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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" | |
17 | #include "xhci-rcar.h" | |
18 | ||
19 | #define FIRMWARE_NAME "r8a779x_usb3_v1.dlmem" | |
20 | MODULE_FIRMWARE(FIRMWARE_NAME); | |
21 | ||
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 */ | |
26 | ||
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 */ | |
33 | ||
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) | |
41 | ||
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 | |
46 | ||
47 | /* LCLK Select */ | |
48 | #define RCAR_USB3_LCLK_ENA_VAL 0x01030001 | |
49 | ||
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 | |
54 | ||
55 | /* USB3.0 Polarity */ | |
56 | #define RCAR_USB3_RX_POL_VAL BIT(21) | |
57 | #define RCAR_USB3_TX_POL_VAL BIT(4) | |
58 | ||
59 | void xhci_rcar_start(struct usb_hcd *hcd) | |
60 | { | |
61 | u32 temp; | |
62 | ||
63 | if (hcd->regs != NULL) { | |
64 | /* Interrupt Enable */ | |
65 | temp = readl(hcd->regs + RCAR_USB3_INT_ENA); | |
66 | temp |= RCAR_USB3_INT_ENA_VAL; | |
67 | writel(temp, hcd->regs + RCAR_USB3_INT_ENA); | |
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 | } | |
79 | ||
80 | static int xhci_rcar_download_firmware(struct device *dev, void __iomem *regs) | |
81 | { | |
82 | const struct firmware *fw; | |
83 | int retval, index, j, time; | |
84 | int timeout = 10000; | |
85 | u32 data, val, temp; | |
86 | ||
87 | /* request R-Car USB3.0 firmware */ | |
88 | retval = request_firmware(&fw, FIRMWARE_NAME, dev); | |
89 | if (retval) | |
90 | return retval; | |
91 | ||
92 | /* download R-Car USB3.0 firmware */ | |
93 | temp = readl(regs + RCAR_USB3_DL_CTRL); | |
94 | temp |= RCAR_USB3_DL_CTRL_ENABLE; | |
95 | writel(temp, regs + RCAR_USB3_DL_CTRL); | |
96 | ||
97 | for (index = 0; index < fw->size; index += 4) { | |
98 | /* to avoid reading beyond the end of the buffer */ | |
99 | for (data = 0, j = 3; j >= 0; j--) { | |
100 | if ((j + index) < fw->size) | |
101 | data |= fw->data[index + j] << (8 * j); | |
102 | } | |
103 | writel(data, regs + RCAR_USB3_FW_DATA0); | |
104 | temp = readl(regs + RCAR_USB3_DL_CTRL); | |
105 | temp |= RCAR_USB3_DL_CTRL_FW_SET_DATA0; | |
106 | writel(temp, regs + RCAR_USB3_DL_CTRL); | |
107 | ||
108 | for (time = 0; time < timeout; time++) { | |
109 | val = readl(regs + RCAR_USB3_DL_CTRL); | |
110 | if ((val & RCAR_USB3_DL_CTRL_FW_SET_DATA0) == 0) | |
111 | break; | |
112 | udelay(1); | |
113 | } | |
114 | if (time == timeout) { | |
115 | retval = -ETIMEDOUT; | |
116 | break; | |
117 | } | |
118 | } | |
119 | ||
120 | temp = readl(regs + RCAR_USB3_DL_CTRL); | |
121 | temp &= ~RCAR_USB3_DL_CTRL_ENABLE; | |
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_SUCCESS) { | |
127 | retval = 0; | |
128 | break; | |
129 | } | |
130 | udelay(1); | |
131 | } | |
132 | if (time == timeout) | |
133 | retval = -ETIMEDOUT; | |
134 | ||
135 | release_firmware(fw); | |
136 | ||
137 | return retval; | |
138 | } | |
139 | ||
140 | /* This function needs to initialize a "phy" of usb before */ | |
141 | int xhci_rcar_init_quirk(struct usb_hcd *hcd) | |
142 | { | |
143 | /* If hcd->regs is NULL, we don't just call the following function */ | |
144 | if (!hcd->regs) | |
145 | return 0; | |
146 | ||
147 | return xhci_rcar_download_firmware(hcd->self.controller, hcd->regs); | |
148 | } |