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>
18 #include <linux/serial_8250.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.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY);
31 p += sprintf(p, "uart8250,%s,0x%llx",
32 mmio ? "mmio" : "io", uart->addr.address);
34 p += sprintf(p, ",%llu", 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 add_preferred_console("uart", 8250, &options[9]);
46 return setup_early_serial8250_console(options);
53 setup_vga_console(struct pcdp_device *dev)
55 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
58 if_ptr = ((u8 *)dev + sizeof(struct pcdp_device));
59 if (if_ptr[0] == PCDP_IF_PCI) {
60 struct pcdp_if_pci if_pci;
62 /* struct copy since ifptr might not be correctly aligned */
64 memcpy(&if_pci, if_ptr, sizeof(if_pci));
66 if (if_pci.trans & PCDP_PCI_TRANS_IOPORT)
67 vga_console_iobase = if_pci.ioport_tra;
69 if (if_pci.trans & PCDP_PCI_TRANS_MMIO)
70 vga_console_membase = if_pci.mmio_tra;
73 if (efi_mem_type(vga_console_membase + 0xA0000) == EFI_CONVENTIONAL_MEMORY) {
74 printk(KERN_ERR "PCDP: VGA selected, but frame buffer is not MMIO!\n");
78 conswitchp = &vga_con;
79 printk(KERN_INFO "PCDP: VGA console\n");
87 efi_setup_pcdp_console(char *cmdline)
90 struct pcdp_uart *uart;
91 struct pcdp_device *dev, *end;
95 if (efi.hcdp == EFI_INVALID_TABLE_ADDR)
98 pcdp = early_ioremap(efi.hcdp, 4096);
99 printk(KERN_INFO "PCDP: v%d at 0x%lx\n", pcdp->rev, efi.hcdp);
101 if (strstr(cmdline, "console=hcdp")) {
104 } else if (strstr(cmdline, "console=")) {
105 printk(KERN_INFO "Explicit \"console=\"; ignoring PCDP\n");
109 if (pcdp->rev < 3 && efi_uart_console_only())
112 for (i = 0, uart = pcdp->uart; i < pcdp->num_uarts; i++, uart++) {
113 if (uart->flags & PCDP_UART_PRIMARY_CONSOLE || serial) {
114 if (uart->type == PCDP_CONSOLE_UART) {
115 rc = setup_serial_console(uart);
121 end = (struct pcdp_device *) ((u8 *) pcdp + pcdp->length);
122 for (dev = (struct pcdp_device *) (pcdp->uart + pcdp->num_uarts);
124 dev = (struct pcdp_device *) ((u8 *) dev + dev->length)) {
125 if (dev->flags & PCDP_PRIMARY_CONSOLE) {
126 if (dev->type == PCDP_CONSOLE_VGA) {
127 rc = setup_vga_console(dev);
134 early_iounmap(pcdp, 4096);