Set the last descriptor to stop mode */
-	dma_desc_cpu[qc->n_elem - 1].cfg &= ~(DMAFLOW | NDSIZE);
-
-	flush_dcache_range((unsigned int)dma_desc_cpu,
-		(unsigned int)dma_desc_cpu +
-			qc->n_elem * sizeof(struct dma_desc_array));
-
-	/* Enable ATA DMA operation*/
-	set_dma_curr_desc_addr(channel, (unsigned long *)ap->bmdma_prd_dma);
-	set_dma_x_count(channel, 0);
-	set_dma_x_modify(channel, 0);
-	set_dma_config(channel, config);
-
-	SSYNC();
-
-	/* Send ATA DMA command */
-	bfin_exec_command(ap, &qc->tf);
-
-	if (qc->tf.flags & ATA_TFLAG_WRITE) {
-		/* set ATA DMA write direction */
-		ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base)
-			| XFER_DIR));
-	} else {
-		/* set ATA DMA read direction */
-		ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base)
-			& ~XFER_DIR));
-	}
-
-	/* Reset all transfer count */
-	ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | TFRCNT_RST);
-
-	/* Set ATAPI state machine contorl in terminate sequence */
-	ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | END_ON_TERM);
-
-	/* Set transfer length to the total size of sg buffers */
-	ATAPI_SET_XFER_LEN(base, size >> 1);
-}
-
-/**
- *	bfin_bmdma_start - Start an IDE DMA transaction
- *	@qc: Info associated with this ATA transaction.
- *
- *	Note: Original code is ata_bmdma_start().
- */
-
-static void bfin_bmdma_start(struct ata_queued_cmd *qc)
-{
-	struct ata_port *ap = qc->ap;
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-
-	dev_dbg(qc->ap->dev, "in atapi dma start\n");
-
-	if (!(ap->udma_mask || ap->mwdma_mask))
-		return;
-
-	/* start ATAPI transfer*/
-	if (ap->udma_mask)
-		ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base)
-			| ULTRA_START);
-	else
-		ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base)
-			| MULTI_START);
-}
-
-/**
- *	bfin_bmdma_stop - Stop IDE DMA transfer
- *	@qc: Command we are ending DMA for
- */
-
-static void bfin_bmdma_stop(struct ata_queued_cmd *qc)
-{
-	struct ata_port *ap = qc->ap;
-	unsigned int dir;
-
-	dev_dbg(qc->ap->dev, "in atapi dma stop\n");
-
-	if (!(ap->udma_mask || ap->mwdma_mask))
-		return;
-
-	/* stop ATAPI DMA controller*/
-	if (qc->tf.flags & ATA_TFLAG_WRITE) {
-		dir = DMA_TO_DEVICE;
-		disable_dma(CH_ATAPI_TX);
-	} else {
-		dir = DMA_FROM_DEVICE;
-		disable_dma(CH_ATAPI_RX);
-	}
-
-	dma_unmap_sg(ap->dev, qc->sg, qc->n_elem, dir);
-}
-
-/**
- *	bfin_devchk - PATA device presence detection
- *	@ap: ATA channel to examine
- *	@device: Device to examine (starting at zero)
- *
- *	Note: Original code is ata_devchk().
- */
-
-static unsigned int bfin_devchk(struct ata_port *ap,
-				unsigned int device)
-{
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-	u8 nsect, lbal;
-
-	bfin_dev_select(ap, device);
-
-	write_atapi_register(base, ATA_REG_NSECT, 0x55);
-	write_atapi_register(base, ATA_REG_LBAL, 0xaa);
-
-	write_atapi_register(base, ATA_REG_NSECT, 0xaa);
-	write_atapi_register(base, ATA_REG_LBAL, 0x55);
-
-	write_atapi_register(base, ATA_REG_NSECT, 0x55);
-	write_atapi_register(base, ATA_REG_LBAL, 0xaa);
-
-	nsect = read_atapi_register(base, ATA_REG_NSECT);
-	lbal = read_atapi_register(base, ATA_REG_LBAL);
-
-	if ((nsect == 0x55) && (lbal == 0xaa))
-		return 1;	/* we found a device */
-
-	return 0;		/* nothing found */
-}
-
-/**
- *	bfin_bus_post_reset - PATA device post reset
- *
- *	Note: Original code is ata_bus_post_reset().
