ata: add the libata support

add simple libata support in u-boot

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

3 files changed, 364 insertions, 0 deletions

diff --git a/drivers/block/Makefile b/drivers/block/Makefile
index e069969..d63ca2d 100644
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@ -27,6 +27,7 @@ LIB 	:= $(obj)libblock.a
 
 COBJS-y += ahci.o
 COBJS-y += ata_piix.o
+COBJS-$(CONFIG_LIBATA) += libata.o
 COBJS-y += sil680.o
 COBJS-y += sym53c8xx.o
 COBJS-y += systemace.o
diff --git a/drivers/block/libata.c b/drivers/block/libata.c
new file mode 100644
index 0000000..a0cf90d
--- /dev/null
+++ b/drivers/block/libata.c
@@ -0,0 +1,158 @@
+/*
+ * Copyright (C) 2008 Freescale Semiconductor, Inc.
+ *		Dave Liu <daveliu@freescale.com>
+ *		port from the libata of linux kernel
+ *
+ * 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 <libata.h>
+
+u64 ata_id_n_sectors(u16 *id)
+{
+	if (ata_id_has_lba(id)) {
+		if (ata_id_has_lba48(id))
+			return ata_id_u64(id, ATA_ID_LBA48_SECTORS);
+		else
+			return ata_id_u32(id, ATA_ID_LBA_SECTORS);
+	} else {
+		return 0;
+	}
+}
+
+u32 ata_dev_classify(u32 sig)
+{
+	u8 lbam, lbah;
+
+	lbam = (sig >> 16) & 0xff;
+	lbah = (sig >> 24) & 0xff;
+
+	if (((lbam == 0) && (lbah == 0)) ||
+		((lbam == 0x3c) && (lbah == 0xc3)))
+		return ATA_DEV_ATA;
+
+	if ((lbam == 0x14) && (lbah == 0xeb))
+		return ATA_DEV_ATAPI;
+
+	if ((lbam == 0x69) && (lbah == 0x96))
+		return ATA_DEV_PMP;
+
+	return ATA_DEV_UNKNOWN;
+}
+
+static void ata_id_string(const u16 *id, unsigned char *s,
+			 unsigned int ofs, unsigned int len)
+{
+	unsigned int c;
+
+	while (len > 0) {
+		c = id[ofs] >> 8;
+		*s = c;
+		s++;
+
+		c = id[ofs] & 0xff;
+		*s = c;
+		s++;
+
+		ofs++;
+		len -= 2;
+	}
+}
+
+void ata_id_c_string(const u16 *id, unsigned char *s,
+			 unsigned int ofs, unsigned int len)
+{
+	unsigned char *p;
+
+	ata_id_string(id, s, ofs, len - 1);
+
+	p = s + strnlen((char *)s, len - 1);
+	while (p > s && p[-1] == ' ')
+		p--;
+	*p = '\0';
+}
+
+void ata_dump_id(u16 *id)
+{
+	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];
+	u64 n_sectors;
+
+	/* Serial number */
+	ata_id_c_string(id, serial, ATA_ID_SERNO, sizeof(serial));
+	printf("S/N: %s\n\r", serial);
+
+	/* Firmware version */
+	ata_id_c_string(id, firmware, ATA_ID_FW_REV, sizeof(firmware));
+	printf("Firmware version: %s\n\r", firmware);
+
+	/* Product model */
+	ata_id_c_string(id, product, ATA_ID_PROD, sizeof(product));
+	printf("Product model number: %s\n\r", product);
+
+	/* Total sectors of device  */
+	n_sectors = ata_id_n_sectors(id);
+	printf("Capablity: %d sectors\n\r", n_sectors);
+
+	printf("id[49]: capabilities ==0x%04x\n"
+		"id[53]: field valid ==0x%04x\n"
+		"id[63]: mwdma ==0x%04x\n"
+		"id[64]: pio ==0x%04x\n"
+		"id[75]: queue depth ==0x%04x\n",
+		id[49],
+		id[53],
+		id[63],
+		id[64],
+		id[75]);
+
+	printf("id[76]: sata capablity ==0x%04x\n"
+		"id[78]: sata features supported ==0x%04x\n"
+		"id[79]: sata features enable ==0x%04x\n",
+		id[76],
+		id[78],
+		id[79]);
+
+	printf("id[80]: major version ==0x%04x\n"
+		"id[81]: minor version ==0x%04x\n"
