ata: add the libata support

add simple libata support in u-boot Signed-off-by: Dave Liu <daveliu@freescale.com>

ata: add the libata support
add simple libata support in u-boot Signed-off-by: Dave Liu <daveliu@freescale.com>
Dave Liu · Wolfgang Denk
1 parent 8e9bb43429
Showing 3 changed files with 364 additions and 0 deletions Side-by-side Diff
drivers/block/Makefile
drivers/block/libata.c
include/libata.h
@@ -27,6 +27,7 @@
  
 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
+/*
+ * 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]);
+}
+/*
+ * 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__ */
...	...	@@ -27,6 +27,7 @@
27	27
28	28	COBJS-y += ahci.o
29	29	COBJS-y += ata_piix.o
	30	+COBJS-$(CONFIG_LIBATA) += libata.o
30	31	COBJS-y += sil680.o
31	32	COBJS-y += sym53c8xx.o
32	33	COBJS-y += systemace.o
	1	+/*
	2	+ * Copyright (C) 2008 Freescale Semiconductor, Inc.
	3	+ * Dave Liu <daveliu@freescale.com>
	4	+ * port from the libata of linux kernel
	5	+ *
	6	+ * This program is free software; you can redistribute it and/or
	7	+ * modify it under the terms of the GNU General Public License as
	8	+ * published by the Free Software Foundation; either version 2 of
	9	+ * the License, or (at your option) any later version.
	10	+ *
	11	+ * This program is distributed in the hope that it will be useful,
	12	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	+ * GNU General Public License for more details.
	15	+ *
	16	+ * You should have received a copy of the GNU General Public License
	17	+ * along with this program; if not, write to the Free Software
	18	+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	19	+ * MA 02111-1307 USA
	20	+ *
	21	+ */
	22	+
	23	+#include <libata.h>
	24	+
	25	+u64 ata_id_n_sectors(u16 *id)
	26	+{
	27	+ if (ata_id_has_lba(id)) {
	28	+ if (ata_id_has_lba48(id))
	29	+ return ata_id_u64(id, ATA_ID_LBA48_SECTORS);
	30	+ else
	31	+ return ata_id_u32(id, ATA_ID_LBA_SECTORS);
	32	+ } else {
	33	+ return 0;
	34	+ }
	35	+}
	36	+
	37	+u32 ata_dev_classify(u32 sig)
	38	+{
	39	+ u8 lbam, lbah;
	40	+
	41	+ lbam = (sig >> 16) & 0xff;
	42	+ lbah = (sig >> 24) & 0xff;
	43	+
	44	+ if (((lbam == 0) && (lbah == 0)) \|\|
	45	+ ((lbam == 0x3c) && (lbah == 0xc3)))
	46	+ return ATA_DEV_ATA;
	47	+
	48	+ if ((lbam == 0x14) && (lbah == 0xeb))
	49	+ return ATA_DEV_ATAPI;
	50	+
	51	+ if ((lbam == 0x69) && (lbah == 0x96))
	52	+ return ATA_DEV_PMP;
	53	+
	54	+ return ATA_DEV_UNKNOWN;
	55	+}
	56	+
	57	+static void ata_id_string(const u16 id, unsigned char s,
	58	+ unsigned int ofs, unsigned int len)
	59	+{
	60	+ unsigned int c;
	61	+
	62	+ while (len > 0) {
	63	+ c = id[ofs] >> 8;
	64	+ *s = c;
	65	+ s++;
	66	+
	67	+ c = id[ofs] & 0xff;
	68	+ *s = c;
	69	+ s++;
	70	+
	71	+ ofs++;
	72	+ len -= 2;
	73	+ }
	74	+}
	75	+
	76	+void ata_id_c_string(const u16 id, unsigned char s,
	77	+ unsigned int ofs, unsigned int len)
	78	+{
	79	+ unsigned char *p;
