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-rw-r--r--drivers/firmware/pcdp.h108
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));