diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ata/sata_nv.c | 53 |
1 files changed, 25 insertions, 28 deletions
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c index fae3841de0d8..6f1460614325 100644 --- a/drivers/ata/sata_nv.c +++ b/drivers/ata/sata_nv.c @@ -307,10 +307,10 @@ static int nv_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); static void nv_nf2_freeze(struct ata_port *ap); static void nv_nf2_thaw(struct ata_port *ap); +static int nv_nf2_hardreset(struct ata_link *link, unsigned int *class, + unsigned long deadline); static void nv_ck804_freeze(struct ata_port *ap); static void nv_ck804_thaw(struct ata_port *ap); -static int nv_hardreset(struct ata_link *link, unsigned int *class, - unsigned long deadline); static int nv_adma_slave_config(struct scsi_device *sdev); static int nv_adma_check_atapi_dma(struct ata_queued_cmd *qc); static void nv_adma_qc_prep(struct ata_queued_cmd *qc); @@ -405,17 +405,8 @@ static struct scsi_host_template nv_swncq_sht = { .slave_configure = nv_swncq_slave_config, }; -/* OSDL bz3352 reports that some nv controllers can't determine device - * signature reliably and nv_hardreset is implemented to work around - * the problem. This was reported on nf3 and it's unclear whether any - * other controllers are affected. However, the workaround has been - * applied to all variants and there isn't much to gain by trying to - * find out exactly which ones are affected at this point especially - * because NV has moved over to ahci for newer controllers. - */ static struct ata_port_operations nv_common_ops = { .inherits = &ata_bmdma_port_ops, - .hardreset = nv_hardreset, .scr_read = nv_scr_read, .scr_write = nv_scr_write, }; @@ -429,12 +420,22 @@ static struct ata_port_operations nv_generic_ops = { .hardreset = ATA_OP_NULL, }; +/* OSDL bz3352 reports that nf2/3 controllers can't determine device + * signature reliably. Also, the following thread reports detection + * failure on cold boot with the standard debouncing timing. + * + * http://thread.gmane.org/gmane.linux.ide/34098 + * + * Debounce with hotplug timing and request follow-up SRST. + */ static struct ata_port_operations nv_nf2_ops = { .inherits = &nv_common_ops, .freeze = nv_nf2_freeze, .thaw = nv_nf2_thaw, + .hardreset = nv_nf2_hardreset, }; +/* CK804 finally gets hardreset right */ static struct ata_port_operations nv_ck804_ops = { .inherits = &nv_common_ops, .freeze = nv_ck804_freeze, @@ -443,7 +444,7 @@ static struct ata_port_operations nv_ck804_ops = { }; static struct ata_port_operations nv_adma_ops = { - .inherits = &nv_common_ops, + .inherits = &nv_ck804_ops, .check_atapi_dma = nv_adma_check_atapi_dma, .sff_tf_read = nv_adma_tf_read, @@ -467,7 +468,7 @@ static struct ata_port_operations nv_adma_ops = { }; static struct ata_port_operations nv_swncq_ops = { - .inherits = &nv_common_ops, + .inherits = &nv_generic_ops, .qc_defer = ata_std_qc_defer, .qc_prep = nv_swncq_qc_prep, @@ -1553,6 +1554,17 @@ static void nv_nf2_thaw(struct ata_port *ap) iowrite8(mask, scr_addr + NV_INT_ENABLE); } +static int nv_nf2_hardreset(struct ata_link *link, unsigned int *class, + unsigned long deadline) +{ + bool online; + int rc; + + rc = sata_link_hardreset(link, sata_deb_timing_hotplug, deadline, + &online, NULL); + return online ? -EAGAIN : rc; +} + static void nv_ck804_freeze(struct ata_port *ap) { void __iomem *mmio_base = ap->host->iomap[NV_MMIO_BAR]; @@ -1605,21 +1617,6 @@ static void nv_mcp55_thaw(struct ata_port *ap) ata_sff_thaw(ap); } -static int nv_hardreset(struct ata_link *link, unsigned int *class, - unsigned long deadline) -{ - int rc; - - /* SATA hardreset fails to retrieve proper device signature on - * some controllers. Request follow up SRST. For more info, - * see http://bugzilla.kernel.org/show_bug.cgi?id=3352 - */ - rc = sata_sff_hardreset(link, class, deadline); - if (rc) - return rc; - return -EAGAIN; -} - static void nv_adma_error_handler(struct ata_port *ap) { struct nv_adma_port_priv *pp = ap->private_data; |