1 // SPDX-License-Identifier: GPL-2.0
9 #include <linux/nvmem-consumer.h>
15 #include "phy-mtk-io.h"
36  * struct mtk_pcie_lane_efuse - eFuse data for each lane
40  * @lane_efuse_supported: software eFuse data is supported for this lane
50  * struct mtk_pcie_phy_data - phy data for each SoC
52  * @sw_efuse_supported: support software to load eFuse data
60  * struct mtk_pcie_phy - PCIe phy driver main structure
65  * @sw_efuse_en: software eFuse enable status
67  * @efuse: pointer to eFuse data for each lane
77 	struct mtk_pcie_lane_efuse *efuse;  member
83 	struct mtk_pcie_lane_efuse *data = &pcie_phy->efuse[lane];  in mtk_pcie_efuse_set_lane()
86 	if (!data->lane_efuse_supported)  in mtk_pcie_efuse_set_lane()
89 	addr = pcie_phy->sif_base + PEXTP_ANA_LN0_TRX_REG +  in mtk_pcie_efuse_set_lane()
93 			     data->tx_pmos);  in mtk_pcie_efuse_set_lane()
96 			     data->tx_nmos);  in mtk_pcie_efuse_set_lane()
99 			     data->rx_data);  in mtk_pcie_efuse_set_lane()
103  * mtk_pcie_phy_init() - Initialize the phy
106  * Initialize the phy by setting the efuse data.
115 	if (!pcie_phy->sw_efuse_en)  in mtk_pcie_phy_init()
119 	mtk_phy_update_field(pcie_phy->sif_base + PEXTP_ANA_GLB_00_REG,  in mtk_pcie_phy_init()
120 			     EFUSE_GLB_INTR_SEL, pcie_phy->efuse_glb_intr);  in mtk_pcie_phy_init()
122 	for (i = 0; i < pcie_phy->data->num_lanes; i++)  in mtk_pcie_phy_init()
136 	struct mtk_pcie_lane_efuse *efuse = &pcie_phy->efuse[lane];  in mtk_pcie_efuse_read_for_lane()  local
137 	struct device *dev = pcie_phy->dev;  in mtk_pcie_efuse_read_for_lane()
142 	ret = nvmem_cell_read_variable_le_u32(dev, efuse_id, &efuse->tx_pmos);  in mtk_pcie_efuse_read_for_lane()
147 	ret = nvmem_cell_read_variable_le_u32(dev, efuse_id, &efuse->tx_nmos);  in mtk_pcie_efuse_read_for_lane()
152 	ret = nvmem_cell_read_variable_le_u32(dev, efuse_id, &efuse->rx_data);  in mtk_pcie_efuse_read_for_lane()
156 	if (!(efuse->tx_pmos || efuse->tx_nmos || efuse->rx_data))  in mtk_pcie_efuse_read_for_lane()
157 		return dev_err_probe(dev, -EINVAL,  in mtk_pcie_efuse_read_for_lane()
158 				     "No eFuse data found for lane%d, but dts enable it\n",  in mtk_pcie_efuse_read_for_lane()
161 	efuse->lane_efuse_supported = true;  in mtk_pcie_efuse_read_for_lane()
168 	struct device *dev = pcie_phy->dev;  in mtk_pcie_read_efuse()
173 	nvmem_enabled = device_property_present(dev, "nvmem-cells");  in mtk_pcie_read_efuse()
178 					      &pcie_phy->efuse_glb_intr);  in mtk_pcie_read_efuse()
182 	pcie_phy->sw_efuse_en = true;  in mtk_pcie_read_efuse()
184 	pcie_phy->efuse = devm_kzalloc(dev, pcie_phy->data->num_lanes *  in mtk_pcie_read_efuse()
185 				       sizeof(*pcie_phy->efuse), GFP_KERNEL);  in mtk_pcie_read_efuse()
186 	if (!pcie_phy->efuse)  in mtk_pcie_read_efuse()
187 		return -ENOMEM;  in mtk_pcie_read_efuse()
189 	for (i = 0; i < pcie_phy->data->num_lanes; i++) {  in mtk_pcie_read_efuse()
200 	struct device *dev = &pdev->dev;  in mtk_pcie_phy_probe()
207 		return -ENOMEM;  in mtk_pcie_phy_probe()
209 	pcie_phy->sif_base = devm_platform_ioremap_resource_byname(pdev, "sif");  in mtk_pcie_phy_probe()
210 	if (IS_ERR(pcie_phy->sif_base))  in mtk_pcie_phy_probe()
211 		return dev_err_probe(dev, PTR_ERR(pcie_phy->sif_base),  in mtk_pcie_phy_probe()
212 				     "Failed to map phy-sif base\n");  in mtk_pcie_phy_probe()
214 	pcie_phy->phy = devm_phy_create(dev, dev->of_node, &mtk_pcie_phy_ops);  in mtk_pcie_phy_probe()
215 	if (IS_ERR(pcie_phy->phy))  in mtk_pcie_phy_probe()
216 		return dev_err_probe(dev, PTR_ERR(pcie_phy->phy),  in mtk_pcie_phy_probe()
219 	pcie_phy->dev = dev;  in mtk_pcie_phy_probe()
220 	pcie_phy->data = of_device_get_match_data(dev);  in mtk_pcie_phy_probe()
221 	if (!pcie_phy->data)  in mtk_pcie_phy_probe()
222 		return dev_err_probe(dev, -EINVAL, "Failed to get phy data\n");  in mtk_pcie_phy_probe()
224 	if (pcie_phy->data->sw_efuse_supported) {  in mtk_pcie_phy_probe()
226 		 * Failed to read the efuse data is not a fatal problem,  in mtk_pcie_phy_probe()
230 		if (ret == -EPROBE_DEFER || ret == -ENOMEM)  in mtk_pcie_phy_probe()
234 	phy_set_drvdata(pcie_phy->phy, pcie_phy);  in mtk_pcie_phy_probe()
250 	{ .compatible = "mediatek,mt8195-pcie-phy", .data = &mt8195_data },
258 		.name = "mtk-pcie-phy",