diff options
Diffstat (limited to 'drivers/firmware/pcdp.h')
| -rw-r--r-- | drivers/firmware/pcdp.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/firmware/pcdp.h b/drivers/firmware/pcdp.h new file mode 100644 index 000000000..e02540571 --- /dev/null +++ b/drivers/firmware/pcdp.h @@ -0,0 +1,108 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Definitions for PCDP-defined console devices + * + * For DIG64_HCDPv10a_01.pdf and DIG64_PCDPv20.pdf (v1.0a and v2.0 resp.), + * please see <http://www.dig64.org/specifications/> + * + * (c) Copyright 2002, 2004 Hewlett-Packard Development Company, L.P. + * Khalid Aziz <khalid.aziz@hp.com> + * Bjorn Helgaas <bjorn.helgaas@hp.com> + */ + +#define PCDP_CONSOLE 0 +#define PCDP_DEBUG 1 +#define PCDP_CONSOLE_OUTPUT 2 +#define PCDP_CONSOLE_INPUT 3 + +#define PCDP_UART (0 << 3) +#define PCDP_VGA (1 << 3) +#define PCDP_USB (2 << 3) + +/* pcdp_uart.type and pcdp_device.type */ +#define PCDP_CONSOLE_UART (PCDP_UART | PCDP_CONSOLE) +#define PCDP_DEBUG_UART (PCDP_UART | PCDP_DEBUG) +#define PCDP_CONSOLE_VGA (PCDP_VGA | PCDP_CONSOLE_OUTPUT) +#define PCDP_CONSOLE_USB (PCDP_USB | PCDP_CONSOLE_INPUT) + +/* pcdp_uart.flags */ +#define PCDP_UART_EDGE_SENSITIVE (1 << 0) +#define PCDP_UART_ACTIVE_LOW (1 << 1) +#define PCDP_UART_PRIMARY_CONSOLE (1 << 2) +#define PCDP_UART_IRQ (1 << 6) /* in pci_func for rev < 3 */ +#define PCDP_UART_PCI (1 << 7) /* in pci_func for rev < 3 */ + +struct pcdp_uart { + u8 type; + u8 bits; + u8 parity; + u8 stop_bits; + u8 pci_seg; + u8 pci_bus; + u8 pci_dev; + u8 pci_func; + u64 baud; + struct acpi_generic_address addr; + u16 pci_dev_id; + u16 pci_vendor_id; + u32 gsi; + u32 clock_rate; + u8 pci_prog_intfc; + u8 flags; + u16 conout_index; + u32 reserved; +} __attribute__((packed)); + +#define PCDP_IF_PCI 1 + +/* pcdp_if_pci.trans */ +#define PCDP_PCI_TRANS_IOPORT 0x02 +#define PCDP_PCI_TRANS_MMIO 0x01 + +struct pcdp_if_pci { + u8 interconnect; + u8 reserved; + u16 length; + u8 segment; + u8 bus; + u8 dev; + u8 fun; + u16 dev_id; + u16 vendor_id; + u32 acpi_interrupt; + u64 mmio_tra; + u64 ioport_tra; + u8 flags; + u8 trans; +} __attribute__((packed)); + +struct pcdp_vga { + u8 count; /* address space descriptors */ +} __attribute__((packed)); + +/* pcdp_device.flags */ +#define PCDP_PRIMARY_CONSOLE 1 + +struct pcdp_device { + u8 type; + u8 flags; + u16 length; + u16 efi_index; + /* next data is pcdp_if_pci or pcdp_if_acpi (not yet supported) */ + /* next data is device specific type (currently only pcdp_vga) */ +} __attribute__((packed)); + +struct pcdp { + u8 signature[4]; + u32 length; + u8 rev; /* PCDP v2.0 is rev 3 */ + u8 chksum; + u8 oemid[6]; + u8 oem_tabid[8]; + u32 oem_rev; + u8 creator_id[4]; + u32 creator_rev; + u32 num_uarts; + struct pcdp_uart uart[]; /* actual size is num_uarts */ + /* remainder of table is pcdp_device structures */ +} __attribute__((packed)); |