ide.h

Linux Kernel 2.6.9 for OMAP1710

 * 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);

/*
 * Return the current idea about the total capacity of this drive.
 */
extern sector_t current_capacity (ide_drive_t *drive);

/*
 * 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);

extern void try_to_flush_leftover_data(ide_drive_t *);

/*
 * 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 *);

/* (ide_drive_t *drive, u8 *buf) */
extern int ide_wait_cmd_task(ide_drive_t *, 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;

typedef struct pkt_task_s {
/*
 *	struct hd_drive_task_hdr	pktf;
 *	task_struct_t		pktf;
 *	u8			pkcdb[12];
 */
	task_ioreg_t		tfRegister[8];
	int			data_phase;
	int			command_type;
	ide_handler_t		*handler;
	struct request		*rq;		/* copy of request */
	void			*special;
} pkt_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 void ata_input_data(ide_drive_t *, void *, u32);
extern void ata_output_data(ide_drive_t *, void *, u32);
extern void atapi_input_bytes(ide_drive_t *, void *, u32);
extern void atapi_output_bytes(ide_drive_t *, void *, u32);
extern void taskfile_input_data(ide_drive_t *, void *, u32);
extern void taskfile_output_data(ide_drive_t *, void *, u32);

#define IDE_PIO_IN	0
#define IDE_PIO_OUT	1

static inline void __task_sectors(ide_drive_t *drive, char *buf,
				  unsigned nsect, unsigned rw)
{
	/*
	 * IRQ can happen instantly after reading/writing
	 * last sector of the datablock.
	 */
	if (rw == IDE_PIO_OUT)
		taskfile_output_data(drive, buf, nsect * SECTOR_WORDS);
	else
		taskfile_input_data(drive, buf, nsect * SECTOR_WORDS);
}

#ifdef CONFIG_IDE_TASKFILE_IO
static inline void task_bio_sectors(ide_drive_t *drive, struct request *rq,
				    unsigned nsect, unsigned rw)
{
	unsigned long flags;
	char *buf = rq_map_buffer(rq, &flags);

	process_that_request_first(rq, nsect);
	__task_sectors(drive, buf, nsect, rw);
	rq_unmap_buffer(buf, &flags);
}
#endif /* CONFIG_IDE_TASKFILE_IO */

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 ide_startstop_t task_out_intr(ide_drive_t *);

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 u8 ide_auto_reduce_xfer(ide_drive_t *);
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_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, sector_t block);

/*
 * ide_system_bus_speed() returns what we think is the system VESA/PCI
 * bus speed (in MHz).  This is used for calculating interface PIO timings.
 * The default is 40 for known PCI systems, 50 otherwise.
 * The "idebus=xx" parameter can be used to override this value.
 */
extern int ide_system_bus_speed(void);

/*
 * 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);

extern struct block_device_operations ide_fops[];
extern ide_proc_entry_t generic_subdriver_entries[];

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);
extern void ide_pci_setup_ports(struct pci_dev *dev, struct ide_pci_device_s *d, int autodma, int pciirq, ata_index_t *index);
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_MASTER	= (1 << 1),
	IDEPCI_FLAG_FORCE_PDC		= (1 << 2),
};

typedef struct ide_pci_device_s {
	char			*name;
	void			(*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);
	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 void ide_setup_pci_device(struct pci_dev *, ide_pci_device_t *);
extern void ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, ide_pci_device_t *);

#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_dma_off(ide_drive_t *);

#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
extern int ide_build_sglist(ide_drive_t *, struct request *);
extern int ide_raw_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 ide_startstop_t ide_dma_intr(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_start_dma(ide_hwif_t *, ide_drive_t *, 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_read(ide_drive_t *);
extern int __ide_dma_write(ide_drive_t *);
extern int __ide_dma_begin(ide_drive_t *);
extern int __ide_dma_end(ide_drive_t *);
extern int __ide_dma_test_irq(ide_drive_t *);
extern int __ide_dma_verbose(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_dma_off(ide_drive_t *drive) { return 0; }
#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);

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);
extern byte ide_dump_atapi_status(ide_drive_t *drive, const char *msg, byte stat);

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 */