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
44  * ------------------------------------------------
47  * ------------------------------------------------
49  *|		|  clk-125/txclk |	txclk	   |
50  * ------------------------------------------------
52  *|		|  clk-125/txclk |	clkgen     |
54  * ------------------------------------------------
56  *|		|		 |clkgen/phyclk-in |
57  * ------------------------------------------------
60  *-------------------------------
62  *-------------------------------
64  *-------------------------------
66  *-------------------------------
68  *-------------------------------
70  *-------------------------------
79  *-----------------------
81  *-----------------------
83  *-----------------------
86  *-----------------------
89  *-----------------------
92  *-----------------------
105  * 3 bits [4:2]
106  *	000-GMII/MII
107  *	001-RGMII
108  *	010-SGMII
109  *	100-RMII
111 #define MII_PHY_SEL_MASK	GENMASK(4, 2)
112 #define ETH_PHY_SEL_RMII	BIT(4)
123 	u32 ctrl_reg;		/* GMAC glue-logic control register */
162 	struct sti_dwmac *dwmac = priv;  in stih4xx_fix_retime_src()  local
163 	u32 src = dwmac->tx_retime_src;  in stih4xx_fix_retime_src()
164 	u32 reg = dwmac->ctrl_reg;  in stih4xx_fix_retime_src()
167 	if (dwmac->interface == PHY_INTERFACE_MODE_MII) {  in stih4xx_fix_retime_src()
169 	} else if (dwmac->interface == PHY_INTERFACE_MODE_RMII) {  in stih4xx_fix_retime_src()
170 		if (dwmac->ext_phyclk) {  in stih4xx_fix_retime_src()
176 	} else if (IS_PHY_IF_MODE_RGMII(dwmac->interface)) {  in stih4xx_fix_retime_src()
191 		clk_set_rate(dwmac->clk, freq);  in stih4xx_fix_retime_src()
193 	regmap_update_bits(dwmac->regmap, reg, STIH4XX_RETIME_SRC_MASK,  in stih4xx_fix_retime_src()
199 	struct sti_dwmac *dwmac = priv;  in stid127_fix_retime_src()  local
200 	u32 reg = dwmac->ctrl_reg;  in stid127_fix_retime_src()
204 	if (dwmac->interface == PHY_INTERFACE_MODE_MII) {  in stid127_fix_retime_src()
206 	} else if (dwmac->interface == PHY_INTERFACE_MODE_RMII) {  in stid127_fix_retime_src()
207 		if (!dwmac->ext_phyclk) {  in stid127_fix_retime_src()
211 	} else if (IS_PHY_IF_MODE_RGMII(dwmac->interface)) {  in stid127_fix_retime_src()
222 		clk_set_rate(dwmac->clk, freq);  in stid127_fix_retime_src()
224 	regmap_update_bits(dwmac->regmap, reg, STID127_RETIME_SRC_MASK, val);  in stid127_fix_retime_src()
227 static int sti_dwmac_set_mode(struct sti_dwmac *dwmac)  in sti_dwmac_set_mode()  argument
229 	struct regmap *regmap = dwmac->regmap;  in sti_dwmac_set_mode()
230 	int iface = dwmac->interface;  in sti_dwmac_set_mode()
231 	u32 reg = dwmac->ctrl_reg;  in sti_dwmac_set_mode()
234 	if (dwmac->gmac_en)  in sti_dwmac_set_mode()
242 	dwmac->fix_retime_src(dwmac, dwmac->speed);  in sti_dwmac_set_mode()
247 static int sti_dwmac_parse_data(struct sti_dwmac *dwmac,  in sti_dwmac_parse_data()  argument
251 	struct device *dev = &pdev->dev;  in sti_dwmac_parse_data()
252 	struct device_node *np = dev->of_node;  in sti_dwmac_parse_data()
257 	dwmac->clk_sel_reg = -ENXIO;  in sti_dwmac_parse_data()
258 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sti-clkconf");  in sti_dwmac_parse_data()
260 		dwmac->clk_sel_reg = res->start;  in sti_dwmac_parse_data()
266 	err = of_property_read_u32_index(np, "st,syscon", 1, &dwmac->ctrl_reg);  in sti_dwmac_parse_data()
