drivers: add the support for Freescale SATA controller

Add the Freescale on-chip SATA controller driver to u-boot,
The SATA controller is used on the 837x and 8315 targets,
The driver can be used to load kernel, fs and dtb.

The features list:
- 1.5/3 Gbps link speed
- LBA48, LBA28 support
- DMA and FPDMA support
- Two ports support

Signed-off-by: Dave Liu <daveliu@freescale.com>

1 files changed, 916 insertions, 0 deletions

diff --git a/drivers/block/fsl_sata.c b/drivers/block/fsl_sata.c
new file mode 100644
index 0000000..7436c4d
--- /dev/null
+++ b/drivers/block/fsl_sata.c
@@ -0,0 +1,916 @@
+/*
+ * Copyright (C) 2008 Freescale Semiconductor, Inc.
+ *		Dave Liu <daveliu@freescale.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
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/io.h>
+#include <malloc.h>
+#include <libata.h>
+#include <fis.h>
+#include "fsl_sata.h"
+
+extern block_dev_desc_t sata_dev_desc[CFG_SATA_MAX_DEVICE];
+
+#ifndef CFG_SATA1_FLAGS
+	#define CFG_SATA1_FLAGS	FLAGS_DMA
+#endif
+#ifndef CFG_SATA2_FLAGS
+	#define CFG_SATA2_FLAGS	FLAGS_DMA
+#endif
+
+static struct fsl_sata_info fsl_sata_info[] = {
+#ifdef CONFIG_SATA1
+	{CFG_SATA1, CFG_SATA1_FLAGS},
+#else
+	{0, 0},
+#endif
+#ifdef CONFIG_SATA2
+	{CFG_SATA2, CFG_SATA2_FLAGS},
+#else
+	{0, 0},
+#endif
+};
+
+static inline void mdelay(unsigned long msec)
+{
+	unsigned long i;
+	for (i = 0; i < msec; i++)
+		udelay(1000);
+}
+
+static inline void sdelay(unsigned long sec)
+{
+	unsigned long i;
+	for (i = 0; i < sec; i++)
+		mdelay(1000);
+}
+
+void dprint_buffer(unsigned char *buf, int len)
+{
+	int i, j;
+
+	i = 0;
+	j = 0;
+	printf("\n\r");
+
+	for (i = 0; i < len; i++) {
+		printf("%02x ", *buf++);
+		j++;
+		if (j == 16) {
+			printf("\n\r");
+			j = 0;
+		}
+	}
+	printf("\n\r");
+}
+
+static void fsl_sata_dump_sfis(struct sfis *s)
+{
+	printf("Status FIS dump:\n\r");
+	printf("fis_type:		%02x\n\r", s->fis_type);
+	printf("pm_port_i:		%02x\n\r", s->pm_port_i);
+	printf("status:			%02x\n\r", s->status);
+	printf("error:			%02x\n\r", s->error);
+	printf("lba_low:		%02x\n\r", s->lba_low);
+	printf("lba_mid:		%02x\n\r", s->lba_mid);
+	printf("lba_high:		%02x\n\r", s->lba_high);
+	printf("device:			%02x\n\r", s->device);
+	printf("lba_low_exp:		%02x\n\r", s->lba_low_exp);
+	printf("lba_mid_exp:		%02x\n\r", s->lba_mid_exp);
+	printf("lba_high_exp:		%02x\n\r", s->lba_high_exp);
+	printf("res1:			%02x\n\r", s->res1);
+	printf("sector_count:		%02x\n\r", s->sector_count);
+	printf("sector_count_exp:	%02x\n\r", s->sector_count_exp);
+}
+
+static int ata_wait_register(volatile unsigned *addr, u32 mask,
+			 u32 val, u32 timeout_msec)
+{
+	int i;
+	u32 temp;
+
+	for (i = 0; (((temp = in_le32(addr)) & mask) != val)
+			 && i < timeout_msec; i++)
+		mdelay(1);
+	return (i < timeout_msec) ? 0 : -1;
+}
+
+int init_sata(int dev)
+{
+	u32 length, align;
+	cmd_hdr_tbl_t *cmd_hdr;
+	u32 cda;
+	u32 val32;
+	fsl_sata_reg_t *reg;
+	u32 sig;
+	int i;
+	fsl_sata_t *sata;
+
+	if (dev < 0 || dev > (CFG_SATA_MAX_DEVICE - 1)) {
+		printf("the sata index %d is out of ranges\n\r", dev);
+		return -1;
+	}
+