+		"id[82]: command set supported 1 ==0x%04x\n"
+		"id[83]: command set supported 2 ==0x%04x\n"
+		"id[84]: command set extension ==0x%04x\n",
+		id[80],
+		id[81],
+		id[82],
+		id[83],
+		id[84]);
+	printf("id[85]: command set enable 1 ==0x%04x\n"
+		"id[86]: command set enable 2 ==0x%04x\n"
+		"id[87]: command set default ==0x%04x\n"
+		"id[88]: udma ==0x%04x\n"
+		"id[93]: hardware reset result ==0x%04x\n",
+		id[85],
+		id[86],
+		id[87],
+		id[88],
+		id[93]);
+}
+
+void ata_swap_buf_le16(u16 *buf, unsigned int buf_words)
+{
+	unsigned int i;
+
+	for (i = 0; i < buf_words; i++)
+		buf[i] = le16_to_cpu(buf[i]);
+}
diff --git a/include/libata.h b/include/libata.h
new file mode 100644
index 0000000..a5d1c4f
--- /dev/null
+++ b/include/libata.h
@@ -0,0 +1,205 @@
+/*
+ * Copyright (C) 2008 Freescale Semiconductor, Inc.
+ *		Dave Liu <daveliu@freescale.com>
+ *		port from libata of linux kernel
+ *
+ * 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
+ *
+ */
+
+#ifndef __LIBATA_H__
+#define __LIBATA_H__
+
+#include <common.h>
+
+/* command
+ */
+enum ata_cmd {
+	/* non-NCQ command */
+	ATA_CMD_DEV_RESET		= 0x08, /* ATAPI device reset */
+	ATA_CMD_FLUSH_CACHE		= 0xE7,
+	ATA_CMD_FLUSH_CACHE_EXT		= 0xEA,
+	ATA_CMD_ID_ATA			= 0xEC,
+	ATA_CMD_ID_ATAPI		= 0xA1,
+	ATA_CMD_READ_DMA		= 0xC8,
+	ATA_CMD_READ_DMA_EXT		= 0x25,
+	ATA_CMD_WRITE_DMA		= 0xCA,
+	ATA_CMD_WRITE_DMA_EXT		= 0x35,
+	ATA_CMD_PIO_READ		= 0x20,
+	ATA_CMD_PIO_READ_EXT		= 0x24,
+	ATA_CMD_PIO_WRITE		= 0x30,
+	ATA_CMD_PIO_WRITE_EXT		= 0x34,
+	ATA_CMD_SET_FEATURES		= 0xEF,
+
+	/* NCQ command */
+	ATA_CMD_READ_FPDMA_QUEUED	= 0x60,
+	ATA_CMD_WRITE_FPDMA_QUEUED	= 0x61,
+};
+
+/* SETFEATURES stuff
+ */
+enum ata_set_features {
+	/* SETFEATURES stuff */
+	SETFEATURES_XFER	= 0x03,
+	XFER_UDMA_7		= 0x47,
+	XFER_UDMA_6		= 0x46,
+	XFER_UDMA_5		= 0x45,
+	XFER_UDMA_4		= 0x44,
+	XFER_UDMA_3		= 0x43,
+	XFER_UDMA_2		= 0x42,
+	XFER_UDMA_1		= 0x41,
+	XFER_UDMA_0		= 0x40,
+	XFER_MW_DMA_4		= 0x24, /* CFA only */
+	XFER_MW_DMA_3		= 0x23, /* CFA only */
+	XFER_MW_DMA_2		= 0x22,
+	XFER_MW_DMA_1		= 0x21,
+	XFER_MW_DMA_0		= 0x20,
+	XFER_PIO_6		= 0x0E, /* CFA only */
+	XFER_PIO_5		= 0x0D, /* CFA only */
+	XFER_PIO_4		= 0x0C,
+	XFER_PIO_3		= 0x0B,
+	XFER_PIO_2		= 0x0A,
+	XFER_PIO_1		= 0x09,
+	XFER_PIO_0		= 0x08,
+	XFER_PIO_SLOW		= 0x00,
+
+	SETFEATURES_WC_ON	= 0x02, /* Enable write cache */
+	SETFEATURES_WC_OFF	= 0x82, /* Disable write cache */
+
+	SETFEATURES_SPINUP	= 0x07, /* Spin-up drive */
+};
+
+enum ata_protocol {
+	ATA_PROT_UNKNOWN,	/* unknown */
+	ATA_PROT_NODATA,	/* no data */
+	ATA_PROT_PIO,		/* PIO data xfer */
+	ATA_PROT_DMA,		/* DMA */
+	ATA_PROT_NCQ,		/* NCQ */
+	ATA_PROT_ATAPI,		/* packet command, PIO data xfer */
+	ATA_PROT_ATAPI_NODATA,	/* packet command, no data */
+	ATA_PROT_ATAPI_DMA,	/* packet command, DMA */
+};
+
+enum ata_dev_typed {
+	ATA_DEV_ATA,		/* ATA device */
+	ATA_DEV_ATAPI,		/* ATAPI device */
+	ATA_DEV_PMP,		/* Port Multiplier Port */
+	ATA_DEV_UNKNOWN,	/* unknown */
+};
+
+enum {
+	ATA_SECT_SIZE		= 512,
+	ATA_MAX_SECTORS_128	= 128,
+	ATA_MAX_SECTORS		= 256,
+	ATA_MAX_SECTORS_LBA48	= 65535,
