libata.h

umon bootloader source code, support mips cpu.

	void (*exec_command)(struct ata_port *ap, struct ata_taskfile *tf);
	u8   (*check_status)(struct ata_port *ap);
	u8   (*check_altstatus)(struct ata_port *ap);
	u8   (*check_err)(struct ata_port *ap);
	void (*dev_select)(struct ata_port *ap, unsigned int device);

	void (*phy_reset) (struct ata_port *ap);
	void (*post_set_mode) (struct ata_port *ap);

	int (*check_atapi_dma) (struct ata_queued_cmd *qc);

	void (*bmdma_setup) (struct ata_queued_cmd *qc);
	void (*bmdma_start) (struct ata_queued_cmd *qc);

	void (*qc_prep) (struct ata_queued_cmd *qc);
	int (*qc_issue) (struct ata_queued_cmd *qc);

	void (*eng_timeout) (struct ata_port *ap);

	irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
	void (*irq_clear) (struct ata_port *);

	u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
	void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
			   u32 val);

	int (*port_start) (struct ata_port *ap);
	void (*port_stop) (struct ata_port *ap);

	void (*host_stop) (struct ata_host_set *host_set);

	void (*bmdma_stop) (struct ata_port *ap);
	u8   (*bmdma_status) (struct ata_port *ap);
};

struct ata_port_info {
	Scsi_Host_Template	*sht;
	unsigned long		host_flags;
	unsigned long		pio_mask;
	unsigned long		mwdma_mask;
	unsigned long		udma_mask;
	struct ata_port_operations	*port_ops;
};


extern void ata_port_probe(struct ata_port *);
extern void __sata_phy_reset(struct ata_port *ap);
extern void sata_phy_reset(struct ata_port *ap);
extern void ata_bus_reset(struct ata_port *ap);
extern void ata_port_disable(struct ata_port *);
extern void ata_std_ports(struct ata_ioports *ioaddr);
#ifdef CONFIG_PCI
extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
			     unsigned int n_ports);
extern void ata_pci_remove_one (struct pci_dev *pdev);
#endif /* CONFIG_PCI */
extern int ata_device_add(struct ata_probe_ent *ent);
extern int ata_scsi_detect(Scsi_Host_Template *sht);
extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
extern int ata_scsi_error(struct Scsi_Host *host);
extern int ata_scsi_release(struct Scsi_Host *host);
extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
/*
 * Default driver ops implementations
 */
extern void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf);
extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
extern void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp);
extern void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf);
extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
extern u8 ata_check_status(struct ata_port *ap);
extern u8 ata_altstatus(struct ata_port *ap);
extern u8 ata_chk_err(struct ata_port *ap);
extern void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf);
extern int ata_port_start (struct ata_port *ap);
extern void ata_port_stop (struct ata_port *ap);
extern void ata_host_stop (struct ata_host_set *host_set);
extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
extern void ata_qc_prep(struct ata_queued_cmd *qc);
extern int ata_qc_issue_prot(struct ata_queued_cmd *qc);
extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
		unsigned int buflen);
extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
		 unsigned int n_elem);
extern unsigned int ata_dev_classify(struct ata_taskfile *tf);
extern void ata_dev_id_string(u16 *id, unsigned char *s,
			      unsigned int ofs, unsigned int len);
extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
extern void ata_bmdma_start (struct ata_queued_cmd *qc);
extern void ata_bmdma_stop(struct ata_port *ap);
extern u8   ata_bmdma_status(struct ata_port *ap);
extern void ata_bmdma_irq_clear(struct ata_port *ap);
extern void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat);
extern void ata_eng_timeout(struct ata_port *ap);
extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd,
			      void (*done)(struct scsi_cmnd *));
extern int ata_std_bios_param(struct scsi_device *sdev,
			      struct block_device *bdev,
			      sector_t capacity, int geom[]);
extern int ata_scsi_slave_config(struct scsi_device *sdev);


#ifdef CONFIG_PCI
struct pci_bits {
	unsigned int		reg;	/* PCI config register to read */
	unsigned int		width;	/* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
	unsigned long		mask;
	unsigned long		val;
};

extern struct ata_probe_ent *
ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port);
extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits);

#endif /* CONFIG_PCI */


static inline unsigned int ata_tag_valid(unsigned int tag)
{
	return (tag < ATA_MAX_QUEUE) ? 1 : 0;
}

static inline unsigned int ata_dev_present(struct ata_device *dev)
{
	return ((dev->class == ATA_DEV_ATA) ||
		(dev->class == ATA_DEV_ATAPI));
}

static inline u8 ata_chk_status(struct ata_port *ap)
{
	return ap->ops->check_status(ap);
}