- */
-
-static void bfin_bus_post_reset(struct ata_port *ap, unsigned int devmask)
-{
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-	unsigned int dev0 = devmask & (1 << 0);
-	unsigned int dev1 = devmask & (1 << 1);
-	unsigned long deadline;
-
-	/* if device 0 was found in ata_devchk, wait for its
-	 * BSY bit to clear
-	 */
-	if (dev0)
-		ata_sff_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
-
-	/* if device 1 was found in ata_devchk, wait for
-	 * register access, then wait for BSY to clear
-	 */
-	deadline = ata_deadline(jiffies, ATA_TMOUT_BOOT);
-	while (dev1) {
-		u8 nsect, lbal;
-
-		bfin_dev_select(ap, 1);
-		nsect = read_atapi_register(base, ATA_REG_NSECT);
-		lbal = read_atapi_register(base, ATA_REG_LBAL);
-		if ((nsect == 1) && (lbal == 1))
-			break;
-		if (time_after(jiffies, deadline)) {
-			dev1 = 0;
-			break;
-		}
-		ata_msleep(ap, 50);	/* give drive a breather */
-	}
-	if (dev1)
-		ata_sff_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
-
-	/* is all this really necessary? */
-	bfin_dev_select(ap, 0);
-	if (dev1)
-		bfin_dev_select(ap, 1);
-	if (dev0)
-		bfin_dev_select(ap, 0);
-}
-
-/**
- *	bfin_bus_softreset - PATA device software reset
- *
- *	Note: Original code is ata_bus_softreset().
- */
-
-static unsigned int bfin_bus_softreset(struct ata_port *ap,
-				       unsigned int devmask)
-{
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-
-	/* software reset.  causes dev0 to be selected */
-	write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
-	udelay(20);
-	write_atapi_register(base, ATA_REG_CTRL, ap->ctl | ATA_SRST);
-	udelay(20);
-	write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
-
-	/* spec mandates ">= 2ms" before checking status.
-	 * We wait 150ms, because that was the magic delay used for
-	 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
-	 * between when the ATA command register is written, and then
-	 * status is checked.  Because waiting for "a while" before
-	 * checking status is fine, post SRST, we perform this magic
-	 * delay here as well.
-	 *
-	 * Old drivers/ide uses the 2mS rule and then waits for ready
-	 */
-	ata_msleep(ap, 150);
-
-	/* Before we perform post reset processing we want to see if
-	 * the bus shows 0xFF because the odd clown forgets the D7
-	 * pulldown resistor.
-	 */
-	if (bfin_check_status(ap) == 0xFF)
-		return 0;
-
-	bfin_bus_post_reset(ap, devmask);
-
-	return 0;
-}
-
-/**
- *	bfin_softreset - reset host port via ATA SRST
- *	@ap: port to reset
- *	@classes: resulting classes of attached devices
- *
- *	Note: Original code is ata_sff_softreset().
- */
-
-static int bfin_softreset(struct ata_link *link, unsigned int *classes,
-			  unsigned long deadline)
-{
-	struct ata_port *ap = link->ap;
-	unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
-	unsigned int devmask = 0, err_mask;
-	u8 err;
-
-	/* determine if device 0/1 are present */
-	if (bfin_devchk(ap, 0))
-		devmask |= (1 << 0);
-	if (slave_possible && bfin_devchk(ap, 1))
-		devmask |= (1 << 1);
-
-	/* select device 0 again */
-	bfin_dev_select(ap, 0);
-
-	/* issue bus reset */
-	err_mask = bfin_bus_softreset(ap, devmask);
-	if (err_mask) {
-		ata_port_err(ap, "SRST failed (err_mask=0x%x)\n",
-				err_mask);
-		return -EIO;
-	}
-
-	/* determine by signature whether we have ATA or ATAPI devices */
-	classes[0] = ata_sff_dev_classify(&ap->link.device[0],
-				devmask & (1 << 0), &err);
-	if (slave_possible && err != 0x81)
-		classes[1] = ata_sff_dev_classify(&ap->link.device[1],
-					devmask & (1 << 1), &err);
-
-	return 0;
-}
-
-/**
- *	bfin_bmdma_status - Read IDE DMA status
- *	@ap: Port associated with this ATA transaction.
