Add sata sil3114 support

Signed-off-by: Tor Krill <tor@excito.com>

1 files changed, 839 insertions, 0 deletions

diff --git a/drivers/block/sata_sil3114.c b/drivers/block/sata_sil3114.c
new file mode 100644
index 0000000..8399737
--- /dev/null
+++ b/drivers/block/sata_sil3114.c
@@ -0,0 +1,839 @@
+/*
+ * Copyright (C) Excito Elektronik i Skåne AB, All rights reserved.
+ * Author: Tor Krill <tor@excito.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * This is a driver for Silicon Image sil3114 sata chip modelled on
+ * the ata_piix driver
+ */
+
+#include <common.h>
+#include <pci.h>
+#include <command.h>
+#include <config.h>
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <ide.h>
+#include <libata.h>
+#include "sata_sil3114.h"
+
+/* Convert sectorsize to wordsize */
+#define ATA_SECTOR_WORDS (ATA_SECT_SIZE/2)
+
+/* Forwards */
+u8 sil3114_spin_up (int num);
+u8 sil3114_spin_down (int num);
+static int sata_bus_softreset (int num);
+static void sata_identify (int num, int dev);
+static u8 check_power_mode (int num);
+static void sata_port (struct sata_ioports *ioport);
+static void set_Feature_cmd (int num, int dev);
+static u8 sata_busy_wait (struct sata_ioports *ioaddr, int bits,
+			  unsigned int max, u8 usealtstatus);
+static u8 sata_chk_status (struct sata_ioports *ioaddr, u8 usealtstatus);
+static void msleep (int count);
+
+static u32 iobase[6] = { 0, 0, 0, 0, 0, 0};	/* PCI BAR registers for device */
+extern block_dev_desc_t sata_dev_desc[CFG_SATA_MAX_DEVICE];
+
+static struct sata_port port[CFG_SATA_MAX_DEVICE];
+
+static void output_data (struct sata_ioports *ioaddr, u16 * sect_buf, int words)
+{
+	while (words--) {
+		__raw_writew (*sect_buf++, (void *)ioaddr->data_addr);
+	}
+}
+
+static int input_data (struct sata_ioports *ioaddr, u16 * sect_buf, int words)
+{
+	while (words--) {
+		*sect_buf++ = __raw_readw ((void *)ioaddr->data_addr);
+	}
+	return 0;
+}
+
+static int sata_bus_softreset (int num)
+{
+	u8 status = 0;
+
+	port[num].dev_mask = 1;
+
+	port[num].ctl_reg = 0x08;	/*Default value of control reg */
+	writeb (port[num].ctl_reg, port[num].ioaddr.ctl_addr);
+	udelay (10);
+	writeb (port[num].ctl_reg | ATA_SRST, port[num].ioaddr.ctl_addr);
+	udelay (10);
+	writeb (port[num].ctl_reg, port[num].ioaddr.ctl_addr);
+
+	/* 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.
+	 */
+	msleep (150);
+	status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 300, 0);
+	while ((status & ATA_BUSY)) {
+		msleep (100);
+		status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 3, 0);
+	}
+
+	if (status & ATA_BUSY) {
+		printf ("ata%u is slow to respond,plz be patient\n", port);
+	}
+
+	while ((status & ATA_BUSY)) {
+		msleep (100);
+		status = sata_chk_status (&port[num].ioaddr, 0);
+	}
+
+	if (status & ATA_BUSY) {
+		printf ("ata%u failed to respond : ", port);
+		printf ("bus reset failed\n");
+		port[num].dev_mask = 0;
+		return 1;
+	}
+	return 0;
+}
+
+static void sata_identify (int num, int dev)
+{
+	u8 cmd = 0, status = 0, devno = num;
+	u16 iobuf[ATA_SECTOR_WORDS];