/**
 *	ata_pause - Flush writes and pause 400 nanoseconds.
 *	@ap: Port to wait for.
 *
 *	LOCKING:
 *	Inherited from caller.
 */

static inline void ata_pause(struct ata_port *ap)
{
	ata_altstatus(ap);
	ndelay(400);
}


/**
 *	ata_busy_wait - Wait for a port status register
 *	@ap: Port to wait for.
 *
 *	Waits up to max*10 microseconds for the selected bits in the port's
 *	status register to be cleared.
 *	Returns final value of status register.
 *
 *	LOCKING:
 *	Inherited from caller.
 */

static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
			       unsigned int max)
{
	u8 status;

	do {
		udelay(10);
		status = ata_chk_status(ap);
		max--;
	} while ((status & bits) && (max > 0));

	return status;
}


/**
 *	ata_wait_idle - Wait for a port to be idle.
 *	@ap: Port to wait for.
 *
 *	Waits up to 10ms for port's BUSY and DRQ signals to clear.
 *	Returns final value of status register.
 *
 *	LOCKING:
 *	Inherited from caller.
 */

static inline u8 ata_wait_idle(struct ata_port *ap)
{
	u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);

	if (status & (ATA_BUSY | ATA_DRQ)) {
		unsigned long l = ap->ioaddr.status_addr;
		printk(KERN_WARNING
		       "ATA: abnormal status 0x%X on port 0x%lX\n",
		       status, l);
	}

	return status;
}

static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
{
	qc->tf.ctl |= ATA_NIEN;
}

static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap,
						      unsigned int tag)
{
	if (likely(ata_tag_valid(tag)))
		return &ap->qcmd[tag];
	return NULL;
}

static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device)
{
	memset(tf, 0, sizeof(*tf));

	tf->ctl = ap->ctl;
	if (device == 0)
		tf->device = ATA_DEVICE_OBS;
	else
		tf->device = ATA_DEVICE_OBS | ATA_DEV1;
}


/**
 *	ata_irq_on - Enable interrupts on a port.
 *	@ap: Port on which interrupts are enabled.
 *
 *	Enable interrupts on a legacy IDE device using MMIO or PIO,
 *	wait for idle, clear any pending interrupts.
 *
 *	LOCKING:
 *	Inherited from caller.
 */

static inline u8 ata_irq_on(struct ata_port *ap)
{
	struct ata_ioports *ioaddr = &ap->ioaddr;
	u8 tmp;

	ap->ctl &= ~ATA_NIEN;
	ap->last_ctl = ap->ctl;

	if (ap->flags & ATA_FLAG_MMIO)
		writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
	else
		outb(ap->ctl, ioaddr->ctl_addr);
	tmp = ata_wait_idle(ap);

	ap->ops->irq_clear(ap);

	return tmp;
}


/**
 *	ata_irq_ack - Acknowledge a device interrupt.
 *	@ap: Port on which interrupts are enabled.
 *
 *	Wait up to 10 ms for legacy IDE device to become idle (BUSY
 *	or BUSY+DRQ clear).  Obtain dma status and port status from
 *	device.  Clear the interrupt.  Return port status.
 *
 *	LOCKING:
 */

static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
{
	unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
	u8 host_stat, post_stat, status;

	status = ata_busy_wait(ap, bits, 1000);
	if (status & bits)
		DPRINTK("abnormal status 0x%X\n", status);

	/* get controller status; clear intr, err bits */
	if (ap->flags & ATA_FLAG_MMIO) {
		void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
		host_stat = readb(mmio + ATA_DMA_STATUS);
		writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
		       mmio + ATA_DMA_STATUS);

		post_stat = readb(mmio + ATA_DMA_STATUS);
	} else {
		host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
		outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
		     ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);

		post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
	}

	VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
		host_stat, post_stat, status);

	return status;
}

static inline u32 scr_read(struct ata_port *ap, unsigned int reg)
{
	return ap->ops->scr_read(ap, reg);
}

static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val)
{
	ap->ops->scr_write(ap, reg, val);
}

static inline void scr_write_flush(struct ata_port *ap, unsigned int reg, 
				   u32 val)
{
	ap->ops->scr_write(ap, reg, val);
	(void) ap->ops->scr_read(ap, reg);
}

static inline unsigned int sata_dev_present(struct ata_port *ap)
{
	return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;
}

static inline int ata_try_flush_cache(struct ata_device *dev)
{
	return ata_id_wcache_enabled(dev->id) ||
	       ata_id_has_flush(dev->id) ||
	       ata_id_has_flush_ext(dev->id);
}

#endif /* __LINUX_LIBATA_H__ */