	80	+
	81	+ ata_id_string(id, s, ofs, len - 1);
	82	+
	83	+ p = s + strnlen((char *)s, len - 1);
	84	+ while (p > s && p[-1] == ' ')
	85	+ p--;
	86	+ *p = '\0';
	87	+}
	88	+
	89	+void ata_dump_id(u16 *id)
	90	+{
	91	+ unsigned char serial[ATA_ID_SERNO_LEN + 1];
	92	+ unsigned char firmware[ATA_ID_FW_REV_LEN + 1];
	93	+ unsigned char product[ATA_ID_PROD_LEN + 1];
	94	+ u64 n_sectors;
	95	+
	96	+ /* Serial number */
	97	+ ata_id_c_string(id, serial, ATA_ID_SERNO, sizeof(serial));
	98	+ printf("S/N: %s\n\r", serial);
	99	+
	100	+ /* Firmware version */
	101	+ ata_id_c_string(id, firmware, ATA_ID_FW_REV, sizeof(firmware));
	102	+ printf("Firmware version: %s\n\r", firmware);
	103	+
	104	+ /* Product model */
	105	+ ata_id_c_string(id, product, ATA_ID_PROD, sizeof(product));
	106	+ printf("Product model number: %s\n\r", product);
	107	+
	108	+ /* Total sectors of device */
	109	+ n_sectors = ata_id_n_sectors(id);
	110	+ printf("Capablity: %d sectors\n\r", n_sectors);
	111	+
	112	+ printf("id[49]: capabilities ==0x%04x\n"
	113	+ "id[53]: field valid ==0x%04x\n"
	114	+ "id[63]: mwdma ==0x%04x\n"
	115	+ "id[64]: pio ==0x%04x\n"
	116	+ "id[75]: queue depth ==0x%04x\n",
	117	+ id[49],
	118	+ id[53],
	119	+ id[63],
	120	+ id[64],
	121	+ id[75]);
	122	+
	123	+ printf("id[76]: sata capablity ==0x%04x\n"
	124	+ "id[78]: sata features supported ==0x%04x\n"
	125	+ "id[79]: sata features enable ==0x%04x\n",
	126	+ id[76],
	127	+ id[78],
	128	+ id[79]);
	129	+
	130	+ printf("id[80]: major version ==0x%04x\n"
	131	+ "id[81]: minor version ==0x%04x\n"
	132	+ "id[82]: command set supported 1 ==0x%04x\n"
	133	+ "id[83]: command set supported 2 ==0x%04x\n"
	134	+ "id[84]: command set extension ==0x%04x\n",
	135	+ id[80],
	136	+ id[81],
	137	+ id[82],
	138	+ id[83],
	139	+ id[84]);
	140	+ printf("id[85]: command set enable 1 ==0x%04x\n"
	141	+ "id[86]: command set enable 2 ==0x%04x\n"
	142	+ "id[87]: command set default ==0x%04x\n"
	143	+ "id[88]: udma ==0x%04x\n"
	144	+ "id[93]: hardware reset result ==0x%04x\n",
	145	+ id[85],
	146	+ id[86],
	147	+ id[87],
	148	+ id[88],
	149	+ id[93]);
	150	+}
	151	+
	152	+void ata_swap_buf_le16(u16 *buf, unsigned int buf_words)
	153	+{
	154	+ unsigned int i;
	155	+
	156	+ for (i = 0; i < buf_words; i++)
	157	+ buf[i] = le16_to_cpu(buf[i]);
	158	+}
	1	+/*
	2	+ * Copyright (C) 2008 Freescale Semiconductor, Inc.
	3	+ * Dave Liu <daveliu@freescale.com>
	4	+ * port from libata of linux kernel
	5	+ *
	6	+ * This program is free software; you can redistribute it and/or
	7	+ * modify it under the terms of the GNU General Public License as
	8	+ * published by the Free Software Foundation; either version 2 of
	9	+ * the License, or (at your option) any later version.
	10	+ *
	11	+ * This program is distributed in the hope that it will be useful,
	12	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	+ * GNU General Public License for more details.
