1 // SPDX-License-Identifier: GPL-2.0
3  * xHCI host controller driver for R-Car SoCs
16 #include "xhci.h"
17 #include "xhci-plat.h"
18 #include "xhci-rcar.h"
21 * - The V3 firmware is for almost all R-Car Gen3 (except r8a7795 ES1.x)
22 * - The V2 firmware is for r8a7795 ES1.x.
23 * - The V2 firmware is possible to use on R-Car Gen2. However, the V2 causes
24 *   performance degradation. So, this driver continues to use the V1 if R-Car
26 * - The V1 firmware is impossible to use on R-Car Gen3.
82 		.soc_id = "r8a7795", .revision = "ES1.*",
91 	writel(RCAR_USB3_LCLK_ENA_VAL, hcd->regs + RCAR_USB3_LCLK);  in xhci_rcar_start_gen2()
93 	writel(RCAR_USB3_CONF1_VAL, hcd->regs + RCAR_USB3_CONF1);  in xhci_rcar_start_gen2()
94 	writel(RCAR_USB3_CONF2_VAL, hcd->regs + RCAR_USB3_CONF2);  in xhci_rcar_start_gen2()
95 	writel(RCAR_USB3_CONF3_VAL, hcd->regs + RCAR_USB3_CONF3);  in xhci_rcar_start_gen2()
97 	writel(RCAR_USB3_RX_POL_VAL, hcd->regs + RCAR_USB3_RX_POL);  in xhci_rcar_start_gen2()
98 	writel(RCAR_USB3_TX_POL_VAL, hcd->regs + RCAR_USB3_TX_POL);  in xhci_rcar_start_gen2()
103 	struct device_node *node = dev->of_node;  in xhci_rcar_is_gen2()
105 	return of_device_is_compatible(node, "renesas,xhci-r8a7790") ||  in xhci_rcar_is_gen2()
106 		of_device_is_compatible(node, "renesas,xhci-r8a7791") ||  in xhci_rcar_is_gen2()
107 		of_device_is_compatible(node, "renesas,xhci-r8a7793") ||  in xhci_rcar_is_gen2()
108 		of_device_is_compatible(node, "renesas,rcar-gen2-xhci");  in xhci_rcar_is_gen2()
115 	if (hcd->regs != NULL) {  in xhci_rcar_start()
117 		temp = readl(hcd->regs + RCAR_USB3_INT_ENA);  in xhci_rcar_start()
119 		writel(temp, hcd->regs + RCAR_USB3_INT_ENA);  in xhci_rcar_start()
120 		if (xhci_rcar_is_gen2(hcd->self.controller))  in xhci_rcar_start()
127 	struct device *dev = hcd->self.controller;  in xhci_rcar_download_firmware()
128 	void __iomem *regs = hcd->regs;  in xhci_rcar_download_firmware()
139 		quirks = (uintptr_t)attr->data;  in xhci_rcar_download_firmware()
146 		firmware_name = priv->firmware_name;  in xhci_rcar_download_firmware()
148 	/* request R-Car USB3.0 firmware */  in xhci_rcar_download_firmware()
153 	/* download R-Car USB3.0 firmware */  in xhci_rcar_download_firmware()
158 	for (index = 0; index < fw->size; index += 4) {  in xhci_rcar_download_firmware()
160 		for (data = 0, j = 3; j >= 0; j--) {  in xhci_rcar_download_firmware()
161 			if ((j + index) < fw->size)  in xhci_rcar_download_firmware()
162 				data |= fw->data[index + j] << (8 * j);  in xhci_rcar_download_firmware()
193 	retval = readl_poll_timeout_atomic(hcd->regs + RCAR_USB3_AXH_STA,  in xhci_rcar_wait_for_pll_active()
201 	/* If hcd->regs is NULL, we don't just call the following function */  in xhci_rcar_init_quirk()
202 	if (!hcd->regs)  in xhci_rcar_init_quirk()
206 		return -ETIMEDOUT;  in xhci_rcar_init_quirk()