*
* Copyright (C) 2019 Remi Pommarel <repk@triplefau.lt>
*/
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
#include <linux/module.h>
#include <linux/phy/phy.h>
#include <linux/regmap.h>
+#include <linux/delay.h>
+#include <linux/mfd/syscon.h>
#include <linux/platform_device.h>
#include <dt-bindings/phy/phy.h>
#define HHI_MIPI_CNTL0_COMMON_BLOCK GENMASK(31, 28)
#define HHI_MIPI_CNTL0_ENABLE BIT(29)
#define HHI_MIPI_CNTL0_BANDGAP BIT(26)
-#define HHI_MIPI_CNTL0_DECODE_TO_RTERM GENMASK(15, 12)
-#define HHI_MIPI_CNTL0_OUTPUT_EN BIT(3)
+#define HHI_MIPI_CNTL0_DIF_REF_CTL1 GENMASK(25, 16)
+#define HHI_MIPI_CNTL0_DIF_REF_CTL0 GENMASK(15, 0)
-#define HHI_MIPI_CNTL1 0x01
+#define HHI_MIPI_CNTL1 0x04
#define HHI_MIPI_CNTL1_CH0_CML_PDR_EN BIT(12)
#define HHI_MIPI_CNTL1_LP_ABILITY GENMASK(5, 4)
#define HHI_MIPI_CNTL1_LP_RESISTER BIT(3)
#define HHI_MIPI_CNTL1_INPUT_SEL BIT(1)
#define HHI_MIPI_CNTL1_PRBS7_EN BIT(0)
-#define HHI_MIPI_CNTL2 0x02
+#define HHI_MIPI_CNTL2 0x08
#define HHI_MIPI_CNTL2_CH_PU GENMASK(31, 25)
#define HHI_MIPI_CNTL2_CH_CTL GENMASK(24, 19)
#define HHI_MIPI_CNTL2_CH0_DIGDR_EN BIT(18)
#define HHI_MIPI_CNTL2_CH_DIGDR_EN BIT(17)
#define HHI_MIPI_CNTL2_LPULPS_EN BIT(16)
-#define HHI_MIPI_CNTL2_CH_EN(n) BIT(15 - (n))
+#define HHI_MIPI_CNTL2_CH_EN GENMASK(15, 11)
#define HHI_MIPI_CNTL2_CH0_LP_CTL GENMASK(10, 1)
+#define DSI_LANE_0 (1 << 4)
+#define DSI_LANE_1 (1 << 3)
+#define DSI_LANE_CLK (1 << 2)
+#define DSI_LANE_2 (1 << 1)
+#define DSI_LANE_3 (1 << 0)
+#define DSI_LANE_MASK (0x1F)
+
struct phy_axg_mipi_pcie_analog_priv {
struct phy *phy;
- unsigned int mode;
struct regmap *regmap;
+ bool dsi_configured;
+ bool dsi_enabled;
+ bool powered;
+ struct phy_configure_opts_mipi_dphy config;
};
-static const struct regmap_config phy_axg_mipi_pcie_analog_regmap_conf = {
- .reg_bits = 8,
- .val_bits = 32,
- .reg_stride = 4,
- .max_register = HHI_MIPI_CNTL2,
-};
+static void phy_bandgap_enable(struct phy_axg_mipi_pcie_analog_priv *priv)
+{
+ regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+ HHI_MIPI_CNTL0_BANDGAP, HHI_MIPI_CNTL0_BANDGAP);
-static int phy_axg_mipi_pcie_analog_power_on(struct phy *phy)
+ regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+ HHI_MIPI_CNTL0_ENABLE, HHI_MIPI_CNTL0_ENABLE);
+}
+
+static void phy_bandgap_disable(struct phy_axg_mipi_pcie_analog_priv *priv)
{
- struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);
+ regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+ HHI_MIPI_CNTL0_BANDGAP, 0);
+ regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+ HHI_MIPI_CNTL0_ENABLE, 0);
+}
- /* MIPI not supported yet */
- if (priv->mode != PHY_TYPE_PCIE)
- return -EINVAL;
+static void phy_dsi_analog_enable(struct phy_axg_mipi_pcie_analog_priv *priv)
+{
+ u32 reg;
regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
- HHI_MIPI_CNTL0_BANDGAP, HHI_MIPI_CNTL0_BANDGAP);
+ HHI_MIPI_CNTL0_DIF_REF_CTL1,
+ FIELD_PREP(HHI_MIPI_CNTL0_DIF_REF_CTL1, 0x1b8));
+ regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+ BIT(31), BIT(31));
+ regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+ HHI_MIPI_CNTL0_DIF_REF_CTL0,
+ FIELD_PREP(HHI_MIPI_CNTL0_DIF_REF_CTL0, 0x8));
+
+ regmap_write(priv->regmap, HHI_MIPI_CNTL1, 0x001e);
+
+ regmap_write(priv->regmap, HHI_MIPI_CNTL2,
+ (0x26e0 << 16) | (0x459 << 0));
+
+ reg = DSI_LANE_CLK;
+ switch (priv->config.lanes) {
+ case 4:
+ reg |= DSI_LANE_3;
+ fallthrough;
+ case 3:
+ reg |= DSI_LANE_2;
+ fallthrough;
+ case 2:
+ reg |= DSI_LANE_1;
+ fallthrough;
+ case 1:
+ reg |= DSI_LANE_0;
+ break;
+ default:
+ reg = 0;
+ }
+
+ regmap_update_bits(priv->regmap, HHI_MIPI_CNTL2,
+ HHI_MIPI_CNTL2_CH_EN,
+ FIELD_PREP(HHI_MIPI_CNTL2_CH_EN, reg));
+
+ priv->dsi_enabled = true;
+}
+static void phy_dsi_analog_disable(struct phy_axg_mipi_pcie_analog_priv *priv)
+{
regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
- HHI_MIPI_CNTL0_ENABLE, HHI_MIPI_CNTL0_ENABLE);
- return 0;
+ HHI_MIPI_CNTL0_DIF_REF_CTL1,