+	/* Allocate SATA device driver struct */
+	sata = (fsl_sata_t *)malloc(sizeof(fsl_sata_t));
+	if (!sata) {
+		printf("alloc the sata device struct failed\n\r");
+		return -1;
+	}
+	/* Zero all of the device driver struct */
+	memset((void *)sata, 0, sizeof(fsl_sata_t));
+
+	/* Save the private struct to block device struct */
+	sata_dev_desc[dev].priv = (void *)sata;
+
+	sprintf(sata->name, "SATA%d", dev);
+
+	/* Set the controller register base address to device struct */
+	reg = (fsl_sata_reg_t *)(fsl_sata_info[dev].sata_reg_base);
+	sata->reg_base = reg;
+
+	/* Allocate the command header table, 4 bytes aligned */
+	length = sizeof(struct cmd_hdr_tbl);
+	align = SATA_HC_CMD_HDR_TBL_ALIGN;
+	sata->cmd_hdr_tbl_offset = (void *)malloc(length + align);
+	if (!sata) {
+		printf("alloc the command header failed\n\r");
+		return -1;
+	}
+
+	cmd_hdr = (cmd_hdr_tbl_t *)(((u32)sata->cmd_hdr_tbl_offset + align)
+						& ~(align - 1));
+	sata->cmd_hdr = cmd_hdr;
+
+	/* Zero all of the command header table */
+	memset((void *)sata->cmd_hdr_tbl_offset, 0, length + align);
+
+	/* Allocate command descriptor for all command */
+	length = sizeof(struct cmd_desc) * SATA_HC_MAX_CMD;
+	align = SATA_HC_CMD_DESC_ALIGN;
+	sata->cmd_desc_offset = (void *)malloc(length + align);
+	if (!sata->cmd_desc_offset) {
+		printf("alloc the command descriptor failed\n\r");
+		return -1;
+	}
+	sata->cmd_desc = (cmd_desc_t *)(((u32)sata->cmd_desc_offset + align)
+						& ~(align - 1));
+	/* Zero all of command descriptor */
+	memset((void *)sata->cmd_desc_offset, 0, length + align);
+
+	/* Link the command descriptor to command header */
+	for (i = 0; i < SATA_HC_MAX_CMD; i++) {
+		cda = ((u32)sata->cmd_desc + SATA_HC_CMD_DESC_SIZE * i)
+					 & ~(CMD_HDR_CDA_ALIGN - 1);
+		cmd_hdr->cmd_slot[i].cda = cpu_to_le32(cda);
+	}
+
+	/* To have safe state, force the controller offline */
+	val32 = in_le32(&reg->hcontrol);
+	val32 &= ~HCONTROL_ONOFF;
+	val32 |= HCONTROL_FORCE_OFFLINE;
+	out_le32(&reg->hcontrol, val32);
+
+	/* Wait the controller offline */
+	ata_wait_register(&reg->hstatus, HSTATUS_ONOFF, 0, 1000);
+
+	/* Set the command header base address to CHBA register to tell DMA */
+	out_le32(&reg->chba, (u32)cmd_hdr & ~0x3);
+
+	/* Snoop for the command header */
+	val32 = in_le32(&reg->hcontrol);
+	val32 |= HCONTROL_HDR_SNOOP;
+	out_le32(&reg->hcontrol, val32);
+
+	/* Disable all of interrupts */
+	val32 = in_le32(&reg->hcontrol);
+	val32 &= ~HCONTROL_INT_EN_ALL;
+	out_le32(&reg->hcontrol, val32);
+
+	/* Clear all of interrupts */
+	val32 = in_le32(&reg->hstatus);
+	out_le32(&reg->hstatus, val32);
+
+	/* Set the ICC, no interrupt coalescing */
+	out_le32(&reg->icc, 0x01000000);
+
+	/* No PM attatched, the SATA device direct connect */
+	out_le32(&reg->cqpmp, 0);
+
+	/* Clear SError register */
+	val32 = in_le32(&reg->serror);
+	out_le32(&reg->serror, val32);
+
+	/* Clear CER register */
+	val32 = in_le32(&reg->cer);
+	out_le32(&reg->cer, val32);
+
+	/* Clear DER register */
+	val32 = in_le32(&reg->der);
+	out_le32(&reg->der, val32);
+
+	/* No device detection or initialization action requested */
