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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_platdata - Information about each child of a p2sb device
- *
- * @pid: Port ID for this child
- */
- struct p2sb_child_platdata {
- 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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