2 * xHCI host controller driver for R-Car SoCs
4 * Copyright (C) 2014 Renesas Electronics Corporation
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
11 #include <linux/firmware.h>
12 #include <linux/module.h>
13 #include <linux/platform_device.h>
14 #include <linux/usb/phy.h>
17 #include "xhci-plat.h"
18 #include "xhci-rcar.h"
20 MODULE_FIRMWARE(XHCI_RCAR_FIRMWARE_NAME_V1);
22 /*** Register Offset ***/
23 #define RCAR_USB3_INT_ENA 0x224 /* Interrupt Enable */
24 #define RCAR_USB3_DL_CTRL 0x250 /* FW Download Control & Status */
25 #define RCAR_USB3_FW_DATA0 0x258 /* FW Data0 */
27 #define RCAR_USB3_LCLK 0xa44 /* LCLK Select */
28 #define RCAR_USB3_CONF1 0xa48 /* USB3.0 Configuration1 */
29 #define RCAR_USB3_CONF2 0xa5c /* USB3.0 Configuration2 */
30 #define RCAR_USB3_CONF3 0xaa8 /* USB3.0 Configuration3 */
31 #define RCAR_USB3_RX_POL 0xab0 /* USB3.0 RX Polarity */
32 #define RCAR_USB3_TX_POL 0xab8 /* USB3.0 TX Polarity */
34 /*** Register Settings ***/
35 /* Interrupt Enable */
36 #define RCAR_USB3_INT_XHC_ENA 0x00000001
37 #define RCAR_USB3_INT_PME_ENA 0x00000002
38 #define RCAR_USB3_INT_HSE_ENA 0x00000004
39 #define RCAR_USB3_INT_ENA_VAL (RCAR_USB3_INT_XHC_ENA | \
40 RCAR_USB3_INT_PME_ENA | RCAR_USB3_INT_HSE_ENA)
42 /* FW Download Control & Status */
43 #define RCAR_USB3_DL_CTRL_ENABLE 0x00000001
44 #define RCAR_USB3_DL_CTRL_FW_SUCCESS 0x00000010
45 #define RCAR_USB3_DL_CTRL_FW_SET_DATA0 0x00000100
48 #define RCAR_USB3_LCLK_ENA_VAL 0x01030001
50 /* USB3.0 Configuration */
51 #define RCAR_USB3_CONF1_VAL 0x00030204
52 #define RCAR_USB3_CONF2_VAL 0x00030300
53 #define RCAR_USB3_CONF3_VAL 0x13802007
56 #define RCAR_USB3_RX_POL_VAL BIT(21)
57 #define RCAR_USB3_TX_POL_VAL BIT(4)
59 static void xhci_rcar_start_gen2(struct usb_hcd *hcd)
62 writel(RCAR_USB3_LCLK_ENA_VAL, hcd->regs + RCAR_USB3_LCLK);
63 /* USB3.0 Configuration */
64 writel(RCAR_USB3_CONF1_VAL, hcd->regs + RCAR_USB3_CONF1);
65 writel(RCAR_USB3_CONF2_VAL, hcd->regs + RCAR_USB3_CONF2);
66 writel(RCAR_USB3_CONF3_VAL, hcd->regs + RCAR_USB3_CONF3);
68 writel(RCAR_USB3_RX_POL_VAL, hcd->regs + RCAR_USB3_RX_POL);
69 writel(RCAR_USB3_TX_POL_VAL, hcd->regs + RCAR_USB3_TX_POL);
72 void xhci_rcar_start(struct usb_hcd *hcd)
76 if (hcd->regs != NULL) {
77 /* Interrupt Enable */
78 temp = readl(hcd->regs + RCAR_USB3_INT_ENA);
79 temp |= RCAR_USB3_INT_ENA_VAL;
80 writel(temp, hcd->regs + RCAR_USB3_INT_ENA);
81 if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2))
82 xhci_rcar_start_gen2(hcd);
86 static int xhci_rcar_download_firmware(struct usb_hcd *hcd)
88 struct device *dev = hcd->self.controller;
89 void __iomem *regs = hcd->regs;
90 struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
91 const struct firmware *fw;
92 int retval, index, j, time;
96 /* request R-Car USB3.0 firmware */
97 retval = request_firmware(&fw, priv->firmware_name, dev);
101 /* download R-Car USB3.0 firmware */
102 temp = readl(regs + RCAR_USB3_DL_CTRL);
103 temp |= RCAR_USB3_DL_CTRL_ENABLE;
104 writel(temp, regs + RCAR_USB3_DL_CTRL);
106 for (index = 0; index < fw->size; index += 4) {
107 /* to avoid reading beyond the end of the buffer */
108 for (data = 0, j = 3; j >= 0; j--) {
109 if ((j + index) < fw->size)
110 data |= fw->data[index + j] << (8 * j);
112 writel(data, regs + RCAR_USB3_FW_DATA0);
113 temp = readl(regs + RCAR_USB3_DL_CTRL);
114 temp |= RCAR_USB3_DL_CTRL_FW_SET_DATA0;
115 writel(temp, regs + RCAR_USB3_DL_CTRL);
117 for (time = 0; time < timeout; time++) {
118 val = readl(regs + RCAR_USB3_DL_CTRL);
119 if ((val & RCAR_USB3_DL_CTRL_FW_SET_DATA0) == 0)
123 if (time == timeout) {
129 temp = readl(regs + RCAR_USB3_DL_CTRL);
130 temp &= ~RCAR_USB3_DL_CTRL_ENABLE;
131 writel(temp, regs + RCAR_USB3_DL_CTRL);
133 for (time = 0; time < timeout; time++) {
134 val = readl(regs + RCAR_USB3_DL_CTRL);
135 if (val & RCAR_USB3_DL_CTRL_FW_SUCCESS) {
144 release_firmware(fw);
149 /* This function needs to initialize a "phy" of usb before */
150 int xhci_rcar_init_quirk(struct usb_hcd *hcd)
152 /* If hcd->regs is NULL, we don't just call the following function */
156 return xhci_rcar_download_firmware(hcd);