- */
-
-static unsigned char bfin_bmdma_status(struct ata_port *ap)
-{
-	unsigned char host_stat = 0;
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-
-	if (ATAPI_GET_STATUS(base) & (MULTI_XFER_ON | ULTRA_XFER_ON))
-		host_stat |= ATA_DMA_ACTIVE;
-	if (ATAPI_GET_INT_STATUS(base) & ATAPI_DEV_INT)
-		host_stat |= ATA_DMA_INTR;
-
-	dev_dbg(ap->dev, "ATAPI: host_stat=0x%x\n", host_stat);
-
-	return host_stat;
-}
-
-/**
- *	bfin_data_xfer - Transfer data by PIO
- *	@qc: queued command
- *	@buf: data buffer
- *	@buflen: buffer length
- *	@write_data: read/write
- *
- *	Note: Original code is ata_sff_data_xfer().
- */
-
-static unsigned int bfin_data_xfer(struct ata_queued_cmd *qc,
-				   unsigned char *buf,
-				   unsigned int buflen, int rw)
-{
-	struct ata_port *ap = qc->dev->link->ap;
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-	unsigned int words = buflen >> 1;
-	unsigned short *buf16 = (u16 *)buf;
-
-	/* Transfer multiple of 2 bytes */
-	if (rw == READ)
-		read_atapi_data(base, words, buf16);
-	else
-		write_atapi_data(base, words, buf16);
-
-	/* Transfer trailing 1 byte, if any. */
-	if (unlikely(buflen & 0x01)) {
-		unsigned short align_buf[1] = { 0 };
-		unsigned char *trailing_buf = buf + buflen - 1;
-
-		if (rw == READ) {
-			read_atapi_data(base, 1, align_buf);
-			memcpy(trailing_buf, align_buf, 1);
-		} else {
-			memcpy(align_buf, trailing_buf, 1);
-			write_atapi_data(base, 1, align_buf);
-		}
-		words++;
-	}
-
-	return words << 1;
-}
-
-/**
- *	bfin_irq_clear - Clear ATAPI interrupt.
- *	@ap: Port associated with this ATA transaction.
- *
- *	Note: Original code is ata_bmdma_irq_clear().
- */
-
-static void bfin_irq_clear(struct ata_port *ap)
-{
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-
-	dev_dbg(ap->dev, "in atapi irq clear\n");
-	ATAPI_SET_INT_STATUS(base, ATAPI_GET_INT_STATUS(base)|ATAPI_DEV_INT
-		| MULTI_DONE_INT | UDMAIN_DONE_INT | UDMAOUT_DONE_INT
-		| MULTI_TERM_INT | UDMAIN_TERM_INT | UDMAOUT_TERM_INT);
-}
-
-/**
- *	bfin_thaw - Thaw DMA controller port
- *	@ap: port to thaw
- *
- *	Note: Original code is ata_sff_thaw().
- */
-
-void bfin_thaw(struct ata_port *ap)
-{
-	dev_dbg(ap->dev, "in atapi dma thaw\n");
-	bfin_check_status(ap);
-	ata_sff_irq_on(ap);
-}
-
-/**
- *	bfin_postreset - standard postreset callback
- *	@ap: the target ata_port
- *	@classes: classes of attached devices
- *
- *	Note: Original code is ata_sff_postreset().
