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Commit 29e69413 authored by Russell King's avatar Russell King Committed by Tejun Heo
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ata: ahci_imx: allow hardware parameters to be specified in DT 

Various SATA phy parameters are board specific, and therefore need to
be configured.
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: default avatarShawn Guo <shawn.guo@freescale.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 23a7c31e
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Showing with 160 additions and 8 deletions
drivers/ata/ahci_imx.c
View file @ 29e69413
......@@ -62,6 +62,7 @@ struct imx_ahci_priv {
struct regmap *gpr;
bool no_device;
bool first_time;
u32 phy_params;
};
static int ahci_imx_hotplug;
......@@ -246,14 +247,7 @@ 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);
......@@ -364,6 +358,152 @@ 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 },
{ 1110, IMX6Q_GPR13_SATA_TX_BOOST_1_11_DB },
{ 1480, IMX6Q_GPR13_SATA_TX_BOOST_1_48_DB },
{ 1850, IMX6Q_GPR13_SATA_TX_BOOST_1_85_DB },
{ 2220, IMX6Q_GPR13_SATA_TX_BOOST_2_22_DB },
{ 2590, IMX6Q_GPR13_SATA_TX_BOOST_2_59_DB },
{ 2960, IMX6Q_GPR13_SATA_TX_BOOST_2_96_DB },
{ 3330, IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB },
{ 3700, IMX6Q_GPR13_SATA_TX_BOOST_3_70_DB },
{ 4070, IMX6Q_GPR13_SATA_TX_BOOST_4_07_DB },
{ 4440, IMX6Q_GPR13_SATA_TX_BOOST_4_44_DB },
{ 4810, IMX6Q_GPR13_SATA_TX_BOOST_4_81_DB },
{ 5280, IMX6Q_GPR13_SATA_TX_BOOST_5_28_DB },
{ 5750, 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;
......@@ -392,6 +532,8 @@ 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)) {
......@@ -399,6 +541,16 @@ 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);
......
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