+
+	/* bits in ATA command block registers */
+	ATA_HOB			= (1 << 7),	/* LBA48 selector */
+	ATA_NIEN		= (1 << 1),	/* disable-irq flag */
+	ATA_LBA			= (1 << 6),	/* LBA28 selector */
+	ATA_DEV1		= (1 << 4),	/* Select Device 1 (slave) */
+	ATA_BUSY		= (1 << 7),	/* BSY status bit */
+	ATA_DRDY		= (1 << 6),	/* device ready */
+	ATA_DF			= (1 << 5),	/* device fault */
+	ATA_DRQ			= (1 << 3),	/* data request i/o */
+	ATA_ERR			= (1 << 0),	/* have an error */
+	ATA_SRST		= (1 << 2),	/* software reset */
+	ATA_ICRC		= (1 << 7),	/* interface CRC error */
+	ATA_UNC			= (1 << 6),	/* uncorrectable media error */
+	ATA_IDNF		= (1 << 4),	/* ID not found */
+	ATA_ABORTED		= (1 << 2),	/* command aborted */
+
+	ATA_ID_WORDS		= 256,
+	ATA_ID_SERNO		= 10,
+	ATA_ID_FW_REV		= 23,
+	ATA_ID_PROD		= 27,
+	ATA_ID_FIELD_VALID	= 53,
+	ATA_ID_LBA_SECTORS	= 60,
+	ATA_ID_MWDMA_MODES	= 63,
+	ATA_ID_PIO_MODES	= 64,
+	ATA_ID_QUEUE_DEPTH	= 75,
+	ATA_ID_SATA_CAP		= 76,
+	ATA_ID_SATA_FEATURES	= 78,
+	ATA_ID_SATA_FEATURES_EN	= 79,
+	ATA_ID_MAJOR_VER	= 80,
+	ATA_ID_MINOR_VER	= 81,
+	ATA_ID_UDMA_MODES	= 88,
+	ATA_ID_LBA48_SECTORS	= 100,
+
+	ATA_ID_SERNO_LEN	= 20,
+	ATA_ID_FW_REV_LEN	= 8,
+	ATA_ID_PROD_LEN		= 40,
+
+	ATA_PIO3		= (1 << 0),
+	ATA_PIO4		= ATA_PIO3 | (1 << 1),
+
+	ATA_UDMA0		= (1 << 0),
+	ATA_UDMA1		= ATA_UDMA0 | (1 << 1),
+	ATA_UDMA2		= ATA_UDMA1 | (1 << 2),
+	ATA_UDMA3		= ATA_UDMA2 | (1 << 3),
+	ATA_UDMA4		= ATA_UDMA3 | (1 << 4),
+	ATA_UDMA5		= ATA_UDMA4 | (1 << 5),
+	ATA_UDMA6		= ATA_UDMA5 | (1 << 6),
+	ATA_UDMA7		= ATA_UDMA6 | (1 << 7),
+};
+
+#define ata_id_is_ata(id)		(((id)[0] & (1 << 15)) == 0)
+#define ata_id_wcache_enabled(id)	((id)[85] & (1 << 5))
+#define ata_id_has_fua(id)		((id)[84] & (1 << 6))
+#define ata_id_has_flush(id)		((id)[83] & (1 << 12))
+#define ata_id_has_flush_ext(id)	((id)[83] & (1 << 13))
+#define ata_id_has_lba48(id)		((id)[83] & (1 << 10))
+#define ata_id_has_wcache(id)		((id)[82] & (1 << 5))
+#define ata_id_has_lba(id)		((id)[49] & (1 << 9))
+#define ata_id_has_dma(id)		((id)[49] & (1 << 8))
+#define ata_id_has_ncq(id)		((id)[76] & (1 << 8))
+#define ata_id_queue_depth(id)		(((id)[75] & 0x1f) + 1)
+
+#define ata_id_u32(id,n)        \
+        (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
+#define ata_id_u64(id,n)        \
+        ( ((u64) (id)[(n) + 3] << 48) | \
+          ((u64) (id)[(n) + 2] << 32) | \
+          ((u64) (id)[(n) + 1] << 16) | \
+          ((u64) (id)[(n) + 0]) )
+
+
+static inline unsigned int ata_id_major_version(const u16 *id)
+{
+	unsigned int mver;
+
+	if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
+		return 0;
+
+	for (mver = 14; mver >= 1; mver--)
+		if (id[ATA_ID_MAJOR_VER] & (1 << mver))
+			break;
+	return mver;
+}
+
+static inline int ata_id_is_sata(const u16 *id)
+{
+	return ata_id_major_version(id) >= 5 && id[93] == 0;
+}
+
+u64 ata_id_n_sectors(u16 *id);
+u32 ata_dev_classify(u32 sig);
+void ata_id_c_string(const u16 *id, unsigned char *s,
+			 unsigned int ofs, unsigned int len);
+void ata_dump_id(u16 *id);
+void ata_swap_buf_le16(u16 *buf, unsigned int buf_words);
+
+#endif /* __LIBATA_H__ */