+	out_le32(&reg->scontrol, 0x00000300);
+
+	/* Configure the transport layer, default value */
+	out_le32(&reg->transcfg, 0x08000016);
+
+	/* Configure the link layer, default value */
+	out_le32(&reg->linkcfg, 0x0000ff34);
+
+	/* Bring the controller online */
+	val32 = in_le32(&reg->hcontrol);
+	val32 |= HCONTROL_ONOFF;
+	out_le32(&reg->hcontrol, val32);
+
+	mdelay(100);
+
+	/* print sata device name */
+	if (!dev)
+		printf("%s ", sata->name);
+	else
+		printf("       %s ", sata->name);
+
+	/* Check PHYRDY */
+	val32 = in_le32(&reg->hstatus);
+	if (val32 & HSTATUS_PHY_RDY) {
+		sata->link = 1;
+	} else {
+		sata->link = 0;
+		printf("(No RDY)\n\r");
+		return -1;
+	}
+
+	if (val32 & HSTATUS_SIGNATURE) {
+		sig = in_le32(&reg->sig);
+		debug("Signature updated, the sig =%08x\n\r", sig);
+		sata->ata_device_type = ata_dev_classify(sig);
+	}
+
+	/* Check the speed */
+	val32 = in_le32(&reg->sstatus);
+	if ((val32 & SSTATUS_SPD_MASK) == SSTATUS_SPD_GEN1)
+		printf("(1.5 Gbps)\n\r");
+	else if ((val32 & SSTATUS_SPD_MASK) == SSTATUS_SPD_GEN2)
+		printf("(3 Gbps)\n\r");
+
+	return 0;
+}
+
+/* Hardware reset, like Power-on and COMRESET */
+void fsl_sata_hardware_reset(u32 reg_base)
+{
+	fsl_sata_reg_t *reg = (fsl_sata_reg_t *)reg_base;
+	u32 scontrol;
+
+	/* Disable the SATA interface and put PHY offline */
+	scontrol = in_le32(&reg->scontrol);
+	scontrol = (scontrol & 0x0f0) | 0x304;
+	out_le32(&reg->scontrol, scontrol);
+
+	/* No speed strict */
+	scontrol = in_le32(&reg->scontrol);
+	scontrol = scontrol & ~0x0f0;
+	out_le32(&reg->scontrol, scontrol);
+
+	/* Issue PHY wake/reset, Hardware_reset_asserted */
+	scontrol = in_le32(&reg->scontrol);
+	scontrol = (scontrol & 0x0f0) | 0x301;
+	out_le32(&reg->scontrol, scontrol);
+
+	mdelay(100);
+
+	/* Resume PHY, COMRESET negated, the device initialize hardware
+	 * and execute diagnostics, send good status-signature to host,
+	 * which is D2H register FIS, and then the device enter idle state.
+	 */
+	scontrol = in_le32(&reg->scontrol);
+	scontrol = (scontrol & 0x0f0) | 0x300;
+	out_le32(&reg->scontrol, scontrol);
+
+	mdelay(100);
+	return;
+}
+
+static void fsl_sata_dump_regs(fsl_sata_reg_t *reg)
+{
+	printf("\n\rSATA:           %08x\n\r", (u32)reg);
+	printf("CQR:            %08x\n\r", in_le32(&reg->cqr));
+	printf("CAR:            %08x\n\r", in_le32(&reg->car));
+	printf("CCR:            %08x\n\r", in_le32(&reg->ccr));
+	printf("CER:            %08x\n\r", in_le32(&reg->cer));
+	printf("CQR:            %08x\n\r", in_le32(&reg->cqr));
+	printf("DER:            %08x\n\r", in_le32(&reg->der));
+	printf("CHBA:           %08x\n\r", in_le32(&reg->chba));
+	printf("HStatus:        %08x\n\r", in_le32(&reg->hstatus));
+	printf("HControl:       %08x\n\r", in_le32(&reg->hcontrol));
+	printf("CQPMP:          %08x\n\r", in_le32(&reg->cqpmp));
+	printf("SIG:            %08x\n\r", in_le32(&reg->sig));
+	printf("ICC:            %08x\n\r", in_le32(&reg->icc));
+	printf("SStatus:        %08x\n\r", in_le32(&reg->sstatus));
+	printf("SError:         %08x\n\r", in_le32(&reg->serror));
+	printf("SControl:       %08x\n\r", in_le32(&reg->scontrol));