+	u64 n_sectors = 0;
+
+	memset (iobuf, 0, sizeof (iobuf));
+
+	if (!(port[num].dev_mask & 0x01)) {
+		printf ("dev%d is not present on port#%d\n", dev, num);
+		return;
+	}
+
+	debug ("port=%d dev=%d\n", num, dev);
+
+	status = 0;
+	cmd = ATA_CMD_ID_ATA;	/*Device Identify Command */
+	writeb (cmd, port[num].ioaddr.command_addr);
+	readb (port[num].ioaddr.altstatus_addr);
+	udelay (10);
+
+	status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 1000, 0);
+	if (status & ATA_ERR) {
+		printf ("\ndevice not responding\n");
+		port[num].dev_mask &= ~0x01;
+		return;
+	}
+
+	input_data (&port[num].ioaddr, iobuf, ATA_SECTOR_WORDS);
+
+	ata_swap_buf_le16 (iobuf, ATA_SECTOR_WORDS);
+
+	debug ("Specific config: %x\n", iobuf[2]);
+
+	/* we require LBA and DMA support (bits 8 & 9 of word 49) */
+	if (!ata_id_has_dma (iobuf) || !ata_id_has_lba (iobuf)) {
+		debug ("ata%u: no dma/lba\n", num);
+	}
+#ifdef DEBUG
+	ata_dump_id (iobuf);
+#endif
+	n_sectors = ata_id_n_sectors (iobuf);
+
+	if (n_sectors == 0) {
+		port[num].dev_mask &= ~0x01;
+		return;
+	}
+	ata_id_c_string (iobuf, (unsigned char *)sata_dev_desc[devno].revision,
+			 ATA_ID_FW_REV, sizeof (sata_dev_desc[devno].revision));
+	ata_id_c_string (iobuf, (unsigned char *)sata_dev_desc[devno].vendor,
+			 ATA_ID_PROD, sizeof (sata_dev_desc[devno].vendor));
+	ata_id_c_string (iobuf, (unsigned char *)sata_dev_desc[devno].product,
+			 ATA_ID_SERNO, sizeof (sata_dev_desc[devno].product));
+
+	/* TODO - atm we asume harddisk ie not removable */
+	sata_dev_desc[devno].removable = 0;
+
+	sata_dev_desc[devno].lba = (u32) n_sectors;
+	debug ("lba=0x%x\n", sata_dev_desc[devno].lba);
+
+#ifdef CONFIG_LBA48
+	if (iobuf[83] & (1 << 10)) {
+		sata_dev_desc[devno].lba48 = 1;
+	} else {
+		sata_dev_desc[devno].lba48 = 0;
+	}
+#endif
+
+	/* assuming HD */
+	sata_dev_desc[devno].type = DEV_TYPE_HARDDISK;
+	sata_dev_desc[devno].blksz = ATA_SECT_SIZE;
+	sata_dev_desc[devno].lun = 0;	/* just to fill something in... */
+}
+
+static void set_Feature_cmd (int num, int dev)
+{
+	u8 status = 0;
+
+	if (!(port[num].dev_mask & 0x01)) {
+		debug ("dev%d is not present on port#%d\n", dev, num);
+		return;
+	}
+
+	writeb (SETFEATURES_XFER, port[num].ioaddr.feature_addr);
+	writeb (XFER_PIO_4, port[num].ioaddr.nsect_addr);
+	writeb (0, port[num].ioaddr.lbal_addr);
+	writeb (0, port[num].ioaddr.lbam_addr);
+	writeb (0, port[num].ioaddr.lbah_addr);
+
+	writeb (ATA_DEVICE_OBS, port[num].ioaddr.device_addr);
+	writeb (ATA_CMD_SET_FEATURES, port[num].ioaddr.command_addr);
+
+	udelay (50);
+	msleep (150);
+
+	status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 5000, 0);
+	if ((status & (ATA_BUSY | ATA_ERR))) {
+		printf ("Error  : status 0x%02x\n", status);
+		port[num].dev_mask &= ~0x01;
+	}
+}
+
+u8 sil3114_spin_down (int num)
+{
+	u8 status = 0;
+
+	debug ("Spin down disk\n");
+
+	if (!(port[num].dev_mask & 0x01)) {
+		debug ("Device ata%d is not present\n", num);
+		return 1;
+	}
+
+	if ((status = check_power_mode (num)) == 0x00) {
+		debug ("Already in standby\n");
+		return 0;
+	}
