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/config.h>
15 #include <linux/acpi.h>
16 #include <linux/console.h>
17 #include <linux/efi.h>
18 #include <linux/serial.h>
23 setup_serial_console(struct pcdp_uart *uart)
25 #ifdef CONFIG_SERIAL_8250_CONSOLE
27 static char options[64], *p = options;
30 mmio = (uart->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY);
31 p += sprintf(p, "console=uart,%s,0x%lx",
32 mmio ? "mmio" : "io", uart->addr.address);
34 p += sprintf(p, ",%lu", uart->baud);
36 switch (uart->parity) {
37 case 0x2: parity = 'e'; break;
38 case 0x3: parity = 'o'; break;
39 default: parity = 'n';
41 p += sprintf(p, "%c%d", parity, uart->bits);
45 return early_serial_console_init(options);
52 setup_vga_console(struct pcdp_device *dev)
54 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
57 if_ptr = ((u8 *)dev + sizeof(struct pcdp_device));
58 if (if_ptr[0] == PCDP_IF_PCI) {
59 struct pcdp_if_pci if_pci;
61 /* struct copy since ifptr might not be correctly aligned */
63 memcpy(&if_pci, if_ptr, sizeof(if_pci));
65 if (if_pci.trans & PCDP_PCI_TRANS_IOPORT)
66 vga_console_iobase = if_pci.ioport_tra;
68 if (if_pci.trans & PCDP_PCI_TRANS_MMIO)
69 vga_console_membase = if_pci.mmio_tra;
72 if (efi_mem_type(vga_console_membase + 0xA0000) == EFI_CONVENTIONAL_MEMORY) {
73 printk(KERN_ERR "PCDP: VGA selected, but frame buffer is not MMIO!\n");
77 conswitchp = &vga_con;
78 printk(KERN_INFO "PCDP: VGA console\n");
86 efi_setup_pcdp_console(char *cmdline)
89 struct pcdp_uart *uart;
90 struct pcdp_device *dev, *end;
94 if (efi.hcdp == EFI_INVALID_TABLE_ADDR)
97 pcdp = ioremap(efi.hcdp, 4096);
98 printk(KERN_INFO "PCDP: v%d at 0x%lx\n", pcdp->rev, efi.hcdp);
100 if (strstr(cmdline, "console=hcdp")) {
103 } else if (strstr(cmdline, "console=")) {
104 printk(KERN_INFO "Explicit \"console=\"; ignoring PCDP\n");
108 if (pcdp->rev < 3 && efi_uart_console_only())
111 for (i = 0, uart = pcdp->uart; i < pcdp->num_uarts; i++, uart++) {
112 if (uart->flags & PCDP_UART_PRIMARY_CONSOLE || serial) {
113 if (uart->type == PCDP_CONSOLE_UART) {
114 rc = setup_serial_console(uart);
120 end = (struct pcdp_device *) ((u8 *) pcdp + pcdp->length);
121 for (dev = (struct pcdp_device *) (pcdp->uart + pcdp->num_uarts);
123 dev = (struct pcdp_device *) ((u8 *) dev + dev->length)) {
124 if (dev->flags & PCDP_PRIMARY_CONSOLE) {
125 if (dev->type == PCDP_CONSOLE_VGA) {
126 rc = setup_vga_console(dev);