+ FIELD_PREP(HHI_MIPI_CNTL0_DIF_REF_CTL1, 0));
+ regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, BIT(31), 0);
+ regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+ HHI_MIPI_CNTL0_DIF_REF_CTL1, 0);
+
+ regmap_write(priv->regmap, HHI_MIPI_CNTL1, 0x6);
+
+ regmap_write(priv->regmap, HHI_MIPI_CNTL2, 0x00200000);
+
+ priv->dsi_enabled = false;
}
-static int phy_axg_mipi_pcie_analog_power_off(struct phy *phy)
+static int phy_axg_mipi_pcie_analog_configure(struct phy *phy,
+ union phy_configure_opts *opts)
{
struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);
+ int ret;
- /* MIPI not supported yet */
- if (priv->mode != PHY_TYPE_PCIE)
- return -EINVAL;
+ ret = phy_mipi_dphy_config_validate(&opts->mipi_dphy);
+ if (ret)
+ return ret;
+
+ memcpy(&priv->config, opts, sizeof(priv->config));
+
+ priv->dsi_configured = true;
+
+ /* If PHY was already powered on, setup the DSI analog part */
+ if (priv->powered) {
+ /* If reconfiguring, disable & reconfigure */
+ if (priv->dsi_enabled)
+ phy_dsi_analog_disable(priv);
+
+ usleep_range(100, 200);
+
+ phy_dsi_analog_enable(priv);
+ }
- regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
- HHI_MIPI_CNTL0_BANDGAP, 0);
- regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
- HHI_MIPI_CNTL0_ENABLE, 0);
return 0;
}
-static int phy_axg_mipi_pcie_analog_init(struct phy *phy)
+static int phy_axg_mipi_pcie_analog_power_on(struct phy *phy)
{
+ struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);
+
+ phy_bandgap_enable(priv);
+
+ if (priv->dsi_configured)
+ phy_dsi_analog_enable(priv);
+
+ priv->powered = true;
+
return 0;
}
-static int phy_axg_mipi_pcie_analog_exit(struct phy *phy)
+static int phy_axg_mipi_pcie_analog_power_off(struct phy *phy)
{
+ struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);
+
+ phy_bandgap_disable(priv);
+
+ if (priv->dsi_enabled)
+ phy_dsi_analog_disable(priv);
+
+ priv->powered = false;
+
return 0;
}
static const struct phy_ops phy_axg_mipi_pcie_analog_ops = {
- .init = phy_axg_mipi_pcie_analog_init,
- .exit = phy_axg_mipi_pcie_analog_exit,
+ .configure = phy_axg_mipi_pcie_analog_configure,
.power_on = phy_axg_mipi_pcie_analog_power_on,
.power_off = phy_axg_mipi_pcie_analog_power_off,
.owner = THIS_MODULE,
};
-static struct phy *phy_axg_mipi_pcie_analog_xlate(struct device *dev,
- struct of_phandle_args *args)
-{
- struct phy_axg_mipi_pcie_analog_priv *priv = dev_get_drvdata(dev);
- unsigned int mode;
-
- if (args->args_count != 1) {
- dev_err(dev, "invalid number of arguments\n");
- return ERR_PTR(-EINVAL);
- }
-
- mode = args->args[0];
-
- /* MIPI mode is not supported yet */
- if (mode != PHY_TYPE_PCIE) {
- dev_err(dev, "invalid phy mode select argument\n");
- return ERR_PTR(-EINVAL);
- }
-
- priv->mode = mode;
- return priv->phy;
-}
-
static int phy_axg_mipi_pcie_analog_probe(struct platform_device *pdev)
{
struct phy_provider *phy;
struct phy_axg_mipi_pcie_analog_priv *priv;
struct device_node *np = dev->of_node;
struct regmap *map;
- struct resource *res;
- void __iomem *base;
int ret;
priv = devm_kmalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- base = devm_ioremap_resource(dev, res);
- if (IS_ERR(base)) {
- dev_err(dev, "failed to get regmap base\n");
- return PTR_ERR(base);
- }
-
- map = devm_regmap_init_mmio(dev, base,
- &phy_axg_mipi_pcie_analog_regmap_conf);
+ /* Get the hhi system controller node */
+ map = syscon_node_to_regmap(of_get_parent(dev->of_node));
if (IS_ERR(map)) {
- dev_err(dev, "failed to get HHI regmap\n");
+ dev_err(dev,
+ "failed to get HHI regmap\n");
return PTR_ERR(map);
}
+
priv->regmap = map;
priv->phy = devm_phy_create(dev, np, &phy_axg_mipi_pcie_analog_ops);
phy_set_drvdata(priv->phy, priv);
dev_set_drvdata(dev, priv);
- phy = devm_of_phy_provider_register(dev,
- phy_axg_mipi_pcie_analog_xlate);
+ phy = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
return PTR_ERR_OR_ZERO(phy);
}
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