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1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
2 | /* | |
3 | * Copyright 2019 Google LLC | |
4 | * Written by Simon Glass <sjg@chromium.org> | |
5 | */ | |
6 | ||
7 | #ifndef __p2sb_h | |
8 | #define __p2sb_h | |
9 | ||
10 | /* Port Id lives in bits 23:16 and register offset lives in 15:0 of address */ | |
11 | #define PCR_PORTID_SHIFT 16 | |
12 | ||
13 | /** | |
14 | * struct p2sb_child_platdata - Information about each child of a p2sb device | |
15 | * | |
16 | * @pid: Port ID for this child | |
17 | */ | |
18 | struct p2sb_child_platdata { | |
19 | uint pid; | |
20 | }; | |
21 | ||
22 | /** | |
23 | * struct p2sb_uc_priv - information for the uclass about each device | |
24 | * | |
25 | * This must be set up by the driver when it is probed | |
26 | * | |
27 | * @mmio_base: Base address of P2SB region | |
28 | */ | |
29 | struct p2sb_uc_priv { | |
30 | uint mmio_base; | |
31 | }; | |
32 | ||
33 | /** | |
34 | * struct p2sb_ops - Operations for the P2SB (none at present) | |
35 | */ | |
36 | struct p2sb_ops { | |
37 | }; | |
38 | ||
39 | #define p2sb_get_ops(dev) ((struct p2sb_ops *)(dev)->driver->ops) | |
40 | ||
41 | /** | |
42 | * pcr_read32/16/8() - Read from a PCR device | |
43 | * | |
44 | * Reads data from a PCR device within the P2SB | |
45 | * | |
46 | * @dev: Device to read from | |
47 | * @offset: Offset within device to read | |
48 | * @return value read | |
49 | */ | |
50 | uint pcr_read32(struct udevice *dev, uint offset); | |
51 | uint pcr_read16(struct udevice *dev, uint offset); | |
52 | uint pcr_read8(struct udevice *dev, uint offset); | |
53 | ||
54 | /** | |
55 | * pcr_read32/16/8() - Write to a PCR device | |
56 | * | |
57 | * Writes data to a PCR device within the P2SB | |
58 | * | |
59 | * @dev: Device to write to | |
60 | * @offset: Offset within device to write | |
61 | * @data: Data to write | |
62 | */ | |
63 | void pcr_write32(struct udevice *dev, uint offset, uint data); | |
64 | void pcr_write16(struct udevice *dev, uint offset, uint data); | |
65 | void pcr_write8(struct udevice *dev, uint offset, uint data); | |
66 | ||
67 | /** | |
68 | * pcr_clrsetbits32/16/8() - Update a PCR device | |
69 | * | |
70 | * Updates dat in a PCR device within the P2SB | |
71 | * | |
72 | * This reads from the device, clears and set bits, then writes back. | |
73 | * | |
74 | * new_data = (old_data & ~clr) | set | |
75 | * | |
76 | * @dev: Device to update | |
77 | * @offset: Offset within device to update | |
78 | * @clr: Bits to clear after reading | |
79 | * @set: Bits to set before writing | |
80 | */ | |
81 | void pcr_clrsetbits32(struct udevice *dev, uint offset, uint clr, uint set); | |
82 | void pcr_clrsetbits16(struct udevice *dev, uint offset, uint clr, uint set); | |
83 | void pcr_clrsetbits8(struct udevice *dev, uint offset, uint clr, uint set); | |
84 | ||
85 | static inline void pcr_setbits32(struct udevice *dev, uint offset, uint set) | |
86 | { | |
87 | return pcr_clrsetbits32(dev, offset, 0, set); | |
88 | } | |
89 | ||
90 | static inline void pcr_setbits16(struct udevice *dev, uint offset, uint set) | |
91 | { | |
92 | return pcr_clrsetbits16(dev, offset, 0, set); | |
93 | } | |
94 | ||
95 | static inline void pcr_setbits8(struct udevice *dev, uint offset, uint set) | |
96 | { | |
97 | return pcr_clrsetbits8(dev, offset, 0, set); | |
98 | } | |
99 | ||
100 | static inline void pcr_clrbits32(struct udevice *dev, uint offset, uint clr) | |
101 | { | |
102 | return pcr_clrsetbits32(dev, offset, clr, 0); | |
103 | } | |
104 | ||
105 | static inline void pcr_clrbits16(struct udevice *dev, uint offset, uint clr) | |
106 | { | |
107 | return pcr_clrsetbits16(dev, offset, clr, 0); | |
108 | } | |
109 | ||
110 | static inline void pcr_clrbits8(struct udevice *dev, uint offset, uint clr) | |
111 | { | |
112 | return pcr_clrsetbits8(dev, offset, clr, 0); | |
113 | } | |
114 | ||
115 | /** | |
116 | * p2sb_set_port_id() - Set the port ID for a p2sb child device | |
117 | * | |
118 | * This must be called in a device's bind() method when OF_PLATDATA is used | |
119 | * since the uclass cannot access the device's of-platdata. | |
120 | * | |
121 | * @dev: Child device (whose parent is UCLASS_P2SB) | |
122 | * @portid: Port ID of child device | |
123 | * @return 0 if OK, -ENODEV is the p2sb device could not be found | |
124 | */ | |
125 | int p2sb_set_port_id(struct udevice *dev, int portid); | |
126 | ||
127 | /** | |
128 | * p2sb_get_port_id() - Get the port ID for a p2sb child device | |
129 | * | |
130 | * @dev: Child device (whose parent is UCLASS_P2SB) | |
131 | * @return Port ID of that child | |
132 | */ | |
133 | int p2sb_get_port_id(struct udevice *dev); | |
134 | ||
135 | #endif |