1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright 2019 Google LLC
4 * Written by Simon Glass <sjg@chromium.org>
10 /* Port Id lives in bits 23:16 and register offset lives in 15:0 of address */
11 #define PCR_PORTID_SHIFT 16
14 * struct p2sb_child_platdata - Information about each child of a p2sb device
16 * @pid: Port ID for this child
18 struct p2sb_child_platdata {
23 * struct p2sb_uc_priv - information for the uclass about each device
25 * This must be set up by the driver when it is probed
27 * @mmio_base: Base address of P2SB region
34 * struct p2sb_ops - Operations for the P2SB (none at present)
39 #define p2sb_get_ops(dev) ((struct p2sb_ops *)(dev)->driver->ops)
42 * pcr_read32/16/8() - Read from a PCR device
44 * Reads data from a PCR device within the P2SB
46 * @dev: Device to read from
47 * @offset: Offset within device to read
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);
55 * pcr_read32/16/8() - Write to a PCR device
57 * Writes data to a PCR device within the P2SB
59 * @dev: Device to write to
60 * @offset: Offset within device to write
61 * @data: Data to write
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);
68 * pcr_clrsetbits32/16/8() - Update a PCR device
70 * Updates dat in a PCR device within the P2SB
72 * This reads from the device, clears and set bits, then writes back.
74 * new_data = (old_data & ~clr) | set
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
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);
85 static inline void pcr_setbits32(struct udevice *dev, uint offset, uint set)
87 return pcr_clrsetbits32(dev, offset, 0, set);
90 static inline void pcr_setbits16(struct udevice *dev, uint offset, uint set)
92 return pcr_clrsetbits16(dev, offset, 0, set);
95 static inline void pcr_setbits8(struct udevice *dev, uint offset, uint set)
97 return pcr_clrsetbits8(dev, offset, 0, set);
100 static inline void pcr_clrbits32(struct udevice *dev, uint offset, uint clr)
102 return pcr_clrsetbits32(dev, offset, clr, 0);
105 static inline void pcr_clrbits16(struct udevice *dev, uint offset, uint clr)
107 return pcr_clrsetbits16(dev, offset, clr, 0);
110 static inline void pcr_clrbits8(struct udevice *dev, uint offset, uint clr)
112 return pcr_clrsetbits8(dev, offset, clr, 0);
116 * p2sb_set_port_id() - Set the port ID for a p2sb child device
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.
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
125 int p2sb_set_port_id(struct udevice *dev, int portid);
128 * p2sb_get_port_id() - Get the port ID for a p2sb child device
130 * @dev: Child device (whose parent is UCLASS_P2SB)
131 * @return Port ID of that child
133 int p2sb_get_port_id(struct udevice *dev);