1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Loongson-1 DWMAC glue layer
5  * Copyright (C) 2011-2023 Keguang Zhang <keguang.zhang@gmail.com>
21 /* Loongson-1 SYSCON Registers */
25 /* Loongson-1B SYSCON Register Bits */
26 #define GMAC1_USE_UART1		BIT(4)
37 /* Loongson-1C SYSCON Register Bits */
42 #define PHY_INTF_RMII		FIELD_PREP(PHY_INTF_SELI, 4)
59 	struct ls1x_dwmac *dwmac = plat_dat->bsp_priv;  in ls1b_dwmac_setup()  local
64 		/* This shouldn't fail - stmmac_get_platform_resources()  in ls1b_dwmac_setup()
67 		dev_err(&pdev->dev, "Could not get IO_MEM resources\n");  in ls1b_dwmac_setup()
68 		return -EINVAL;  in ls1b_dwmac_setup()
71 	if (res->start == LS1B_GMAC0_BASE) {  in ls1b_dwmac_setup()
72 		dwmac->id = 0;  in ls1b_dwmac_setup()
73 	} else if (res->start == LS1B_GMAC1_BASE) {  in ls1b_dwmac_setup()
74 		dwmac->id = 1;  in ls1b_dwmac_setup()
76 		dev_err(&pdev->dev, "Invalid Ethernet MAC base address %pR",  in ls1b_dwmac_setup()
78 		return -EINVAL;  in ls1b_dwmac_setup()
86 	struct ls1x_dwmac *dwmac = priv;  in ls1b_dwmac_syscon_init()  local
87 	struct plat_stmmacenet_data *plat = dwmac->plat_dat;  in ls1b_dwmac_syscon_init()
88 	struct regmap *regmap = dwmac->regmap;  in ls1b_dwmac_syscon_init()
90 	if (dwmac->id == 0) {  in ls1b_dwmac_syscon_init()
91 		switch (plat->phy_interface) {  in ls1b_dwmac_syscon_init()
103 			dev_err(&pdev->dev, "Unsupported PHY mode %u\n",  in ls1b_dwmac_syscon_init()
104 				plat->phy_interface);  in ls1b_dwmac_syscon_init()
105 			return -EOPNOTSUPP;  in ls1b_dwmac_syscon_init()
109 	} else if (dwmac->id == 1) {  in ls1b_dwmac_syscon_init()
114 		switch (plat->phy_interface) {  in ls1b_dwmac_syscon_init()
127 			dev_err(&pdev->dev, "Unsupported PHY mode %u\n",  in ls1b_dwmac_syscon_init()
128 				plat->phy_interface);  in ls1b_dwmac_syscon_init()
129 			return -EOPNOTSUPP;  in ls1b_dwmac_syscon_init()
140 	struct ls1x_dwmac *dwmac = priv;  in ls1c_dwmac_syscon_init()  local
141 	struct plat_stmmacenet_data *plat = dwmac->plat_dat;  in ls1c_dwmac_syscon_init()
142 	struct regmap *regmap = dwmac->regmap;  in ls1c_dwmac_syscon_init()
144 	switch (plat->phy_interface) {  in ls1c_dwmac_syscon_init()
154 		dev_err(&pdev->dev, "Unsupported PHY-mode %u\n",  in ls1c_dwmac_syscon_init()
155 			plat->phy_interface);  in ls1c_dwmac_syscon_init()
156 		return -EOPNOTSUPP;  in ls1c_dwmac_syscon_init()
170 	struct ls1x_dwmac *dwmac;  in ls1x_dwmac_probe()  local
178 	regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,  in ls1x_dwmac_probe()
179 						 "loongson,ls1-syscon");  in ls1x_dwmac_probe()
181 		return dev_err_probe(&pdev->dev, PTR_ERR(regmap),  in ls1x_dwmac_probe()
184 	data = of_device_get_match_data(&pdev->dev);  in ls1x_dwmac_probe()
186 		dev_err(&pdev->dev, "No of match data provided\n");  in ls1x_dwmac_probe()
187 		return -EINVAL;  in ls1x_dwmac_probe()
190 	dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);  in ls1x_dwmac_probe()
191 	if (!dwmac)  in ls1x_dwmac_probe()
192 		return -ENOMEM;  in ls1x_dwmac_probe()
196 		return dev_err_probe(&pdev->dev, PTR_ERR(plat_dat),  in ls1x_dwmac_probe()
199 	plat_dat->bsp_priv = dwmac;  in ls1x_dwmac_probe()
200 	plat_dat->init = data->init;  in ls1x_dwmac_probe()
201 	dwmac->plat_dat = plat_dat;  in ls1x_dwmac_probe()
202 	dwmac->regmap = regmap;  in ls1x_dwmac_probe()
204 	if (data->setup) {  in ls1x_dwmac_probe()
205 		ret = data->setup(pdev, plat_dat);  in ls1x_dwmac_probe()
224 		.compatible = "loongson,ls1b-gmac",
228 		.compatible = "loongson,ls1c-emac",
238 		.name = "loongson1-dwmac",
245 MODULE_DESCRIPTION("Loongson-1 DWMAC glue layer");