2 * Parse the EFI PCDP table to locate the console device.
4 * (c) Copyright 2002, 2003, 2004 Hewlett-Packard Development Company, L.P.
5 * Khalid Aziz <khalid.aziz@hp.com>
6 * Alex Williamson <alex.williamson@hp.com>
7 * Bjorn Helgaas <bjorn.helgaas@hp.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/acpi.h>
15 #include <linux/console.h>
16 #include <linux/efi.h>
17 #include <linux/serial.h>
22 setup_serial_console(struct pcdp_uart *uart)
24 #ifdef CONFIG_SERIAL_8250_CONSOLE
26 static char options[64], *p = options;
29 mmio = (uart->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY);
30 p += sprintf(p, "console=uart,%s,0x%lx",
31 mmio ? "mmio" : "io", uart->addr.address);
33 p += sprintf(p, ",%lu", uart->baud);
35 switch (uart->parity) {
36 case 0x2: parity = 'e'; break;
37 case 0x3: parity = 'o'; break;
38 default: parity = 'n';
40 p += sprintf(p, "%c%d", parity, uart->bits);
44 return early_serial_console_init(options);
51 setup_vga_console(struct pcdp_device *dev)
53 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
56 if_ptr = ((u8 *)dev + sizeof(struct pcdp_device));
57 if (if_ptr[0] == PCDP_IF_PCI) {
58 struct pcdp_if_pci if_pci;
60 /* struct copy since ifptr might not be correctly aligned */
62 memcpy(&if_pci, if_ptr, sizeof(if_pci));
64 if (if_pci.trans & PCDP_PCI_TRANS_IOPORT)
65 vga_console_iobase = if_pci.ioport_tra;
67 if (if_pci.trans & PCDP_PCI_TRANS_MMIO)
68 vga_console_membase = if_pci.mmio_tra;
71 if (efi_mem_type(vga_console_membase + 0xA0000) == EFI_CONVENTIONAL_MEMORY) {
72 printk(KERN_ERR "PCDP: VGA selected, but frame buffer is not MMIO!\n");
76 conswitchp = &vga_con;
77 printk(KERN_INFO "PCDP: VGA console\n");
85 efi_setup_pcdp_console(char *cmdline)
88 struct pcdp_uart *uart;
89 struct pcdp_device *dev, *end;
93 if (efi.hcdp == EFI_INVALID_TABLE_ADDR)
96 pcdp = ioremap(efi.hcdp, 4096);
97 printk(KERN_INFO "PCDP: v%d at 0x%lx\n", pcdp->rev, efi.hcdp);
99 if (strstr(cmdline, "console=hcdp")) {
102 } else if (strstr(cmdline, "console=")) {
103 printk(KERN_INFO "Explicit \"console=\"; ignoring PCDP\n");
107 if (pcdp->rev < 3 && efi_uart_console_only())
110 for (i = 0, uart = pcdp->uart; i < pcdp->num_uarts; i++, uart++) {
111 if (uart->flags & PCDP_UART_PRIMARY_CONSOLE || serial) {
112 if (uart->type == PCDP_CONSOLE_UART) {
113 rc = setup_serial_console(uart);
119 end = (struct pcdp_device *) ((u8 *) pcdp + pcdp->length);
120 for (dev = (struct pcdp_device *) (pcdp->uart + pcdp->num_uarts);
122 dev = (struct pcdp_device *) ((u8 *) dev + dev->length)) {
123 if (dev->flags & PCDP_PRIMARY_CONSOLE) {
124 if (dev->type == PCDP_CONSOLE_VGA) {
125 rc = setup_vga_console(dev);