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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2019 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#ifndef __p2sb_h
#define __p2sb_h
/* Port Id lives in bits 23:16 and register offset lives in 15:0 of address */
#define PCR_PORTID_SHIFT 16
#if !defined(__ACPI__)
/* These registers contain IOAPIC and HPET devfn */
#define PCH_P2SB_IBDF 0x6c
#define PCH_P2SB_HBDF 0x70
/**
* struct p2sb_child_plat - Information about each child of a p2sb device
*
* @pid: Port ID for this child
*/
struct p2sb_child_plat {
uint pid;
};
/**
* struct p2sb_uc_priv - information for the uclass about each device
*
* This must be set up by the driver when it is probed
*
* @mmio_base: Base address of P2SB region
*/
struct p2sb_uc_priv {
uint mmio_base;
};
/**
* struct p2sb_ops - Operations for the P2SB
*/
struct p2sb_ops {
/**
* set_hide() - Set/clear the 'hide' bit on the p2sb
*
* This device can be hidden from the PCI bus if needed. This method
* can be called before the p2sb is probed.
*
* @dev: P2SB device
* @hide: true to hide the device, false to show it
* @return 0 if OK, -ve on error
*/
int (*set_hide)(struct udevice *dev, bool hide);
};
#define p2sb_get_ops(dev) ((struct p2sb_ops *)(dev)->driver->ops)
/**
* p2sb_set_hide() - Set/clear the 'hide' bit on the p2sb
*
* This device can be hidden from the PCI bus if needed. This method
* can be called before the p2sb is probed.
*
* @dev: P2SB device
* @hide: true to hide the device, false to show it
* @return 0 if OK, -ve on error
*/
int p2sb_set_hide(struct udevice *dev, bool hide);
/**
* pcr_read32/16/8() - Read from a PCR device
*
* Reads data from a PCR device within the P2SB
*
* @dev: Device to read from
* @offset: Offset within device to read
* @return value read
*/
uint pcr_read32(struct udevice *dev, uint offset);
uint pcr_read16(struct udevice *dev, uint offset);
uint pcr_read8(struct udevice *dev, uint offset);
/**
* pcr_read32/16/8() - Write to a PCR device
*
* Writes data to a PCR device within the P2SB
*
* @dev: Device to write to
* @offset: Offset within device to write
* @data: Data to write
*/
void pcr_write32(struct udevice *dev, uint offset, uint data);
void pcr_write16(struct udevice *dev, uint offset, uint data);
void pcr_write8(struct udevice *dev, uint offset, uint data);
/**
* pcr_clrsetbits32/16/8() - Update a PCR device
*
* Updates dat in a PCR device within the P2SB
*
* This reads from the device, clears and set bits, then writes back.
*
* new_data = (old_data & ~clr) | set
*
* @dev: Device to update
* @offset: Offset within device to update
* @clr: Bits to clear after reading
* @set: Bits to set before writing
*/
void pcr_clrsetbits32(struct udevice *dev, uint offset, uint clr, uint set);
void pcr_clrsetbits16(struct udevice *dev, uint offset, uint clr, uint set);
void pcr_clrsetbits8(struct udevice *dev, uint offset, uint clr, uint set);
static inline void pcr_setbits32(struct udevice *dev, uint offset, uint set)
{
return pcr_clrsetbits32(dev, offset, 0, set);
}
static inline void pcr_setbits16(struct udevice *dev, uint offset, uint set)
{
return pcr_clrsetbits16(dev, offset, 0, set);
}
static inline void pcr_setbits8(struct udevice *dev, uint offset, uint set)
{
return pcr_clrsetbits8(dev, offset, 0, set);
}
static inline void pcr_clrbits32(struct udevice *dev, uint offset, uint clr)
{
return pcr_clrsetbits32(dev, offset, clr, 0);
}
static inline void pcr_clrbits16(struct udevice *dev, uint offset, uint clr)
{
return pcr_clrsetbits16(dev, offset, clr, 0);
}
static inline void pcr_clrbits8(struct udevice *dev, uint offset, uint clr)
{
return pcr_clrsetbits8(dev, offset, clr, 0);
}
/**
* p2sb_set_port_id() - Set the port ID for a p2sb child device
*
* This must be called in a device's bind() method when OF_PLATDATA is used
* since the uclass cannot access the device's of-platdata.
*
* @dev: Child device (whose parent is UCLASS_P2SB)
* @portid: Port ID of child device
* @return 0 if OK, -ENODEV is the p2sb device could not be found
*/
int p2sb_set_port_id(struct udevice *dev, int portid);
/**
* p2sb_get_port_id() - Get the port ID for a p2sb child device
*
* @dev: Child device (whose parent is UCLASS_P2SB)
* @return Port ID of that child
*/
int p2sb_get_port_id(struct udevice *dev);
/**
* pcr_reg_address() Convert an offset in p2sb space to an absolute address
*
* @dev: Child device (whose parent is UCLASS_P2SB)
* @offset: Offset within that child's address space
* @return pointer to that offset within the child's address space
*/
void *pcr_reg_address(struct udevice *dev, uint offset);
#endif /* !__ACPI__ */
#endif
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