+	printf("SNotification:  %08x\n\r", in_le32(&reg->snotification));
+	printf("TransCfg:       %08x\n\r", in_le32(&reg->transcfg));
+	printf("TransStatus:    %08x\n\r", in_le32(&reg->transstatus));
+	printf("LinkCfg:        %08x\n\r", in_le32(&reg->linkcfg));
+	printf("LinkCfg1:       %08x\n\r", in_le32(&reg->linkcfg1));
+	printf("LinkCfg2:       %08x\n\r", in_le32(&reg->linkcfg2));
+	printf("LinkStatus:     %08x\n\r", in_le32(&reg->linkstatus));
+	printf("LinkStatus1:    %08x\n\r", in_le32(&reg->linkstatus1));
+	printf("PhyCtrlCfg:     %08x\n\r", in_le32(&reg->phyctrlcfg));
+	printf("SYSPR:          %08x\n\r", in_be32(&reg->syspr));
+}
+
+static int fsl_ata_exec_ata_cmd(struct fsl_sata *sata, struct cfis *cfis,
+				int is_ncq, int tag, u8 *buffer, u32 len)
+{
+	cmd_hdr_entry_t *cmd_hdr;
+	cmd_desc_t *cmd_desc;
+	sata_fis_h2d_t *h2d;
+	prd_entry_t *prde;
+	u32 ext_c_ddc;
+	u32 prde_count;
+	u32 val32;
+	u32 ttl;
+	fsl_sata_reg_t *reg = sata->reg_base;
+	int i;
+
+	/* Check xfer length */
+	if (len > SATA_HC_MAX_XFER_LEN) {
+		printf("max transfer length is 64MB\n\r");
+		return 0;
+	}
+
+	/* Setup the command descriptor */
+	cmd_desc = sata->cmd_desc + tag;
+
+	/* Get the pointer cfis of command descriptor */
+	h2d = (sata_fis_h2d_t *)cmd_desc->cfis;
+
+	/* Zero the cfis of command descriptor */
+	memset((void *)h2d, 0, SATA_HC_CMD_DESC_CFIS_SIZE);
+
+	/* Copy the cfis from user to command descriptor */
+	h2d->fis_type = cfis->fis_type;
+	h2d->pm_port_c = cfis->pm_port_c;
+	h2d->command = cfis->command;
+
+	h2d->features = cfis->features;
+	h2d->features_exp = cfis->features_exp;
+
+	h2d->lba_low = cfis->lba_low;
+	h2d->lba_mid = cfis->lba_mid;
+	h2d->lba_high = cfis->lba_high;
+	h2d->lba_low_exp = cfis->lba_low_exp;
+	h2d->lba_mid_exp = cfis->lba_mid_exp;
+	h2d->lba_high_exp = cfis->lba_high_exp;
+
+	if (!is_ncq) {
+		h2d->sector_count = cfis->sector_count;
+		h2d->sector_count_exp = cfis->sector_count_exp;
+	} else { /* NCQ */
+		h2d->sector_count = (u8)(tag << 3);
+	}
+
+	h2d->device = cfis->device;
+	h2d->control = cfis->control;
+
+	/* Setup the PRD table */
+	prde = (prd_entry_t *)cmd_desc->prdt;
+	memset((void *)prde, 0, sizeof(struct prdt));
+
+	prde_count = 0;
+	ttl = len;
+	for (i = 0; i < SATA_HC_MAX_PRD_DIRECT; i++) {
+		if (!len)
+			break;
+		prde->dba = cpu_to_le32((u32)buffer & ~0x3);
+		debug("dba = %08x\n\r", (u32)buffer);
+
+		if (len < PRD_ENTRY_MAX_XFER_SZ) {
+			ext_c_ddc = PRD_ENTRY_DATA_SNOOP | len;
+			debug("ext_c_ddc1 = %08x, len = %08x\n\r", ext_c_ddc, len);
+			prde->ext_c_ddc = cpu_to_le32(ext_c_ddc);
+			prde_count++;
+			prde++;
+			break;
+		} else {
+			ext_c_ddc = PRD_ENTRY_DATA_SNOOP; /* 4M bytes */
+			debug("ext_c_ddc2 = %08x, len = %08x\n\r", ext_c_ddc, len);
+			prde->ext_c_ddc = cpu_to_le32(ext_c_ddc);
+			buffer += PRD_ENTRY_MAX_XFER_SZ;
+			len -= PRD_ENTRY_MAX_XFER_SZ;
+			prde_count++;
+			prde++;
+		}
+	}
+
+	/* Setup the command slot of cmd hdr */
+	cmd_hdr = (cmd_hdr_entry_t *)&sata->cmd_hdr->cmd_slot[tag];
+
+	cmd_hdr->cda = cpu_to_le32((u32)cmd_desc & ~0x3);
+
+	val32 = prde_count << CMD_HDR_PRD_ENTRY_SHIFT;
+	val32 |= sizeof(sata_fis_h2d_t);
