280dedb8d6
The HCDP specs (i.e., PCDP revision < 3) allow zero as a default value for baud rate and data bits. So if firmware doesn't supply them, let early_serial_console_init() probe for them rather than telling it the baud rate is zero. Also, update the URL for the PCDP spec. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/*
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* Definitions for PCDP-defined console devices
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*
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* v1.0a: http://www.dig64.org/specifications/DIG64_HCDPv10a_01.pdf
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* v2.0: http://www.dig64.org/specifications/DIG64_PCDPv20.pdf
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*
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* (c) Copyright 2002, 2004 Hewlett-Packard Development Company, L.P.
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* Khalid Aziz <khalid.aziz@hp.com>
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* Bjorn Helgaas <bjorn.helgaas@hp.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#define PCDP_CONSOLE 0
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#define PCDP_DEBUG 1
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#define PCDP_CONSOLE_OUTPUT 2
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#define PCDP_CONSOLE_INPUT 3
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#define PCDP_UART (0 << 3)
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#define PCDP_VGA (1 << 3)
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#define PCDP_USB (2 << 3)
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/* pcdp_uart.type and pcdp_device.type */
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#define PCDP_CONSOLE_UART (PCDP_UART | PCDP_CONSOLE)
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#define PCDP_DEBUG_UART (PCDP_UART | PCDP_DEBUG)
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#define PCDP_CONSOLE_VGA (PCDP_VGA | PCDP_CONSOLE_OUTPUT)
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#define PCDP_CONSOLE_USB (PCDP_USB | PCDP_CONSOLE_INPUT)
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/* pcdp_uart.flags */
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#define PCDP_UART_EDGE_SENSITIVE (1 << 0)
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#define PCDP_UART_ACTIVE_LOW (1 << 1)
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#define PCDP_UART_PRIMARY_CONSOLE (1 << 2)
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#define PCDP_UART_IRQ (1 << 6) /* in pci_func for rev < 3 */
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#define PCDP_UART_PCI (1 << 7) /* in pci_func for rev < 3 */
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struct pcdp_uart {
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u8 type;
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u8 bits;
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u8 parity;
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u8 stop_bits;
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u8 pci_seg;
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u8 pci_bus;
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u8 pci_dev;
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u8 pci_func;
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u64 baud;
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struct acpi_generic_address addr;
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u16 pci_dev_id;
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u16 pci_vendor_id;
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u32 gsi;
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u32 clock_rate;
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u8 pci_prog_intfc;
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u8 flags;
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};
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struct pcdp_vga {
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u8 count; /* address space descriptors */
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};
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/* pcdp_device.flags */
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#define PCDP_PRIMARY_CONSOLE 1
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struct pcdp_device {
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u8 type;
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u8 flags;
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u16 length;
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u16 efi_index;
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};
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struct pcdp {
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u8 signature[4];
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u32 length;
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u8 rev; /* PCDP v2.0 is rev 3 */
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u8 chksum;
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u8 oemid[6];
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u8 oem_tabid[8];
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u32 oem_rev;
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u8 creator_id[4];
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u32 creator_rev;
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u32 num_uarts;
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struct pcdp_uart uart[0]; /* actual size is num_uarts */
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/* remainder of table is pcdp_device structures */
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};
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