1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * dwmac-sti.c - STMicroelectronics DWMAC Specific Glue layer
5  * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
40  * ------------------------------------------------
43  * ------------------------------------------------
45  *|		|  clk-125/txclk |	txclk	   |
46  * ------------------------------------------------
48  *|		|  clk-125/txclk |	clkgen     |
50  * ------------------------------------------------
52  *|		|		 |clkgen/phyclk-in |
53  * ------------------------------------------------
56  *-------------------------------
58  *-------------------------------
60  *-------------------------------
62  *-------------------------------
64  *-------------------------------
66  *-------------------------------
80  * 3 bits [4:2]
81  *	000-GMII/MII
82  *	001-RGMII
83  *	010-SGMII
84  *	100-RMII
88 #define ETH_PHY_SEL_SGMII	BIT(3)
98 	u32 ctrl_reg;		/* GMAC glue-logic control register */
137 	struct sti_dwmac *dwmac = priv;  in stih4xx_fix_retime_src()  local
138 	u32 src = dwmac->tx_retime_src;  in stih4xx_fix_retime_src()
139 	u32 reg = dwmac->ctrl_reg;  in stih4xx_fix_retime_src()
142 	if (dwmac->interface == PHY_INTERFACE_MODE_MII) {  in stih4xx_fix_retime_src()
144 	} else if (dwmac->interface == PHY_INTERFACE_MODE_RMII) {  in stih4xx_fix_retime_src()
145 		if (dwmac->ext_phyclk) {  in stih4xx_fix_retime_src()
151 	} else if (IS_PHY_IF_MODE_RGMII(dwmac->interface)) {  in stih4xx_fix_retime_src()
161 		clk_set_rate(dwmac->clk, freq);  in stih4xx_fix_retime_src()
163 	regmap_update_bits(dwmac->regmap, reg, STIH4XX_RETIME_SRC_MASK,  in stih4xx_fix_retime_src()
167 static int sti_dwmac_set_mode(struct sti_dwmac *dwmac)  in sti_dwmac_set_mode()  argument
169 	struct regmap *regmap = dwmac->regmap;  in sti_dwmac_set_mode()
170 	int iface = dwmac->interface;  in sti_dwmac_set_mode()
171 	u32 reg = dwmac->ctrl_reg;  in sti_dwmac_set_mode()
174 	if (dwmac->gmac_en)  in sti_dwmac_set_mode()
182 	dwmac->fix_retime_src(dwmac, dwmac->speed, 0);  in sti_dwmac_set_mode()
187 static int sti_dwmac_parse_data(struct sti_dwmac *dwmac,  in sti_dwmac_parse_data()  argument
192 	struct device *dev = &pdev->dev;  in sti_dwmac_parse_data()
193 	struct device_node *np = dev->of_node;  in sti_dwmac_parse_data()
198 	dwmac->clk_sel_reg = -ENXIO;  in sti_dwmac_parse_data()
199 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sti-clkconf");  in sti_dwmac_parse_data()
201 		dwmac->clk_sel_reg = res->start;  in sti_dwmac_parse_data()
204 						      1, &dwmac->ctrl_reg);  in sti_dwmac_parse_data()
208 	dwmac->interface = plat_dat->phy_interface;  in sti_dwmac_parse_data()
209 	dwmac->regmap = regmap;  in sti_dwmac_parse_data()
210 	dwmac->gmac_en = of_property_read_bool(np, "st,gmac_en");  in sti_dwmac_parse_data()
211 	dwmac->ext_phyclk = of_property_read_bool(np, "st,ext-phyclk");  in sti_dwmac_parse_data()
212 	dwmac->tx_retime_src = TX_RETIME_SRC_NA;  in sti_dwmac_parse_data()
213 	dwmac->speed = SPEED_100;  in sti_dwmac_parse_data()
215 	if (IS_PHY_IF_MODE_GBIT(dwmac->interface)) {  in sti_dwmac_parse_data()
218 		dwmac->tx_retime_src = TX_RETIME_SRC_CLKGEN;  in sti_dwmac_parse_data()
220 		err = of_property_read_string(np, "st,tx-retime-src", &rs);  in sti_dwmac_parse_data()
225 				dwmac->tx_retime_src = TX_RETIME_SRC_CLK_125;  in sti_dwmac_parse_data()
227 				dwmac->tx_retime_src = TX_RETIME_SRC_TXCLK;  in sti_dwmac_parse_data()
229 		dwmac->speed = SPEED_1000;  in sti_dwmac_parse_data()
232 	dwmac->clk = devm_clk_get(dev, "sti-ethclk");  in sti_dwmac_parse_data()
233 	if (IS_ERR(dwmac->clk)) {  in sti_dwmac_parse_data()
235 		dwmac->clk = NULL;  in sti_dwmac_parse_data()
246 	struct sti_dwmac *dwmac;  in sti_dwmac_probe()  local
249 	data = of_device_get_match_data(&pdev->dev);  in sti_dwmac_probe()
251 		dev_err(&pdev->dev, "No OF match data provided\n");  in sti_dwmac_probe()
252 		return -EINVAL;  in sti_dwmac_probe()
263 	dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);  in sti_dwmac_probe()
264 	if (!dwmac)  in sti_dwmac_probe()
265 		return -ENOMEM;  in sti_dwmac_probe()
267 	ret = sti_dwmac_parse_data(dwmac, pdev, plat_dat);  in sti_dwmac_probe()
269 		dev_err(&pdev->dev, "Unable to parse OF data\n");  in sti_dwmac_probe()
273 	dwmac->fix_retime_src = data->fix_retime_src;  in sti_dwmac_probe()
275 	plat_dat->bsp_priv = dwmac;  in sti_dwmac_probe()
276 	plat_dat->fix_mac_speed = data->fix_retime_src;  in sti_dwmac_probe()
278 	ret = clk_prepare_enable(dwmac->clk);  in sti_dwmac_probe()
282 	ret = sti_dwmac_set_mode(dwmac);  in sti_dwmac_probe()
286 	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);  in sti_dwmac_probe()
293 	clk_disable_unprepare(dwmac->clk);  in sti_dwmac_probe()
300 	struct sti_dwmac *dwmac = get_stmmac_bsp_priv(&pdev->dev);  in sti_dwmac_remove()  local
302 	stmmac_dvr_remove(&pdev->dev);  in sti_dwmac_remove()
304 	clk_disable_unprepare(dwmac->clk);  in sti_dwmac_remove()
309 	struct sti_dwmac *dwmac = get_stmmac_bsp_priv(dev);  in sti_dwmac_suspend()  local
312 	clk_disable_unprepare(dwmac->clk);  in sti_dwmac_suspend()
319 	struct sti_dwmac *dwmac = get_stmmac_bsp_priv(dev);  in sti_dwmac_resume()  local
321 	clk_prepare_enable(dwmac->clk);  in sti_dwmac_resume()
322 	sti_dwmac_set_mode(dwmac);  in sti_dwmac_resume()
335 	{ .compatible = "st,stih407-dwmac", .data = &stih4xx_dwmac_data},
344 		.name           = "sti-dwmac",
352 MODULE_DESCRIPTION("STMicroelectronics DWMAC Specific Glue layer");