[PATCH 140/222] ata: ahci_imx: allow hardware parameters to be specified in DT
Russell King
rmk+kernel at arm.linux.org.uk
Fri Apr 25 04:43:22 PDT 2014
Various SATA phy parameters are board specific, and therefore need to
be configured.
Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
---
drivers/ata/ahci_imx.c | 168 ++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 160 insertions(+), 8 deletions(-)
diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
index 6a56a561a80b..fa5755f8dff2 100644
--- a/drivers/ata/ahci_imx.c
+++ b/drivers/ata/ahci_imx.c
@@ -46,6 +46,7 @@ struct imx_ahci_priv {
struct regmap *gpr;
bool no_device;
bool first_time;
+ u32 phy_params;
};
static int ahci_imx_hotplug;
@@ -90,14 +91,7 @@ static int imx_sata_enable(struct ahci_host_priv *hpriv)
IMX6Q_GPR13_SATA_TX_LVL_MASK |
IMX6Q_GPR13_SATA_MPLL_CLK_EN |
IMX6Q_GPR13_SATA_TX_EDGE_RATE,
- IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB |
- IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M |
- IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F |
- IMX6Q_GPR13_SATA_SPD_MODE_3P0G |
- IMX6Q_GPR13_SATA_MPLL_SS_EN |
- IMX6Q_GPR13_SATA_TX_ATTEN_9_16 |
- IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB |
- IMX6Q_GPR13_SATA_TX_LVL_1_025_V);
+ imxpriv->phy_params);
regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
IMX6Q_GPR13_SATA_MPLL_CLK_EN,
IMX6Q_GPR13_SATA_MPLL_CLK_EN);
@@ -204,6 +198,152 @@ static const struct of_device_id imx_ahci_of_match[] = {
};
MODULE_DEVICE_TABLE(of, imx_ahci_of_match);
+struct reg_value {
+ u32 of_value;
+ u32 reg_value;
+};
+
+struct reg_property {
+ const char *name;
+ const struct reg_value *values;
+ size_t num_values;
+ u32 def_value;
+};
+
+static const struct reg_value gpr13_tx_level[] = {
+ { 937, IMX6Q_GPR13_SATA_TX_LVL_0_937_V },
+ { 947, IMX6Q_GPR13_SATA_TX_LVL_0_947_V },
+ { 957, IMX6Q_GPR13_SATA_TX_LVL_0_957_V },
+ { 966, IMX6Q_GPR13_SATA_TX_LVL_0_966_V },
+ { 976, IMX6Q_GPR13_SATA_TX_LVL_0_976_V },
+ { 986, IMX6Q_GPR13_SATA_TX_LVL_0_986_V },
+ { 996, IMX6Q_GPR13_SATA_TX_LVL_0_996_V },
+ { 1005, IMX6Q_GPR13_SATA_TX_LVL_1_005_V },
+ { 1015, IMX6Q_GPR13_SATA_TX_LVL_1_015_V },
+ { 1025, IMX6Q_GPR13_SATA_TX_LVL_1_025_V },
+ { 1035, IMX6Q_GPR13_SATA_TX_LVL_1_035_V },
+ { 1045, IMX6Q_GPR13_SATA_TX_LVL_1_045_V },
+ { 1054, IMX6Q_GPR13_SATA_TX_LVL_1_054_V },
+ { 1064, IMX6Q_GPR13_SATA_TX_LVL_1_064_V },
+ { 1074, IMX6Q_GPR13_SATA_TX_LVL_1_074_V },
+ { 1084, IMX6Q_GPR13_SATA_TX_LVL_1_084_V },
+ { 1094, IMX6Q_GPR13_SATA_TX_LVL_1_094_V },
+ { 1104, IMX6Q_GPR13_SATA_TX_LVL_1_104_V },
+ { 1113, IMX6Q_GPR13_SATA_TX_LVL_1_113_V },
+ { 1123, IMX6Q_GPR13_SATA_TX_LVL_1_123_V },
+ { 1133, IMX6Q_GPR13_SATA_TX_LVL_1_133_V },
+ { 1143, IMX6Q_GPR13_SATA_TX_LVL_1_143_V },
+ { 1152, IMX6Q_GPR13_SATA_TX_LVL_1_152_V },
+ { 1162, IMX6Q_GPR13_SATA_TX_LVL_1_162_V },
+ { 1172, IMX6Q_GPR13_SATA_TX_LVL_1_172_V },
+ { 1182, IMX6Q_GPR13_SATA_TX_LVL_1_182_V },
+ { 1191, IMX6Q_GPR13_SATA_TX_LVL_1_191_V },
+ { 1201, IMX6Q_GPR13_SATA_TX_LVL_1_201_V },
+ { 1211, IMX6Q_GPR13_SATA_TX_LVL_1_211_V },
+ { 1221, IMX6Q_GPR13_SATA_TX_LVL_1_221_V },
+ { 1230, IMX6Q_GPR13_SATA_TX_LVL_1_230_V },
+ { 1240, IMX6Q_GPR13_SATA_TX_LVL_1_240_V }
+};
+
+static const struct reg_value gpr13_tx_boost[] = {
+ { 0, IMX6Q_GPR13_SATA_TX_BOOST_0_00_DB },
+ { 370, IMX6Q_GPR13_SATA_TX_BOOST_0_37_DB },
+ { 740, IMX6Q_GPR13_SATA_TX_BOOST_0_74_DB },
+ { 111, IMX6Q_GPR13_SATA_TX_BOOST_1_11_DB },
+ { 148, IMX6Q_GPR13_SATA_TX_BOOST_1_48_DB },
+ { 185, IMX6Q_GPR13_SATA_TX_BOOST_1_85_DB },
+ { 222, IMX6Q_GPR13_SATA_TX_BOOST_2_22_DB },
+ { 259, IMX6Q_GPR13_SATA_TX_BOOST_2_59_DB },
+ { 296, IMX6Q_GPR13_SATA_TX_BOOST_2_96_DB },