+
+	if (status == 0x01) {
+		printf ("Failed to check power mode on ata%d\n", num);
+		return 1;
+	}
+
+	if (!((status = sata_chk_status (&port[num].ioaddr, 0)) & ATA_DRDY)) {
+		printf ("Device ata%d not ready\n", num);
+		return 1;
+	}
+
+	writeb (0x00, port[num].ioaddr.feature_addr);
+
+	writeb (0x00, port[num].ioaddr.nsect_addr);
+	writeb (0x00, port[num].ioaddr.lbal_addr);
+	writeb (0x00, port[num].ioaddr.lbam_addr);
+	writeb (0x00, port[num].ioaddr.lbah_addr);
+
+	writeb (ATA_DEVICE_OBS, port[num].ioaddr.device_addr);
+	writeb (ATA_CMD_STANDBY, port[num].ioaddr.command_addr);
+
+	status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 30000, 0);
+	if ((status & (ATA_BUSY | ATA_ERR))) {
+		printf ("Error waiting for disk spin down: status 0x%02x\n",
+			status);
+		port[num].dev_mask &= ~0x01;
+		return 1;
+	}
+	return 0;
+}
+
+u8 sil3114_spin_up (int num)
+{
+	u8 status = 0;
+
+	debug ("Spin up disk\n");
+
+	if (!(port[num].dev_mask & 0x01)) {
+		debug ("Device ata%d is not present\n", num);
+		return 1;
+	}
+
+	if ((status = check_power_mode (num)) != 0x00) {
+		if (status == 0x01) {
+			printf ("Failed to check power mode on ata%d\n", num);
+			return 1;
+		} else {
+			/* should be up and running already */
+			return 0;
+		}
+	}
+
+	if (!((status = sata_chk_status (&port[num].ioaddr, 0)) & ATA_DRDY)) {
+		printf ("Device ata%d not ready\n", num);
+		return 1;
+	}
+
+	debug ("Stautus of device check: %d\n", status);
+
+	writeb (0x00, port[num].ioaddr.feature_addr);
+
+	writeb (0x00, port[num].ioaddr.nsect_addr);
+	writeb (0x00, port[num].ioaddr.lbal_addr);
+	writeb (0x00, port[num].ioaddr.lbam_addr);
+	writeb (0x00, port[num].ioaddr.lbah_addr);
+
+	writeb (ATA_DEVICE_OBS, port[num].ioaddr.device_addr);
+	writeb (ATA_CMD_IDLE, port[num].ioaddr.command_addr);
+
+	status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 30000, 0);
+	if ((status & (ATA_BUSY | ATA_ERR))) {
+		printf ("Error waiting for disk spin up: status 0x%02x\n",
+			status);
+		port[num].dev_mask &= ~0x01;
+		return 1;
+	}
+
+	/* Wait for disk to enter Active state */
+	do {
+		msleep (10);
+		status = check_power_mode (num);
+	} while ((status == 0x00) || (status == 0x80));
+
+	if (status == 0x01) {
+		printf ("Falied waiting for disk to spin up\n");
+		return 1;
+	}
+
+	return 0;
+}
+
+/* Return value is not the usual here
+ * 0x00 - Device stand by
+ * 0x01 - Operation failed
+ * 0x80 - Device idle
+ * 0xff - Device active
+*/
+static u8 check_power_mode (int num)
+{
+	u8 status = 0;
+	u8 res = 0;
+	if (!(port[num].dev_mask & 0x01)) {
+		debug ("Device ata%d is not present\n", num);
+		return 1;
+	}
+
+	if (!(sata_chk_status (&port[num].ioaddr, 0) & ATA_DRDY)) {
+		printf ("Device ata%d not ready\n", num);
+		return 1;
+	}
+
+	writeb (0, port[num].ioaddr.feature_addr);
+	writeb (0, port[num].ioaddr.nsect_addr);
+	writeb (0, port[num].ioaddr.lbal_addr);
+	writeb (0, port[num].ioaddr.lbam_addr);
+	writeb (0, port[num].ioaddr.lbah_addr);
+
+	writeb (ATA_DEVICE_OBS, port[num].ioaddr.device_addr);