- */
-
-static void bfin_postreset(struct ata_link *link, unsigned int *classes)
-{
-	struct ata_port *ap = link->ap;
-	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
-
-	/* re-enable interrupts */
-	ata_sff_irq_on(ap);
-
-	/* is double-select really necessary? */
-	if (classes[0] != ATA_DEV_NONE)
-		bfin_dev_select(ap, 1);
-	if (classes[1] != ATA_DEV_NONE)
-		bfin_dev_select(ap, 0);
-
-	/* bail out if no device is present */
-	if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
-		return;
-	}
-
-	/* set up device control */
-	write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
-}
-
-static void bfin_port_stop(struct ata_port *ap)
-{
-	dev_dbg(ap->dev, "in atapi port stop\n");
-	if (ap->udma_mask != 0 || ap->mwdma_mask != 0) {
-		dma_free_coherent(ap->dev,
-			BFIN_MAX_SG_SEGMENTS * sizeof(struct dma_desc_array),
-			ap->bmdma_prd,
-			ap->bmdma_prd_dma);
-
-		free_dma(CH_ATAPI_RX);
-		free_dma(CH_ATAPI_TX);
-	}
-}
-
-static int bfin_port_start(struct ata_port *ap)
-{
-	dev_dbg(ap->dev, "in atapi port start\n");
-	if (!(ap->udma_mask || ap->mwdma_mask))
-		return 0;
-
-	ap->bmdma_prd = dma_alloc_coherent(ap->dev,
-				BFIN_MAX_SG_SEGMENTS * sizeof(struct dma_desc_array),
-				&ap->bmdma_prd_dma,
-				GFP_KERNEL);
-
-	if (ap->bmdma_prd == NULL) {
-		dev_info(ap->dev, "Unable to allocate DMA descriptor array.\n");
-		goto out;
-	}
-
-	if (request_dma(CH_ATAPI_RX, "BFIN ATAPI RX DMA") >= 0) {
-		if (request_dma(CH_ATAPI_TX,
-			"BFIN ATAPI TX DMA") >= 0)
-			return 0;
-
-		free_dma(CH_ATAPI_RX);
-		dma_free_coherent(ap->dev,
-			BFIN_MAX_SG_SEGMENTS * sizeof(struct dma_desc_array),
-			ap->bmdma_prd,
-			ap->bmdma_prd_dma);
-	}
-
-out:
-	ap->udma_mask = 0;
-	ap->mwdma_mask = 0;
-	dev_err(ap->dev, "Unable to request ATAPI DMA!"
-		" Continue in PIO mode.\n");
-
-	return 0;
-}
-
-static unsigned int bfin_ata_host_intr(struct ata_port *ap,
-				   struct ata_queued_cmd *qc)
-{
-	struct ata_eh_info *ehi = &ap->link.eh_info;
-	u8 status, host_stat = 0;
-
-	VPRINTK("ata%u: protocol %d task_state %d\n",
-		ap->print_id, qc->tf.protocol, ap->hsm_task_state);
-
-	/* Check whether we are expecting interrupt in this state */
-	switch (ap->hsm_task_state) {
-	case HSM_ST_FIRST:
-		/* Some pre-ATAPI-4 devices assert INTRQ
-		 * at this state when ready to receive CDB.
-		 */
-
-		/* Check the ATA_DFLAG_CDB_INTR flag is enough here.
-		 * The flag was turned on only for atapi devices.
-		 * No need to check is_atapi_taskfile(&qc->tf) again.
