usb/host/xhci-rcar.c

1 // SPDX-License-Identifier: GPL-2.0
3  * xHCI host controller driver for R-Car SoCs
13 #include <linux/usb/phy.h>
16 #include "xhci-plat.h"
17 #include "xhci-rzv2m.h"
23 * - The V3 firmware is for all R-Car Gen3
24 * - The V2 firmware is possible to use on R-Car Gen2. However, the V2 causes
25 *   performance degradation. So, this driver continues to use the V1 if R-Car
26 *   Gen2.
27 * - The V1 firmware is impossible to use on R-Car Gen3.
79 	writel(RCAR_USB3_LCLK_ENA_VAL, hcd->regs + RCAR_USB3_LCLK);  in xhci_rcar_start_gen2()
81 	writel(RCAR_USB3_CONF1_VAL, hcd->regs + RCAR_USB3_CONF1);  in xhci_rcar_start_gen2()
82 	writel(RCAR_USB3_CONF2_VAL, hcd->regs + RCAR_USB3_CONF2);  in xhci_rcar_start_gen2()
83 	writel(RCAR_USB3_CONF3_VAL, hcd->regs + RCAR_USB3_CONF3);  in xhci_rcar_start_gen2()
85 	writel(RCAR_USB3_RX_POL_VAL, hcd->regs + RCAR_USB3_RX_POL);  in xhci_rcar_start_gen2()
86 	writel(RCAR_USB3_TX_POL_VAL, hcd->regs + RCAR_USB3_TX_POL);  in xhci_rcar_start_gen2()
91 	struct device_node *node = dev->of_node;  in xhci_rcar_is_gen2()
93 	return of_device_is_compatible(node, "renesas,xhci-r8a7790") ||  in xhci_rcar_is_gen2()
94 		of_device_is_compatible(node, "renesas,xhci-r8a7791") ||  in xhci_rcar_is_gen2()
95 		of_device_is_compatible(node, "renesas,xhci-r8a7793") ||  in xhci_rcar_is_gen2()
96 		of_device_is_compatible(node, "renesas,rcar-gen2-xhci");  in xhci_rcar_is_gen2()
103 	if (hcd->regs != NULL) {  in xhci_rcar_start()
105 		temp = readl(hcd->regs + RCAR_USB3_INT_ENA);  in xhci_rcar_start()
107 		writel(temp, hcd->regs + RCAR_USB3_INT_ENA);  in xhci_rcar_start()
108 		if (xhci_rcar_is_gen2(hcd->self.controller))  in xhci_rcar_start()
115 	struct device *dev = hcd->self.controller;  in xhci_rcar_download_firmware()
116 	void __iomem *regs = hcd->regs;  in xhci_rcar_download_firmware()
129 	/* request R-Car USB3.0 firmware */  in xhci_rcar_download_firmware()
130 	retval = request_firmware(&fw, priv->firmware_name, dev);  in xhci_rcar_download_firmware()
134 	/* download R-Car USB3.0 firmware */  in xhci_rcar_download_firmware()
139 	for (index = 0; index < fw->size; index += 4) {  in xhci_rcar_download_firmware()
141 		for (data = 0, j = 3; j >= 0; j--) {  in xhci_rcar_download_firmware()
142 			if ((j + index) < fw->size)  in xhci_rcar_download_firmware()
143 				data |= fw->data[index + j] << (8 * j);  in xhci_rcar_download_firmware()
174 	retval = readl_poll_timeout_atomic(hcd->regs + RCAR_USB3_AXH_STA,  in xhci_rcar_wait_for_pll_active()
179 /* This function needs to initialize a "phy" of usb before */
182 	/* If hcd->regs is NULL, we don't just call the following function */  in xhci_rcar_init_quirk()
183 	if (!hcd->regs)  in xhci_rcar_init_quirk()
187 		return -ETIMEDOUT;  in xhci_rcar_init_quirk()
204  * On R-Car Gen2 and Gen3, the AC64 bit (bit 0) of HCCPARAMS1 is set
205  * to 1. However, these SoCs don't support 64-bit address memory
206  * pointers. So, this driver clears the AC64 bit of xhci->hcc_params
238 		.compatible = "renesas,xhci-r8a7790",
241 		.compatible = "renesas,xhci-r8a7791",
244 		.compatible = "renesas,xhci-r8a7793",
247 		.compatible = "renesas,xhci-r8a7795",
250 		.compatible = "renesas,xhci-r8a7796",
253 		.compatible = "renesas,rcar-gen2-xhci",
256 		.compatible = "renesas,rcar-gen3-xhci",
259 		.compatible = "renesas,rzv2m-xhci",
270 	priv_match = of_device_get_match_data(&pdev->dev);  in xhci_renesas_probe()
280 		.name = "xhci-renesas-hcd",
287 MODULE_DESCRIPTION("xHCI Platform Host Controller Driver for Renesas R-Car and RZ");