+	writeb (ATA_CMD_CHK_POWER, port[num].ioaddr.command_addr);
+
+	status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 5000, 0);
+	if ((status & (ATA_BUSY | ATA_ERR))) {
+		printf
+		    ("Error waiting for check power mode complete  : status 0x%02x\n",
+		     status);
+		port[num].dev_mask &= ~0x01;
+		return 1;
+	}
+	res = readb (port[num].ioaddr.nsect_addr);
+	debug ("Check powermode: %d\n", res);
+	return res;
+
+}
+
+static void sata_port (struct sata_ioports *ioport)
+{
+	ioport->data_addr = ioport->cmd_addr + ATA_REG_DATA;
+	ioport->error_addr = ioport->cmd_addr + ATA_REG_ERR;
+	ioport->feature_addr = ioport->cmd_addr + ATA_REG_FEATURE;
+	ioport->nsect_addr = ioport->cmd_addr + ATA_REG_NSECT;
+	ioport->lbal_addr = ioport->cmd_addr + ATA_REG_LBAL;
+	ioport->lbam_addr = ioport->cmd_addr + ATA_REG_LBAM;
+	ioport->lbah_addr = ioport->cmd_addr + ATA_REG_LBAH;
+	ioport->device_addr = ioport->cmd_addr + ATA_REG_DEVICE;
+	ioport->status_addr = ioport->cmd_addr + ATA_REG_STATUS;
+	ioport->command_addr = ioport->cmd_addr + ATA_REG_CMD;
+}
+
+static u8 wait_for_irq (int num, unsigned int max)
+{
+
+	u32 port = iobase[5];
+	switch (num) {
+	case 0:
+		port += VND_TF_CNST_CH0;
+		break;
+	case 1:
+		port += VND_TF_CNST_CH1;
+		break;
+	case 2:
+		port += VND_TF_CNST_CH2;
+		break;
+	case 3:
+		port += VND_TF_CNST_CH3;
+		break;
+	default:
+		return 1;
+	}
+
+	do {
+		if (readl (port) & VND_TF_CNST_INTST) {
+			break;
+		}
+		udelay (1000);
+		max--;
+	} while ((max > 0));
+
+	return (max == 0);
+}
+
+static u8 sata_busy_wait (struct sata_ioports *ioaddr, int bits,
+			  unsigned int max, u8 usealtstatus)
+{
+	u8 status;
+
+	do {
+		if (!((status = sata_chk_status (ioaddr, usealtstatus)) & bits)) {
+			break;
+		}
+		udelay (1000);
+		max--;
+	} while ((status & bits) && (max > 0));
+
+	return status;
+}
+
+static u8 sata_chk_status (struct sata_ioports *ioaddr, u8 usealtstatus)
+{
+	if (!usealtstatus) {
+		return readb (ioaddr->status_addr);
+	} else {
+		return readb (ioaddr->altstatus_addr);
+	}
+}
+
+static void msleep (int count)
+{
+	int i;
+
+	for (i = 0; i < count; i++)
+		udelay (1000);
+}
+
+/* Read up to 255 sectors
+ *
+ * Returns sectors read
+*/
+static u8 do_one_read (int device, ulong block, u8 blkcnt, u16 * buff,
+		       uchar lba48)
+{
+
+	u8 sr = 0;
+	u8 status;
+	u64 blknr = (u64) block;
+
+	if (!(sata_chk_status (&port[device].ioaddr, 0) & ATA_DRDY)) {
+		printf ("Device ata%d not ready\n", device);
+		return 0;
+	}
+
+	/* Set up transfer */
+#ifdef CONFIG_LBA48
+	if (lba48) {
+		/* write high bits */
+		writeb (0, port[device].ioaddr.nsect_addr);
+		writeb ((blknr >> 24) & 0xFF, port[device].ioaddr.lbal_addr);
+		writeb ((blknr >> 32) & 0xFF, port[device].ioaddr.lbam_addr);
+		writeb ((blknr >> 40) & 0xFF, port[device].ioaddr.lbah_addr);
+	}
+#endif
+	writeb (blkcnt, port[device].ioaddr.nsect_addr);
+	writeb (((blknr) >> 0) & 0xFF, port[device].ioaddr.lbal_addr);
+	writeb ((blknr >> 8) & 0xFF, port[device].ioaddr.lbam_addr);
+	writeb ((blknr >> 16) & 0xFF, port[device].ioaddr.lbah_addr);
+
