1 // SPDX-License-Identifier: GPL-2.0
3  * xHCI host controller driver for R-Car SoCs
16 #include "xhci-plat.h"
17 #include "xhci-rcar.h"
20 * - The V3 firmware is for almost all R-Car Gen3 (except r8a7795 ES1.x)
21 * - The V2 firmware is for r8a7795 ES1.x.
22 * - The V2 firmware is possible to use on R-Car Gen2. However, the V2 causes
23 *   performance degradation. So, this driver continues to use the V1 if R-Car
25 * - The V1 firmware is impossible to use on R-Car Gen3.
38 #define RCAR_USB3_CONF1		0xa48	/* USB3.0 Configuration1 */
39 #define RCAR_USB3_CONF2		0xa5c	/* USB3.0 Configuration2 */
40 #define RCAR_USB3_CONF3		0xaa8	/* USB3.0 Configuration3 */
41 #define RCAR_USB3_RX_POL	0xab0	/* USB3.0 RX Polarity */
42 #define RCAR_USB3_TX_POL	0xab8	/* USB3.0 TX Polarity */
66 /* USB3.0 Configuration */
71 /* USB3.0 Polarity */
90 	writel(RCAR_USB3_LCLK_ENA_VAL, hcd->regs + RCAR_USB3_LCLK);  in xhci_rcar_start_gen2()
91 	/* USB3.0 Configuration */  in xhci_rcar_start_gen2()
92 	writel(RCAR_USB3_CONF1_VAL, hcd->regs + RCAR_USB3_CONF1);  in xhci_rcar_start_gen2()
93 	writel(RCAR_USB3_CONF2_VAL, hcd->regs + RCAR_USB3_CONF2);  in xhci_rcar_start_gen2()
94 	writel(RCAR_USB3_CONF3_VAL, hcd->regs + RCAR_USB3_CONF3);  in xhci_rcar_start_gen2()
95 	/* USB3.0 Polarity */  in xhci_rcar_start_gen2()
96 	writel(RCAR_USB3_RX_POL_VAL, hcd->regs + RCAR_USB3_RX_POL);  in xhci_rcar_start_gen2()
97 	writel(RCAR_USB3_TX_POL_VAL, hcd->regs + RCAR_USB3_TX_POL);  in xhci_rcar_start_gen2()
102 	struct device_node *node = dev->of_node;  in xhci_rcar_is_gen2()
104 	return of_device_is_compatible(node, "renesas,xhci-r8a7790") ||  in xhci_rcar_is_gen2()
105 		of_device_is_compatible(node, "renesas,xhci-r8a7791") ||  in xhci_rcar_is_gen2()
106 		of_device_is_compatible(node, "renesas,xhci-r8a7793") ||  in xhci_rcar_is_gen2()
107 		of_device_is_compatible(node, "renesas,rcar-gen2-xhci");  in xhci_rcar_is_gen2()
112 	struct device_node *node = dev->of_node;  in xhci_rcar_is_gen3()
114 	return of_device_is_compatible(node, "renesas,xhci-r8a7795") ||  in xhci_rcar_is_gen3()
115 		of_device_is_compatible(node, "renesas,xhci-r8a7796") ||  in xhci_rcar_is_gen3()
116 		of_device_is_compatible(node, "renesas,rcar-gen3-xhci");  in xhci_rcar_is_gen3()
123 	if (hcd->regs != NULL) {  in xhci_rcar_start()
125 		temp = readl(hcd->regs + RCAR_USB3_INT_ENA);  in xhci_rcar_start()
127 		writel(temp, hcd->regs + RCAR_USB3_INT_ENA);  in xhci_rcar_start()
128 		if (xhci_rcar_is_gen2(hcd->self.controller))  in xhci_rcar_start()
135 	struct device *dev = hcd->self.controller;  in xhci_rcar_download_firmware()
136 	void __iomem *regs = hcd->regs;  in xhci_rcar_download_firmware()
147 	if (attr)  in xhci_rcar_download_firmware()
148 		quirks = (uintptr_t)attr->data;  in xhci_rcar_download_firmware()
150 	if (quirks & RCAR_XHCI_FIRMWARE_V2)  in xhci_rcar_download_firmware()
152 	else if (quirks & RCAR_XHCI_FIRMWARE_V3)  in xhci_rcar_download_firmware()
155 		firmware_name = priv->firmware_name;  in xhci_rcar_download_firmware()
157 	/* request R-Car USB3.0 firmware */  in xhci_rcar_download_firmware()
159 	if (retval)  in xhci_rcar_download_firmware()
162 	/* download R-Car USB3.0 firmware */  in xhci_rcar_download_firmware()
167 	for (index = 0; index < fw->size; index += 4) {  in xhci_rcar_download_firmware()
169 		for (data = 0, j = 3; j >= 0; j--) {  in xhci_rcar_download_firmware()
170 			if ((j + index) < fw->size)  in xhci_rcar_download_firmware()
171 				data |= fw->data[index + j] << (8 * j);  in xhci_rcar_download_firmware()
180 			if ((val & RCAR_USB3_DL_CTRL_FW_SET_DATA0) == 0)  in xhci_rcar_download_firmware()
184 		if (time == timeout) {  in xhci_rcar_download_firmware()
185 			retval = -ETIMEDOUT;  in xhci_rcar_download_firmware()
196 		if (val & RCAR_USB3_DL_CTRL_FW_SUCCESS) {  in xhci_rcar_download_firmware()
202 	if (time == timeout)  in xhci_rcar_download_firmware()
203 		retval = -ETIMEDOUT;  in xhci_rcar_download_firmware()
216 		val = readl(hcd->regs + RCAR_USB3_AXH_STA);  in xhci_rcar_wait_for_pll_active()
217 		if ((val & mask) == mask)  in xhci_rcar_wait_for_pll_active()
220 		timeout--;  in xhci_rcar_wait_for_pll_active()
231 	/* If hcd->regs is NULL, we don't just call the following function */  in xhci_rcar_init_quirk()
232 	if (!hcd->regs)  in xhci_rcar_init_quirk()
236 	 * On R-Car Gen2 and Gen3, the AC64 bit (bit 0) of HCCPARAMS1 is set  in xhci_rcar_init_quirk()
237 	 * to 1. However, these SoCs don't support 64-bit address memory  in xhci_rcar_init_quirk()
238 	 * pointers. So, this driver clears the AC64 bit of xhci->hcc_params  in xhci_rcar_init_quirk()
246 	if (xhci_rcar_is_gen2(hcd->self.controller) ||  in xhci_rcar_init_quirk()
247 			xhci_rcar_is_gen3(hcd->self.controller)) {  in xhci_rcar_init_quirk()
248 		xhci->quirks |= XHCI_NO_64BIT_SUPPORT | XHCI_SLOW_SUSPEND;  in xhci_rcar_init_quirk()
251 	if (!xhci_rcar_wait_for_pll_active(hcd))  in xhci_rcar_init_quirk()
252 		return -ETIMEDOUT;  in xhci_rcar_init_quirk()
254 	xhci->quirks |= XHCI_TRUST_TX_LENGTH;  in xhci_rcar_init_quirk()
263 	if (!ret)  in xhci_rcar_resume_quirk()