diff options
Diffstat (limited to 'include/linux/ide.h')
| -rw-r--r-- | include/linux/ide.h | 1516 |
1 files changed, 1516 insertions, 0 deletions
diff --git a/include/linux/ide.h b/include/linux/ide.h new file mode 100644 index 0000000..9cfc099 --- /dev/null +++ b/include/linux/ide.h @@ -0,0 +1,1516 @@ +#ifndef _IDE_H +#define _IDE_H +/* + * linux/include/linux/ide.h + * + * Copyright (C) 1994-2002 Linus Torvalds & authors + */ + +#include <linux/config.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/hdreg.h> +#include <linux/hdsmart.h> +#include <linux/blkdev.h> +#include <linux/proc_fs.h> +#include <linux/interrupt.h> +#include <linux/bitops.h> +#include <linux/bio.h> +#include <linux/device.h> +#include <linux/pci.h> +#include <asm/byteorder.h> +#include <asm/system.h> +#include <asm/io.h> +#include <asm/semaphore.h> + +/* + * This is the multiple IDE interface driver, as evolved from hd.c. + * It supports up to four IDE interfaces, on one or more IRQs (usually 14 & 15). + * There can be up to two drives per interface, as per the ATA-2 spec. + * + * Primary i/f: ide0: major=3; (hda) minor=0; (hdb) minor=64 + * Secondary i/f: ide1: major=22; (hdc or hd1a) minor=0; (hdd or hd1b) minor=64 + * Tertiary i/f: ide2: major=33; (hde) minor=0; (hdf) minor=64 + * Quaternary i/f: ide3: major=34; (hdg) minor=0; (hdh) minor=64 + */ + +/****************************************************************************** + * IDE driver configuration options (play with these as desired): + * + * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary + */ +#define INITIAL_MULT_COUNT 0 /* off=0; on=2,4,8,16,32, etc.. */ + +#ifndef SUPPORT_SLOW_DATA_PORTS /* 1 to support slow data ports */ +#define SUPPORT_SLOW_DATA_PORTS 1 /* 0 to reduce kernel size */ +#endif +#ifndef SUPPORT_VLB_SYNC /* 1 to support weird 32-bit chips */ +#define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */ +#endif +#ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */ +#define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */ +#endif + +#ifndef DISABLE_IRQ_NOSYNC +#define DISABLE_IRQ_NOSYNC 0 +#endif + +/* + * Used to indicate "no IRQ", should be a value that cannot be an IRQ + * number. + */ + +#define IDE_NO_IRQ (-1) + +/* + * "No user-serviceable parts" beyond this point :) + *****************************************************************************/ + +typedef unsigned char byte; /* used everywhere */ + +/* + * Probably not wise to fiddle with these + */ +#define ERROR_MAX 8 /* Max read/write errors per sector */ +#define ERROR_RESET 3 /* Reset controller every 4th retry */ +#define ERROR_RECAL 1 /* Recalibrate every 2nd retry */ + +/* + * Tune flags + */ +#define IDE_TUNE_NOAUTO 2 +#define IDE_TUNE_AUTO 1 +#define IDE_TUNE_DEFAULT 0 + +/* + * state flags + */ + +#define DMA_PIO_RETRY 1 /* retrying in PIO */ + +#define HWIF(drive) ((ide_hwif_t *)((drive)->hwif)) +#define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup)) + +/* + * Definitions for accessing IDE controller registers + */ +#define IDE_NR_PORTS (10) + +#define IDE_DATA_OFFSET (0) +#define IDE_ERROR_OFFSET (1) +#define IDE_NSECTOR_OFFSET (2) +#define IDE_SECTOR_OFFSET (3) +#define IDE_LCYL_OFFSET (4) +#define IDE_HCYL_OFFSET (5) +#define IDE_SELECT_OFFSET (6) +#define IDE_STATUS_OFFSET (7) +#define IDE_CONTROL_OFFSET (8) +#define IDE_IRQ_OFFSET (9) + +#define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET +#define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET + +#define IDE_CONTROL_OFFSET_HOB (7) + +#define IDE_DATA_REG (HWIF(drive)->io_ports[IDE_DATA_OFFSET]) +#define IDE_ERROR_REG (HWIF(drive)->io_ports[IDE_ERROR_OFFSET]) +#define IDE_NSECTOR_REG (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET]) +#define IDE_SECTOR_REG (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET]) +#define IDE_LCYL_REG (HWIF(drive)->io_ports[IDE_LCYL_OFFSET]) +#define IDE_HCYL_REG (HWIF(drive)->io_ports[IDE_HCYL_OFFSET]) +#define IDE_SELECT_REG (HWIF(drive)->io_ports[IDE_SELECT_OFFSET]) +#define IDE_STATUS_REG (HWIF(drive)->io_ports[IDE_STATUS_OFFSET]) +#define IDE_CONTROL_REG (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET]) +#define IDE_IRQ_REG (HWIF(drive)->io_ports[IDE_IRQ_OFFSET]) + +#define IDE_FEATURE_REG IDE_ERROR_REG +#define IDE_COMMAND_REG IDE_STATUS_REG +#define IDE_ALTSTATUS_REG IDE_CONTROL_REG +#define IDE_IREASON_REG IDE_NSECTOR_REG +#define IDE_BCOUNTL_REG IDE_LCYL_REG +#define IDE_BCOUNTH_REG IDE_HCYL_REG + +#define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good)) +#define BAD_R_STAT (BUSY_STAT | ERR_STAT) +#define BAD_W_STAT (BAD_R_STAT | WRERR_STAT) +#define BAD_STAT (BAD_R_STAT | DRQ_STAT) +#define DRIVE_READY (READY_STAT | SEEK_STAT) +#define DATA_READY (DRQ_STAT) + +#define BAD_CRC (ABRT_ERR | ICRC_ERR) + +#define SATA_NR_PORTS (3) /* 16 possible ?? */ + +#define SATA_STATUS_OFFSET (0) +#define SATA_STATUS_REG (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET]) +#define SATA_ERROR_OFFSET (1) +#define SATA_ERROR_REG (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET]) +#define SATA_CONTROL_OFFSET (2) +#define SATA_CONTROL_REG (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET]) + +#define SATA_MISC_OFFSET (0) +#define SATA_MISC_REG (HWIF(drive)->sata_misc[SATA_MISC_OFFSET]) +#define SATA_PHY_OFFSET (1) +#define SATA_PHY_REG (HWIF(drive)->sata_misc[SATA_PHY_OFFSET]) +#define SATA_IEN_OFFSET (2) +#define SATA_IEN_REG (HWIF(drive)->sata_misc[SATA_IEN_OFFSET]) + +/* + * Our Physical Region Descriptor (PRD) table should be large enough + * to handle the biggest I/O request we are likely to see. Since requests + * can have no more than 256 sectors, and since the typical blocksize is + * two or more sectors, we could get by with a limit of 128 entries here for + * the usual worst case. Most requests seem to include some contiguous blocks, + * further reducing the number of table entries required. + * + * The driver reverts to PIO mode for individual requests that exceed + * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling + * 100% of all crazy scenarios here is not necessary. + * + * As it turns out though, we must allocate a full 4KB page for this, + * so the two PRD tables (ide0 & ide1) will each get half of that, + * allowing each to have about 256 entries (8 bytes each) from this. + */ +#define PRD_BYTES 8 +#define PRD_ENTRIES 256 + +/* + * Some more useful definitions + */ +#define PARTN_BITS 6 /* number of minor dev bits for partitions */ +#define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */ +#define SECTOR_SIZE 512 +#define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */ +#define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t))) + +/* + * Timeouts for various operations: + */ +#define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */ +#define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */ +#define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */ +#define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */ +#define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */ +#define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */ + +#define HOST(hwif,chipset) \ +{ \ + return ((hwif)->chipset == chipset) ? 1 : 0; \ +} + +/* + * Check for an interrupt and acknowledge the interrupt status + */ +struct hwif_s; +typedef int (ide_ack_intr_t)(struct hwif_s *); + +#ifndef NO_DMA +#define NO_DMA 255 +#endif + +/* + * hwif_chipset_t is used to keep track of the specific hardware + * chipset used by each IDE interface, if known. + */ +typedef enum { ide_unknown, ide_generic, ide_pci, + ide_cmd640, ide_dtc2278, ide_ali14xx, + ide_qd65xx, ide_umc8672, ide_ht6560b, + ide_rz1000, ide_trm290, + ide_cmd646, ide_cy82c693, ide_4drives, + ide_pmac, ide_etrax100, ide_acorn, + ide_forced +} hwif_chipset_t; + +/* + * Structure to hold all information about the location of this port + */ +typedef struct hw_regs_s { + unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */ + int irq; /* our irq number */ + int dma; /* our dma entry */ + ide_ack_intr_t *ack_intr; /* acknowledge interrupt */ + hwif_chipset_t chipset; +} hw_regs_t; + +/* + * Register new hardware with ide + */ +int ide_register_hw(hw_regs_t *hw, struct hwif_s **hwifp); +int ide_register_hw_with_fixup(hw_regs_t *, struct hwif_s **, void (*)(struct hwif_s *)); + +/* + * Set up hw_regs_t structure before calling ide_register_hw (optional) + */ +void ide_setup_ports( hw_regs_t *hw, + unsigned long base, + int *offsets, + unsigned long ctrl, + unsigned long intr, + ide_ack_intr_t *ack_intr, +#if 0 + ide_io_ops_t *iops, +#endif + int irq); + +static inline void ide_std_init_ports(hw_regs_t *hw, + unsigned long io_addr, + unsigned long ctl_addr) +{ + unsigned int i; + + for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) + hw->io_ports[i] = io_addr++; + + hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr; +} + +#include <asm/ide.h> + +/* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */ +#ifndef IDE_ARCH_OBSOLETE_DEFAULTS +# define ide_default_io_base(index) (0) +# define ide_default_irq(base) (0) +# define ide_init_default_irq(base) (0) +#endif + +/* + * ide_init_hwif_ports() is OBSOLETE and will be removed in 2.7 series. + * New ports shouldn't define IDE_ARCH_OBSOLETE_INIT in <asm/ide.h>. + */ +#ifdef IDE_ARCH_OBSOLETE_INIT +static inline void ide_init_hwif_ports(hw_regs_t *hw, + unsigned long io_addr, + unsigned long ctl_addr, + int *irq) +{ + if (!ctl_addr) + ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr)); + else + ide_std_init_ports(hw, io_addr, ctl_addr); + + if (irq) + *irq = 0; + + hw->io_ports[IDE_IRQ_OFFSET] = 0; + +#ifdef CONFIG_PPC32 + if (ppc_ide_md.ide_init_hwif) + ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq); +#endif +} +#else +static inline void ide_init_hwif_ports(hw_regs_t *hw, + unsigned long io_addr, + unsigned long ctl_addr, + int *irq) +{ + if (io_addr || ctl_addr) + printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__); +} +#endif /* IDE_ARCH_OBSOLETE_INIT */ + +/* Currently only m68k, apus and m8xx need it */ +#ifndef IDE_ARCH_ACK_INTR +# define ide_ack_intr(hwif) (1) +#endif + +/* Currently only Atari needs it */ +#ifndef IDE_ARCH_LOCK +# define ide_release_lock() do {} while (0) +# define ide_get_lock(hdlr, data) do {} while (0) +#endif /* IDE_ARCH_LOCK */ + +/* + * Now for the data we need to maintain per-drive: ide_drive_t + */ + +#define ide_scsi 0x21 +#define ide_disk 0x20 +#define ide_optical 0x7 +#define ide_cdrom 0x5 +#define ide_tape 0x1 +#define ide_floppy 0x0 + +/* + * Special Driver Flags + * + * set_geometry : respecify drive geometry + * recalibrate : seek to cyl 0 + * set_multmode : set multmode count + * set_tune : tune interface for drive + * serviced : service command + * reserved : unused + */ +typedef union { + unsigned all : 8; + struct { +#if defined(__LITTLE_ENDIAN_BITFIELD) + unsigned set_geometry : 1; + unsigned recalibrate : 1; + unsigned set_multmode : 1; + unsigned set_tune : 1; + unsigned serviced : 1; + unsigned reserved : 3; +#elif defined(__BIG_ENDIAN_BITFIELD) + unsigned reserved : 3; + unsigned serviced : 1; + unsigned set_tune : 1; + unsigned set_multmode : 1; + unsigned recalibrate : 1; + unsigned set_geometry : 1; +#else +#error "Please fix <asm/byteorder.h>" +#endif + } b; +} special_t; + +/* + * ATA DATA Register Special. + * ATA NSECTOR Count Register(). + * ATAPI Byte Count Register. + * Channel index ordering pairs. + */ +typedef union { + unsigned all :16; + struct { +#if defined(__LITTLE_ENDIAN_BITFIELD) + unsigned low :8; /* LSB */ + unsigned high :8; /* MSB */ +#elif defined(__BIG_ENDIAN_BITFIELD) + unsigned high :8; /* MSB */ + unsigned low :8; /* LSB */ +#else +#error "Please fix <asm/byteorder.h>" +#endif + } b; +} ata_nsector_t, ata_data_t, atapi_bcount_t, ata_index_t; + +/* + * ATA-IDE Error Register + * + * mark : Bad address mark + * tzero : Couldn't find track 0 + * abrt : Aborted Command + * mcr : Media Change Request + * id : ID field not found + * mce : Media Change Event + * ecc : Uncorrectable ECC error + * bdd : dual meaing + */ +typedef union { + unsigned all :8; + struct { +#if defined(__LITTLE_ENDIAN_BITFIELD) + unsigned mark :1; + unsigned tzero :1; + unsigned abrt :1; + unsigned mcr :1; + unsigned id :1; + unsigned mce :1; + unsigned ecc :1; + unsigned bdd :1; +#elif defined(__BIG_ENDIAN_BITFIELD) + unsigned bdd :1; + unsigned ecc :1; + unsigned mce :1; + unsigned id :1; + unsigned mcr :1; + unsigned abrt :1; + unsigned tzero :1; + unsigned mark :1; +#else +#error "Please fix <asm/byteorder.h>" +#endif + } b; +} ata_error_t; + +/* + * ATA-IDE Select Register, aka Device-Head + * + * head : always zeros here + * unit : drive select number: 0/1 + * bit5 : always 1 + * lba : using LBA instead of CHS + * bit7 : always 1 + */ +typedef union { + unsigned all : 8; + struct { +#if defined(__LITTLE_ENDIAN_BITFIELD) + unsigned head : 4; + unsigned unit : 1; + unsigned bit5 : 1; + unsigned lba : 1; + unsigned bit7 : 1; +#elif defined(__BIG_ENDIAN_BITFIELD) + unsigned bit7 : 1; + unsigned lba : 1; + unsigned bit5 : 1; + unsigned unit : 1; + unsigned head : 4; +#else +#error "Please fix <asm/byteorder.h>" +#endif + } b; +} select_t, ata_select_t; + +/* + * The ATA-IDE Status Register. + * The ATAPI Status Register. + * + * check : Error occurred + * idx : Index Error + * corr : Correctable error occurred + * drq : Data is request by the device + * dsc : Disk Seek Complete : ata + * : Media access command finished : atapi + * df : Device Fault : ata + * : Reserved : atapi + * drdy : Ready, Command Mode Capable : ata + * : Ignored for ATAPI commands : atapi + * bsy : Disk is Busy + * : The device has access to the command block + */ +typedef union { + unsigned all :8; + struct { +#if defined(__LITTLE_ENDIAN_BITFIELD) + unsigned check :1; + unsigned idx :1; + unsigned corr :1; + unsigned drq :1; + unsigned dsc :1; + unsigned df :1; + unsigned drdy :1; + unsigned bsy :1; +#elif defined(__BIG_ENDIAN_BITFIELD) + unsigned bsy :1; + unsigned drdy :1; + unsigned df :1; + unsigned dsc :1; + unsigned drq :1; + unsigned corr :1; + unsigned idx :1; + unsigned check :1; +#else +#error "Please fix <asm/byteorder.h>" +#endif + } b; +} ata_status_t, atapi_status_t; + +/* + * ATA-IDE Control Register + * + * bit0 : Should be set to zero + * nIEN : device INTRQ to host + * SRST : host soft reset bit + * bit3 : ATA-2 thingy, Should be set to 1 + * reserved456 : Reserved + * HOB : 48-bit address ordering, High Ordered Bit + */ +typedef union { + unsigned all : 8; + struct { +#if defined(__LITTLE_ENDIAN_BITFIELD) + unsigned bit0 : 1; + unsigned nIEN : 1; + unsigned SRST : 1; + unsigned bit3 : 1; + unsigned reserved456 : 3; + unsigned HOB : 1; +#elif defined(__BIG_ENDIAN_BITFIELD) + unsigned HOB : 1; + unsigned reserved456 : 3; + unsigned bit3 : 1; + unsigned SRST : 1; + unsigned nIEN : 1; + unsigned bit0 : 1; +#else +#error "Please fix <asm/byteorder.h>" +#endif + } b; +} ata_control_t; + +/* + * ATAPI Feature Register + * + * dma : Using DMA or PIO + * reserved321 : Reserved + * reserved654 : Reserved (Tag Type) + * reserved7 : Reserved + */ +typedef union { + unsigned all :8; + struct { +#if defined(__LITTLE_ENDIAN_BITFIELD) + unsigned dma :1; + unsigned reserved321 :3; + unsigned reserved654 :3; + unsigned reserved7 :1; +#elif defined(__BIG_ENDIAN_BITFIELD) + unsigned reserved7 :1; + unsigned reserved654 :3; + unsigned reserved321 :3; + unsigned dma :1; +#else +#error "Please fix <asm/byteorder.h>" +#endif + } b; +} atapi_feature_t; + +/* + * ATAPI Interrupt Reason Register. + * + * cod : Information transferred is command (1) or data (0) + * io : The device requests us to read (1) or write (0) + * reserved : Reserved + */ +typedef union { + unsigned all :8; + struct { +#if defined(__LITTLE_ENDIAN_BITFIELD) + unsigned cod :1; + unsigned io :1; + unsigned reserved :6; +#elif defined(__BIG_ENDIAN_BITFIELD) + unsigned reserved :6; + unsigned io :1; + unsigned cod :1; +#else +#error "Please fix <asm/byteorder.h>" +#endif + } b; +} atapi_ireason_t; + +/* + * The ATAPI error register. + * + * ili : Illegal Length Indication + * eom : End Of Media Detected + * abrt : Aborted command - As defined by ATA + * mcr : Media Change Requested - As defined by ATA + * sense_key : Sense key of the last failed packet command + */ +typedef union { + unsigned all :8; + struct { +#if defined(__LITTLE_ENDIAN_BITFIELD) + unsigned ili :1; + unsigned eom :1; + unsigned abrt :1; + unsigned mcr :1; + unsigned sense_key :4; +#elif defined(__BIG_ENDIAN_BITFIELD) + unsigned sense_key :4; + unsigned mcr :1; + unsigned abrt :1; + unsigned eom :1; + unsigned ili :1; +#else +#error "Please fix <asm/byteorder.h>" +#endif + } b; +} atapi_error_t; + +/* + * ATAPI floppy Drive Select Register + * + * sam_lun : Logical unit number + * reserved3 : Reserved + * drv : The responding drive will be drive 0 (0) or drive 1 (1) + * one5 : Should be set to 1 + * reserved6 : Reserved + * one7 : Should be set to 1 + */ +typedef union { + unsigned all :8; + struct { +#if defined(__LITTLE_ENDIAN_BITFIELD) + unsigned sam_lun :3; + unsigned reserved3 :1; + unsigned drv :1; + unsigned one5 :1; + unsigned reserved6 :1; + unsigned one7 :1; +#elif defined(__BIG_ENDIAN_BITFIELD) + unsigned one7 :1; + unsigned reserved6 :1; + unsigned one5 :1; + unsigned drv :1; + unsigned reserved3 :1; + unsigned sam_lun :3; +#else +#error "Please fix <asm/byteorder.h>" +#endif + } b; +} atapi_select_t; + +/* + * Status returned from various ide_ functions + */ +typedef enum { + ide_stopped, /* no drive operation was started */ + ide_started, /* a drive operation was started, handler was set */ +} ide_startstop_t; + +struct ide_driver_s; +struct ide_settings_s; + +typedef struct ide_drive_s { + char name[4]; /* drive name, such as "hda" */ + char driver_req[10]; /* requests specific driver */ + + request_queue_t *queue; /* request queue */ + + struct request *rq; /* current request */ + struct ide_drive_s *next; /* circular