+	cmd_hdr->prde_fis_len = cpu_to_le32(val32);
+
+	cmd_hdr->ttl = cpu_to_le32(ttl);
+
+	if (!is_ncq) {
+		val32 = CMD_HDR_ATTR_RES | CMD_HDR_ATTR_SNOOP;
+	} else {
+		val32 = CMD_HDR_ATTR_RES | CMD_HDR_ATTR_SNOOP | CMD_HDR_ATTR_FPDMA;
+	}
+
+	tag &= CMD_HDR_ATTR_TAG;
+	val32 |= tag;
+
+	debug("attribute = %08x\n\r", val32);
+	cmd_hdr->attribute = cpu_to_le32(val32);
+
+	/* Make sure cmd desc and cmd slot valid before commmand issue */
+	sync();
+
+	/* PMP*/
+	val32 = (u32)(h2d->pm_port_c & 0x0f);
+	out_le32(&reg->cqpmp, val32);
+
+	/* Wait no active */
+	if (ata_wait_register(&reg->car, (1 << tag), 0, 10000))
+		printf("Wait no active time out\n\r");
+
+	/* Issue command */
+	if (!(in_le32(&reg->cqr) & (1 << tag))) {
+		val32 = 1 << tag;
+		out_le32(&reg->cqr, val32);
+	}
+
+	/* Wait command completed for 10s */
+	if (ata_wait_register(&reg->ccr, (1 << tag), (1 << tag), 10000)) {
+		if (!is_ncq)
+			printf("Non-NCQ command time out\n\r");
+		else
+			printf("NCQ command time out\n\r");
+	}
+
+	val32 = in_le32(&reg->cer);
+
+	if (val32) {
+		u32 der;
+		fsl_sata_dump_sfis((struct sfis *)cmd_desc->sfis);
+		printf("CE at device\n\r");
+		fsl_sata_dump_regs(reg);
+		der = in_le32(&reg->der);
+		out_le32(&reg->cer, val32);
+		out_le32(&reg->der, der);
+	}
+
+	/* Clear complete flags */
+	val32 = in_le32(&reg->ccr);
+	out_le32(&reg->ccr, val32);
+
+	return len;
+}
+
+static int fsl_ata_exec_reset_cmd(struct fsl_sata *sata, struct cfis *cfis,
+				 int tag, u8 *buffer, u32 len)
+{
+	return 0;
+}
+
+static int fsl_sata_exec_cmd(struct fsl_sata *sata, struct cfis *cfis,
+		 enum cmd_type command_type, int tag, u8 *buffer, u32 len)
+{
+	int rc;
+
+	if (tag > SATA_HC_MAX_CMD || tag < 0) {
+		printf("tag is out of range, tag=\n\r", tag);
+		return -1;
+	}
+
+	switch (command_type) {
+	case CMD_ATA:
+		rc = fsl_ata_exec_ata_cmd(sata, cfis, 0, tag, buffer, len);
+		return rc;
+	case CMD_RESET:
+		rc = fsl_ata_exec_reset_cmd(sata, cfis, tag, buffer, len);
+		return rc;
+	case CMD_NCQ:
+		rc = fsl_ata_exec_ata_cmd(sata, cfis, 1, tag, buffer, len);
+		return rc;
+	case CMD_ATAPI:
+	case CMD_VENDOR_BIST:
+	case CMD_BIST:
+		printf("not support now\n\r");
+		return -1;
+	default:
+		break;
+	}
+
+	return -1;
+}
+
+static void fsl_sata_identify(int dev, u16 *id)
+{
+	fsl_sata_t *sata = (fsl_sata_t *)sata_dev_desc[dev].priv;
+	struct sata_fis_h2d h2d;
+	struct cfis *cfis;
+
+	cfis = (struct cfis *)&h2d;
+	memset((void *)cfis, 0, sizeof(struct cfis));
+
+	cfis->fis_type = SATA_FIS_TYPE_REGISTER_H2D;
+	cfis->pm_port_c = 0x80; /* is command */
+	cfis->command = ATA_CMD_ID_ATA;
+
+	fsl_sata_exec_cmd(sata, cfis, CMD_ATA, 0, (u8 *)id, ATA_ID_WORDS * 2);
+	ata_swap_buf_le16(id, ATA_ID_WORDS);
+}
+
+static void fsl_sata_xfer_mode(int dev, u16 *id)
+{
+	fsl_sata_t *sata = (fsl_sata_t *)sata_dev_desc[dev].priv;
+
+	sata->pio = id[ATA_ID_PIO_MODES];
+	sata->mwdma = id[ATA_ID_MWDMA_MODES];
+	sata->udma = id[ATA_ID_UDMA_MODES];
+	debug("pio %04x, mwdma %04x, udma %04x\n\r", sata->pio, sata->mwdma, sata->udma);
+}
+
+static void fsl_sata_set_features(int dev)
+{
