linux/drivers/firmware/pcdp.h
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   1/*
   2 * Definitions for PCDP-defined console devices
   3 *
   4 * For DIG64_HCDPv10a_01.pdf and DIG64_PCDPv20.pdf (v1.0a and v2.0 resp.),
   5 * please see <http://www.dig64.org/specifications/>
   6 *
   7 * (c) Copyright 2002, 2004 Hewlett-Packard Development Company, L.P.
   8 *      Khalid Aziz <khalid.aziz@hp.com>
   9 *      Bjorn Helgaas <bjorn.helgaas@hp.com>
  10 *
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License version 2 as
  13 * published by the Free Software Foundation.
  14 */
  15
  16#define PCDP_CONSOLE                    0
  17#define PCDP_DEBUG                      1
  18#define PCDP_CONSOLE_OUTPUT             2
  19#define PCDP_CONSOLE_INPUT              3
  20
  21#define PCDP_UART                       (0 << 3)
  22#define PCDP_VGA                        (1 << 3)
  23#define PCDP_USB                        (2 << 3)
  24
  25/* pcdp_uart.type and pcdp_device.type */
  26#define PCDP_CONSOLE_UART               (PCDP_UART | PCDP_CONSOLE)
  27#define PCDP_DEBUG_UART                 (PCDP_UART | PCDP_DEBUG)
  28#define PCDP_CONSOLE_VGA                (PCDP_VGA  | PCDP_CONSOLE_OUTPUT)
  29#define PCDP_CONSOLE_USB                (PCDP_USB  | PCDP_CONSOLE_INPUT)
  30
  31/* pcdp_uart.flags */
  32#define PCDP_UART_EDGE_SENSITIVE        (1 << 0)
  33#define PCDP_UART_ACTIVE_LOW            (1 << 1)
  34#define PCDP_UART_PRIMARY_CONSOLE       (1 << 2)
  35#define PCDP_UART_IRQ                   (1 << 6) /* in pci_func for rev < 3 */
  36#define PCDP_UART_PCI                   (1 << 7) /* in pci_func for rev < 3 */
  37
  38struct pcdp_uart {
  39        u8                              type;
  40        u8                              bits;
  41        u8                              parity;
  42        u8                              stop_bits;
  43        u8                              pci_seg;
  44        u8                              pci_bus;
  45        u8                              pci_dev;
  46        u8                              pci_func;
  47        u64                             baud;
  48        struct acpi_generic_address     addr;
  49        u16                             pci_dev_id;
  50        u16                             pci_vendor_id;
  51        u32                             gsi;
  52        u32                             clock_rate;
  53        u8                              pci_prog_intfc;
  54        u8                              flags;
  55        u16                             conout_index;
  56        u32                             reserved;
  57} __attribute__((packed));
  58
  59#define PCDP_IF_PCI     1
  60
  61/* pcdp_if_pci.trans */
  62#define PCDP_PCI_TRANS_IOPORT   0x02
  63#define PCDP_PCI_TRANS_MMIO     0x01
  64
  65struct pcdp_if_pci {
  66        u8                      interconnect;
  67        u8                      reserved;
  68        u16                     length;
  69        u8                      segment;
  70        u8                      bus;
  71        u8                      dev;
  72        u8                      fun;
  73        u16                     dev_id;
  74        u16                     vendor_id;
  75        u32                     acpi_interrupt;
  76        u64                     mmio_tra;
  77        u64                     ioport_tra;
  78        u8                      flags;
  79        u8                      trans;
  80} __attribute__((packed));
  81
  82struct pcdp_vga {
  83        u8                      count;          /* address space descriptors */
  84} __attribute__((packed));
  85
  86/* pcdp_device.flags */
  87#define PCDP_PRIMARY_CONSOLE    1
  88
  89struct pcdp_device {
  90        u8                      type;
  91        u8                      flags;
  92        u16                     length;
  93        u16                     efi_index;
  94        /* next data is pcdp_if_pci or pcdp_if_acpi (not yet supported) */
  95        /* next data is device specific type (currently only pcdp_vga) */
  96} __attribute__((packed));
  97
  98struct pcdp {
  99        u8                      signature[4];
 100        u32                     length;
 101        u8                      rev;            /* PCDP v2.0 is rev 3 */
 102        u8                      chksum;
 103        u8                      oemid[6];
 104        u8                      oem_tabid[8];
 105        u32                     oem_rev;
 106        u8                      creator_id[4];
 107        u32                     creator_rev;
 108        u32                     num_uarts;
 109        struct pcdp_uart        uart[0];        /* actual size is num_uarts */
 110        /* remainder of table is pcdp_device structures */
 111} __attribute__((packed));
 112
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