	15	+ *
	16	+ * You should have received a copy of the GNU General Public License
	17	+ * along with this program; if not, write to the Free Software
	18	+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	19	+ * MA 02111-1307 USA
	20	+ *
	21	+ */
	22	+
	23	+#ifndef __LIBATA_H__
	24	+#define __LIBATA_H__
	25	+
	26	+#include <common.h>
	27	+
	28	+/* command
	29	+ */
	30	+enum ata_cmd {
	31	+ /* non-NCQ command */
	32	+ ATA_CMD_DEV_RESET = 0x08, /* ATAPI device reset */
	33	+ ATA_CMD_FLUSH_CACHE = 0xE7,
	34	+ ATA_CMD_FLUSH_CACHE_EXT = 0xEA,
	35	+ ATA_CMD_ID_ATA = 0xEC,
	36	+ ATA_CMD_ID_ATAPI = 0xA1,
	37	+ ATA_CMD_READ_DMA = 0xC8,
	38	+ ATA_CMD_READ_DMA_EXT = 0x25,
	39	+ ATA_CMD_WRITE_DMA = 0xCA,
	40	+ ATA_CMD_WRITE_DMA_EXT = 0x35,
	41	+ ATA_CMD_PIO_READ = 0x20,
	42	+ ATA_CMD_PIO_READ_EXT = 0x24,
	43	+ ATA_CMD_PIO_WRITE = 0x30,
	44	+ ATA_CMD_PIO_WRITE_EXT = 0x34,
	45	+ ATA_CMD_SET_FEATURES = 0xEF,
	46	+
	47	+ /* NCQ command */
	48	+ ATA_CMD_READ_FPDMA_QUEUED = 0x60,
	49	+ ATA_CMD_WRITE_FPDMA_QUEUED = 0x61,
	50	+};
	51	+
	52	+/* SETFEATURES stuff
	53	+ */
	54	+enum ata_set_features {
	55	+ /* SETFEATURES stuff */
	56	+ SETFEATURES_XFER = 0x03,
	57	+ XFER_UDMA_7 = 0x47,
	58	+ XFER_UDMA_6 = 0x46,
	59	+ XFER_UDMA_5 = 0x45,
	60	+ XFER_UDMA_4 = 0x44,
	61	+ XFER_UDMA_3 = 0x43,
	62	+ XFER_UDMA_2 = 0x42,
	63	+ XFER_UDMA_1 = 0x41,
	64	+ XFER_UDMA_0 = 0x40,
	65	+ XFER_MW_DMA_4 = 0x24, /* CFA only */
	66	+ XFER_MW_DMA_3 = 0x23, /* CFA only */
	67	+ XFER_MW_DMA_2 = 0x22,
	68	+ XFER_MW_DMA_1 = 0x21,
	69	+ XFER_MW_DMA_0 = 0x20,
	70	+ XFER_PIO_6 = 0x0E, /* CFA only */
	71	+ XFER_PIO_5 = 0x0D, /* CFA only */
	72	+ XFER_PIO_4 = 0x0C,
	73	+ XFER_PIO_3 = 0x0B,
	74	+ XFER_PIO_2 = 0x0A,
	75	+ XFER_PIO_1 = 0x09,
	76	+ XFER_PIO_0 = 0x08,
	77	+ XFER_PIO_SLOW = 0x00,
	78	+
	79	+ SETFEATURES_WC_ON = 0x02, /* Enable write cache */
	80	+ SETFEATURES_WC_OFF = 0x82, /* Disable write cache */
	81	+
	82	+ SETFEATURES_SPINUP = 0x07, /* Spin-up drive */
	83	+};
	84	+
	85	+enum ata_protocol {
	86	+ ATA_PROT_UNKNOWN, /* unknown */
	87	+ ATA_PROT_NODATA, /* no data */
	88	+ ATA_PROT_PIO, /* PIO data xfer */
	89	+ ATA_PROT_DMA, /* DMA */
	90	+ ATA_PROT_NCQ, /* NCQ */
	91	+ ATA_PROT_ATAPI, /* packet command, PIO data xfer */
	92	+ ATA_PROT_ATAPI_NODATA, /* packet command, no data */
	93	+ ATA_PROT_ATAPI_DMA, /* packet command, DMA */
	94	+};
	95	+
	96	+enum ata_dev_typed {
	97	+ ATA_DEV_ATA, /* ATA device */
	98	+ ATA_DEV_ATAPI, /* ATAPI device */
	99	+ ATA_DEV_PMP, /* Port Multiplier Port */
	100	+ ATA_DEV_UNKNOWN, /* unknown */
	101	+};
	102	+
	103	+enum {
	104	+ ATA_SECT_SIZE = 512,
	105	+ ATA_MAX_SECTORS_128 = 128,
	106	+ ATA_MAX_SECTORS = 256,
	107	+ ATA_MAX_SECTORS_LBA48 = 65535,
	108	+
	109	+ /* bits in ATA command block registers */
	110	+ ATA_HOB = (1 << 7), /* LBA48 selector */
	111	+ ATA_NIEN = (1 << 1), /* disable-irq flag */
	112	+ ATA_LBA = (1 << 6), /* LBA28 selector */
	113	+ ATA_DEV1 = (1 << 4), /* Select Device 1 (slave) */
	114	+ ATA_BUSY = (1 << 7), /* BSY status bit */
	115	+ ATA_DRDY = (1 << 6), /* device ready */
	116	+ ATA_DF = (1 << 5), /* device fault */