+	fsl_sata_t *sata = (fsl_sata_t *)sata_dev_desc[dev].priv;
+	struct sata_fis_h2d h2d;
+	struct cfis *cfis;
+	u8 udma_cap;
+
+	cfis = (struct cfis *)&h2d;
+	memset((void *)cfis, 0, sizeof(struct cfis));
+
+	cfis->fis_type = SATA_FIS_TYPE_REGISTER_H2D;
+	cfis->pm_port_c = 0x80; /* is command */
+	cfis->command = ATA_CMD_SET_FEATURES;
+	cfis->features = SETFEATURES_XFER;
+
+	/* First check the device capablity */
+	udma_cap = (u8)(sata->udma & 0xff);
+	debug("udma_cap %02x\n\r", udma_cap);
+
+	if (udma_cap == ATA_UDMA6)
+		cfis->sector_count = XFER_UDMA_6;
+	if (udma_cap == ATA_UDMA5)
+		cfis->sector_count = XFER_UDMA_5;
+	if (udma_cap == ATA_UDMA4)
+		cfis->sector_count = XFER_UDMA_4;
+	if (udma_cap == ATA_UDMA3)
+		cfis->sector_count = XFER_UDMA_3;
+
+	fsl_sata_exec_cmd(sata, cfis, CMD_ATA, 0, NULL, 0);
+}
+
+static u32 fsl_sata_rw_cmd(int dev, u32 start, u32 blkcnt, u8 *buffer, int is_write)
+{
+	fsl_sata_t *sata = (fsl_sata_t *)sata_dev_desc[dev].priv;
+	struct sata_fis_h2d h2d;
+	struct cfis *cfis;
+	u32 block;
+
+	block = start;
+	cfis = (struct cfis *)&h2d;
+
+	memset((void *)cfis, 0, sizeof(struct cfis));
+
+	cfis->fis_type = SATA_FIS_TYPE_REGISTER_H2D;
+	cfis->pm_port_c = 0x80; /* is command */
+	cfis->command = (is_write) ? ATA_CMD_WRITE_DMA : ATA_CMD_READ_DMA;
+	cfis->device = ATA_LBA;
+
+	cfis->device |= (block >> 24) & 0xf;
+	cfis->lba_high = (block >> 16) & 0xff;
+	cfis->lba_mid = (block >> 8) & 0xff;
+	cfis->lba_low = block & 0xff;
+	cfis->sector_count = (u8)(blkcnt & 0xff);
+
+	fsl_sata_exec_cmd(sata, cfis, CMD_ATA, 0, buffer, ATA_SECT_SIZE * blkcnt);
+	return blkcnt;
+}
+
+void fsl_sata_flush_cache(int dev)
+{
+	fsl_sata_t *sata = (fsl_sata_t *)sata_dev_desc[dev].priv;
+	struct sata_fis_h2d h2d;
+	struct cfis *cfis;
+
+	cfis = (struct cfis *)&h2d;
+
+	memset((void *)cfis, 0, sizeof(struct cfis));
+
+	cfis->fis_type = SATA_FIS_TYPE_REGISTER_H2D;
+	cfis->pm_port_c = 0x80; /* is command */
+	cfis->command = ATA_CMD_FLUSH_CACHE;
+
+	fsl_sata_exec_cmd(sata, cfis, CMD_ATA, 0, NULL, 0);
+}
+
+static u32 fsl_sata_rw_cmd_ext(int dev, u32 start, u32 blkcnt, u8 *buffer, int is_write)
+{
+	fsl_sata_t *sata = (fsl_sata_t *)sata_dev_desc[dev].priv;
+	struct sata_fis_h2d h2d;
+	struct cfis *cfis;
+	u64 block;
+
+	block = (u64)start;
+	cfis = (struct cfis *)&h2d;
+
+	memset((void *)cfis, 0, sizeof(struct cfis));
+
+	cfis->fis_type = SATA_FIS_TYPE_REGISTER_H2D;
+	cfis->pm_port_c = 0x80; /* is command */
+
+	cfis->command = (is_write) ? ATA_CMD_WRITE_DMA_EXT
+				 : ATA_CMD_READ_DMA_EXT;
+
+	cfis->lba_high_exp = (block >> 40) & 0xff;
+	cfis->lba_mid_exp = (block >> 32) & 0xff;
+	cfis->lba_low_exp = (block >> 24) & 0xff;
+	cfis->lba_high = (block >> 16) & 0xff;
+	cfis->lba_mid = (block >> 8) & 0xff;
+	cfis->lba_low = block & 0xff;
+	cfis->device = ATA_LBA;
+	cfis->sector_count_exp = (blkcnt >> 8) & 0xff;
+	cfis->sector_count = blkcnt & 0xff;
+
+	fsl_sata_exec_cmd(sata, cfis, CMD_ATA, 0, buffer, ATA_SECT_SIZE * blkcnt);
+	return blkcnt;
+}
+
+u32 fsl_sata_rw_ncq_cmd(int dev, u32 start, u32 blkcnt, u8 *buffer, int is_write)
+{
+	fsl_sata_t *sata = (fsl_sata_t *)sata_dev_desc[dev].priv;
