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| author | Dan Williams <dan.j.williams@intel.com> | 2005-12-14 20:10:49 (GMT) |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2006-02-17 21:27:19 (GMT) |
| commit | 2ae5b30ff08cee422c7f6388a759f743633c7542 (patch) | |
| tree | 893a9ce0da84547400b63e9a53403a123709edd6 /drivers/scsi/sata_vsc.c | |
| parent | cfe91f9ce297e23e6fbdf61c02bdd8ab9af7c8a8 (diff) | |
| download | linux-2ae5b30ff08cee422c7f6388a759f743633c7542.tar.xz | |
[PATCH] Necessary evil to get sata_vsc to initialize with Intel iq3124h hba
* libata does not care about error interrupts, so handle them locally
* the interrupts that are ignored only appear to happen at init time
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/scsi/sata_vsc.c')
| -rw-r--r-- | drivers/scsi/sata_vsc.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/drivers/scsi/sata_vsc.c b/drivers/scsi/sata_vsc.c index 2e2c3b7..e484e8d 100644 --- a/drivers/scsi/sata_vsc.c +++ b/drivers/scsi/sata_vsc.c @@ -81,6 +81,19 @@ /* Port stride */ #define VSC_SATA_PORT_OFFSET 0x200 +/* Error interrupt status bit offsets */ +#define VSC_SATA_INT_ERROR_E_OFFSET 2 +#define VSC_SATA_INT_ERROR_P_OFFSET 4 +#define VSC_SATA_INT_ERROR_T_OFFSET 5 +#define VSC_SATA_INT_ERROR_M_OFFSET 1 +#define is_vsc_sata_int_err(port_idx, int_status) \ + (int_status & ((1 << (VSC_SATA_INT_ERROR_E_OFFSET + (8 * port_idx))) | \ + (1 << (VSC_SATA_INT_ERROR_P_OFFSET + (8 * port_idx))) | \ + (1 << (VSC_SATA_INT_ERROR_T_OFFSET + (8 * port_idx))) | \ + (1 << (VSC_SATA_INT_ERROR_M_OFFSET + (8 * port_idx))) \ + )\ + ) + static u32 vsc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg) { @@ -201,13 +214,28 @@ static irqreturn_t vsc_sata_interrupt (int irq, void *dev_instance, struct ata_port *ap; ap = host_set->ports[i]; + + if (is_vsc_sata_int_err(i, int_status)) { + u32 err_status; + printk(KERN_DEBUG "%s: ignoring interrupt(s)\n", __FUNCTION__); + err_status = ap ? vsc_sata_scr_read(ap, SCR_ERROR) : 0; + vsc_sata_scr_write(ap, SCR_ERROR, err_status); + handled++; + } + if (ap && !(ap->flags & (ATA_FLAG_PORT_DISABLED|ATA_FLAG_NOINTR))) { struct ata_queued_cmd *qc; qc = ata_qc_from_tag(ap, ap->active_tag); - if (qc && (!(qc->tf.ctl & ATA_NIEN))) + if (qc && (!(qc->tf.ctl & ATA_NIEN))) { handled += ata_host_intr(ap, qc); + } else { + printk(KERN_DEBUG "%s: ignoring interrupt(s)\n", __FUNCTION__); + ata_chk_status(ap); + handled++; + } + } } } |