	117	+ ATA_DRQ = (1 << 3), /* data request i/o */
	118	+ ATA_ERR = (1 << 0), /* have an error */
	119	+ ATA_SRST = (1 << 2), /* software reset */
	120	+ ATA_ICRC = (1 << 7), /* interface CRC error */
	121	+ ATA_UNC = (1 << 6), /* uncorrectable media error */
	122	+ ATA_IDNF = (1 << 4), /* ID not found */
	123	+ ATA_ABORTED = (1 << 2), /* command aborted */
	124	+
	125	+ ATA_ID_WORDS = 256,
	126	+ ATA_ID_SERNO = 10,
	127	+ ATA_ID_FW_REV = 23,
	128	+ ATA_ID_PROD = 27,
	129	+ ATA_ID_FIELD_VALID = 53,
	130	+ ATA_ID_LBA_SECTORS = 60,
	131	+ ATA_ID_MWDMA_MODES = 63,
	132	+ ATA_ID_PIO_MODES = 64,
	133	+ ATA_ID_QUEUE_DEPTH = 75,
	134	+ ATA_ID_SATA_CAP = 76,
	135	+ ATA_ID_SATA_FEATURES = 78,
	136	+ ATA_ID_SATA_FEATURES_EN = 79,
	137	+ ATA_ID_MAJOR_VER = 80,
	138	+ ATA_ID_MINOR_VER = 81,
	139	+ ATA_ID_UDMA_MODES = 88,
	140	+ ATA_ID_LBA48_SECTORS = 100,
	141	+
	142	+ ATA_ID_SERNO_LEN = 20,
	143	+ ATA_ID_FW_REV_LEN = 8,
	144	+ ATA_ID_PROD_LEN = 40,
	145	+
	146	+ ATA_PIO3 = (1 << 0),
	147	+ ATA_PIO4 = ATA_PIO3 \| (1 << 1),
	148	+
	149	+ ATA_UDMA0 = (1 << 0),
	150	+ ATA_UDMA1 = ATA_UDMA0 \| (1 << 1),
	151	+ ATA_UDMA2 = ATA_UDMA1 \| (1 << 2),
	152	+ ATA_UDMA3 = ATA_UDMA2 \| (1 << 3),
	153	+ ATA_UDMA4 = ATA_UDMA3 \| (1 << 4),
	154	+ ATA_UDMA5 = ATA_UDMA4 \| (1 << 5),
	155	+ ATA_UDMA6 = ATA_UDMA5 \| (1 << 6),
	156	+ ATA_UDMA7 = ATA_UDMA6 \| (1 << 7),
	157	+};
	158	+
	159	+#define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0)
	160	+#define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5))
	161	+#define ata_id_has_fua(id) ((id)[84] & (1 << 6))
	162	+#define ata_id_has_flush(id) ((id)[83] & (1 << 12))
	163	+#define ata_id_has_flush_ext(id) ((id)[83] & (1 << 13))
	164	+#define ata_id_has_lba48(id) ((id)[83] & (1 << 10))
	165	+#define ata_id_has_wcache(id) ((id)[82] & (1 << 5))
	166	+#define ata_id_has_lba(id) ((id)[49] & (1 << 9))
	167	+#define ata_id_has_dma(id) ((id)[49] & (1 << 8))
	168	+#define ata_id_has_ncq(id) ((id)[76] & (1 << 8))
	169	+#define ata_id_queue_depth(id) (((id)[75] & 0x1f) + 1)
	170	+
	171	+#define ata_id_u32(id,n) \
	172	+ (((u32) (id)[(n) + 1] << 16) \| ((u32) (id)[(n)]))
	173	+#define ata_id_u64(id,n) \
	174	+ ( ((u64) (id)[(n) + 3] << 48) \| \
	175	+ ((u64) (id)[(n) + 2] << 32) \| \
	176	+ ((u64) (id)[(n) + 1] << 16) \| \
	177	+ ((u64) (id)[(n) + 0]) )
	178	+
	179	+
	180	+static inline unsigned int ata_id_major_version(const u16 *id)
	181	+{
	182	+ unsigned int mver;
	183	+
	184	+ if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
	185	+ return 0;
	186	+
	187	+ for (mver = 14; mver >= 1; mver--)
	188	+ if (id[ATA_ID_MAJOR_VER] & (1 << mver))
	189	+ break;
	190	+ return mver;
	191	+}
	192	+
	193	+static inline int ata_id_is_sata(const u16 *id)
	194	+{
	195	+ return ata_id_major_version(id) >= 5 && id[93] == 0;
	196	+}
	197	+
	198	+u64 ata_id_n_sectors(u16 *id);
	199	+u32 ata_dev_classify(u32 sig);
	200	+void ata_id_c_string(const u16 id, unsigned char s,
	201	+ unsigned int ofs, unsigned int len);
	202	+void ata_dump_id(u16 *id);
	203	+void ata_swap_buf_le16(u16 *buf, unsigned int buf_words);
	204	+
	205	+#endif /* __LIBATA_H__ */