list of hwgroup drives */ + struct ide_driver_s *driver;/* (ide_driver_t *) */ + void *driver_data; /* extra driver data */ + struct hd_driveid *id; /* drive model identification info */ + struct proc_dir_entry *proc; /* /proc/ide/ directory entry */ + struct ide_settings_s *settings;/* /proc/ide/ drive settings */ + char devfs_name[64]; /* devfs crap */ + + struct hwif_s *hwif; /* actually (ide_hwif_t *) */ + + unsigned long sleep; /* sleep until this time */ + unsigned long service_start; /* time we started last request */ + unsigned long service_time; /* service time of last request */ + unsigned long timeout; /* max time to wait for irq */ + + special_t special; /* special action flags */ + select_t select; /* basic drive/head select reg value */ + + u8 keep_settings; /* restore settings after drive reset */ + u8 autodma; /* device can safely use dma on host */ + u8 using_dma; /* disk is using dma for read/write */ + u8 retry_pio; /* retrying dma capable host in pio */ + u8 state; /* retry state */ + u8 waiting_for_dma; /* dma currently in progress */ + u8 unmask; /* okay to unmask other irqs */ + u8 bswap; /* byte swap data */ + u8 dsc_overlap; /* DSC overlap */ + u8 nice1; /* give potential excess bandwidth */ + + unsigned present : 1; /* drive is physically present */ + unsigned dead : 1; /* device ejected hint */ + unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */ + unsigned noprobe : 1; /* from: hdx=noprobe */ + unsigned removable : 1; /* 1 if need to do check_media_change */ + unsigned attach : 1; /* needed for removable devices */ + unsigned is_flash : 1; /* 1 if probed as flash */ + unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */ + unsigned no_unmask : 1; /* disallow setting unmask bit */ + unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */ + unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */ + unsigned nice0 : 1; /* give obvious excess bandwidth */ + unsigned nice2 : 1; /* give a share in our own bandwidth */ + unsigned doorlocking : 1; /* for removable only: door lock/unlock works */ + unsigned autotune : 2; /* 0=default, 1=autotune, 2=noautotune */ + unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */ + unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */ + unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */ + unsigned addressing; /* : 3; + * 0=28-bit + * 1=48-bit + * 2=48-bit doing 28-bit + * 3=64-bit + */ + unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */ + unsigned sleeping : 1; /* 1=sleeping & sleep field valid */ + unsigned post_reset : 1; + + u8 quirk_list; /* considered quirky, set for a specific host */ + u8 init_speed; /* transfer rate set at boot */ + u8 pio_speed; /* unused by core, used by some drivers for fallback from DMA */ + u8 current_speed; /* current transfer rate set */ + u8 dn; /* now wide spread use */ + u8 wcache; /* status of write cache */ + u8 acoustic; /* acoustic management */ + u8 media; /* disk, cdrom, tape, floppy, ... */ + u8 ctl; /* "normal" value for IDE_CONTROL_REG */ + u8 ready_stat; /* min status value for drive ready */ + u8 mult_count; /* current multiple sector setting */ + u8 mult_req; /* requested multiple sector setting */ + u8 tune_req; /* requested drive tuning setting */ + u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */ + u8 bad_wstat; /* used for ignoring WRERR_STAT */ + u8 nowerr; /* used for ignoring WRERR_STAT */ + u8 sect0; /* offset of first sector for DM6:DDO */ + u8 head; /* "real" number of heads */ + u8 sect; /* "real" sectors per track */ + u8 bios_head; /* BIOS/fdisk/LILO number of heads */ + u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */ + + unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */ + unsigned int cyl; /* "real" number of cyls */ + unsigned int drive_data; /* use by tuneproc/selectproc */ + unsigned int usage; /* current "open()" count for drive */ + unsigned int failures; /* current failure count */ + unsigned int max_failures; /* maximum allowed failure count */ + + u64 capacity64; /* total number of sectors */ + + int lun; /* logical unit */ + int crc_count; /* crc counter to reduce drive speed */ + struct list_head list; + struct device gendev; + struct semaphore gendev_rel_sem; /* to deal with device release() */ +} ide_drive_t; + +#define IDE_CHIPSET_PCI_MASK \ + ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx)) +#define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1) + +struct ide_pci_device_s; + +typedef struct hwif_s { + struct hwif_s *next; /* for linked-list in ide_hwgroup_t */ + struct hwif_s *mate; /* other hwif from same PCI chip */ + struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */ + struct proc_dir_entry *proc; /* /proc/ide/ directory entry */ + + char name[6]; /* name of interface, eg. "ide0" */ + + /* task file registers for pata and sata */ + unsigned long io_ports[IDE_NR_PORTS]; + unsigned long sata_scr[SATA_NR_PORTS]; + unsigned long sata_misc[SATA_NR_PORTS]; + + hw_regs_t hw; /* Hardware info */ + ide_drive_t drives[MAX_DRIVES]; /* drive info */ + + u8 major; /* our major number */ + u8 index; /* 0 for ide0; 1 for ide1; ... */ + u8 channel; /* for dual-port chips: 0=primary, 1=secondary */ + u8 straight8; /* Alan's straight 8 check */ + u8 bus_state; /* power state of the IDE bus */ + + u8 atapi_dma; /* host supports atapi_dma */ + u8 ultra_mask; + u8 mwdma_mask; + u8 swdma_mask; + + hwif_chipset_t chipset; /* sub-module for tuning.. */ + + struct pci_dev *pci_dev; /* for pci chipsets */ + struct ide_pci_device_s *cds; /* chipset device struct */ + + void (*rw_disk)(ide_drive_t *, struct request *); + +#if 0 + ide_hwif_ops_t *hwifops; +#else + /* routine to tune PIO mode for drives */ + void (*tuneproc)(ide_drive_t *, u8); + /* routine to retune DMA modes for drives */ + int (*speedproc)(ide_drive_t *, u8); + /* tweaks hardware to select drive */ + void (*selectproc)(ide_drive_t *); + /* chipset polling based on hba specifics */ + int (*reset_poll)(ide_drive_t *); + /* chipset