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authorFlorian Fainelli <f.fainelli@gmail.com>2018-01-11 17:31:07 -0800
committerTejun Heo <tj@kernel.org>2018-01-17 07:52:29 -0800
commit3e507769d15e4b14b5a3688d7f5cba516cb4e72d (patch)
treeba0cfe735a8ece2b502a3bbaaa95fb993db61a68 /drivers/phy
parentf919dde0772a894c693a1eeabc77df69d6a9b937 (diff)
phy: brcm-sata: Implement calibrate callback
Implement the calibration callback to allow turning on the Clock-Data Recovery module clamping when necessary, e.g: during failure to identify a SATA hard drive from ahci_brcm.c::brcm_ahci_read_id. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/phy')
-rw-r--r--drivers/phy/broadcom/phy-brcm-sata.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/phy/broadcom/phy-brcm-sata.c b/drivers/phy/broadcom/phy-brcm-sata.c
index 3f953db70288..8000ce312d95 100644
--- a/drivers/phy/broadcom/phy-brcm-sata.c
+++ b/drivers/phy/broadcom/phy-brcm-sata.c
@@ -150,6 +150,9 @@ enum sata_phy_regs {
TXPMD_TX_FREQ_CTRL_CONTROL2_FMIN_MASK = 0x3ff,
TXPMD_TX_FREQ_CTRL_CONTROL3 = 0x84,
TXPMD_TX_FREQ_CTRL_CONTROL3_FMAX_MASK = 0x3ff,
+
+ RXPMD_REG_BANK = 0x1c0,
+ RXPMD_RX_FREQ_MON_CONTROL1 = 0x87,
};
enum sata_phy_ctrl_regs {
@@ -505,8 +508,37 @@ static int brcm_sata_phy_init(struct phy *phy)
return rc;
}
+static void brcm_stb_sata_calibrate(struct brcm_sata_port *port)
+{
+ void __iomem *base = brcm_sata_pcb_base(port);
+ struct brcm_sata_phy *priv = port->phy_priv;
+ u32 tmp = BIT(8);
+
+ brcm_sata_phy_wr(base, RXPMD_REG_BANK, RXPMD_RX_FREQ_MON_CONTROL1,
+ ~tmp, tmp);
+}
+
+static int brcm_sata_phy_calibrate(struct phy *phy)
+{
+ struct brcm_sata_port *port = phy_get_drvdata(phy);
+ int rc = -EOPNOTSUPP;
+
+ switch (port->phy_priv->version) {
+ case BRCM_SATA_PHY_STB_28NM:
+ case BRCM_SATA_PHY_STB_40NM:
+ brcm_stb_sata_calibrate(port);
+ rc = 0;
+ break;
+ default:
+ break;
+ };
+
+ return rc;
+}
+
static const struct phy_ops phy_ops = {
.init = brcm_sata_phy_init,
+ .calibrate = brcm_sata_phy_calibrate,
.owner = THIS_MODULE,
};

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