1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * dwmac-sunxi.c - Allwinner sunxi DWMAC specific glue layer
5  * Copyright (C) 2013 Chen-Yu Tsai
7  * Chen-Yu Tsai  <wens@csie.org>
32 	struct sunxi_priv_data *gmac = priv;  in sun7i_gmac_init()  local
35 	if (gmac->regulator) {  in sun7i_gmac_init()
36 		ret = regulator_enable(gmac->regulator);  in sun7i_gmac_init()
41 	/* Set GMAC interface port mode  in sun7i_gmac_init()
43 	 * The GMAC TX clock lines are configured by setting the clock  in sun7i_gmac_init()
44 	 * rate, which then uses the auto-reparenting feature of the  in sun7i_gmac_init()
47 	if (phy_interface_mode_is_rgmii(gmac->interface)) {  in sun7i_gmac_init()
48 		clk_set_rate(gmac->tx_clk, SUN7I_GMAC_GMII_RGMII_RATE);  in sun7i_gmac_init()
49 		clk_prepare_enable(gmac->tx_clk);  in sun7i_gmac_init()
50 		gmac->clk_enabled = 1;  in sun7i_gmac_init()
52 		clk_set_rate(gmac->tx_clk, SUN7I_GMAC_MII_RATE);  in sun7i_gmac_init()
53 		ret = clk_prepare(gmac->tx_clk);  in sun7i_gmac_init()
54 		if (ret && gmac->regulator)  in sun7i_gmac_init()
55 			regulator_disable(gmac->regulator);  in sun7i_gmac_init()
63 	struct sunxi_priv_data *gmac = priv;  in sun7i_gmac_exit()  local
65 	if (gmac->clk_enabled) {  in sun7i_gmac_exit()
66 		clk_disable(gmac->tx_clk);  in sun7i_gmac_exit()
67 		gmac->clk_enabled = 0;  in sun7i_gmac_exit()
69 	clk_unprepare(gmac->tx_clk);  in sun7i_gmac_exit()
71 	if (gmac->regulator)  in sun7i_gmac_exit()
72 		regulator_disable(gmac->regulator);  in sun7i_gmac_exit()
77 	struct sunxi_priv_data *gmac = priv;  in sun7i_fix_speed()  local
80 	if (gmac->interface != PHY_INTERFACE_MODE_GMII)  in sun7i_fix_speed()
83 	if (gmac->clk_enabled) {  in sun7i_fix_speed()
84 		clk_disable(gmac->tx_clk);  in sun7i_fix_speed()
85 		gmac->clk_enabled = 0;  in sun7i_fix_speed()
87 	clk_unprepare(gmac->tx_clk);  in sun7i_fix_speed()
90 		clk_set_rate(gmac->tx_clk, SUN7I_GMAC_GMII_RGMII_RATE);  in sun7i_fix_speed()
91 		clk_prepare_enable(gmac->tx_clk);  in sun7i_fix_speed()
92 		gmac->clk_enabled = 1;  in sun7i_fix_speed()
94 		clk_set_rate(gmac->tx_clk, SUN7I_GMAC_MII_RATE);  in sun7i_fix_speed()
95 		clk_prepare(gmac->tx_clk);  in sun7i_fix_speed()
103 	struct sunxi_priv_data *gmac;  in sun7i_gmac_probe()  local
104 	struct device *dev = &pdev->dev;  in sun7i_gmac_probe()
115 	gmac = devm_kzalloc(dev, sizeof(*gmac), GFP_KERNEL);  in sun7i_gmac_probe()
116 	if (!gmac)  in sun7i_gmac_probe()
117 		return -ENOMEM;  in sun7i_gmac_probe()
119 	ret = of_get_phy_mode(dev->of_node, &gmac->interface);  in sun7i_gmac_probe()
120 	if (ret && ret != -ENODEV) {  in sun7i_gmac_probe()
121 		dev_err(dev, "Can't get phy-mode\n");  in sun7i_gmac_probe()
125 	gmac->tx_clk = devm_clk_get(dev, "allwinner_gmac_tx");  in sun7i_gmac_probe()
126 	if (IS_ERR(gmac->tx_clk)) {  in sun7i_gmac_probe()
128 		return PTR_ERR(gmac->tx_clk);  in sun7i_gmac_probe()
132 	gmac->regulator = devm_regulator_get_optional(dev, "phy");  in sun7i_gmac_probe()
133 	if (IS_ERR(gmac->regulator)) {  in sun7i_gmac_probe()
134 		if (PTR_ERR(gmac->regulator) == -EPROBE_DEFER)  in sun7i_gmac_probe()
135 			return -EPROBE_DEFER;  in sun7i_gmac_probe()
137 		gmac->regulator = NULL;  in sun7i_gmac_probe()
142 	plat_dat->tx_coe = 1;  in sun7i_gmac_probe()
143 	plat_dat->has_gmac = true;  in sun7i_gmac_probe()
144 	plat_dat->bsp_priv = gmac;  in sun7i_gmac_probe()
145 	plat_dat->init = sun7i_gmac_init;  in sun7i_gmac_probe()
146 	plat_dat->exit = sun7i_gmac_exit;  in sun7i_gmac_probe()
147 	plat_dat->fix_mac_speed = sun7i_fix_speed;  in sun7i_gmac_probe()
148 	plat_dat->tx_fifo_size = 4096;  in sun7i_gmac_probe()
149 	plat_dat->rx_fifo_size = 16384;  in sun7i_gmac_probe()
151 	ret = sun7i_gmac_init(pdev, plat_dat->bsp_priv);  in sun7i_gmac_probe()
155 	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);  in sun7i_gmac_probe()
162 	sun7i_gmac_exit(pdev, plat_dat->bsp_priv);  in sun7i_gmac_probe()
168 	{ .compatible = "allwinner,sun7i-a20-gmac" },
177 		.name           = "sun7i-dwmac",
184 MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>");