specific changes to default for device-hba resets */ + void (*pre_reset)(ide_drive_t *); + /* routine to reset controller after a disk reset */ + void (*resetproc)(ide_drive_t *); + /* special interrupt handling for shared pci interrupts */ + void (*intrproc)(ide_drive_t *); + /* special host masking for drive selection */ + void (*maskproc)(ide_drive_t *, int); + /* check host's drive quirk list */ + int (*quirkproc)(ide_drive_t *); + /* driver soft-power interface */ + int (*busproc)(ide_drive_t *, int); +// /* host rate limiter */ +// u8 (*ratemask)(ide_drive_t *); +// /* device rate limiter */ +// u8 (*ratefilter)(ide_drive_t *, u8); +#endif + + void (*ata_input_data)(ide_drive_t *, void *, u32); + void (*ata_output_data)(ide_drive_t *, void *, u32); + + void (*atapi_input_bytes)(ide_drive_t *, void *, u32); + void (*atapi_output_bytes)(ide_drive_t *, void *, u32); + + int (*dma_setup)(ide_drive_t *); + void (*dma_exec_cmd)(ide_drive_t *, u8); + void (*dma_start)(ide_drive_t *); + int (*ide_dma_end)(ide_drive_t *drive); + int (*ide_dma_check)(ide_drive_t *drive); + int (*ide_dma_on)(ide_drive_t *drive); + int (*ide_dma_off_quietly)(ide_drive_t *drive); + int (*ide_dma_test_irq)(ide_drive_t *drive); + int (*ide_dma_host_on)(ide_drive_t *drive); + int (*ide_dma_host_off)(ide_drive_t *drive); + int (*ide_dma_lostirq)(ide_drive_t *drive); + int (*ide_dma_timeout)(ide_drive_t *drive); + + void (*OUTB)(u8 addr, unsigned long port); + void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port); + void (*OUTW)(u16 addr, unsigned long port); + void (*OUTL)(u32 addr, unsigned long port); + void (*OUTSW)(unsigned long port, void *addr, u32 count); + void (*OUTSL)(unsigned long port, void *addr, u32 count); + + u8 (*INB)(unsigned long port); + u16 (*INW)(unsigned long port); + u32 (*INL)(unsigned long port); + void (*INSW)(unsigned long port, void *addr, u32 count); + void (*INSL)(unsigned long port, void *addr, u32 count); + + /* dma physical region descriptor table (cpu view) */ + unsigned int *dmatable_cpu; + /* dma physical region descriptor table (dma view) */ + dma_addr_t dmatable_dma; + /* Scatter-gather list used to build the above */ + struct scatterlist *sg_table; + int sg_max_nents; /* Maximum number of entries in it */ + int sg_nents; /* Current number of entries in it */ + int sg_dma_direction; /* dma transfer direction */ + + /* data phase of the active command (currently only valid for PIO/DMA) */ + int data_phase; + + unsigned int nsect; + unsigned int nleft; + unsigned int cursg; + unsigned int cursg_ofs; + + int mmio; /* hosts iomio (0) or custom (2) select */ + int rqsize; /* max sectors per request */ + int irq; /* our irq number */ + + unsigned long dma_master; /* reference base addr dmabase */ + unsigned long dma_base; /* base addr for dma ports */ + unsigned long dma_command; /* dma command register */ + unsigned long dma_vendor1; /* dma vendor 1 register */ + unsigned long dma_status; /* dma status register */ + unsigned long dma_vendor3; /* dma vendor 3 register */ + unsigned long dma_prdtable; /* actual prd table address */ + unsigned long dma_base2; /* extended base addr for dma ports */ + + unsigned dma_extra; /* extra addr for dma ports */ + unsigned long config_data; /* for use by chipset-specific code */ + unsigned long select_data; /* for use by chipset-specific code */ + + unsigned noprobe : 1; /* don't probe for this interface */ + unsigned present : 1; /* this interface exists */ + unsigned hold : 1; /* this interface is always present */ + unsigned serialized : 1; /* serialized all channel operation */ + unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */ + unsigned reset : 1; /* reset after probe */ + unsigned autodma : 1; /* auto-attempt using DMA at boot */ + unsigned udma_four : 1; /* 1=ATA-66 capable, 0=default */ + unsigned no_lba48 : 1; /* 1 = cannot do LBA48 */ + unsigned no_lba48_dma : 1; /* 1 = cannot do LBA48 DMA */ + unsigned no_dsc : 1; /* 0 default, 1 dsc_overlap disabled */ + unsigned auto_poll : 1; /* supports nop auto-poll */ + unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */ + + struct device gendev; + struct semaphore gendev_rel_sem; /* To deal with device release() */ + + void *hwif_data; /* extra hwif data */ + + unsigned dma; + + void (*led_act)(void *data, int rw); +} ide_hwif_t; + +/* + * internal ide interrupt handler type + */ +typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *); +typedef ide_startstop_t (ide_handler_t)(ide_drive_t *); +typedef int (ide_expiry_t)(ide_drive_t *); + +typedef struct hwgroup_s { + /* irq handler, if active */ + ide_startstop_t (*handler)(ide_drive_t *); + /* irq handler, suspended if active */ + ide_startstop_t (*handler_save)(ide_drive_t *); + /* BOOL: protects all fields below */ + volatile int busy; + /* BOOL: wake us up on timer expiry */ + unsigned int sleeping : 1; + /* BOOL: polling active & poll_timeout field valid */ + unsigned int polling : 1; + /* current drive */ + ide_drive_t *drive; + /* ptr to current hwif in linked-list */ + ide_hwif_t *hwif; + + /* for pci chipsets */ + struct pci_dev *pci_dev; + /* chipset device struct */ + struct ide_pci_device_s *cds; + + /* current request */ + struct request *rq; + /* failsafe timer */ + struct timer_list timer; + /* local copy of current write rq */ + struct request wrq; + /* timeout value during long polls */ + unsigned long poll_timeout; + /* queried upon timeouts */ + int (*expiry)(ide_drive_t *); + /* ide_system_bus_speed */ + int pio_clock; + + unsigned char cmd_buf[4]; +} ide_hwgroup_t; + +/* structure attached to the request for IDE_TASK_CMDS */ + +/* + * configurable drive settings + */ + +#define TYPE_INT 0 +#define TYPE_INTA 1 +#define TYPE_BYTE 2 +#define TYPE_SHORT 3 + +#define SETTING_READ (1 << 0) +#define SETTING_WRITE (1 << 1) +#define SETTING_RW (SETTING_READ | SETTING_WRITE) + +typedef int (ide_procset_t)(ide_drive_t *, int); +typedef struct ide_settings_s { + char *name; + int rw; + int read_ioctl; + int