1 // SPDX-License-Identifier: GPL-2.0
4  * Sunplus SP7021 USB 2.0 phy driver
8  * Note 1 : non-posted write command for the registers accesses of
9  * Sunplus SP7021.
18 #include <linux/nvmem-consumer.h>
22 #include <linux/reset.h>
86 	cell = nvmem_cell_get(usbphy->dev, disc_name);  in update_disc_vol()
88 		if (PTR_ERR(cell) == -EPROBE_DEFER)  in update_disc_vol()
89 			return -EPROBE_DEFER;  in update_disc_vol()
98 		set = (set >> usbphy->disc_vol_addr_off) & J_DISC;  in update_disc_vol()
104 	val = readl(usbphy->phy_regs + CONFIG7);  in update_disc_vol()
106 	writel(val, usbphy->phy_regs + CONFIG7);  in update_disc_vol()
117 	ret = clk_prepare_enable(usbphy->phy_clk);  in sp_uphy_init()
121 	ret = reset_control_deassert(usbphy->rstc);  in sp_uphy_init()
126 	writel(HIGH_MASK_BITS | 0x4002, usbphy->moon4_regs + UPHY_CONTROL0);  in sp_uphy_init()
127 	writel(HIGH_MASK_BITS | 0x8747, usbphy->moon4_regs + UPHY_CONTROL1);  in sp_uphy_init()
135 	val = readl(usbphy->phy_regs + CONFIG9);  in sp_uphy_init()
137 	writel(val, usbphy->phy_regs + CONFIG9);  in sp_uphy_init()
139 	val = readl(usbphy->phy_regs + CONFIG1);  in sp_uphy_init()
141 	writel(val, usbphy->phy_regs + CONFIG1);  in sp_uphy_init()
143 	val = readl(usbphy->phy_regs + CONFIG23);  in sp_uphy_init()
145 	writel(val, usbphy->phy_regs + CONFIG23);  in sp_uphy_init()
149 	       usbphy->moon4_regs + UPHY_CONTROL2);  in sp_uphy_init()
153 	       usbphy->phy_regs + CONFIG16);  in sp_uphy_init()
154 	writel(IBG_TRIM0_SSLVHT | J_VDATREE_TRIM_DEFAULT, usbphy->phy_regs + CONFIG17);  in sp_uphy_init()
157 	writel(J_FORCE_DISC_ON | J_DEBUG_CTRL_ADDR_MACRO, usbphy->phy_regs + CONFIG3);  in sp_uphy_init()
162 	reset_control_assert(usbphy->rstc);  in sp_uphy_init()
164 	clk_disable_unprepare(usbphy->phy_clk);  in sp_uphy_init()
175 	pll_pwr_off = (readl(usbphy->moon4_regs + UPHY_CONTROL3) & ~LOW_MASK_BITS)  in sp_uphy_power_on()
177 	pll_pwr_on = (readl(usbphy->moon4_regs + UPHY_CONTROL3) & ~LOW_MASK_BITS)  in sp_uphy_power_on()
181 	       usbphy->moon4_regs + UPHY_CONTROL3);  in sp_uphy_power_on()
184 	       usbphy->moon4_regs + UPHY_CONTROL3);  in sp_uphy_power_on()
187 	       usbphy->moon4_regs + UPHY_CONTROL3);  in sp_uphy_power_on()
190 	       usbphy->moon4_regs + UPHY_CONTROL3);  in sp_uphy_power_on()
193 	       usbphy->moon4_regs + UPHY_CONTROL3);  in sp_uphy_power_on()
203 	pll_pwr_off = (readl(usbphy->moon4_regs + UPHY_CONTROL3) & ~LOW_MASK_BITS)  in sp_uphy_power_off()
207 	       usbphy->moon4_regs + UPHY_CONTROL3);  in sp_uphy_power_off()
210 	       usbphy->moon4_regs + UPHY_CONTROL3);  in sp_uphy_power_off()
219 	reset_control_assert(usbphy->rstc);  in sp_uphy_exit()
220 	clk_disable_unprepare(usbphy->phy_clk);  in sp_uphy_exit()
233 	{.compatible = "sunplus,sp7021-usb2-phy", },
245 	usbphy = devm_kzalloc(&pdev->dev, sizeof(*usbphy), GFP_KERNEL);  in sp_usb_phy_probe()
247 		return -ENOMEM;  in sp_usb_phy_probe()
249 	usbphy->dev = &pdev->dev;  in sp_usb_phy_probe()
251 	usbphy->phy_res_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");  in sp_usb_phy_probe()
252 	usbphy->phy_regs = devm_ioremap_resource(&pdev->dev, usbphy->phy_res_mem);  in sp_usb_phy_probe()
253 	if (IS_ERR(usbphy->phy_regs))  in sp_usb_phy_probe()
254 		return PTR_ERR(usbphy->phy_regs);  in sp_usb_phy_probe()
256 	usbphy->moon4_res_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "moon4");  in sp_usb_phy_probe()
257 	if (!usbphy->moon4_res_mem)  in sp_usb_phy_probe()
258 		return -EINVAL;  in sp_usb_phy_probe()
260 	usbphy->moon4_regs = devm_ioremap(&pdev->dev, usbphy->moon4_res_mem->start,  in sp_usb_phy_probe()
261 					  resource_size(usbphy->moon4_res_mem));  in sp_usb_phy_probe()
262 	if (!usbphy->moon4_regs)  in sp_usb_phy_probe()
263 		return -ENOMEM;  in sp_usb_phy_probe()
265 	usbphy->phy_clk = devm_clk_get(&pdev->dev, NULL);  in sp_usb_phy_probe()
266 	if (IS_ERR(usbphy->phy_clk))  in sp_usb_phy_probe()
267 		return PTR_ERR(usbphy->phy_clk);  in sp_usb_phy_probe()
269 	usbphy->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);  in sp_usb_phy_probe()
270 	if (IS_ERR(usbphy->rstc))  in sp_usb_phy_probe()
271 		return PTR_ERR(usbphy->rstc);  in sp_usb_phy_probe()
273 	of_property_read_u32(pdev->dev.of_node, "sunplus,disc-vol-addr-off",  in sp_usb_phy_probe()
274 			     &usbphy->disc_vol_addr_off);  in sp_usb_phy_probe()
276 	phy = devm_phy_create(&pdev->dev, NULL, &sp_uphy_ops);  in sp_usb_phy_probe()
283 	phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate);  in sp_usb_phy_probe()
291 		.name	= "sunplus-usb2-phy",