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
43  * ------------------------------------------------
46  * ------------------------------------------------
48  *|		|  clk-125/txclk |	txclk	   |
49  * ------------------------------------------------
51  *|		|  clk-125/txclk |	clkgen     |
53  * ------------------------------------------------
55  *|		|		 |clkgen/phyclk-in |
56  * ------------------------------------------------
59  *-------------------------------
61  *-------------------------------
63  *-------------------------------
65  *-------------------------------
67  *-------------------------------
69  *-------------------------------
77 #define ENMII_MASK	GENMASK(5, 5)
78 #define ENMII		BIT(5)
84  *	000-GMII/MII
85  *	001-RGMII
86  *	010-SGMII
87  *	100-RMII
101 	u32 ctrl_reg;		/* GMAC glue-logic control register */
140 	struct sti_dwmac *dwmac = priv;  in stih4xx_fix_retime_src()  local
141 	u32 src = dwmac->tx_retime_src;  in stih4xx_fix_retime_src()
142 	u32 reg = dwmac->ctrl_reg;  in stih4xx_fix_retime_src()
145 	if (dwmac->interface == PHY_INTERFACE_MODE_MII) {  in stih4xx_fix_retime_src()
147 	} else if (dwmac->interface == PHY_INTERFACE_MODE_RMII) {  in stih4xx_fix_retime_src()
148 		if (dwmac->ext_phyclk) {  in stih4xx_fix_retime_src()
154 	} else if (IS_PHY_IF_MODE_RGMII(dwmac->interface)) {  in stih4xx_fix_retime_src()
169 		clk_set_rate(dwmac->clk, freq);  in stih4xx_fix_retime_src()
171 	regmap_update_bits(dwmac->regmap, reg, STIH4XX_RETIME_SRC_MASK,  in stih4xx_fix_retime_src()
175 static int sti_dwmac_set_mode(struct sti_dwmac *dwmac)  in sti_dwmac_set_mode()  argument
177 	struct regmap *regmap = dwmac->regmap;  in sti_dwmac_set_mode()
178 	int iface = dwmac->interface;  in sti_dwmac_set_mode()
179 	u32 reg = dwmac->ctrl_reg;  in sti_dwmac_set_mode()
182 	if (dwmac->gmac_en)  in sti_dwmac_set_mode()
190 	dwmac->fix_retime_src(dwmac, dwmac->speed, 0);  in sti_dwmac_set_mode()
195 static int sti_dwmac_parse_data(struct sti_dwmac *dwmac,  in sti_dwmac_parse_data()  argument
199 	struct device *dev = &pdev->dev;  in sti_dwmac_parse_data()
200 	struct device_node *np = dev->of_node;  in sti_dwmac_parse_data()
205 	dwmac->clk_sel_reg = -ENXIO;  in sti_dwmac_parse_data()
206 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sti-clkconf");  in sti_dwmac_parse_data()
208 		dwmac->clk_sel_reg = res->start;  in sti_dwmac_parse_data()
214 	err = of_property_read_u32_index(np, "st,syscon", 1, &dwmac->ctrl_reg);  in sti_dwmac_parse_data()
220 	err = of_get_phy_mode(np, &dwmac->interface);  in sti_dwmac_parse_data()
221 	if (err && err != -ENODEV) {  in sti_dwmac_parse_data()
222 		dev_err(dev, "Can't get phy-mode\n");  in sti_dwmac_parse_data()
226 	dwmac->regmap = regmap;  in sti_dwmac_parse_data()
227 	dwmac->gmac_en = of_property_read_bool(np, "st,gmac_en");  in sti_dwmac_parse_data()
228 	dwmac->ext_phyclk = of_property_read_bool(np, "st,ext-phyclk");  in sti_dwmac_parse_data()
229 	dwmac->tx_retime_src = TX_RETIME_SRC_NA;  in sti_dwmac_parse_data()
230 	dwmac->speed = SPEED_100;  in sti_dwmac_parse_data()
232 	if (IS_PHY_IF_MODE_GBIT(dwmac->interface)) {  in sti_dwmac_parse_data()
235 		dwmac->tx_retime_src = TX_RETIME_SRC_CLKGEN;  in sti_dwmac_parse_data()
237 		err = of_property_read_string(np, "st,tx-retime-src", &rs);  in sti_dwmac_parse_data()
242 				dwmac->tx_retime_src = TX_RETIME_SRC_CLK_125;  in sti_dwmac_parse_data()
244 				dwmac->tx_retime_src = TX_RETIME_SRC_TXCLK;  in sti_dwmac_parse_data()
246 		dwmac->speed = SPEED_1000;  in sti_dwmac_parse_data()
249 	dwmac->clk = devm_clk_get(dev, "sti-ethclk");  in sti_dwmac_parse_data()
250 	if (IS_ERR(dwmac->clk)) {  in sti_dwmac_parse_data()
252 		dwmac->clk = NULL;  in sti_dwmac_parse_data()
263 	struct sti_dwmac *dwmac;  in sti_dwmac_probe()  local
266 	data = of_device_get_match_data(&pdev->dev);  in sti_dwmac_probe()
268 		dev_err(&pdev->dev, "No OF match data provided\n");  in sti_dwmac_probe()
269 		return -EINVAL;  in sti_dwmac_probe()
280 	dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);  in sti_dwmac_probe()
281 	if (!dwmac)  in sti_dwmac_probe()
282 		return -ENOMEM;  in sti_dwmac_probe()
284 	ret = sti_dwmac_parse_data(dwmac, pdev);  in sti_dwmac_probe()
286 		dev_err(&pdev->dev, "Unable to parse OF data\n");  in sti_dwmac_probe()
290 	dwmac->fix_retime_src = data->fix_retime_src;  in sti_dwmac_probe()
292 	plat_dat->bsp_priv = dwmac;  in sti_dwmac_probe()
293 	plat_dat->fix_mac_speed = data->fix_retime_src;  in sti_dwmac_probe()
295 	ret = clk_prepare_enable(dwmac->clk);  in sti_dwmac_probe()
299 	ret = sti_dwmac_set_mode(dwmac);  in sti_dwmac_probe()
303 	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);  in sti_dwmac_probe()
310 	clk_disable_unprepare(dwmac->clk);  in sti_dwmac_probe()
317 	struct sti_dwmac *dwmac = get_stmmac_bsp_priv(&pdev->dev);  in sti_dwmac_remove()  local
319 	stmmac_dvr_remove(&pdev->dev);  in sti_dwmac_remove()
321 	clk_disable_unprepare(dwmac->clk);  in sti_dwmac_remove()
327 	struct sti_dwmac *dwmac = get_stmmac_bsp_priv(dev);  in sti_dwmac_suspend()  local
330 	clk_disable_unprepare(dwmac->clk);  in sti_dwmac_suspend()
337 	struct sti_dwmac *dwmac = get_stmmac_bsp_priv(dev);  in sti_dwmac_resume()  local
339 	clk_prepare_enable(dwmac->clk);  in sti_dwmac_resume()
340 	sti_dwmac_set_mode(dwmac);  in sti_dwmac_resume()
354 	{ .compatible = "st,stih407-dwmac", .data = &stih4xx_dwmac_data},
363 		.name           = "sti-dwmac",
371 MODULE_DESCRIPTION("STMicroelectronics DWMAC Specific Glue layer");