1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 2017-2018 HiSilicon Co., Ltd. http://www.hisilicon.com
11 #include <linux/dma-mapping.h>
46 	return dev_get_drvdata(hcd->self.controller);  in hcd_to_histb()
51 	struct device_node *np = histb->dev->of_node;  in xhci_histb_config()
54 	if (of_property_match_string(np, "phys-names", "inno") >= 0) {  in xhci_histb_config()
55 		/* USB2 PHY chose ulpi 8bit interface */  in xhci_histb_config()
56 		regval = readl(histb->ctrl + REG_GUSB2PHYCFG0);  in xhci_histb_config()
60 		writel(regval, histb->ctrl + REG_GUSB2PHYCFG0);  in xhci_histb_config()
63 	if (of_property_match_string(np, "phys-names", "combo") >= 0) {  in xhci_histb_config()
68 		 * GUSB3PIPECTL0[2:1] = 01 : Tx Deemphasis = -3.5dB,  in xhci_histb_config()
71 		regval = readl(histb->ctrl + REG_GUSB3PIPECTL0);  in xhci_histb_config()
75 		writel(regval, histb->ctrl + REG_GUSB3PIPECTL0);  in xhci_histb_config()
78 	writel(0x23100000, histb->ctrl + GTXTHRCFG);  in xhci_histb_config()
79 	writel(0x23100000, histb->ctrl + GRXTHRCFG);  in xhci_histb_config()
86 	struct device *dev = histb->dev;  in xhci_histb_clks_get()
88 	histb->bus_clk = devm_clk_get(dev, "bus");  in xhci_histb_clks_get()
89 	if (IS_ERR(histb->bus_clk)) {  in xhci_histb_clks_get()
91 		return PTR_ERR(histb->bus_clk);  in xhci_histb_clks_get()
94 	histb->utmi_clk = devm_clk_get(dev, "utmi");  in xhci_histb_clks_get()
95 	if (IS_ERR(histb->utmi_clk)) {  in xhci_histb_clks_get()
97 		return PTR_ERR(histb->utmi_clk);  in xhci_histb_clks_get()
100 	histb->pipe_clk = devm_clk_get(dev, "pipe");  in xhci_histb_clks_get()
101 	if (IS_ERR(histb->pipe_clk)) {  in xhci_histb_clks_get()
103 		return PTR_ERR(histb->pipe_clk);  in xhci_histb_clks_get()
106 	histb->suspend_clk = devm_clk_get(dev, "suspend");  in xhci_histb_clks_get()
107 	if (IS_ERR(histb->suspend_clk)) {  in xhci_histb_clks_get()
109 		return PTR_ERR(histb->suspend_clk);  in xhci_histb_clks_get()
119 	ret = clk_prepare_enable(histb->bus_clk);  in xhci_histb_host_enable()
121 		dev_err(histb->dev, "failed to enable bus clk\n");  in xhci_histb_host_enable()
125 	ret = clk_prepare_enable(histb->utmi_clk);  in xhci_histb_host_enable()
127 		dev_err(histb->dev, "failed to enable utmi clk\n");  in xhci_histb_host_enable()
131 	ret = clk_prepare_enable(histb->pipe_clk);  in xhci_histb_host_enable()
133 		dev_err(histb->dev, "failed to enable pipe clk\n");  in xhci_histb_host_enable()
137 	ret = clk_prepare_enable(histb->suspend_clk);  in xhci_histb_host_enable()
139 		dev_err(histb->dev, "failed to enable suspend clk\n");  in xhci_histb_host_enable()
143 	reset_control_deassert(histb->soft_reset);  in xhci_histb_host_enable()
148 	clk_disable_unprepare(histb->pipe_clk);  in xhci_histb_host_enable()
150 	clk_disable_unprepare(histb->utmi_clk);  in xhci_histb_host_enable()
152 	clk_disable_unprepare(histb->bus_clk);  in xhci_histb_host_enable()
159 	reset_control_assert(histb->soft_reset);  in xhci_histb_host_disable()
161 	clk_disable_unprepare(histb->suspend_clk);  in xhci_histb_host_disable()
162 	clk_disable_unprepare(histb->pipe_clk);  in xhci_histb_host_disable()