+ { 333, IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB },
+ { 370, IMX6Q_GPR13_SATA_TX_BOOST_3_70_DB },
+ { 407, IMX6Q_GPR13_SATA_TX_BOOST_4_07_DB },
+ { 444, IMX6Q_GPR13_SATA_TX_BOOST_4_44_DB },
+ { 481, IMX6Q_GPR13_SATA_TX_BOOST_4_81_DB },
+ { 528, IMX6Q_GPR13_SATA_TX_BOOST_5_28_DB },
+ { 575, IMX6Q_GPR13_SATA_TX_BOOST_5_75_DB }
+};
+
+static const struct reg_value gpr13_tx_atten[] = {
+ { 8, IMX6Q_GPR13_SATA_TX_ATTEN_8_16 },
+ { 9, IMX6Q_GPR13_SATA_TX_ATTEN_9_16 },
+ { 10, IMX6Q_GPR13_SATA_TX_ATTEN_10_16 },
+ { 12, IMX6Q_GPR13_SATA_TX_ATTEN_12_16 },
+ { 14, IMX6Q_GPR13_SATA_TX_ATTEN_14_16 },
+ { 16, IMX6Q_GPR13_SATA_TX_ATTEN_16_16 },
+};
+
+static const struct reg_value gpr13_rx_eq[] = {
+ { 500, IMX6Q_GPR13_SATA_RX_EQ_VAL_0_5_DB },
+ { 1000, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_0_DB },
+ { 1500, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_5_DB },
+ { 2000, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_0_DB },
+ { 2500, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_5_DB },
+ { 3000, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB },
+ { 3500, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_5_DB },
+ { 4000, IMX6Q_GPR13_SATA_RX_EQ_VAL_4_0_DB },
+};
+
+static const struct reg_property gpr13_props[] = {
+ {
+ .name = "fsl,transmit-level-mV",
+ .values = gpr13_tx_level,
+ .num_values = ARRAY_SIZE(gpr13_tx_level),
+ .def_value = IMX6Q_GPR13_SATA_TX_LVL_1_025_V,
+ }, {
+ .name = "fsl,transmit-boost-mdB",
+ .values = gpr13_tx_boost,
+ .num_values = ARRAY_SIZE(gpr13_tx_boost),
+ .def_value = IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB,
+ }, {
+ .name = "fsl,transmit-atten-16ths",
+ .values = gpr13_tx_atten,
+ .num_values = ARRAY_SIZE(gpr13_tx_atten),
+ .def_value = IMX6Q_GPR13_SATA_TX_ATTEN_9_16,
+ }, {
+ .name = "fsl,receive-eq-mdB",
+ .values = gpr13_rx_eq,
+ .num_values = ARRAY_SIZE(gpr13_rx_eq),
+ .def_value = IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB,
+ },
+};
+
+static u32 imx_ahci_parse_props(struct device *dev,
+ const struct reg_property *prop, size_t num)
+{
+ struct device_node *np = dev->of_node;
+ u32 reg_value = 0;
+ int i, j;
+
+ for (i = 0; i < num; i++, prop++) {
+ u32 of_val;
+
+ if (of_property_read_u32(np, prop->name, &of_val)) {
+ dev_info(dev, "%s not specified, using %08x\n",
+ prop->name, prop->def_value);
+ reg_value |= prop->def_value;
+ continue;
+ }
+
+ for (j = 0; j < prop->num_values; j++) {
+ if (prop->values[j].of_value == of_val) {
+ dev_info(dev, "%s value %u, using %08x\n",
+ prop->name, of_val, prop->values[j].reg_value);
+ reg_value |= prop->values[j].reg_value;
+ break;
+ }
+ }
+
+ if (j == prop->num_values) {
+ dev_err(dev, "DT property %s is not a valid value\n",
+ prop->name);
+ reg_value |= prop->def_value;
+ }
+ }
+
+ return reg_value;
+}
+
static int imx_ahci_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -231,6 +371,8 @@ static int imx_ahci_probe(struct platform_device *pdev)
}
if (imxpriv->type == AHCI_IMX6Q) {
+ u32 reg_value;
+
imxpriv->gpr = syscon_regmap_lookup_by_compatible(
"fsl,imx6q-iomuxc-gpr");
if (IS_ERR(imxpriv->gpr)) {
@@ -238,6 +380,16 @@ static int imx_ahci_probe(struct platform_device *pdev)
"failed to find fsl,imx6q-iomux-gpr regmap\n");
return PTR_ERR(imxpriv->gpr);
}
+
+ reg_value = imx_ahci_parse_props(dev, gpr13_props,
+ ARRAY_SIZE(gpr13_props));
+
+ imxpriv->phy_params =
+ IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M |
+ IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F |
+ IMX6Q_GPR13_SATA_SPD_MODE_3P0G |
+ IMX6Q_GPR13_SATA_MPLL_SS_EN |
+ reg_value;
}
hpriv = ahci_platform_get_resources(pdev);
--
1.8.3.1
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