+#ifdef CONFIG_LBA48
+	if (lba48) {
+		writeb (ATA_LBA, port[device].ioaddr.device_addr);
+		writeb (ATA_CMD_PIO_READ_EXT, port[device].ioaddr.command_addr);
+	} else
+#endif
+	{
+		writeb (ATA_LBA | ((blknr >> 24) & 0xF),
+			port[device].ioaddr.device_addr);
+		writeb (ATA_CMD_PIO_READ, port[device].ioaddr.command_addr);
+	}
+
+	status = sata_busy_wait (&port[device].ioaddr, ATA_BUSY, 10000, 1);
+
+	if (status & ATA_BUSY) {
+		u8 err = 0;
+
+		printf ("Device %d not responding status %d\n", device, status);
+		err = readb (port[device].ioaddr.error_addr);
+		printf ("Error reg = 0x%x\n", err);
+
+		return (sr);
+	}
+	while (blkcnt--) {
+
+		if (wait_for_irq (device, 500)) {
+			printf ("ata%u irq failed\n", device);
+			return sr;
+		}
+
+		status = sata_chk_status (&port[device].ioaddr, 0);
+		if (status & ATA_ERR) {
+			printf ("ata%u error %d\n", device,
+				readb (port[device].ioaddr.error_addr));
+			return sr;
+		}
+		/* Read one sector */
+		input_data (&port[device].ioaddr, buff, ATA_SECTOR_WORDS);
+		buff += ATA_SECTOR_WORDS;
+		sr++;
+
+	}
+	return sr;
+}
+
+ulong sata_read (int device, ulong block, lbaint_t blkcnt, void *buff)
+{
+	ulong n = 0, sread;
+	u16 *buffer = (u16 *) buff;
+	u8 status = 0;
+	u64 blknr = (u64) block;
+	unsigned char lba48 = 0;
+
+#ifdef CONFIG_LBA48
+	if (blknr > 0xfffffff) {
+		if (!sata_dev_desc[device].lba48) {
+			printf ("Drive doesn't support 48-bit addressing\n");
+			return 0;
+		}
+		/* more than 28 bits used, use 48bit mode */
+		lba48 = 1;
+	}
+#endif
+
+	while (blkcnt > 0) {
+
+		if (blkcnt > 255) {
+			sread = 255;
+		} else {
+			sread = blkcnt;
+		}
+
+		status = do_one_read (device, blknr, sread, buffer, lba48);
+		if (status != sread) {
+			printf ("Read failed\n");
+			return n;
+		}
+
+		blkcnt -= sread;
+		blknr += sread;
+		n += sread;
+		buffer += sread * ATA_SECTOR_WORDS;
+	}
+	return n;
+}
+
+ulong sata_write (int device, ulong block, lbaint_t blkcnt, const void *buff)
+{
+	ulong n = 0;
+	u16 *buffer = (u16 *) buff;
+	unsigned char status = 0, num = 0;
+	u64 blknr = (u64) block;
+#ifdef CONFIG_LBA48
+	unsigned char lba48 = 0;
+
+	if (blknr > 0xfffffff) {
+		if (!sata_dev_desc[device].lba48) {
+			printf ("Drive doesn't support 48-bit addressing\n");
+			return 0;
+		}
+		/* more than 28 bits used, use 48bit mode */
+		lba48 = 1;
+	}
+#endif
+	/*Port Number */
+	num = device;
+
+	while (blkcnt-- > 0) {
+		status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 500, 0);
+		if (status & ATA_BUSY) {
+			printf ("ata%u failed to respond\n", port[num].port_no);
+			return n;
+		}
+#ifdef CONFIG_LBA48
+		if (lba48) {
+			/* write high bits */
+			writeb (0, port[num].ioaddr.nsect_addr);
+			writeb ((blknr >> 24) & 0xFF,
+				port[num].ioaddr.lbal_addr);
+			writeb ((blknr >> 32) & 0xFF,
+				port[num].ioaddr.lbam_addr);
+			writeb ((blknr >> 40) & 0xFF,
+				port[num].ioaddr.lbah_addr);
+		}
+#endif
+		writeb (1, port[num].ioaddr.nsect_addr);
+		writeb ((blknr >> 0) & 0xFF, port[num].ioaddr.lbal_addr);
+		writeb ((blknr >> 8) & 0xFF, port[num].ioaddr.lbam_addr);
