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>
16 #include <linux/usb.h>
17 #include <linux/usb/hcd.h>
19 #include <linux/dma-mapping.h>
23 #define rdl(off)	readl_relaxed(hcd->regs + (off))
24 #define wrl(off, val)	writel_relaxed((val), hcd->regs + (off))
59 #define hcd_to_orion_priv(h) ((struct orion_ehci_hcd *)hcd_to_ehci(h)->priv)
63 	struct phy *phy;  member
69  * Implement Orion USB controller specification guidelines
81 	 * Reset controller  in orion_usb_phy_v1_setup()
87 	 * GL# USB-10: Set IPG for non start of frame packets  in orion_usb_phy_v1_setup()
93 	 * GL# USB-9: USB 2.0 Power Control  in orion_usb_phy_v1_setup()
99 	 * GL# USB-1: USB PHY Tx Control - force calibration to '8'  in orion_usb_phy_v1_setup()
105 	 * GL# USB-3 GL# USB-9: USB PHY Rx Control  in orion_usb_phy_v1_setup()
112 	 * GL# USB-3 GL# USB-9: USB PHY IVREF Control  in orion_usb_phy_v1_setup()
118 	 * GL# USB-3 GL# USB-9: USB PHY Test Group Control  in orion_usb_phy_v1_setup()
124 	 * Stop and reset controller  in orion_usb_phy_v1_setup()
131 	 * GL# USB-5 Streaming disable REG_USB_MODE[4]=1  in orion_usb_phy_v1_setup()
133 	 * GL# USB-4 Setup USB Host mode  in orion_usb_phy_v1_setup()
149 	for (i = 0; i < dram->num_cs; i++) {  in ehci_orion_conf_mbus_windows()
150 		const struct mbus_dram_window *cs = dram->cs + i;  in ehci_orion_conf_mbus_windows()
152 		wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |  in ehci_orion_conf_mbus_windows()
153 					(cs->mbus_attr << 8) |  in ehci_orion_conf_mbus_windows()
154 					(dram->mbus_dram_target_id << 4) | 1);  in ehci_orion_conf_mbus_windows()
155 		wrl(USB_WINDOW_BASE(i), cs->base);  in ehci_orion_conf_mbus_windows()
161 	struct device *dev = hcd->self.controller;  in ehci_orion_drv_reset()
172 	 * sbuscfg reg has to be set after usb controller reset, otherwise  in ehci_orion_drv_reset()
175 	if (of_device_is_compatible(dev->of_node, "marvell,armada-3700-ehci"))  in ehci_orion_drv_reset()
205 	struct orion_ehci_data *pd = dev_get_platdata(&pdev->dev);  in ehci_orion_drv_probe()
216 		return -ENODEV;  in ehci_orion_drv_probe()
218 	pr_debug("Initializing Orion-SoC USB Host Controller\n");  in ehci_orion_drv_probe()
227 	 * Right now device-tree probed devices don't get dma_mask  in ehci_orion_drv_probe()
228 	 * set. Since shared usb code relies on it, set it here for  in ehci_orion_drv_probe()
231 	err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));  in ehci_orion_drv_probe()
242 			&pdev->dev, dev_name(&pdev->dev));  in ehci_orion_drv_probe()
244 		err = -ENOMEM;  in ehci_orion_drv_probe()
248 	hcd->rsrc_start = res->start;  in ehci_orion_drv_probe()
249 	hcd->rsrc_len = resource_size(res);  in ehci_orion_drv_probe()
250 	hcd->regs = regs;  in ehci_orion_drv_probe()
253 	ehci->caps = hcd->regs + 0x100;  in ehci_orion_drv_probe()
254 	hcd->has_tt = 1;  in ehci_orion_drv_probe()
261 	priv->clk = devm_clk_get(&pdev->dev, NULL);  in ehci_orion_drv_probe()
262 	if (!IS_ERR(priv->clk)) {  in ehci_orion_drv_probe()
263 		err = clk_prepare_enable(priv->clk);  in ehci_orion_drv_probe()
268 	priv->phy = devm_phy_optional_get(&pdev->dev, "usb");  in ehci_orion_drv_probe()
269 	if (IS_ERR(priv->phy)) {  in ehci_orion_drv_probe()
270 		err = PTR_ERR(priv->phy);  in ehci_orion_drv_probe()
271 		if (err != -ENOSYS)  in ehci_orion_drv_probe()
276 	 * (Re-)program MBUS remapping windows if we are asked to.  in ehci_orion_drv_probe()
283 	 * setup Orion USB controller.  in ehci_orion_drv_probe()
285 	if (pdev->dev.of_node)  in ehci_orion_drv_probe()
288 		phy_version = pd->phy_version;  in ehci_orion_drv_probe()
291 	case EHCI_PHY_NA:	/* dont change USB phy settings */  in ehci_orion_drv_probe()
299 		dev_warn(&pdev->dev, "USB phy version isn't supported.\n");  in ehci_orion_drv_probe()
306 	device_wakeup_enable(hcd->self.controller);  in ehci_orion_drv_probe()
310 	if (!IS_ERR(priv->clk))  in ehci_orion_drv_probe()
311 		clk_disable_unprepare(priv->clk);  in ehci_orion_drv_probe()
315 	dev_err(&pdev->dev, "init %s fail, %d\n",  in ehci_orion_drv_probe()
316 		dev_name(&pdev->dev), err);  in ehci_orion_drv_probe()
328 	if (!IS_ERR(priv->clk))  in ehci_orion_drv_remove()
329 		clk_disable_unprepare(priv->clk);  in ehci_orion_drv_remove()
335 	{ .compatible = "marvell,orion-ehci", },
336 	{ .compatible = "marvell,armada-3700-ehci", },
346 		.name	= "orion-ehci",
355 		return -ENODEV;  in ehci_orion_init()
369 MODULE_ALIAS("platform:orion-ehci");