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)
56 	struct thead_dwmac *dwmac = plat->bsp_priv;  in thead_dwmac_set_phy_if()  local
59 	switch (plat->mac_interface) {  in thead_dwmac_set_phy_if()
70 		dev_err(dwmac->dev, "unsupported phy interface %d\n",  in thead_dwmac_set_phy_if()
71 			plat->mac_interface);  in thead_dwmac_set_phy_if()
72 		return -EINVAL;  in thead_dwmac_set_phy_if()
75 	writel(phyif, dwmac->apb_base + GMAC_INTF_CTRL);  in thead_dwmac_set_phy_if()
81 	struct thead_dwmac *dwmac = plat->bsp_priv;  in thead_dwmac_set_txclk_dir()  local
84 	switch (plat->mac_interface) {  in thead_dwmac_set_txclk_dir()
95 		dev_err(dwmac->dev, "unsupported phy interface %d\n",  in thead_dwmac_set_txclk_dir()
96 			plat->mac_interface);  in thead_dwmac_set_txclk_dir()
97 		return -EINVAL;  in thead_dwmac_set_txclk_dir()
100 	writel(txclk_dir, dwmac->apb_base + GMAC_TXCLK_OEN);  in thead_dwmac_set_txclk_dir()
107 	struct thead_dwmac *dwmac = bsp_priv;  in thead_set_clk_tx_rate()  local
113 	plat = dwmac->plat;  in thead_set_clk_tx_rate()
115 	switch (plat->mac_interface) {  in thead_set_clk_tx_rate()
124 		rate = clk_get_rate(plat->stmmac_clk);  in thead_set_clk_tx_rate()
126 		writel(0, dwmac->apb_base + GMAC_PLLCLK_DIV);  in thead_set_clk_tx_rate()
130 			dev_err(dwmac->dev, "invalid speed %d\n", speed);  in thead_set_clk_tx_rate()
136 			dev_err(dwmac->dev, "invalid gmac rate %lu\n", rate);  in thead_set_clk_tx_rate()
137 			return -EINVAL;  in thead_set_clk_tx_rate()
142 		writel(reg, dwmac->apb_base + GMAC_PLLCLK_DIV);  in thead_set_clk_tx_rate()
146 		dev_err(dwmac->dev, "unsupported phy interface %d\n",  in thead_set_clk_tx_rate()
147 			plat->mac_interface);  in thead_set_clk_tx_rate()
148 		return -EINVAL;  in thead_set_clk_tx_rate()
154 	struct thead_dwmac *dwmac = plat->bsp_priv;  in thead_dwmac_enable_clk()  local
157 	switch (plat->mac_interface) {  in thead_dwmac_enable_clk()
167 		writel(GMAC_GTXCLK_SEL_PLL, dwmac->apb_base + GMAC_GTXCLK_SEL);  in thead_dwmac_enable_clk()
173 		dev_err(dwmac->dev, "unsupported phy interface %d\n",  in thead_dwmac_enable_clk()
174 			plat->mac_interface);  in thead_dwmac_enable_clk()
175 		return -EINVAL;  in thead_dwmac_enable_clk()
178 	writel(reg, dwmac->apb_base + GMAC_CLK_EN);  in thead_dwmac_enable_clk()
184 	struct thead_dwmac *dwmac = priv;  in thead_dwmac_init()  local
188 	ret = thead_dwmac_set_phy_if(dwmac->plat);  in thead_dwmac_init()
192 	ret = thead_dwmac_set_txclk_dir(dwmac->plat);  in thead_dwmac_init()
196 	reg = readl(dwmac->apb_base + GMAC_RXCLK_DELAY_CTRL);  in thead_dwmac_init()
199 	writel(reg, dwmac->apb_base + GMAC_RXCLK_DELAY_CTRL);  in thead_dwmac_init()
201 	reg = readl(dwmac->apb_base + GMAC_TXCLK_DELAY_CTRL);  in thead_dwmac_init()
204 	writel(reg, dwmac->apb_base + GMAC_TXCLK_DELAY_CTRL);  in thead_dwmac_init()
206 	return thead_dwmac_enable_clk(dwmac->plat);  in thead_dwmac_init()
213 	struct thead_dwmac *dwmac;  in thead_dwmac_probe()  local
219 		return dev_err_probe(&pdev->dev, ret,  in thead_dwmac_probe()
224 		return dev_err_probe(&pdev->dev, PTR_ERR(plat),  in thead_dwmac_probe()
227 	dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);  in thead_dwmac_probe()
228 	if (!dwmac)  in thead_dwmac_probe()
229 		return -ENOMEM;  in thead_dwmac_probe()
233 		return dev_err_probe(&pdev->dev, PTR_ERR(apb),  in thead_dwmac_probe()
236 	dwmac->dev = &pdev->dev;  in thead_dwmac_probe()
237 	dwmac->plat = plat;  in thead_dwmac_probe()
238 	dwmac->apb_base = apb;  in thead_dwmac_probe()
239 	plat->bsp_priv = dwmac;  in thead_dwmac_probe()
240 	plat->set_clk_tx_rate = thead_set_clk_tx_rate;  in thead_dwmac_probe()
241 	plat->init = thead_dwmac_init;  in thead_dwmac_probe()
247 	{ .compatible = "thead,th1520-gmac" },
255 		.name = "thead-dwmac",
264 MODULE_DESCRIPTION("T-HEAD DWMAC platform driver");