+		writeb ((blknr >> 16) & 0xFF, port[num].ioaddr.lbah_addr);
+#ifdef CONFIG_LBA48
+		if (lba48) {
+			writeb (ATA_LBA, port[num].ioaddr.device_addr);
+			writeb (ATA_CMD_PIO_WRITE_EXT, port[num].ioaddr.command_addr);
+		} else
+#endif
+		{
+			writeb (ATA_LBA | ((blknr >> 24) & 0xF),
+				port[num].ioaddr.device_addr);
+			writeb (ATA_CMD_PIO_WRITE, port[num].ioaddr.command_addr);
+		}
+
+		msleep (50);
+		/*may take up to 4 sec */
+		status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 4000, 0);
+		if ((status & (ATA_DRQ | ATA_BUSY | ATA_ERR)) != ATA_DRQ) {
+			printf ("Error no DRQ dev %d blk %ld: sts 0x%02x\n",
+				device, (ulong) blknr, status);
+			return (n);
+		}
+
+		output_data (&port[num].ioaddr, buffer, ATA_SECTOR_WORDS);
+		readb (port[num].ioaddr.altstatus_addr);
+		udelay (50);
+
+		++n;
+		++blknr;
+		buffer += ATA_SECTOR_WORDS;
+	}
+	return n;
+}
+
+/* Driver implementation */
+static u8 sil_get_device_cache_line (pci_dev_t pdev)
+{
+	u8 cache_line = 0;
+	pci_read_config_byte (pdev, PCI_CACHE_LINE_SIZE, &cache_line);
+	return cache_line;
+}
+
+int init_sata (int dev)
+{
+	static u8 init_done = 0;
+	static int res = 1;
+	pci_dev_t devno;
+	u8 cls = 0;
+	u16 cmd = 0;
+	u32 sconf = 0;
+
+	if (init_done) {
+		return res;
+	}
+
+	init_done = 1;
+
+	if ((devno = pci_find_device (SIL_VEND_ID, SIL3114_DEVICE_ID, 0)) == -1) {
+		res = 1;
+		return res;
+	}
+
+	/* Read out all BARs, even though we only use MMIO from BAR5 */
+	pci_read_config_dword (devno, PCI_BASE_ADDRESS_0, &iobase[0]);
+	pci_read_config_dword (devno, PCI_BASE_ADDRESS_1, &iobase[1]);
+	pci_read_config_dword (devno, PCI_BASE_ADDRESS_2, &iobase[2]);
+	pci_read_config_dword (devno, PCI_BASE_ADDRESS_3, &iobase[3]);
+	pci_read_config_dword (devno, PCI_BASE_ADDRESS_4, &iobase[4]);
+	pci_read_config_dword (devno, PCI_BASE_ADDRESS_5, &iobase[5]);
+
+	if ((iobase[0] == 0xFFFFFFFF) || (iobase[1] == 0xFFFFFFFF) ||
+	    (iobase[2] == 0xFFFFFFFF) || (iobase[3] == 0xFFFFFFFF) ||
+	    (iobase[4] == 0xFFFFFFFF) || (iobase[5] == 0xFFFFFFFF)) {
+		printf ("Error no base addr for SATA controller\n");
+		res = 1;
+		return res;
+	}
+
+	/* mask off unused bits */
+	iobase[0] &= 0xfffffffc;
+	iobase[1] &= 0xfffffff8;
+	iobase[2] &= 0xfffffffc;
+	iobase[3] &= 0xfffffff8;
+	iobase[4] &= 0xfffffff0;
+	iobase[5] &= 0xfffffc00;
+
+	/* from sata_sil in Linux kernel */
+	cls = sil_get_device_cache_line (devno);
+	if (cls) {
+		cls >>= 3;
+		cls++;		/* cls = (line_size/8)+1 */
+		writel (cls << 8 | cls, iobase[5] + VND_FIFOCFG_CH0);
+		writel (cls << 8 | cls, iobase[5] + VND_FIFOCFG_CH1);
+		writel (cls << 8 | cls, iobase[5] + VND_FIFOCFG_CH2);
+		writel (cls << 8 | cls, iobase[5] + VND_FIFOCFG_CH3);
+	} else {
+		printf ("Cache line not set. Driver may not function\n");
+	}
+
+	/* Enable operation */
+	pci_read_config_word (devno, PCI_COMMAND, &cmd);
+	cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
+	pci_write_config_word (devno, PCI_COMMAND, cmd);
+
+	/* Disable interrupt usage */
+	pci_read_config_dword (devno, VND_SYSCONFSTAT, &sconf);