write_ioctl; + int data_type; + int min; + int max; + int mul_factor; + int div_factor; + void *data; + ide_procset_t *set; + int auto_remove; + struct ide_settings_s *next; +} ide_settings_t; + +extern struct semaphore ide_setting_sem; +extern int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set); +extern ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name); +extern int ide_read_setting(ide_drive_t *t, ide_settings_t *setting); +extern int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val); +extern void ide_add_generic_settings(ide_drive_t *drive); + +/* + * /proc/ide interface + */ +typedef struct { + const char *name; + mode_t mode; + read_proc_t *read_proc; + write_proc_t *write_proc; +} ide_proc_entry_t; + +#ifdef CONFIG_PROC_FS +extern struct proc_dir_entry *proc_ide_root; + +extern void proc_ide_create(void); +extern void proc_ide_destroy(void); +extern void create_proc_ide_interfaces(void); +void destroy_proc_ide_interface(ide_hwif_t *); +extern void ide_add_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *, void *); +extern void ide_remove_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *); +read_proc_t proc_ide_read_capacity; +read_proc_t proc_ide_read_geometry; + +#ifdef CONFIG_BLK_DEV_IDEPCI +void ide_pci_create_host_proc(const char *, get_info_t *); +#endif + +/* + * Standard exit stuff: + */ +#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \ +{ \ + len -= off; \ + if (len < count) { \ + *eof = 1; \ + if (len <= 0) \ + return 0; \ + } else \ + len = count; \ + *start = page + off; \ + return len; \ +} +#else +static inline void create_proc_ide_interfaces(void) { ; } +static inline void destroy_proc_ide_interface(ide_hwif_t *hwif) { ; } +#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0; +#endif + +/* + * Power Management step value (rq->pm->pm_step). + * + * The step value starts at 0 (ide_pm_state_start_suspend) for a + * suspend operation or 1000 (ide_pm_state_start_resume) for a + * resume operation. + * + * For each step, the core calls the subdriver start_power_step() first. + * This can return: + * - ide_stopped : In this case, the core calls us back again unless + * step have been set to ide_power_state_completed. + * - ide_started : In this case, the channel is left busy until an + * async event (interrupt) occurs. + * Typically, start_power_step() will issue a taskfile request with + * do_rw_taskfile(). + * + * Upon reception of the interrupt, the core will call complete_power_step() + * with the error code if any. This routine should update the step value + * and return. It should not start a new request. The core will call + * start_power_step for the new step value, unless step have been set to + * ide_power_state_completed. + * + * Subdrivers are expected to define their own additional power + * steps from 1..999 for suspend and from 1001..1999 for resume, + * other values are reserved for future use. + */ + +enum { + ide_pm_state_completed = -1, + ide_pm_state_start_suspend = 0, + ide_pm_state_start_resume = 1000, +}; + +/* + * Subdrivers support. + */ +typedef struct ide_driver_s { + struct module *owner; + const char *name; + const char *version; + u8 media; + unsigned busy : 1; + unsigned supports_dsc_overlap : 1; + int (*cleanup)(ide_drive_t *); + ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t); + int (*end_request)(ide_drive_t *, int, int); + ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8); + ide_startstop_t (*abort)(ide_drive_t *, struct request *rq); + int (*ioctl)(ide_drive_t *, struct inode *, struct file *, unsigned int, unsigned long); + ide_proc_entry_t *proc; + int (*attach)(ide_drive_t *); + void (*ata_prebuilder)(ide_drive_t *); + void (*atapi_prebuilder)(ide_drive_t *); + struct device_driver gen_driver; + struct list_head drives; + struct list_head drivers; +} ide_driver_t; + +#define DRIVER(drive) ((drive)->driver) + +int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long); + +/* + * ide_hwifs[] is the master data structure used to keep track + * of just about everything in ide.c. Whenever possible, routines + * should be using pointers to a drive (ide_drive_t *) or + * pointers to a hwif (ide_hwif_t *), rather than indexing this + * structure directly (the allocation/layout may change!). + * + */ +#ifndef _IDE_C +extern ide_hwif_t ide_hwifs[]; /* master data repository */ +#endif +extern int noautodma; + +extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs); +extern int __ide_end_request (ide_drive_t *drive, struct request *rq, int uptodate, int nrsecs); + +/* + * This is used on exit from the driver to designate the next irq handler + * and also to start the safety timer. + */ +extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry); + +/* + * This is used on exit from the driver to designate the next irq handler + * and start the safety time safely and atomically from the IRQ handler + * with respect to the command issue (which it also does) + */ +extern void ide_execute_command(ide_drive_t *, task_ioreg_t cmd, ide_handler_t *, unsigned int, ide_expiry_t *); + +ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8); + +/* + * ide_error() takes action based on the error returned by the controller. + * The caller should return immediately after invoking this. + * + * (drive, msg, status) + */ +ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat); + +ide_startstop_t __ide_abort(ide_drive_t *, struct request *); + +/* + * Abort a running command on the controller triggering the abort + * from a host side, non error situation + * (drive, msg) + */ +extern ide_startstop_t ide_abort(ide_drive_t *, const char *); + +extern void ide_fix_driveid(struct hd_driveid *); +/* + * ide_fixstring() cleans up and (optionally) byte-swaps a text string, + * removing leading/trailing blanks and compressing internal blanks. + * It is primarily used to tidy up the model name/number fields as + * returned by the WIN_[P]IDENTIFY commands. + * + * (s, bytecount, byteswap) + */ +extern