1 // SPDX-License-Identifier: GPL-2.0
3  * drivers/usb/host/ehci-orion.c
13 #include <linux/platform_data/usb-ehci-orion.h>
15 #include <linux/phy/phy.h>
18 #include <linux/usb.h>
19 #include <linux/usb/hcd.h>
21 #include <linux/dma-mapping.h>
25 #define rdl(off)	readl_relaxed(hcd->regs + (off))
26 #define wrl(off, val)	writel_relaxed((val), hcd->regs + (off))
61 #define hcd_to_orion_priv(h) ((struct orion_ehci_hcd *)hcd_to_ehci(h)->priv)
65 	struct phy *phy;  member
71  * Implement Orion USB controller specification guidelines
83 	 * Reset controller  in orion_usb_phy_v1_setup()
89 	 * GL# USB-10: Set IPG for non start of frame packets  in orion_usb_phy_v1_setup()
95 	 * GL# USB-9: USB 2.0 Power Control  in orion_usb_phy_v1_setup()
101 	 * GL# USB-1: USB PHY Tx Control - force calibration to '8'  in orion_usb_phy_v1_setup()
107 	 * GL# USB-3 GL# USB-9: USB PHY Rx Control  in orion_usb_phy_v1_setup()
114 	 * GL# USB-3 GL# USB-9: USB PHY IVREF Control  in orion_usb_phy_v1_setup()
120 	 * GL# USB-3 GL# USB-9: USB PHY Test Group Control  in orion_usb_phy_v1_setup()
126 	 * Stop and reset controller  in orion_usb_phy_v1_setup()
133 	 * GL# USB-5 Streaming disable REG_USB_MODE[4]=1  in orion_usb_phy_v1_setup()
135 	 * GL# USB-4 Setup USB Host mode  in orion_usb_phy_v1_setup()
151 	for (i = 0; i < dram->num_cs; i++) {  in ehci_orion_conf_mbus_windows()
152 		const struct mbus_dram_window *cs = dram->cs + i;  in ehci_orion_conf_mbus_windows()
154 		wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |  in ehci_orion_conf_mbus_windows()
155 					(cs->mbus_attr << 8) |  in ehci_orion_conf_mbus_windows()
156 					(dram->mbus_dram_target_id << 4) | 1);  in ehci_orion_conf_mbus_windows()
157 		wrl(USB_WINDOW_BASE(i), cs->base);  in ehci_orion_conf_mbus_windows()
163 	struct device *dev = hcd->self.controller;  in ehci_orion_drv_reset()
174 	 * sbuscfg reg has to be set after usb controller reset, otherwise  in ehci_orion_drv_reset()
177 	if (of_device_is_compatible(dev->of_node, "marvell,armada-3700-ehci"))  in ehci_orion_drv_reset()
207 	struct orion_ehci_data *pd = dev_get_platdata(&pdev->dev);  in ehci_orion_drv_probe()
218 		return -ENODEV;  in ehci_orion_drv_probe()
220 	pr_debug("Initializing Orion-SoC USB Host Controller\n");  in ehci_orion_drv_probe()
224 		err = -ENODEV;  in ehci_orion_drv_probe()
229 	 * Right now device-tree probed devices don't get dma_mask  in ehci_orion_drv_probe()
230 	 * set. Since shared usb code relies on it, set it here for  in ehci_orion_drv_probe()
233 	err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));  in ehci_orion_drv_probe()
238 	regs = devm_ioremap_resource(&pdev->dev, res);  in ehci_orion_drv_probe()
245 			&pdev->dev, dev_name(&pdev->dev));  in ehci_orion_drv_probe()
247 		err = -ENOMEM;  in ehci_orion_drv_probe()
251 	hcd->rsrc_start = res->start;  in ehci_orion_drv_probe()
252 	hcd->rsrc_len = resource_size(res);  in ehci_orion_drv_probe()
253 	hcd->regs = regs;  in ehci_orion_drv_probe()
256 	ehci->caps = hcd->regs + 0x100;  in ehci_orion_drv_probe()
257 	hcd->has_tt = 1;  in ehci_orion_drv_probe()
264 	priv->clk = devm_clk_get(&pdev->dev, NULL);  in ehci_orion_drv_probe()
265 	if (!IS_ERR(priv->clk)) {  in ehci_orion_drv_probe()
266 		err = clk_prepare_enable(priv->clk);  in ehci_orion_drv_probe()
271 	priv->phy = devm_phy_optional_get(&pdev->dev, "usb");  in ehci_orion_drv_probe()
272 	if (IS_ERR(priv->phy)) {  in ehci_orion_drv_probe()
273 		err = PTR_ERR(priv->phy);  in ehci_orion_drv_probe()
274 		if (err != -ENOSYS)  in ehci_orion_drv_probe()
279 	 * (Re-)program MBUS remapping windows if we are asked to.  in ehci_orion_drv_probe()
286 	 * setup Orion USB controller.  in ehci_orion_drv_probe()
288 	if (pdev->dev.of_node)  in ehci_orion_drv_probe()
291 		phy_version = pd->phy_version;  in ehci_orion_drv_probe()
294 	case EHCI_PHY_NA:	/* dont change USB phy settings */  in ehci_orion_drv_probe()
302 		dev_warn(&pdev->dev, "USB phy version isn't supported.\n");  in ehci_orion_drv_probe()
309 	device_wakeup_enable(hcd->self.controller);  in ehci_orion_drv_probe()
313 	if (!IS_ERR(priv->clk))  in ehci_orion_drv_probe()
314 		clk_disable_unprepare(priv->clk);  in ehci_orion_drv_probe()
318 	dev_err(&pdev->dev, "init %s fail, %d\n",  in ehci_orion_drv_probe()
319 		dev_name(&pdev->dev), err);  in ehci_orion_drv_probe()
331 	if (!IS_ERR(priv->clk))  in ehci_orion_drv_remove()
332 		clk_disable_unprepare(priv->clk);  in ehci_orion_drv_remove()
340 	{ .compatible = "marvell,orion-ehci", },
341 	{ .compatible = "marvell,armada-3700-ehci", },
351 		.name	= "orion-ehci",
360 		return -ENODEV;  in ehci_orion_init()
374 MODULE_ALIAS("platform:orion-ehci");