1 /*
2 * Copyright (C) 2017 Marek Vasut <marek.vasut@gmail.com>
3 *
4 * Renesas RCar USB HOST xHCI Controller
5 *
6 * SPDX-License-Identifier: GPL-2.0+
7 */
8
9 #include <common.h>
10 #include <clk.h>
11 #include <dm.h>
12 #include <fdtdec.h>
13 #include <usb.h>
14 #include <wait_bit.h>
15
16 #include <usb/xhci.h>
17 #include "xhci-rcar-r8a779x_usb3_v3.h"
18
19 /* Register Offset */
20 #define RCAR_USB3_DL_CTRL 0x250 /* FW Download Control & Status */
21 #define RCAR_USB3_FW_DATA0 0x258 /* FW Data0 */
22
23 /* Register Settings */
24 /* FW Download Control & Status */
25 #define RCAR_USB3_DL_CTRL_ENABLE BIT(0)
26 #define RCAR_USB3_DL_CTRL_FW_SUCCESS BIT(4)
27 #define RCAR_USB3_DL_CTRL_FW_SET_DATA0 BIT(8)
28
29 struct rcar_xhci_platdata {
30 fdt_addr_t hcd_base;
31 struct clk clk;
32 };
33
34 /**
35 * Contains pointers to register base addresses
36 * for the usb controller.
37 */
38 struct rcar_xhci {
39 struct xhci_ctrl ctrl; /* Needs to come first in this struct! */
40 struct usb_platdata usb_plat;
41 struct xhci_hccr *hcd;
42 };
43
xhci_rcar_download_fw(struct rcar_xhci * ctx,const u32 * fw_data,const size_t fw_array_size)44 static int xhci_rcar_download_fw(struct rcar_xhci *ctx, const u32 *fw_data,
45 const size_t fw_array_size)
46 {
47 void __iomem *regs = (void __iomem *)ctx->hcd;
48 int i, ret;
49
50 /* Download R-Car USB3.0 firmware */
51 setbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE);
52
53 for (i = 0; i < fw_array_size; i++) {
54 writel(fw_data[i], regs + RCAR_USB3_FW_DATA0);
55 setbits_le32(regs + RCAR_USB3_DL_CTRL,
56 RCAR_USB3_DL_CTRL_FW_SET_DATA0);
57
58 <<<<<<< HEAD
59 ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL,
60 RCAR_USB3_DL_CTRL_FW_SET_DATA0, false,
61 10, false);
62 =======
63 ret = wait_for_bit("xhci-rcar", regs + RCAR_USB3_DL_CTRL,
64 RCAR_USB3_DL_CTRL_FW_SET_DATA0, false,
65 10, false);
66 >>>>>>> e1cc60c... usb: xhci: Add Renesas R-Car xHCI driver
67 if (ret)
68 break;
69 }
70
71 clrbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE);
72
73 <<<<<<< HEAD
74 ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL,
75 RCAR_USB3_DL_CTRL_FW_SUCCESS, true,
76 10, false);
77 =======
78 ret = wait_for_bit("xhci-rcar", regs + RCAR_USB3_DL_CTRL,
79 RCAR_USB3_DL_CTRL_FW_SUCCESS, true,
80 10, false);
81 >>>>>>> e1cc60c... usb: xhci: Add Renesas R-Car xHCI driver
82
83 return ret;
84 }
85
xhci_rcar_probe(struct udevice * dev)86 static int xhci_rcar_probe(struct udevice *dev)
87 {
88 struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
89 struct rcar_xhci *ctx = dev_get_priv(dev);
90 struct xhci_hcor *hcor;
91 int len, ret;
92
93 ret = clk_get_by_index(dev, 0, &plat->clk);
94 if (ret < 0) {
95 dev_err(dev, "Failed to get USB3 clock\n");
96 return ret;
97 }
98
99 ret = clk_enable(&plat->clk);
100 if (ret) {
101 dev_err(dev, "Failed to enable USB3 clock\n");
102 goto err_clk;
103 }
104
105 ctx->hcd = (struct xhci_hccr *)plat->hcd_base;
106 len = HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase));
107 hcor = (struct xhci_hcor *)((uintptr_t)ctx->hcd + len);
108
109 ret = xhci_rcar_download_fw(ctx, firmware_r8a779x_usb3_v3,
110 ARRAY_SIZE(firmware_r8a779x_usb3_v3));
111 if (ret) {
112 dev_err(dev, "Failed to download firmware\n");
113 goto err_fw;
114 }
115
116 ret = xhci_register(dev, ctx->hcd, hcor);
117 if (ret) {
118 dev_err(dev, "Failed to register xHCI\n");
119 goto err_fw;
120 }
121
122 return 0;
123
124 err_fw:
125 clk_disable(&plat->clk);
126 err_clk:
127 clk_free(&plat->clk);
128 return ret;
129 }
130
xhci_rcar_deregister(struct udevice * dev)131 static int xhci_rcar_deregister(struct udevice *dev)
132 {
133 int ret;
134 struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
135
136 ret = xhci_deregister(dev);
137
138 clk_disable(&plat->clk);
139 clk_free(&plat->clk);
140
141 return ret;
142 }
143
xhci_rcar_ofdata_to_platdata(struct udevice * dev)144 static int xhci_rcar_ofdata_to_platdata(struct udevice *dev)
145 {
146 struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
147
148 plat->hcd_base = devfdt_get_addr(dev);
149 if (plat->hcd_base == FDT_ADDR_T_NONE) {
150 debug("Can't get the XHCI register base address\n");
151 return -ENXIO;
152 }
153
154 return 0;
155 }
156
157 static const struct udevice_id xhci_rcar_ids[] = {
158 { .compatible = "renesas,xhci-r8a7795" },
159 { .compatible = "renesas,xhci-r8a7796" },
160 { .compatible = "renesas,xhci-r8a77965" },
161 { }
162 };
163
164 U_BOOT_DRIVER(usb_xhci) = {
165 .name = "xhci_rcar",
166 .id = UCLASS_USB,
167 .probe = xhci_rcar_probe,
168 .remove = xhci_rcar_deregister,
169 .ops = &xhci_usb_ops,
170 .of_match = xhci_rcar_ids,
171 .ofdata_to_platdata = xhci_rcar_ofdata_to_platdata,
172 .platdata_auto_alloc_size = sizeof(struct rcar_xhci_platdata),
173 .priv_auto_alloc_size = sizeof(struct rcar_xhci),
174 .flags = DM_FLAG_ALLOC_PRIV_DMA,
175 };
176