+	struct sata_fis_h2d h2d;
+	struct cfis *cfis;
+	int ncq_channel;
+	u64 block;
+
+	if (sata_dev_desc[dev].lba48 != 1) {
+		printf("execute FPDMA command on non-LBA48 hard disk\n\r");
+		return -1;
+	}
+
+	block = (u64)start;
+	cfis = (struct cfis *)&h2d;
+
+	memset((void *)cfis, 0, sizeof(struct cfis));
+
+	cfis->fis_type = SATA_FIS_TYPE_REGISTER_H2D;
+	cfis->pm_port_c = 0x80; /* is command */
+
+	cfis->command = (is_write) ? ATA_CMD_WRITE_FPDMA_QUEUED
+				 : ATA_CMD_READ_FPDMA_QUEUED;
+
+	cfis->lba_high_exp = (block >> 40) & 0xff;
+	cfis->lba_mid_exp = (block >> 32) & 0xff;
+	cfis->lba_low_exp = (block >> 24) & 0xff;
+	cfis->lba_high = (block >> 16) & 0xff;
+	cfis->lba_mid = (block >> 8) & 0xff;
+	cfis->lba_low = block & 0xff;
+
+	cfis->device = ATA_LBA;
+	cfis->features_exp = (blkcnt >> 8) & 0xff;
+	cfis->features = blkcnt & 0xff;
+
+	if (sata->queue_depth >= SATA_HC_MAX_CMD)
+		ncq_channel = SATA_HC_MAX_CMD - 1;
+	else
+		ncq_channel = sata->queue_depth - 1;
+
+	/* Use the latest queue */
+	fsl_sata_exec_cmd(sata, cfis, CMD_NCQ, ncq_channel, buffer, ATA_SECT_SIZE * blkcnt);
+	return blkcnt;
+}
+
+void fsl_sata_flush_cache_ext(int dev)
+{
+	fsl_sata_t *sata = (fsl_sata_t *)sata_dev_desc[dev].priv;
+	struct sata_fis_h2d h2d;
+	struct cfis *cfis;
+
+	cfis = (struct cfis *)&h2d;
+
+	memset((void *)cfis, 0, sizeof(struct cfis));
+
+	cfis->fis_type = SATA_FIS_TYPE_REGISTER_H2D;
+	cfis->pm_port_c = 0x80; /* is command */
+	cfis->command = ATA_CMD_FLUSH_CACHE_EXT;
+
+	fsl_sata_exec_cmd(sata, cfis, CMD_ATA, 0, NULL, 0);
+}
+
+/* Software reset, set SRST of the Device Control register */
+void fsl_sata_software_reset(int dev)
+{
+	return;
+}
+
+static void fsl_sata_init_wcache(int dev, u16 *id)
+{
+	fsl_sata_t *sata = (fsl_sata_t *)sata_dev_desc[dev].priv;
+
+	if (ata_id_has_wcache(id) && ata_id_wcache_enabled(id))
+		sata->wcache = 1;
+	if (ata_id_has_flush(id))
+		sata->flush = 1;
+	if (ata_id_has_flush_ext(id))
+		sata->flush_ext = 1;
+}
+
+static int fsl_sata_get_wcache(int dev)
+{
+	fsl_sata_t *sata = (fsl_sata_t *)sata_dev_desc[dev].priv;
+	return sata->wcache;
+}
+
+static int fsl_sata_get_flush(int dev)
+{
+	fsl_sata_t *sata = (fsl_sata_t *)sata_dev_desc[dev].priv;
+	return sata->flush;
+}
+
+static int fsl_sata_get_flush_ext(int dev)
+{
+	fsl_sata_t *sata = (fsl_sata_t *)sata_dev_desc[dev].priv;
+	return sata->flush_ext;
+}
+
+u32 ata_low_level_rw_lba48(int dev, u32 blknr, u32 blkcnt, void *buffer, int is_write)
+{
+	u32 start, blks;
+	u8 *addr;
+	int max_blks;
+
+	start = blknr;
+	blks = blkcnt;
+	addr = (u8 *)buffer;
+
+	max_blks = ATA_MAX_SECTORS_LBA48;
+	do {
+		if (blks > max_blks) {
+			if (fsl_sata_info[dev].flags != FLAGS_FPDMA)
+				fsl_sata_rw_cmd_ext(dev, start, max_blks, addr, is_write);
+			else
+				fsl_sata_rw_ncq_cmd(dev, start, max_blks, addr, is_write);
+			start += max_blks;
+			blks -= max_blks;
+			addr += ATA_SECT_SIZE * max_blks;
+		} else {
+			if (fsl_sata_info[dev].flags != FLAGS_FPDMA)
+				fsl_sata_rw_cmd_ext(dev, start, blks, addr, is_write);
+			else
+				fsl_sata_rw_ncq_cmd(dev, start, blks, addr, is_write);
+			start += blks;
+			blks = 0;
