Commit | Line | Data |
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de18757e YS |
1 | /* |
2 | * Renesas USB driver R-Car Gen. 3 initialization and power control | |
3 | * | |
4 | * Copyright (C) 2016 Renesas Electronics Corporation | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | */ | |
11 | ||
b7603239 | 12 | #include <linux/delay.h> |
de18757e YS |
13 | #include <linux/io.h> |
14 | #include "common.h" | |
15 | #include "rcar3.h" | |
16 | ||
17 | #define LPSTS 0x102 | |
18 | #define UGCTRL2 0x184 /* 32-bit register */ | |
19 | ||
20 | /* Low Power Status register (LPSTS) */ | |
21 | #define LPSTS_SUSPM 0x4000 | |
22 | ||
23 | /* USB General control register 2 (UGCTRL2), bit[31:6] should be 0 */ | |
24 | #define UGCTRL2_RESERVED_3 0x00000001 /* bit[3:0] should be B'0001 */ | |
25 | #define UGCTRL2_USB0SEL_OTG 0x00000030 | |
26 | ||
107a4b53 | 27 | static void usbhs_write32(struct usbhs_priv *priv, u32 reg, u32 data) |
de18757e YS |
28 | { |
29 | iowrite32(data, priv->base + reg); | |
30 | } | |
31 | ||
32 | static int usbhs_rcar3_power_ctrl(struct platform_device *pdev, | |
33 | void __iomem *base, int enable) | |
34 | { | |
35 | struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); | |
36 | ||
37 | usbhs_write32(priv, UGCTRL2, UGCTRL2_RESERVED_3 | UGCTRL2_USB0SEL_OTG); | |
38 | ||
b7603239 | 39 | if (enable) { |
de18757e | 40 | usbhs_bset(priv, LPSTS, LPSTS_SUSPM, LPSTS_SUSPM); |
b7603239 YS |
41 | /* The controller on R-Car Gen3 needs to wait up to 45 usec */ |
42 | udelay(45); | |
43 | } else { | |
de18757e | 44 | usbhs_bset(priv, LPSTS, LPSTS_SUSPM, 0); |
b7603239 | 45 | } |
de18757e YS |
46 | |
47 | return 0; | |
48 | } | |
49 | ||
50 | static int usbhs_rcar3_get_id(struct platform_device *pdev) | |
51 | { | |
52 | return USBHS_GADGET; | |
53 | } | |
54 | ||
55 | const struct renesas_usbhs_platform_callback usbhs_rcar3_ops = { | |
56 | .power_ctrl = usbhs_rcar3_power_ctrl, | |
57 | .get_id = usbhs_rcar3_get_id, | |
58 | }; |