phy/st/phy-spear1340-miphy.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * ST spear1340-miphy driver
12 #include <linux/dma-mapping.h>
17 #include <linux/phy/phy.h>
33 /* PCIE - SATA configuration registers */
76 	SATA,  enumerator
81 	/* phy mode: 0 for SATA 1 for PCIe */
85 	/* phy struct pointer */
86 	struct phy			*phy;  member
91 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,  in spear1340_miphy_sata_init()
94 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,  in spear1340_miphy_sata_init()
97 	/* Switch on sata power domain */  in spear1340_miphy_sata_init()
98 	regmap_update_bits(priv->misc, SPEAR1340_PCM_CFG,  in spear1340_miphy_sata_init()
101 	/* Wait for SATA power domain on */  in spear1340_miphy_sata_init()
104 	/* Disable PCIE SATA Controller reset */  in spear1340_miphy_sata_init()
105 	regmap_update_bits(priv->misc, SPEAR1340_PERIP1_SW_RST,  in spear1340_miphy_sata_init()
107 	/* Wait for SATA reset de-assert completion */  in spear1340_miphy_sata_init()
115 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,  in spear1340_miphy_sata_exit()
117 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,  in spear1340_miphy_sata_exit()
120 	/* Enable PCIE SATA Controller reset */  in spear1340_miphy_sata_exit()
121 	regmap_update_bits(priv->misc, SPEAR1340_PERIP1_SW_RST,  in spear1340_miphy_sata_exit()
124 	/* Wait for SATA power domain off */  in spear1340_miphy_sata_exit()
126 	/* Switch off sata power domain */  in spear1340_miphy_sata_exit()
127 	regmap_update_bits(priv->misc, SPEAR1340_PCM_CFG,  in spear1340_miphy_sata_exit()
129 	/* Wait for SATA reset assert completion */  in spear1340_miphy_sata_exit()
137 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,  in spear1340_miphy_pcie_init()
140 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,  in spear1340_miphy_pcie_init()
149 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,  in spear1340_miphy_pcie_exit()
151 	regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,  in spear1340_miphy_pcie_exit()
157 static int spear1340_miphy_init(struct phy *phy)  in spear1340_miphy_init()  argument
159 	struct spear1340_miphy_priv *priv = phy_get_drvdata(phy);  in spear1340_miphy_init()
162 	if (priv->mode == SATA)  in spear1340_miphy_init()
164 	else if (priv->mode == PCIE)  in spear1340_miphy_init()
170 static int spear1340_miphy_exit(struct phy *phy)  in spear1340_miphy_exit()  argument
172 	struct spear1340_miphy_priv *priv = phy_get_drvdata(phy);  in spear1340_miphy_exit()
175 	if (priv->mode == SATA)  in spear1340_miphy_exit()
177 	else if (priv->mode == PCIE)  in spear1340_miphy_exit()
184 	{ .compatible = "st,spear1340-miphy" },
201 	if (priv->mode == SATA)  in spear1340_miphy_suspend()
212 	if (priv->mode == SATA)  in spear1340_miphy_resume()
222 static struct phy *spear1340_miphy_xlate(struct device *dev,  in spear1340_miphy_xlate()
227 	if (args->args_count < 1) {  in spear1340_miphy_xlate()
229 		return ERR_PTR(-ENODEV);  in spear1340_miphy_xlate()
232 	priv->mode = args->args[0];  in spear1340_miphy_xlate()
234 	if (priv->mode != SATA && priv->mode != PCIE) {  in spear1340_miphy_xlate()
235 		dev_err(dev, "DT did not pass correct phy mode\n");  in spear1340_miphy_xlate()
236 		return ERR_PTR(-ENODEV);  in spear1340_miphy_xlate()
239 	return priv->phy;  in spear1340_miphy_xlate()
244 	struct device *dev = &pdev->dev;  in spear1340_miphy_probe()
250 		return -ENOMEM;  in spear1340_miphy_probe()
252 	priv->misc =  in spear1340_miphy_probe()
253 		syscon_regmap_lookup_by_phandle(dev->of_node, "misc");  in spear1340_miphy_probe()
254 	if (IS_ERR(priv->misc)) {  in spear1340_miphy_probe()
256 		return PTR_ERR(priv->misc);  in spear1340_miphy_probe()
259 	priv->phy = devm_phy_create(dev, NULL, &spear1340_miphy_ops);  in spear1340_miphy_probe()
260 	if (IS_ERR(priv->phy)) {  in spear1340_miphy_probe()
261 		dev_err(dev, "failed to create SATA PCIe PHY\n");  in spear1340_miphy_probe()
262 		return PTR_ERR(priv->phy);  in spear1340_miphy_probe()
266 	phy_set_drvdata(priv->phy, priv);  in spear1340_miphy_probe()
271 		dev_err(dev, "failed to register phy provider\n");  in spear1340_miphy_probe()
281 		.name = "spear1340-miphy",
289 MODULE_DESCRIPTION("ST SPEAR1340-MIPHY driver");