-		 */
-		if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
-			goto idle_irq;
-		break;
-	case HSM_ST_LAST:
-		if (qc->tf.protocol == ATA_PROT_DMA ||
-		    qc->tf.protocol == ATAPI_PROT_DMA) {
-			/* check status of DMA engine */
-			host_stat = ap->ops->bmdma_status(ap);
-			VPRINTK("ata%u: host_stat 0x%X\n",
-				ap->print_id, host_stat);
-
-			/* if it's not our irq... */
-			if (!(host_stat & ATA_DMA_INTR))
-				goto idle_irq;
-
-			/* before we do anything else, clear DMA-Start bit */
-			ap->ops->bmdma_stop(qc);
-
-			if (unlikely(host_stat & ATA_DMA_ERR)) {
-				/* error when transferring data to/from memory */
-				qc->err_mask |= AC_ERR_HOST_BUS;
-				ap->hsm_task_state = HSM_ST_ERR;
-			}
-		}
-		break;
-	case HSM_ST:
-		break;
-	default:
-		goto idle_irq;
-	}
-
-	/* check altstatus */
-	status = ap->ops->sff_check_altstatus(ap);
-	if (status & ATA_BUSY)
-		goto busy_ata;
-
-	/* check main status, clearing INTRQ */
-	status = ap->ops->sff_check_status(ap);
-	if (unlikely(status & ATA_BUSY))
-		goto busy_ata;
-
-	/* ack bmdma irq events */
-	ap->ops->sff_irq_clear(ap);
-
-	ata_sff_hsm_move(ap, qc, status, 0);
-
-	if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA ||
-				       qc->tf.protocol == ATAPI_PROT_DMA))
-		ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat);
-
-busy_ata:
-	return 1;	/* irq handled */
-
-idle_irq:
-	ap->stats.idle_irq++;
-
-#ifdef ATA_IRQ_TRAP
-	if ((ap->stats.idle_irq % 1000) == 0) {
-		ap->ops->irq_ack(ap, 0); /* debug trap */
-		ata_port_warn(ap, "irq trap\n");
-		return 1;
-	}
-#endif
-	return 0;	/* irq not handled */
-}
-
-static irqreturn_t bfin_ata_interrupt(int irq, void *dev_instance)
-{
-	struct ata_host *host = dev_instance;
-	unsigned int i;
-	unsigned int handled = 0;
-	unsigned long flags;
-
-	/* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
-	spin_lock_irqsave(&host->lock, flags);
-
-	for (i = 0; i < host->n_ports; i++) {
-		struct ata_port *ap = host->ports[i];
-		struct ata_queued_cmd *qc;
-
-		qc = ata_qc_from_tag(ap, ap->link.active_tag);
-		if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
-			handled |= bfin_ata_host_intr(ap, qc);
-	}
-
-	spin_unlock_irqrestore(&host->lock, flags);
-
-	return IRQ_RETVAL(handled);
-}
-
-
-static struct scsi_host_template bfin_sht = {
-	ATA_BASE_SHT(DRV_NAME),
-	.sg_tablesize		= BFIN_MAX_SG_SEGMENTS,
-	.dma_boundary		= ATA_DMA_BOUNDARY,
-};
-
-static struct ata_port_operations bfin_pata_ops = {
-	.inherits		= &ata_bmdma_port_ops,
-
-	.set_piomode		= bfin_set_piomode,
-	.set_dmamode		= bfin_set_dmamode,
-
-	.sff_tf_load		= bfin_tf_load,
-	.sff_tf_read		= bfin_tf_read,
-	.sff_exec_command	= bfin_exec_command,
-	.sff_check_status	= bfin_check_status,
-	.sff_check_altstatus	= bfin_check_altstatus,
-	.sff_dev_select		= bfin_dev_select,
-	.sff_set_devctl		= bfin_set_devctl,
-
-	.bmdma_setup		= bfin_bmdma_setup,
-	.bmdma_start		= bfin_bmdma_start,
-	.bmdma_stop		= bfin_bmdma_stop,
-	.bmdma_status		= bfin_bmdma_status,
-	.sff_data_xfer		= bfin_data_xfer,
-
-	.qc_prep		= ata_noop_qc_prep,
-
-	.thaw			= bfin_thaw,
-	.softreset		= bfin_softreset,
-	.postreset		= bfin_postreset,
-
-	.sff_irq_clear		= bfin_irq_clear,
-
-	.port_start		= bfin_port_start,
-	.port_stop		= bfin_port_stop,
-};
-
-static struct ata_port_info bfin_port_info[] = {
-	{
-		.flags		= ATA_FLAG_SLAVE_POSS,
-		.pio_mask	= ATA_PIO4,
-		.mwdma_mask	= 0,
-		.udma_mask	= 0,
-		.port_ops	= &bfin_pata_ops,
-	},
-};
-
-/**
- *	bfin_reset_controller - initialize BF54x ATAPI controller.