+	sconf |= (VND_SYSCONFSTAT_CHN_0_INTBLOCK | VND_SYSCONFSTAT_CHN_1_INTBLOCK);
+	pci_write_config_dword (devno, VND_SYSCONFSTAT, sconf);
+
+	res = 0;
+	return res;
+}
+
+/* Check if device is connected to port */
+int sata_bus_probe (int portno)
+{
+	u32 port = iobase[5];
+	u32 val;
+	switch (portno) {
+	case 0:
+		port += VND_SSTATUS_CH0;
+		break;
+	case 1:
+		port += VND_SSTATUS_CH1;
+		break;
+	case 2:
+		port += VND_SSTATUS_CH2;
+		break;
+	case 3:
+		port += VND_SSTATUS_CH3;
+		break;
+	default:
+		return 0;
+	}
+	val = readl (port);
+	if ((val & SATA_DET_PRES) == SATA_DET_PRES) {
+		return 1;
+	} else {
+		return 0;
+	}
+}
+
+int sata_phy_reset (int portno)
+{
+	u32 port = iobase[5];
+	u32 val;
+	switch (portno) {
+	case 0:
+		port += VND_SCONTROL_CH0;
+		break;
+	case 1:
+		port += VND_SCONTROL_CH1;
+		break;
+	case 2:
+		port += VND_SCONTROL_CH2;
+		break;
+	case 3:
+		port += VND_SCONTROL_CH3;
+		break;
+	default:
+		return 0;
+	}
+	val = readl (port);
+	writel (val | SATA_SC_DET_RST, port);
+	msleep (150);
+	writel (val & ~SATA_SC_DET_RST, port);
+	return 0;
+}
+
+int scan_sata (int dev)
+{
+	/* A bit brain dead, but the code has a legacy */
+	switch (dev) {
+	case 0:
+		port[0].port_no = 0;
+		port[0].ioaddr.cmd_addr = iobase[5] + VND_TF0_CH0;
+		port[0].ioaddr.altstatus_addr = port[0].ioaddr.ctl_addr =
+		    (iobase[5] + VND_TF2_CH0) | ATA_PCI_CTL_OFS;
+		port[0].ioaddr.bmdma_addr = iobase[5] + VND_BMDMA_CH0;
+		break;
+	case 1:
+		port[1].port_no = 0;
+		port[1].ioaddr.cmd_addr = iobase[5] + VND_TF0_CH1;
+		port[1].ioaddr.altstatus_addr = port[1].ioaddr.ctl_addr =
+		    (iobase[5] + VND_TF2_CH1) | ATA_PCI_CTL_OFS;
+		port[1].ioaddr.bmdma_addr = iobase[5] + VND_BMDMA_CH1;
+		break;
+	case 2:
+		port[2].port_no = 0;
+		port[2].ioaddr.cmd_addr = iobase[5] + VND_TF0_CH2;
+		port[2].ioaddr.altstatus_addr = port[2].ioaddr.ctl_addr =
+		    (iobase[5] + VND_TF2_CH2) | ATA_PCI_CTL_OFS;
+		port[2].ioaddr.bmdma_addr = iobase[5] + VND_BMDMA_CH2;
+		break;
+	case 3:
+		port[3].port_no = 0;
+		port[3].ioaddr.cmd_addr = iobase[5] + VND_TF0_CH3;
+		port[3].ioaddr.altstatus_addr = port[3].ioaddr.ctl_addr =
+		    (iobase[5] + VND_TF2_CH3) | ATA_PCI_CTL_OFS;
+		port[3].ioaddr.bmdma_addr = iobase[5] + VND_BMDMA_CH3;
+		break;
+	default:
+		printf ("Tried to scan unknown port: ata%d\n", dev);
+		return 1;
+	}
+
+	/* Initialize other registers */
+	sata_port (&port[dev].ioaddr);
+
+	/* Check for attached device */
+	if (!sata_bus_probe (dev)) {
+		port[dev].port_state = 0;
+		debug ("SATA#%d port is not present\n", dev);
+	} else {
+		debug ("SATA#%d port is present\n", dev);
+		if (sata_bus_softreset (dev)) {
+			/* soft reset failed, try a hard one */
+			sata_phy_reset (dev);
+			if (sata_bus_softreset (dev)) {
+				port[dev].port_state = 0;
+			} else {
+				port[dev].port_state = 1;
+			}
+		} else {
+			port[dev].port_state = 1;
+		}
+	}
+	if (port[dev].port_state == 1) {
+		/* Probe device and set xfer mode */
+		sata_identify (dev, 0);
+		set_Feature_cmd (dev, 0);
+	}
+
+	return 0;
+}