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[SCSI] isci: fix start OOB 

Split scu_link_layer_start_oob function to reset and enable and
add flush after all steps.

Signed-off-by: Marcin Tomczak <marcin.tomczak@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Marcin Tomczak 2012-01-04 01:33:36 -08:00 committed by James Bottomley
parent be77834181
commit 0953dbea1d
1 changed files with 17 additions and 16 deletions
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33
drivers/scsi/isci/phy.c
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@ -1098,24 +1098,25 @@ static void scu_link_layer_stop_protocol_engine(
writel(enable_spinup_value, &iphy->link_layer_registers->notify_enable_spinup_control);
}
/**
*
*
* This method will start the OOB/SN state machine for this struct isci_phy object.
*/
static void scu_link_layer_start_oob(
struct isci_phy *iphy)
static void scu_link_layer_start_oob(struct isci_phy *iphy)
{
u32 scu_sas_pcfg_value;
struct scu_link_layer_registers __iomem *ll = iphy->link_layer_registers;
u32 val;
scu_sas_pcfg_value =
readl(&iphy->link_layer_registers->phy_configuration);
scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE);
scu_sas_pcfg_value &=
~(SCU_SAS_PCFG_GEN_BIT(OOB_RESET) |
SCU_SAS_PCFG_GEN_BIT(HARD_RESET));
writel(scu_sas_pcfg_value,
&iphy->link_layer_registers->phy_configuration);
/** Reset OOB sequence - start */
val = readl(&ll->phy_configuration);
val &= ~(SCU_SAS_PCFG_GEN_BIT(OOB_RESET) |
SCU_SAS_PCFG_GEN_BIT(HARD_RESET));
writel(val, &ll->phy_configuration);
readl(&ll->phy_configuration); /* flush */
/** Reset OOB sequence - end */
/** Start OOB sequence - start */
val = readl(&ll->phy_configuration);
val |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE);
writel(val, &ll->phy_configuration);
readl(&ll->phy_configuration); /* flush */
/** Start OOB sequence - end */
}
/**