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4ac8918f YS |
1 | /* |
2 | * xHCI host controller driver for R-Car SoCs | |
3 | * | |
4 | * Copyright (C) 2014 Renesas Electronics Corporation | |
5 | * | |
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. | |
9 | */ | |
10 | ||
11 | #include <linux/firmware.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/platform_device.h> | |
14 | #include <linux/usb/phy.h> | |
15 | ||
16 | #include "xhci.h" | |
9bf9d9d6 | 17 | #include "xhci-plat.h" |
4ac8918f YS |
18 | #include "xhci-rcar.h" |
19 | ||
526a240f YS |
20 | /* |
21 | * - The V2 firmware is possible to use on R-Car Gen2. However, the V2 causes | |
22 | * performance degradation. So, this driver continues to use the V1 if R-Car | |
23 | * Gen2. | |
24 | * - The V1 firmware is impossible to use on R-Car Gen3. | |
25 | */ | |
9bf9d9d6 | 26 | MODULE_FIRMWARE(XHCI_RCAR_FIRMWARE_NAME_V1); |
526a240f | 27 | MODULE_FIRMWARE(XHCI_RCAR_FIRMWARE_NAME_V2); |
4ac8918f YS |
28 | |
29 | /*** Register Offset ***/ | |
30 | #define RCAR_USB3_INT_ENA 0x224 /* Interrupt Enable */ | |
31 | #define RCAR_USB3_DL_CTRL 0x250 /* FW Download Control & Status */ | |
32 | #define RCAR_USB3_FW_DATA0 0x258 /* FW Data0 */ | |
33 | ||
34 | #define RCAR_USB3_LCLK 0xa44 /* LCLK Select */ | |
35 | #define RCAR_USB3_CONF1 0xa48 /* USB3.0 Configuration1 */ | |
36 | #define RCAR_USB3_CONF2 0xa5c /* USB3.0 Configuration2 */ | |
37 | #define RCAR_USB3_CONF3 0xaa8 /* USB3.0 Configuration3 */ | |
38 | #define RCAR_USB3_RX_POL 0xab0 /* USB3.0 RX Polarity */ | |
39 | #define RCAR_USB3_TX_POL 0xab8 /* USB3.0 TX Polarity */ | |
40 | ||
41 | /*** Register Settings ***/ | |
42 | /* Interrupt Enable */ | |
43 | #define RCAR_USB3_INT_XHC_ENA 0x00000001 | |
44 | #define RCAR_USB3_INT_PME_ENA 0x00000002 | |
45 | #define RCAR_USB3_INT_HSE_ENA 0x00000004 | |
46 | #define RCAR_USB3_INT_ENA_VAL (RCAR_USB3_INT_XHC_ENA | \ | |
47 | RCAR_USB3_INT_PME_ENA | RCAR_USB3_INT_HSE_ENA) | |
48 | ||
49 | /* FW Download Control & Status */ | |
50 | #define RCAR_USB3_DL_CTRL_ENABLE 0x00000001 | |
51 | #define RCAR_USB3_DL_CTRL_FW_SUCCESS 0x00000010 | |
52 | #define RCAR_USB3_DL_CTRL_FW_SET_DATA0 0x00000100 | |
53 | ||
54 | /* LCLK Select */ | |
55 | #define RCAR_USB3_LCLK_ENA_VAL 0x01030001 | |
56 | ||
57 | /* USB3.0 Configuration */ | |
58 | #define RCAR_USB3_CONF1_VAL 0x00030204 | |
59 | #define RCAR_USB3_CONF2_VAL 0x00030300 | |
60 | #define RCAR_USB3_CONF3_VAL 0x13802007 | |
61 | ||
62 | /* USB3.0 Polarity */ | |
63 | #define RCAR_USB3_RX_POL_VAL BIT(21) | |
64 | #define RCAR_USB3_TX_POL_VAL BIT(4) | |
65 | ||
9bf9d9d6 YS |
66 | static void xhci_rcar_start_gen2(struct usb_hcd *hcd) |
67 | { | |
68 | /* LCLK Select */ | |
69 | writel(RCAR_USB3_LCLK_ENA_VAL, hcd->regs + RCAR_USB3_LCLK); | |
70 | /* USB3.0 Configuration */ | |
71 | writel(RCAR_USB3_CONF1_VAL, hcd->regs + RCAR_USB3_CONF1); | |
72 | writel(RCAR_USB3_CONF2_VAL, hcd->regs + RCAR_USB3_CONF2); | |
73 | writel(RCAR_USB3_CONF3_VAL, hcd->regs + RCAR_USB3_CONF3); | |
74 | /* USB3.0 Polarity */ | |
75 | writel(RCAR_USB3_RX_POL_VAL, hcd->regs + RCAR_USB3_RX_POL); | |