- */
-
-static int bfin_reset_controller(struct ata_host *host)
-{
-	void __iomem *base = (void __iomem *)host->ports[0]->ioaddr.ctl_addr;
-	int count;
-	unsigned short status;
-
-	/* Disable all ATAPI interrupts */
-	ATAPI_SET_INT_MASK(base, 0);
-	SSYNC();
-
-	/* Assert the RESET signal 25us*/
-	ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | DEV_RST);
-	udelay(30);
-
-	/* Negate the RESET signal for 2ms*/
-	ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) & ~DEV_RST);
-	msleep(2);
-
-	/* Wait on Busy flag to clear */
-	count = 10000000;
-	do {
-		status = read_atapi_register(base, ATA_REG_STATUS);
-	} while (--count && (status & ATA_BUSY));
-
-	/* Enable only ATAPI Device interrupt */
-	ATAPI_SET_INT_MASK(base, 1);
-	SSYNC();
-
-	return (!count);
-}
-
-/**
- *	atapi_io_port - define atapi peripheral port pins.
- */
-static unsigned short atapi_io_port[] = {
-	P_ATAPI_RESET,
-	P_ATAPI_DIOR,
-	P_ATAPI_DIOW,
-	P_ATAPI_CS0,
-	P_ATAPI_CS1,
-	P_ATAPI_DMACK,
-	P_ATAPI_DMARQ,
-	P_ATAPI_INTRQ,
-	P_ATAPI_IORDY,
-	P_ATAPI_D0A,
-	P_ATAPI_D1A,
-	P_ATAPI_D2A,
-	P_ATAPI_D3A,
-	P_ATAPI_D4A,
-	P_ATAPI_D5A,
-	P_ATAPI_D6A,
-	P_ATAPI_D7A,
-	P_ATAPI_D8A,
-	P_ATAPI_D9A,
-	P_ATAPI_D10A,
-	P_ATAPI_D11A,
-	P_ATAPI_D12A,
-	P_ATAPI_D13A,
-	P_ATAPI_D14A,
-	P_ATAPI_D15A,
-	P_ATAPI_A0A,
-	P_ATAPI_A1A,
-	P_ATAPI_A2A,
-	0
-};
-
-/**
- *	bfin_atapi_probe	-	attach a bfin atapi interface
- *	@pdev: platform device
- *
- *	Register a bfin atapi interface.
- *
- *
- *	Platform devices are expected to contain 2 resources per port:
- *
- *		- I/O Base (IORESOURCE_IO)
- *		- IRQ	   (IORESOURCE_IRQ)
- *
- */
-static int bfin_atapi_probe(struct platform_device *pdev)
-{
-	int board_idx = 0;
-	struct resource *res;
-	struct ata_host *host;
-	unsigned int fsclk = get_sclk();
-	int udma_mode = 5;
-	const struct ata_port_info *ppi[] =
-		{ &bfin_port_info[board_idx], NULL };
-
-	/*
-	 * Simple resource validation ..
-	 */
-	if (unlikely(pdev->num_resources != 2)) {
-		dev_err(&pdev->dev, "invalid number of resources\n");
-		return -EINVAL;
-	}
-
-	/*
-	 * Get the register base first
-	 */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (res == NULL)
-		return -EINVAL;
-
-	while (bfin_port_info[board_idx].udma_mask > 0 &&
-			udma_fsclk[udma_mode] > fsclk) {
-		udma_mode--;
-		bfin_port_info[board_idx].udma_mask >>= 1;
-	}
-
-	/*
-	 * Now that that's out of the way, wire up the port..
