1 // SPDX-License-Identifier: GPL-2.0
3  * T-HEAD DWMAC platform driver
23 #define  GMAC_RX_CLK_EN			BIT(4)
29 #define  GMAC_RXCLK_DELAY		GENMASK(4, 0)
33 #define  GMAC_TXCLK_DELAY		GENMASK(4, 0)
59 	struct thead_dwmac *dwmac = plat->bsp_priv;  in thead_dwmac_set_phy_if()  local
62 	switch (plat->mac_interface) {  in thead_dwmac_set_phy_if()
73 		dev_err(dwmac->dev, "unsupported phy interface %d\n",  in thead_dwmac_set_phy_if()
74 			plat->mac_interface);  in thead_dwmac_set_phy_if()
75 		return -EINVAL;  in thead_dwmac_set_phy_if()
78 	writel(phyif, dwmac->apb_base + GMAC_INTF_CTRL);  in thead_dwmac_set_phy_if()
84 	struct thead_dwmac *dwmac = plat->bsp_priv;  in thead_dwmac_set_txclk_dir()  local
87 	switch (plat->mac_interface) {  in thead_dwmac_set_txclk_dir()
98 		dev_err(dwmac->dev, "unsupported phy interface %d\n",  in thead_dwmac_set_txclk_dir()
99 			plat->mac_interface);  in thead_dwmac_set_txclk_dir()
100 		return -EINVAL;  in thead_dwmac_set_txclk_dir()
103 	writel(txclk_dir, dwmac->apb_base + GMAC_TXCLK_OEN);  in thead_dwmac_set_txclk_dir()
110 	struct thead_dwmac *dwmac = priv;  in thead_dwmac_fix_speed()  local
114 	plat = dwmac->plat;  in thead_dwmac_fix_speed()
116 	switch (plat->mac_interface) {  in thead_dwmac_fix_speed()
125 		rate = clk_get_rate(plat->stmmac_clk);  in thead_dwmac_fix_speed()
128 			dev_err(dwmac->dev, "invalid gmac rate %ld\n", rate);  in thead_dwmac_fix_speed()
132 		writel(0, dwmac->apb_base + GMAC_PLLCLK_DIV);  in thead_dwmac_fix_speed()
145 			dev_err(dwmac->dev, "invalid speed %u\n", speed);  in thead_dwmac_fix_speed()
151 		writel(reg, dwmac->apb_base + GMAC_PLLCLK_DIV);  in thead_dwmac_fix_speed()
154 		dev_err(dwmac->dev, "unsupported phy interface %d\n",  in thead_dwmac_fix_speed()
155 			plat->mac_interface);  in thead_dwmac_fix_speed()
162 	struct thead_dwmac *dwmac = plat->bsp_priv;  in thead_dwmac_enable_clk()  local
165 	switch (plat->mac_interface) {  in thead_dwmac_enable_clk()
175 		writel(GMAC_GTXCLK_SEL_PLL, dwmac->apb_base + GMAC_GTXCLK_SEL);  in thead_dwmac_enable_clk()
181 		dev_err(dwmac->dev, "unsupported phy interface %d\n",  in thead_dwmac_enable_clk()
182 			plat->mac_interface);  in thead_dwmac_enable_clk()
183 		return -EINVAL;  in thead_dwmac_enable_clk()
186 	writel(reg, dwmac->apb_base + GMAC_CLK_EN);  in thead_dwmac_enable_clk()
192 	struct thead_dwmac *dwmac = priv;  in thead_dwmac_init()  local
196 	ret = thead_dwmac_set_phy_if(dwmac->plat);  in thead_dwmac_init()
200 	ret = thead_dwmac_set_txclk_dir(dwmac->plat);  in thead_dwmac_init()
204 	reg = readl(dwmac->apb_base + GMAC_RXCLK_DELAY_CTRL);  in thead_dwmac_init()
207 	writel(reg, dwmac->apb_base + GMAC_RXCLK_DELAY_CTRL);  in thead_dwmac_init()
209 	reg = readl(dwmac->apb_base + GMAC_TXCLK_DELAY_CTRL);  in thead_dwmac_init()
212 	writel(reg, dwmac->apb_base + GMAC_TXCLK_DELAY_CTRL);  in thead_dwmac_init()
214 	return thead_dwmac_enable_clk(dwmac->plat);  in thead_dwmac_init()
221 	struct thead_dwmac *dwmac;  in thead_dwmac_probe()  local
227 		return dev_err_probe(&pdev->dev, ret,  in thead_dwmac_probe()
232 		return dev_err_probe(&pdev->dev, PTR_ERR(plat),  in thead_dwmac_probe()
235 	dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);  in thead_dwmac_probe()
236 	if (!dwmac)  in thead_dwmac_probe()
237 		return -ENOMEM;  in thead_dwmac_probe()
241 		return dev_err_probe(&pdev->dev, PTR_ERR(apb),  in thead_dwmac_probe()
244 	dwmac->dev = &pdev->dev;  in thead_dwmac_probe()
245 	dwmac->plat = plat;  in thead_dwmac_probe()
246 	dwmac->apb_base = apb;  in thead_dwmac_probe()
247 	plat->bsp_priv = dwmac;  in thead_dwmac_probe()
248 	plat->fix_mac_speed = thead_dwmac_fix_speed;  in thead_dwmac_probe()
249 	plat->init = thead_dwmac_init;  in thead_dwmac_probe()
255 	{ .compatible = "thead,th1520-gmac" },
263 		.name = "thead-dwmac",
272 MODULE_DESCRIPTION("T-HEAD DWMAC platform driver");