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Simon Glass5bee27a2019-12-06 21:41:55 -07001/* 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 */
18struct 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 */
29struct p2sb_uc_priv {
30 uint mmio_base;
31};
32
33/**
34 * struct p2sb_ops - Operations for the P2SB (none at present)
35 */
36struct 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 */
50uint pcr_read32(struct udevice *dev, uint offset);
51uint pcr_read16(struct udevice *dev, uint offset);
52uint 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 */
63void pcr_write32(struct udevice *dev, uint offset, uint data);
64void pcr_write16(struct udevice *dev, uint offset, uint data);
65void 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 */
81void pcr_clrsetbits32(struct udevice *dev, uint offset, uint clr, uint set);
82void pcr_clrsetbits16(struct udevice *dev, uint offset, uint clr, uint set);
83void pcr_clrsetbits8(struct udevice *dev, uint offset, uint clr, uint set);
84
85static inline void pcr_setbits32(struct udevice *dev, uint offset, uint set)
86{
87 return pcr_clrsetbits32(dev, offset, 0, set);
88}
89
90static inline void pcr_setbits16(struct udevice *dev, uint offset, uint set)
91{
92 return pcr_clrsetbits16(dev, offset, 0, set);
93}
94
95static inline void pcr_setbits8(struct udevice *dev, uint offset, uint set)
96{
97 return pcr_clrsetbits8(dev, offset, 0, set);
98}
99
100static inline void pcr_clrbits32(struct udevice *dev, uint offset, uint clr)
101{
102 return pcr_clrsetbits32(dev, offset, clr, 0);
103}
104
105static inline void pcr_clrbits16(struct udevice *dev, uint offset, uint clr)
106{
107 return pcr_clrsetbits16(dev, offset, clr, 0);
108}
109
110static 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 */
125int 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 */
133int p2sb_get_port_id(struct udevice *dev);
134
135#endif