163 	clk_disable_unprepare(histb->utmi_clk);  in xhci_histb_host_disable()
164 	clk_disable_unprepare(histb->bus_clk);  in xhci_histb_host_disable()
174 	xhci->quirks |= XHCI_PLAT;  in xhci_histb_quirks()
199 	struct device *dev = &pdev->dev;  in xhci_histb_probe()
206 	int ret = -ENODEV;  in xhci_histb_probe()
209 		return -ENODEV;  in xhci_histb_probe()
214 		return -ENOMEM;  in xhci_histb_probe()
216 	histb->dev = dev;  in xhci_histb_probe()
222 	histb->ctrl = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in xhci_histb_probe()
223 	if (IS_ERR(histb->ctrl))  in xhci_histb_probe()
224 		return PTR_ERR(histb->ctrl);  in xhci_histb_probe()
230 	histb->soft_reset = devm_reset_control_get(dev, "soft");  in xhci_histb_probe()
231 	if (IS_ERR(histb->soft_reset)) {  in xhci_histb_probe()
233 		return PTR_ERR(histb->soft_reset);  in xhci_histb_probe()
240 	/* Initialize dma_mask and coherent_dma_mask to 32-bits */  in xhci_histb_probe()
247 		ret = -ENOMEM;  in xhci_histb_probe()
251 	hcd->regs = histb->ctrl;  in xhci_histb_probe()
252 	hcd->rsrc_start = res->start;  in xhci_histb_probe()
253 	hcd->rsrc_len = resource_size(res);  in xhci_histb_probe()
255 	histb->hcd = hcd;  in xhci_histb_probe()
256 	dev_set_drvdata(hcd->self.controller, histb);  in xhci_histb_probe()
264 	device_wakeup_enable(hcd->self.controller);  in xhci_histb_probe()
266 	xhci->main_hcd = hcd;  in xhci_histb_probe()
267 	xhci->shared_hcd = usb_create_shared_hcd(driver, dev, dev_name(dev),  in xhci_histb_probe()
269 	if (!xhci->shared_hcd) {  in xhci_histb_probe()
270 		ret = -ENOMEM;  in xhci_histb_probe()
274 	if (device_property_read_bool(dev, "usb2-lpm-disable"))  in xhci_histb_probe()
275 		xhci->quirks |= XHCI_HW_LPM_DISABLE;  in xhci_histb_probe()
277 	if (device_property_read_bool(dev, "usb3-lpm-capable"))  in xhci_histb_probe()
278 		xhci->quirks |= XHCI_LPM_SUPPORT;  in xhci_histb_probe()
281 	xhci->imod_interval = 40000;  in xhci_histb_probe()
282 	device_property_read_u32(dev, "imod-interval-ns",  in xhci_histb_probe()
283 				 &xhci->imod_interval);  in xhci_histb_probe()
289 	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)  in xhci_histb_probe()
290 		xhci->shared_hcd->can_do_streams = 1;  in xhci_histb_probe()
292 	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);  in xhci_histb_probe()
310 	usb_put_hcd(xhci->shared_hcd);  in xhci_histb_probe()
325 	struct usb_hcd *hcd = histb->hcd;  in xhci_histb_remove()
327 	struct usb_hcd *shared_hcd = xhci->shared_hcd;  in xhci_histb_remove()
329 	xhci->xhc_state |= XHCI_STATE_REMOVING;  in xhci_histb_remove()
332 	xhci->shared_hcd = NULL;  in xhci_histb_remove()
333 	device_wakeup_disable(&dev->dev);  in xhci_histb_remove()
340 	pm_runtime_put_sync(&dev->dev);  in xhci_histb_remove()
341 	pm_runtime_disable(&dev->dev);  in xhci_histb_remove()
349 	struct usb_hcd *hcd = histb->hcd;  in xhci_histb_suspend()
364 	struct usb_hcd *hcd = histb->hcd;  in xhci_histb_resume()
380 	{ .compatible = "hisilicon,hi3798cv200-xhci"},
390 		.name = "xhci-histb",
395 MODULE_ALIAS("platform:xhci-histb");