76 | writel(RCAR_USB3_TX_POL_VAL, hcd->regs + RCAR_USB3_TX_POL); | |
77 | } | |
78 | ||
4ac8918f YS |
79 | void xhci_rcar_start(struct usb_hcd *hcd) |
80 | { | |
81 | u32 temp; | |
82 | ||
83 | if (hcd->regs != NULL) { | |
84 | /* Interrupt Enable */ | |
85 | temp = readl(hcd->regs + RCAR_USB3_INT_ENA); | |
86 | temp |= RCAR_USB3_INT_ENA_VAL; | |
87 | writel(temp, hcd->regs + RCAR_USB3_INT_ENA); | |
9bf9d9d6 YS |
88 | if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2)) |
89 | xhci_rcar_start_gen2(hcd); | |
4ac8918f YS |
90 | } |
91 | } | |
92 | ||
9bf9d9d6 | 93 | static int xhci_rcar_download_firmware(struct usb_hcd *hcd) |
4ac8918f | 94 | { |
9bf9d9d6 YS |
95 | struct device *dev = hcd->self.controller; |
96 | void __iomem *regs = hcd->regs; | |
97 | struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); | |
4ac8918f YS |
98 | const struct firmware *fw; |
99 | int retval, index, j, time; | |
100 | int timeout = 10000; | |
101 | u32 data, val, temp; | |
102 | ||
103 | /* request R-Car USB3.0 firmware */ | |
9bf9d9d6 | 104 | retval = request_firmware(&fw, priv->firmware_name, dev); |
4ac8918f YS |
105 | if (retval) |
106 | return retval; | |
107 | ||
108 | /* download R-Car USB3.0 firmware */ | |
109 | temp = readl(regs + RCAR_USB3_DL_CTRL); | |
110 | temp |= RCAR_USB3_DL_CTRL_ENABLE; | |
111 | writel(temp, regs + RCAR_USB3_DL_CTRL); | |
112 | ||
113 | for (index = 0; index < fw->size; index += 4) { | |
114 | /* to avoid reading beyond the end of the buffer */ | |
115 | for (data = 0, j = 3; j >= 0; j--) { | |
116 | if ((j + index) < fw->size) | |
117 | data |= fw->data[index + j] << (8 * j); | |
118 | } | |
119 | writel(data, regs + RCAR_USB3_FW_DATA0); | |
120 | temp = readl(regs + RCAR_USB3_DL_CTRL); | |
121 | temp |= RCAR_USB3_DL_CTRL_FW_SET_DATA0; | |
122 | writel(temp, regs + RCAR_USB3_DL_CTRL); | |
123 | ||
124 | for (time = 0; time < timeout; time++) { | |
125 | val = readl(regs + RCAR_USB3_DL_CTRL); | |
126 | if ((val & RCAR_USB3_DL_CTRL_FW_SET_DATA0) == 0) | |
127 | break; | |
128 | udelay(1); | |
129 | } | |
130 | if (time == timeout) { | |
131 | retval = -ETIMEDOUT; | |
132 | break; | |
133 | } | |
134 | } | |
135 | ||
136 | temp = readl(regs + RCAR_USB3_DL_CTRL); | |
137 | temp &= ~RCAR_USB3_DL_CTRL_ENABLE; | |
138 | writel(temp, regs + RCAR_USB3_DL_CTRL); | |
139 | ||
140 | for (time = 0; time < timeout; time++) { | |
141 | val = readl(regs + RCAR_USB3_DL_CTRL); | |
142 | if (val & RCAR_USB3_DL_CTRL_FW_SUCCESS) { | |
143 | retval = 0; | |
144 | break; | |
145 | } | |
146 | udelay(1); | |
147 | } | |
148 | if (time == timeout) | |
149 | retval = -ETIMEDOUT; | |
150 | ||
151 | release_firmware(fw); | |
152 | ||
153 | return retval; | |
154 | } | |
155 | ||
156 | /* This function needs to initialize a "phy" of usb before */ | |
157 | int xhci_rcar_init_quirk(struct usb_hcd *hcd) | |
158 | { | |
159 | /* If hcd->regs is NULL, we don't just call the following function */ | |
160 | if (!hcd->regs) | |
161 | return 0; | |
162 | ||
9bf9d9d6 | 163 | return xhci_rcar_download_firmware(hcd); |
4ac8918f | 164 | } |