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Diffstat (limited to 'include/linux/ata.h')
| -rw-r--r-- | include/linux/ata.h | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h new file mode 100644 index 000000000000..f178894edd04 --- /dev/null +++ b/include/linux/ata.h @@ -0,0 +1,268 @@ + +/* + Copyright 2003-2004 Red Hat, Inc. All rights reserved. + Copyright 2003-2004 Jeff Garzik + + The contents of this file are subject to the Open + Software License version 1.1 that can be found at + http://www.opensource.org/licenses/osl-1.1.txt and is included herein + by reference. + + Alternatively, the contents of this file may be used under the terms + of the GNU General Public License version 2 (the "GPL") as distributed + in the kernel source COPYING file, in which case the provisions of + the GPL are applicable instead of the above. If you wish to allow + the use of your version of this file only under the terms of the + GPL and not to allow others to use your version of this file under + the OSL, indicate your decision by deleting the provisions above and + replace them with the notice and other provisions required by the GPL. + If you do not delete the provisions above, a recipient may use your + version of this file under either the OSL or the GPL. + + */ + +#ifndef __LINUX_ATA_H__ +#define __LINUX_ATA_H__ + +#include <linux/types.h> + +/* defines only for the constants which don't work well as enums */ +#define ATA_DMA_BOUNDARY 0xffffUL +#define ATA_DMA_MASK 0xffffffffULL + +enum { + /* various global constants */ + ATA_MAX_DEVICES = 2, /* per bus/port */ + ATA_MAX_PRD = 256, /* we could make these 256/256 */ + ATA_SECT_SIZE = 512, + + ATA_ID_WORDS = 256, + ATA_ID_PROD_OFS = 27, + ATA_ID_FW_REV_OFS = 23, + ATA_ID_SERNO_OFS = 10, + ATA_ID_MAJOR_VER = 80, + ATA_ID_PIO_MODES = 64, + ATA_ID_MWDMA_MODES = 63, + ATA_ID_UDMA_MODES = 88, + ATA_ID_PIO4 = (1 << 1), + + ATA_PCI_CTL_OFS = 2, + ATA_SERNO_LEN = 20, + 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), + /* ATA_UDMA7 is just for completeness... doesn't exist (yet?). */ + + ATA_UDMA_MASK_40C = ATA_UDMA2, /* udma0-2 */ + + /* DMA-related */ + ATA_PRD_SZ = 8, + ATA_PRD_TBL_SZ = (ATA_MAX_PRD * ATA_PRD_SZ), + ATA_PRD_EOT = (1 << 31), /* end-of-table flag */ + + ATA_DMA_TABLE_OFS = 4, + ATA_DMA_STATUS = 2, + ATA_DMA_CMD = 0, + ATA_DMA_WR = (1 << 3), + ATA_DMA_START = (1 << 0), + ATA_DMA_INTR = (1 << 2), + ATA_DMA_ERR = (1 << 1), + ATA_DMA_ACTIVE = (1 << 0), + + /* 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_DEVICE_OBS = (1 << 7) | (1 << 5), /* obs bits in dev reg */ + ATA_DEVCTL_OBS = (1 << 3), /* obsolete bit in devctl reg */ + 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_ABORTED = (1 << 2), /* command aborted */ + + /* ATA command block registers */ + ATA_REG_DATA = 0x00, + ATA_REG_ERR = 0x01, + ATA_REG_NSECT = 0x02, + ATA_REG_LBAL = 0x03, + ATA_REG_LBAM = 0x04, + ATA_REG_LBAH = 0x05, + ATA_REG_DEVICE = 0x06, + ATA_REG_STATUS = 0x07, + + ATA_REG_FEATURE = ATA_REG_ERR, /* and their aliases */ + ATA_REG_CMD = ATA_REG_STATUS, + ATA_REG_BYTEL = ATA_REG_LBAM, + ATA_REG_BYTEH = ATA_REG_LBAH, + ATA_REG_DEVSEL = ATA_REG_DEVICE, + ATA_REG_IRQ = ATA_REG_NSECT, + + /* ATA device commands */ + ATA_CMD_CHK_POWER = 0xE5, /* check power mode */ + ATA_CMD_EDD = 0x90, /* execute