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
38 * set_hide() - Set/clear the 'hide' bit on the p2sb
40 * This device can be hidden from the PCI bus if needed. This method
41 * can be called before the p2sb is probed.
44 * @hide: true to hide the device, false to show it
45 * @return 0 if OK, -ve on error
47 int (*set_hide)(struct udevice *dev, bool hide);
50 #define p2sb_get_ops(dev) ((struct p2sb_ops *)(dev)->driver->ops)
53 * p2sb_set_hide() - Set/clear the 'hide' bit on the p2sb
55 * This device can be hidden from the PCI bus if needed. This method
56 * can be called before the p2sb is probed.
59 * @hide: true to hide the device, false to show it
60 * @return 0 if OK, -ve on error
62 int p2sb_set_hide(struct udevice *dev, bool hide);
65 * pcr_read32/16/8() - Read from a PCR device
67 * Reads data from a PCR device within the P2SB
69 * @dev: Device to read from
70 * @offset: Offset within device to read
73 uint pcr_read32(struct udevice *dev, uint offset);
74 uint pcr_read16(struct udevice *dev, uint offset);
75 uint pcr_read8(struct udevice *dev, uint offset);
78 * pcr_read32/16/8() - Write to a PCR device
80 * Writes data to a PCR device within the P2SB
82 * @dev: Device to write to
83 * @offset: Offset within device to write
84 * @data: Data to write
86 void pcr_write32(struct udevice *dev, uint offset, uint data);
87 void pcr_write16(struct udevice *dev, uint offset, uint data);
88 void pcr_write8(struct udevice *dev, uint offset, uint data);
91 * pcr_clrsetbits32/16/8() - Update a PCR device
93 * Updates dat in a PCR device within the P2SB
95 * This reads from the device, clears and set bits, then writes back.
97 * new_data = (old_data & ~clr) | set
99 * @dev: Device to update
100 * @offset: Offset within device to update
101 * @clr: Bits to clear after reading
102 * @set: Bits to set before writing
104 void pcr_clrsetbits32(struct udevice *dev, uint offset, uint clr, uint set);
105 void pcr_clrsetbits16(struct udevice *dev, uint offset, uint clr, uint set);
106 void pcr_clrsetbits8(struct udevice *dev, uint offset, uint clr, uint set);
108 static inline void pcr_setbits32(struct udevice *dev, uint offset, uint set)
110 return pcr_clrsetbits32(dev, offset, 0, set);
113 static inline void pcr_setbits16(struct udevice *dev, uint offset, uint set)
115 return pcr_clrsetbits16(dev, offset, 0, set);
118 static inline void pcr_setbits8(struct udevice *dev, uint offset, uint set)
120 return pcr_clrsetbits8(dev, offset, 0, set);
123 static inline void pcr_clrbits32(struct udevice *dev, uint offset, uint clr)
125 return pcr_clrsetbits32(dev, offset, clr, 0);
128 static inline void pcr_clrbits16(struct udevice *dev, uint offset, uint clr)
130 return pcr_clrsetbits16(dev, offset, clr, 0);
133 static inline void pcr_clrbits8(struct udevice *dev, uint offset, uint clr)
135 return pcr_clrsetbits8(dev, offset, clr, 0);
139 * p2sb_set_port_id() - Set the port ID for a p2sb child device
141 * This must be called in a device's bind() method when OF_PLATDATA is used
142 * since the uclass cannot access the device's of-platdata.
144 * @dev: Child device (whose parent is UCLASS_P2SB)
145 * @portid: Port ID of child device
146 * @return 0 if OK, -ENODEV is the p2sb device could not be found
148 int p2sb_set_port_id(struct udevice *dev, int portid);
151 * p2sb_get_port_id() - Get the port ID for a p2sb child device
153 * @dev: Child device (whose parent is UCLASS_P2SB)
154 * @return Port ID of that child
156 int p2sb_get_port_id(struct udevice *dev);
159 * pcr_reg_address() Convert an offset in p2sb space to an absolute address
161 * @dev: Child device (whose parent is UCLASS_P2SB)
162 * @offset: Offset within that child's address space
163 * @return pointer to that offset within the child's address space
165 void *pcr_reg_address(struct udevice *dev, uint offset);