void ide_fixstring(u8 *, const int, const int); + +/* + * This routine busy-waits for the drive status to be not "busy". + * It then checks the status for all of the "good" bits and none + * of the "bad" bits, and if all is okay it returns 0. All other + * cases return 1 after doing "*startstop = ide_error()", and the + * caller should return the updated value of "startstop" in this case. + * "startstop" is unchanged when the function returns 0; + * (startstop, drive, good, bad, timeout) + */ +extern int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long); + +/* + * Start a reset operation for an IDE interface. + * The caller should return immediately after invoking this. + */ +extern ide_startstop_t ide_do_reset (ide_drive_t *); + +/* + * This function is intended to be used prior to invoking ide_do_drive_cmd(). + */ +extern void ide_init_drive_cmd (struct request *rq); + +/* + * this function returns error location sector offset in case of a write error + */ +extern u64 ide_get_error_location(ide_drive_t *, char *); + +/* + * "action" parameter type for ide_do_drive_cmd() below. + */ +typedef enum { + ide_wait, /* insert rq at end of list, and wait for it */ + ide_next, /* insert rq immediately after current request */ + ide_preempt, /* insert rq in front of current request */ + ide_head_wait, /* insert rq in front of current request and wait for it */ + ide_end /* insert rq at end of list, but don't wait for it */ +} ide_action_t; + +/* + * This function issues a special IDE device request + * onto the request queue. + * + * If action is ide_wait, then the rq is queued at the end of the + * request queue, and the function sleeps until it has been processed. + * This is for use when invoked from an ioctl handler. + * + * If action is ide_preempt, then the rq is queued at the head of + * the request queue, displacing the currently-being-processed + * request and this function returns immediately without waiting + * for the new rq to be completed. This is VERY DANGEROUS, and is + * intended for careful use by the ATAPI tape/cdrom driver code. + * + * If action is ide_next, then the rq is queued immediately after + * the currently-being-processed-request (if any), and the function + * returns without waiting for the new rq to be completed. As above, + * This is VERY DANGEROUS, and is intended for careful use by the + * ATAPI tape/cdrom driver code. + * + * If action is ide_end, then the rq is queued at the end of the + * request queue, and the function returns immediately without waiting + * for the new rq to be completed. This is again intended for careful + * use by the ATAPI tape/cdrom driver code. + */ +extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t); + +/* + * Clean up after success/failure of an explicit drive cmd. + * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD). + * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_TASK_MASK). + * + * (ide_drive_t *drive, u8 stat, u8 err) + */ +extern void ide_end_drive_cmd(ide_drive_t *, u8, u8); + +/* + * Issue ATA command and wait for completion. + * Use for implementing commands in kernel + * + * (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf) + */ +extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *); + +typedef struct ide_task_s { +/* + * struct hd_drive_task_hdr tf; + * task_struct_t tf; + * struct hd_drive_hob_hdr hobf; + * hob_struct_t hobf; + */ + task_ioreg_t tfRegister[8]; + task_ioreg_t hobRegister[8]; + ide_reg_valid_t tf_out_flags; + ide_reg_valid_t tf_in_flags; + int data_phase; + int command_type; + ide_pre_handler_t *prehandler; + ide_handler_t *handler; + struct request *rq; /* copy of request */ + void *special; /* valid_t generally */ +} ide_task_t; + +extern u32 ide_read_24(ide_drive_t *); + +extern void SELECT_DRIVE(ide_drive_t *); +extern void SELECT_INTERRUPT(ide_drive_t *); +extern void SELECT_MASK(ide_drive_t *, int); +extern void QUIRK_LIST(ide_drive_t *); + +extern int drive_is_ready(ide_drive_t *); +extern int wait_for_ready(ide_drive_t *, int /* timeout */); + +/* + * taskfile io for disks for now...and builds request from ide_ioctl + */ +extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *); + +/* + * Special Flagged Register Validation Caller + */ +extern ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *); + +extern ide_startstop_t set_multmode_intr(ide_drive_t *); +extern ide_startstop_t set_geometry_intr(ide_drive_t *); +extern ide_startstop_t recal_intr(ide_drive_t *); +extern ide_startstop_t task_no_data_intr(ide_drive_t *); +extern ide_startstop_t task_in_intr(ide_drive_t *); +extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *); + +extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *); + +int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long); +int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long); +int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long); + +extern int system_bus_clock(void); + +extern int ide_driveid_update(ide_drive_t *); +extern int ide_ata66_check(ide_drive_t *, ide_task_t *); +extern int ide_config_drive_speed(ide_drive_t *, u8); +extern u8 eighty_ninty_three (ide_drive_t *); +extern int set_transfer(ide_drive_t *, ide_task_t *); +extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *); + +extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout); + +/* + * ide_stall_queue() can be used by a drive to give excess bandwidth back + * to the hwgroup by sleeping for timeout jiffies. + */ +extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout); + +extern int ide_spin_wait_hwgroup(ide_drive_t *); +extern void ide_timer_expiry(unsigned long); +extern irqreturn_t ide_intr(int irq, void *dev_id, struct pt_regs *regs); +extern void do_ide_request(request_queue_t *); +extern void ide_init_subdrivers(void); + +void ide_init_disk(struct gendisk *, ide_drive_t *); + +extern int ata_attach(ide_drive_t *); + +extern int ideprobe_init(void); + +extern void ide_scan_pcibus(int scan_direction) __init; +extern