device diagnostic */ + ATA_CMD_FLUSH = 0xE7, + ATA_CMD_FLUSH_EXT = 0xEA, + ATA_CMD_ID_ATA = 0xEC, + ATA_CMD_ID_ATAPI = 0xA1, + ATA_CMD_READ = 0xC8, + ATA_CMD_READ_EXT = 0x25, + ATA_CMD_WRITE = 0xCA, + ATA_CMD_WRITE_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, + ATA_CMD_PACKET = 0xA0, + ATA_CMD_VERIFY = 0x40, + ATA_CMD_VERIFY_EXT = 0x42, + + /* 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_2 = 0x22, + XFER_MW_DMA_1 = 0x21, + XFER_MW_DMA_0 = 0x20, + XFER_PIO_4 = 0x0C, + XFER_PIO_3 = 0x0B, + XFER_PIO_2 = 0x0A, + XFER_PIO_1 = 0x09, + XFER_PIO_0 = 0x08, + XFER_SW_DMA_2 = 0x12, + XFER_SW_DMA_1 = 0x11, + XFER_SW_DMA_0 = 0x10, + XFER_PIO_SLOW = 0x00, + + /* ATAPI stuff */ + ATAPI_PKT_DMA = (1 << 0), + ATAPI_DMADIR = (1 << 2), /* ATAPI data dir: + 0=to device, 1=to host */ + ATAPI_CDB_LEN = 16, + + /* cable types */ + ATA_CBL_NONE = 0, + ATA_CBL_PATA40 = 1, + ATA_CBL_PATA80 = 2, + ATA_CBL_PATA_UNK = 3, + ATA_CBL_SATA = 4, + + /* SATA Status and Control Registers */ + SCR_STATUS = 0, + SCR_ERROR = 1, + SCR_CONTROL = 2, + SCR_ACTIVE = 3, + SCR_NOTIFICATION = 4, + + /* struct ata_taskfile flags */ + ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */ + ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */ + ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */ + ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */ +}; + +enum ata_tf_protocols { + /* ATA taskfile protocols */ + ATA_PROT_UNKNOWN, /* unknown/invalid */ + ATA_PROT_NODATA, /* no data */ + ATA_PROT_PIO, /* PIO single sector */ + ATA_PROT_PIO_MULT, /* PIO multiple sector */ + ATA_PROT_DMA, /* DMA */ + ATA_PROT_ATAPI, /* packet command, PIO data xfer*/ + ATA_PROT_ATAPI_NODATA, /* packet command, no data */ + ATA_PROT_ATAPI_DMA, /* packet command with special DMA sauce */ +}; + +enum ata_ioctls { + ATA_IOC_GET_IO32 = 0x309, + ATA_IOC_SET_IO32 = 0x324, +}; + +/* core structures */ + +struct ata_prd { + u32 addr; + u32 flags_len; +}; + +struct ata_taskfile { + unsigned long flags; /* ATA_TFLAG_xxx */ + u8 protocol; /* ATA_PROT_xxx */ + + u8 ctl; /* control reg */ + + u8 hob_feature; /* additional data */ + u8 hob_nsect; /* to support LBA48 */ + u8 hob_lbal; + u8 hob_lbam; + u8 hob_lbah; + + u8 feature; + u8 nsect; + u8 lbal; + u8 lbam; + u8 lbah; + + u8 device; + + u8 command; /* IO operation */ +}; + +#define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0) +#define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6)) +#define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5)) +#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_pm(id) ((id)[82] & (1 << 3)) +#define ata_id_has_lba(id) ((id)[49] & (1 << 9)) +#define ata_id_has_dma(id) ((id)[49] & (1 << 8)) +#define ata_id_removeable(id) ((id)[0] & (1 << 7)) +#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 int atapi_cdb_len(u16 *dev_id) +{ + u16 tmp = dev_id[0] & 0x3; + switch (tmp) { + case 0: return 12; + case 1: return 16; + default: return -1; + } +} + +static inline int is_atapi_taskfile(struct ata_taskfile *tf) +{ + return (tf->protocol == ATA_PROT_ATAPI) || + (tf->protocol == ATA_PROT_ATAPI_NODATA) || + (tf->protocol == ATA_PROT_ATAPI_DMA); +} + +static inline int ata_ok(u8 status) +{ + return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR)) + == ATA_DRDY); +} + +#endif /* __LINUX_ATA_H__ */ |