272 	err = of_get_phy_mode(np, &dwmac->interface);  in sti_dwmac_parse_data()
273 	if (err && err != -ENODEV) {  in sti_dwmac_parse_data()
274 		dev_err(dev, "Can't get phy-mode\n");  in sti_dwmac_parse_data()
278 	dwmac->regmap = regmap;  in sti_dwmac_parse_data()
279 	dwmac->gmac_en = of_property_read_bool(np, "st,gmac_en");  in sti_dwmac_parse_data()
280 	dwmac->ext_phyclk = of_property_read_bool(np, "st,ext-phyclk");  in sti_dwmac_parse_data()
281 	dwmac->tx_retime_src = TX_RETIME_SRC_NA;  in sti_dwmac_parse_data()
282 	dwmac->speed = SPEED_100;  in sti_dwmac_parse_data()
284 	if (IS_PHY_IF_MODE_GBIT(dwmac->interface)) {  in sti_dwmac_parse_data()
287 		dwmac->tx_retime_src = TX_RETIME_SRC_CLKGEN;  in sti_dwmac_parse_data()
289 		err = of_property_read_string(np, "st,tx-retime-src", &rs);  in sti_dwmac_parse_data()
294 				dwmac->tx_retime_src = TX_RETIME_SRC_CLK_125;  in sti_dwmac_parse_data()
296 				dwmac->tx_retime_src = TX_RETIME_SRC_TXCLK;  in sti_dwmac_parse_data()
298 		dwmac->speed = SPEED_1000;  in sti_dwmac_parse_data()
301 	dwmac->clk = devm_clk_get(dev, "sti-ethclk");  in sti_dwmac_parse_data()
302 	if (IS_ERR(dwmac->clk)) {  in sti_dwmac_parse_data()
304 		dwmac->clk = NULL;  in sti_dwmac_parse_data()
315 	struct sti_dwmac *dwmac;  in sti_dwmac_probe()  local
318 	data = of_device_get_match_data(&pdev->dev);  in sti_dwmac_probe()
320 		dev_err(&pdev->dev, "No OF match data provided\n");  in sti_dwmac_probe()
321 		return -EINVAL;  in sti_dwmac_probe()
332 	dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);  in sti_dwmac_probe()
333 	if (!dwmac) {  in sti_dwmac_probe()
334 		ret = -ENOMEM;  in sti_dwmac_probe()
338 	ret = sti_dwmac_parse_data(dwmac, pdev);  in sti_dwmac_probe()
340 		dev_err(&pdev->dev, "Unable to parse OF data\n");  in sti_dwmac_probe()
344 	dwmac->fix_retime_src = data->fix_retime_src;  in sti_dwmac_probe()
346 	plat_dat->bsp_priv = dwmac;  in sti_dwmac_probe()
347 	plat_dat->fix_mac_speed = data->fix_retime_src;  in sti_dwmac_probe()
349 	ret = clk_prepare_enable(dwmac->clk);  in sti_dwmac_probe()
353 	ret = sti_dwmac_set_mode(dwmac);  in sti_dwmac_probe()
357 	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);  in sti_dwmac_probe()
364 	clk_disable_unprepare(dwmac->clk);  in sti_dwmac_probe()
373 	struct sti_dwmac *dwmac = get_stmmac_bsp_priv(&pdev->dev);  in sti_dwmac_remove()  local
374 	int ret = stmmac_dvr_remove(&pdev->dev);  in sti_dwmac_remove()
376 	clk_disable_unprepare(dwmac->clk);  in sti_dwmac_remove()
384 	struct sti_dwmac *dwmac = get_stmmac_bsp_priv(dev);  in sti_dwmac_suspend()  local
387 	clk_disable_unprepare(dwmac->clk);  in sti_dwmac_suspend()
394 	struct sti_dwmac *dwmac = get_stmmac_bsp_priv(dev);  in sti_dwmac_resume()  local
396 	clk_prepare_enable(dwmac->clk);  in sti_dwmac_resume()
397 	sti_dwmac_set_mode(dwmac);  in sti_dwmac_resume()
415 	{ .compatible = "st,stih415-dwmac", .data = &stih4xx_dwmac_data},
416 	{ .compatible = "st,stih416-dwmac", .data = &stih4xx_dwmac_data},
417 	{ .compatible = "st,stid127-dwmac", .data = &stid127_dwmac_data},
418 	{ .compatible = "st,stih407-dwmac", .data = &stih4xx_dwmac_data},
427 		.name           = "sti-dwmac",
435 MODULE_DESCRIPTION("STMicroelectronics DWMAC Specific Glue layer");