int ide_pci_register_driver(struct pci_driver *driver); +extern void ide_pci_unregister_driver(struct pci_driver *driver); +void ide_pci_setup_ports(struct pci_dev *, struct ide_pci_device_s *, int, ata_index_t *); +extern void ide_setup_pci_noise (struct pci_dev *dev, struct ide_pci_device_s *d); + +extern void default_hwif_iops(ide_hwif_t *); +extern void default_hwif_mmiops(ide_hwif_t *); +extern void default_hwif_transport(ide_hwif_t *); + +int ide_register_driver(ide_driver_t *driver); +void ide_unregister_driver(ide_driver_t *driver); +int ide_register_subdriver(ide_drive_t *, ide_driver_t *); +int ide_unregister_subdriver (ide_drive_t *drive); +int ide_replace_subdriver(ide_drive_t *drive, const char *driver); + +#define ON_BOARD 1 +#define NEVER_BOARD 0 + +#ifdef CONFIG_BLK_DEV_OFFBOARD +# define OFF_BOARD ON_BOARD +#else /* CONFIG_BLK_DEV_OFFBOARD */ +# define OFF_BOARD NEVER_BOARD +#endif /* CONFIG_BLK_DEV_OFFBOARD */ + +#define NODMA 0 +#define NOAUTODMA 1 +#define AUTODMA 2 + +typedef struct ide_pci_enablebit_s { + u8 reg; /* byte pci reg holding the enable-bit */ + u8 mask; /* mask to isolate the enable-bit */ + u8 val; /* value of masked reg when "enabled" */ +} ide_pci_enablebit_t; + +enum { + /* Uses ISA control ports not PCI ones. */ + IDEPCI_FLAG_ISA_PORTS = (1 << 0), + IDEPCI_FLAG_FORCE_PDC = (1 << 1), +}; + +typedef struct ide_pci_device_s { + char *name; + int (*init_setup)(struct pci_dev *, struct ide_pci_device_s *); + void (*init_setup_dma)(struct pci_dev *, struct ide_pci_device_s *, ide_hwif_t *); + unsigned int (*init_chipset)(struct pci_dev *, const char *); + void (*init_iops)(ide_hwif_t *); + void (*init_hwif)(ide_hwif_t *); + void (*init_dma)(ide_hwif_t *, unsigned long); + void (*fixup)(ide_hwif_t *); + u8 channels; + u8 autodma; + ide_pci_enablebit_t enablebits[2]; + u8 bootable; + unsigned int extra; + struct ide_pci_device_s *next; + u8 flags; +} ide_pci_device_t; + +extern int ide_setup_pci_device(struct pci_dev *, ide_pci_device_t *); +extern int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, ide_pci_device_t *); + +void ide_map_sg(ide_drive_t *, struct request *); +void ide_init_sg_cmd(ide_drive_t *, struct request *); + +#define BAD_DMA_DRIVE 0 +#define GOOD_DMA_DRIVE 1 + +#ifdef CONFIG_BLK_DEV_IDEDMA +int __ide_dma_bad_drive(ide_drive_t *); +int __ide_dma_good_drive(ide_drive_t *); +int ide_use_dma(ide_drive_t *); +int __ide_dma_off(ide_drive_t *); +void ide_dma_verbose(ide_drive_t *); +ide_startstop_t ide_dma_intr(ide_drive_t *); + +#ifdef CONFIG_BLK_DEV_IDEDMA_PCI +extern int ide_build_sglist(ide_drive_t *, struct request *); +extern int ide_build_dmatable(ide_drive_t *, struct request *); +extern void ide_destroy_dmatable(ide_drive_t *); +extern int ide_release_dma(ide_hwif_t *); +extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int); + +extern int __ide_dma_host_off(ide_drive_t *); +extern int __ide_dma_off_quietly(ide_drive_t *); +extern int __ide_dma_host_on(ide_drive_t *); +extern int __ide_dma_on(ide_drive_t *); +extern int __ide_dma_check(ide_drive_t *); +extern int ide_dma_setup(ide_drive_t *); +extern void ide_dma_start(ide_drive_t *); +extern int __ide_dma_end(ide_drive_t *); +extern int __ide_dma_lostirq(ide_drive_t *); +extern int __ide_dma_timeout(ide_drive_t *); +#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */ + +#else +static inline int ide_use_dma(ide_drive_t *drive) { return 0; } +static inline int __ide_dma_off(ide_drive_t *drive) { return 0; } +static inline void ide_dma_verbose(ide_drive_t *drive) { ; } +#endif /* CONFIG_BLK_DEV_IDEDMA */ + +#ifndef CONFIG_BLK_DEV_IDEDMA_PCI +static inline void ide_release_dma(ide_hwif_t *drive) {;} +#endif + +extern int ide_hwif_request_regions(ide_hwif_t *hwif); +extern void ide_hwif_release_regions(ide_hwif_t* hwif); +extern void ide_unregister (unsigned int index); + +void ide_register_region(struct gendisk *); +void ide_unregister_region(struct gendisk *); + +void ide_undecoded_slave(ide_hwif_t *); + +int probe_hwif_init_with_fixup(ide_hwif_t *, void (*)(ide_hwif_t *)); +extern int probe_hwif_init(ide_hwif_t *); + +static inline void *ide_get_hwifdata (ide_hwif_t * hwif) +{ + return hwif->hwif_data; +} + +static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data) +{ + hwif->hwif_data = data; +} + +/* ide-lib.c */ +extern u8 ide_dma_speed(ide_drive_t *drive, u8 mode); +extern u8 ide_rate_filter(u8 mode, u8 speed); +extern int ide_dma_enable(ide_drive_t *drive); +extern char *ide_xfer_verbose(u8 xfer_rate); +extern void ide_toggle_bounce(ide_drive_t *drive, int on); +extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate); + +u8 ide_dump_status(ide_drive_t *, const char *, u8); + +typedef struct ide_pio_timings_s { + int setup_time; /* Address setup (ns) minimum */ + int active_time; /* Active pulse (ns) minimum */ + int cycle_time; /* Cycle time (ns) minimum = (setup + active + recovery) */ +} ide_pio_timings_t; + +typedef struct ide_pio_data_s { + u8 pio_mode; + u8 use_iordy; + u8 overridden; + u8 blacklisted; + unsigned int cycle_time; +} ide_pio_data_t; + +extern u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d); +extern const ide_pio_timings_t ide_pio_timings[6]; + + +extern spinlock_t ide_lock; +extern struct semaphore ide_cfg_sem; +/* + * Structure locking: + * + * ide_cfg_sem and ide_lock together protect changes to + * ide_hwif_t->{next,hwgroup} + * ide_drive_t->next + * + * ide_hwgroup_t->busy: ide_lock + * ide_hwgroup_t->hwif: ide_lock + * ide_hwif_t->mate: constant, no locking + * ide_drive_t->hwif: constant, no locking + */ + +#define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable(); } while (0) + +extern struct bus_type ide_bus_type; + +/* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */ +#define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000) + +/* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */ +#define ide_id_has_flush_cache_ext(id) \ + (((id)->cfs_enable_2 & 0x2400) == 0x2400) + +#endif /* _IDE_H */ |
