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[PATCH] libata: separate out and export sata_port_hardreset()

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Separate out sata_port_hardreset() from sata_std_hardreset().  This
will be used by LLD hardreset implementation and later by PMP.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2006-11-01 17:59:53 +09:00 committed by Jeff Garzik
parent 4aeb0e3283
commit b6103f6d16
2 changed files with 44 additions and 10 deletions
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52
drivers/ata/libata-core.c
View File

@ -2786,9 +2786,9 @@ int ata_std_softreset(struct ata_port *ap, unsigned int *classes)
}
/**
* sata_std_hardreset - reset host port via SATA phy reset
* sata_port_hardreset - reset port via SATA phy reset
* @ap: port to reset
* @class: resulting class of attached device
* @timing: timing parameters { interval, duratinon, timeout } in msec
*
* SATA phy-reset host port using DET bits of SControl register.
*
@ -2798,10 +2798,8 @@ int ata_std_softreset(struct ata_port *ap, unsigned int *classes)
* RETURNS:
* 0 on success, -errno otherwise.
*/
int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing)
{
struct ata_eh_context *ehc = &ap->eh_context;
const unsigned long *timing = sata_ehc_deb_timing(ehc);
u32 scontrol;
int rc;
@ -2814,24 +2812,24 @@ int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
* and Sil3124.
*/
if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
return rc;
goto out;
scontrol = (scontrol & 0x0f0) | 0x304;
if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
return rc;
goto out;
sata_set_spd(ap);
}
/* issue phy wake/reset */
if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
return rc;
goto out;
scontrol = (scontrol & 0x0f0) | 0x301;
if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol)))
return rc;
goto out;
/* Couldn't find anything in SATA I/II specs, but AHCI-1.1
* 10.4.2 says at least 1 ms.
@ -2839,7 +2837,40 @@ int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
msleep(1);
/* bring phy back */
sata_phy_resume(ap, timing);
rc = sata_phy_resume(ap, timing);
out:
DPRINTK("EXIT, rc=%d\n", rc);
return rc;
}
/**
* sata_std_hardreset - reset host port via SATA phy reset
* @ap: port to reset
* @class: resulting class of attached device
*
* SATA phy-reset host port using DET bits of SControl register,
* wait for !BSY and classify the attached device.
*
* LOCKING:
* Kernel thread context (may sleep)
*
* RETURNS:
* 0 on success, -errno otherwise.
*/
int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
{
const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context);
int rc;
DPRINTK("ENTER\n");
/* do hardreset */
rc = sata_port_hardreset(ap, timing);
if (rc) {
ata_port_printk(ap, KERN_ERR,
"COMRESET failed (errno=%d)\n", rc);
return rc;
}
/* TODO: phy layer with polling, timeouts, etc. */
if (ata_port_offline(ap)) {
@ -6159,6 +6190,7 @@ EXPORT_SYMBOL_GPL(__sata_phy_reset);
EXPORT_SYMBOL_GPL(ata_bus_reset);
EXPORT_SYMBOL_GPL(ata_std_prereset);
EXPORT_SYMBOL_GPL(ata_std_softreset);
EXPORT_SYMBOL_GPL(sata_port_hardreset);
EXPORT_SYMBOL_GPL(sata_std_hardreset);
EXPORT_SYMBOL_GPL(ata_std_postreset);
EXPORT_SYMBOL_GPL(ata_dev_classify);

2
include/linux/libata.h
View File

@ -702,6 +702,8 @@ extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
extern int ata_std_prereset(struct ata_port *ap);
extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
extern int sata_port_hardreset(struct ata_port *ap,
const unsigned long *timing);
extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
extern void ata_port_disable(struct ata_port *);