+			addr += ATA_SECT_SIZE * blks;
+		}
+	} while (blks != 0);
+
+	return blkcnt;
+}
+
+u32 ata_low_level_rw_lba28(int dev, u32 blknr, u32 blkcnt, void *buffer, int is_write)
+{
+	u32 start, blks;
+	u8 *addr;
+	int max_blks;
+
+	start = blknr;
+	blks = blkcnt;
+	addr = (u8 *)buffer;
+
+	max_blks = ATA_MAX_SECTORS;
+	do {
+		if (blks > max_blks) {
+			fsl_sata_rw_cmd(dev, start, max_blks, addr, is_write);
+			start += max_blks;
+			blks -= max_blks;
+			addr += ATA_SECT_SIZE * max_blks;
+		} else {
+			fsl_sata_rw_cmd(dev, start, blks, addr, is_write);
+			start += blks;
+			blks = 0;
+			addr += ATA_SECT_SIZE * blks;
+		}
+	} while (blks != 0);
+
+	return blkcnt;
+}
+
+/*
+ * SATA interface between low level driver and command layer
+ */
+ulong sata_read(int dev, u32 blknr, u32 blkcnt, void *buffer)
+{
+	u32 rc;
+
+	if (sata_dev_desc[dev].lba48)
+		rc = ata_low_level_rw_lba48(dev, blknr, blkcnt, buffer, READ_CMD);
+	else
+		rc = ata_low_level_rw_lba28(dev, blknr, blkcnt, buffer, READ_CMD);
+	return rc;
+}
+
+ulong sata_write(int dev, u32 blknr, u32 blkcnt, void *buffer)
+{
+	u32 rc;
+
+	if (sata_dev_desc[dev].lba48) {
+		rc = ata_low_level_rw_lba48(dev, blknr, blkcnt, buffer, WRITE_CMD);
+		if (fsl_sata_get_wcache(dev) && fsl_sata_get_flush_ext(dev))
+			fsl_sata_flush_cache_ext(dev);
+	} else {
+		rc = ata_low_level_rw_lba28(dev, blknr, blkcnt, buffer, WRITE_CMD);
+		if (fsl_sata_get_wcache(dev) && fsl_sata_get_flush(dev))
+			fsl_sata_flush_cache(dev);
+	}
+	return rc;
+}
+
+int scan_sata(int dev)
+{
+	fsl_sata_t *sata = (fsl_sata_t *)sata_dev_desc[dev].priv;
+	unsigned char serial[ATA_ID_SERNO_LEN + 1];
+	unsigned char firmware[ATA_ID_FW_REV_LEN + 1];
+	unsigned char product[ATA_ID_PROD_LEN + 1];
+	u16 *id;
+	u64 n_sectors;
+
+	/* if no detected link */
+	if (!sata->link)
+		return -1;
+
+	id = (u16 *)malloc(ATA_ID_WORDS * 2);
+	if (!id) {
+		printf("id malloc failed\n\r");
+		return -1;
+	}
+
+	/* Identify device to get information */
+	fsl_sata_identify(dev, id);
+
+	/* Serial number */
+	ata_id_c_string(id, serial, ATA_ID_SERNO, sizeof(serial));
+	memcpy(sata_dev_desc[dev].product, serial, sizeof(serial));
+
+	/* Firmware version */
+	ata_id_c_string(id, firmware, ATA_ID_FW_REV, sizeof(firmware));
+	memcpy(sata_dev_desc[dev].revision, firmware, sizeof(firmware));
+
+	/* Product model */
+	ata_id_c_string(id, product, ATA_ID_PROD, sizeof(product));
+	memcpy(sata_dev_desc[dev].vendor, product, sizeof(product));
+
+	/* Totoal sectors */
+	n_sectors = ata_id_n_sectors(id);
+	sata_dev_desc[dev].lba = (u32)n_sectors;
+
+	/* Check if support LBA48 */
+	if (ata_id_has_lba48(id)) {
+		sata_dev_desc[dev].lba48 = 1;
+		debug("Device support LBA48\n\r");
+	}
+
+	/* Get the NCQ queue depth from device */
+	sata->queue_depth = ata_id_queue_depth(id);
+
+	/* Get the xfer mode from device */
+	fsl_sata_xfer_mode(dev, id);
+
+	/* Get the write cache status from device */
+	fsl_sata_init_wcache(dev, id);
+
+	/* Set the xfer mode to highest speed */
+	fsl_sata_set_features(dev);
+#ifdef DEBUG
+	fsl_sata_identify(dev, id);
+	ata_dump_id(id);
+#endif
+	free((void *)id);
+	return 0;
+}