-	 */
-	host = ata_host_alloc_pinfo(&pdev->dev, ppi, 1);
-	if (!host)
-		return -ENOMEM;
-
-	host->ports[0]->ioaddr.ctl_addr = (void *)res->start;
-
-	if (peripheral_request_list(atapi_io_port, "atapi-io-port")) {
-		dev_err(&pdev->dev, "Requesting Peripherals failed\n");
-		return -EFAULT;
-	}
-
-	if (bfin_reset_controller(host)) {
-		peripheral_free_list(atapi_io_port);
-		dev_err(&pdev->dev, "Fail to reset ATAPI device\n");
-		return -EFAULT;
-	}
-
-	if (ata_host_activate(host, platform_get_irq(pdev, 0),
-		bfin_ata_interrupt, IRQF_SHARED, &bfin_sht) != 0) {
-		peripheral_free_list(atapi_io_port);
-		dev_err(&pdev->dev, "Fail to attach ATAPI device\n");
-		return -ENODEV;
-	}
-
-	return 0;
-}
-
-/**
- *	bfin_atapi_remove	-	unplug a bfin atapi interface
- *	@pdev: platform device
- *
- *	A bfin atapi device has been unplugged. Perform the needed
- *	cleanup. Also called on module unload for any active devices.
- */
-static int bfin_atapi_remove(struct platform_device *pdev)
-{
-	struct ata_host *host = platform_get_drvdata(pdev);
-
-	ata_host_detach(host);
-
-	peripheral_free_list(atapi_io_port);
-
-	return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state)
-{
-	struct ata_host *host = platform_get_drvdata(pdev);
-	if (host)
-		return ata_host_suspend(host, state);
-	else
-		return 0;
-}
-
-static int bfin_atapi_resume(struct platform_device *pdev)
-{
-	struct ata_host *host = platform_get_drvdata(pdev);
-	int ret;
-
-	if (host) {
-		ret = bfin_reset_controller(host);
-		if (ret) {
-			printk(KERN_ERR DRV_NAME ": Error during HW init\n");
-			return ret;
-		}
-		ata_host_resume(host);
-	}
-
-	return 0;
-}
-#else
-#define bfin_atapi_suspend NULL
-#define bfin_atapi_resume NULL
-#endif
-
-static struct platform_driver bfin_atapi_driver = {
-	.probe			= bfin_atapi_probe,
-	.remove			= bfin_atapi_remove,
-	.suspend		= bfin_atapi_suspend,
-	.resume			= bfin_atapi_resume,
-	.driver = {
-		.name		= DRV_NAME,
-	},
-};
-
-#define ATAPI_MODE_SIZE		10
-static char bfin_atapi_mode[ATAPI_MODE_SIZE];
-
-static int __init bfin_atapi_init(void)
-{
-	pr_info("register bfin atapi driver\n");
-
-	switch(bfin_atapi_mode[0]) {
-	case 'p':
-	case 'P':
-		break;
-	case 'm':
-	case 'M':
-		bfin_port_info[0].mwdma_mask = ATA_MWDMA2;
-		break;
-	default:
-		bfin_port_info[0].udma_mask = ATA_UDMA5;
-	};
-
-	return platform_driver_register(&bfin_atapi_driver);
-}
-
-static void __exit bfin_atapi_exit(void)
-{
-	platform_driver_unregister(&bfin_atapi_driver);
-}
-
-module_init(bfin_atapi_init);
-module_exit(bfin_atapi_exit);
-/*
- * ATAPI mode:
- * pio/PIO
- * udma/UDMA (default)
- * mwdma/MWDMA
- */
-module_param_string(bfin_atapi_mode, bfin_atapi_mode, ATAPI_MODE_SIZE, 0);
-
-MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
-MODULE_DESCRIPTION("PATA driver for blackfin 54x ATAPI controller");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(DRV_VERSION);
-MODULE_ALIAS("platform:" DRV_NAME);
-- 
2.7.4