Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Parse the EFI PCDP table to locate the console device. | |
3 | * | |
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> | |
8 | * | |
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. | |
12 | */ | |
13 | ||
97d3a00f | 14 | #include <linux/config.h> |
1da177e4 LT |
15 | #include <linux/acpi.h> |
16 | #include <linux/console.h> | |
17 | #include <linux/efi.h> | |
18 | #include <linux/serial.h> | |
66b7f8a3 | 19 | #include <asm/vga.h> |
1da177e4 LT |
20 | #include "pcdp.h" |
21 | ||
22 | static int __init | |
23 | setup_serial_console(struct pcdp_uart *uart) | |
24 | { | |
25 | #ifdef CONFIG_SERIAL_8250_CONSOLE | |
26 | int mmio; | |
280dedb8 | 27 | static char options[64], *p = options; |
1da177e4 LT |
28 | |
29 | mmio = (uart->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY); | |
280dedb8 BH |
30 | p += sprintf(p, "console=uart,%s,0x%lx", |
31 | mmio ? "mmio" : "io", uart->addr.address); | |
32 | if (uart->baud) | |
33 | p += sprintf(p, ",%lu", uart->baud); | |
34 | if (uart->bits) | |
35 | p += sprintf(p, "n%d", uart->bits); | |
1da177e4 LT |
36 | |
37 | return early_serial_console_init(options); | |
38 | #else | |
39 | return -ENODEV; | |
40 | #endif | |
41 | } | |
42 | ||
43 | static int __init | |
66b7f8a3 | 44 | setup_vga_console(struct pcdp_device *dev) |
1da177e4 LT |
45 | { |
46 | #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE) | |
66b7f8a3 MM |
47 | u8 *if_ptr; |
48 | ||
49 | if_ptr = ((u8 *)dev + sizeof(struct pcdp_device)); | |
50 | if (if_ptr[0] == PCDP_IF_PCI) { | |
51 | struct pcdp_if_pci if_pci; | |
52 | ||
53 | /* struct copy since ifptr might not be correctly aligned */ | |
54 | ||
55 | memcpy(&if_pci, if_ptr, sizeof(if_pci)); | |
56 | ||
57 | if (if_pci.trans & PCDP_PCI_TRANS_IOPORT) | |
58 | vga_console_iobase = if_pci.ioport_tra; | |
59 | ||
60 | if (if_pci.trans & PCDP_PCI_TRANS_MMIO) | |
61 | vga_console_membase = if_pci.mmio_tra; | |
62 | } | |
63 | ||
64 | if (efi_mem_type(vga_console_membase + 0xA0000) == EFI_CONVENTIONAL_MEMORY) { | |
1da177e4 LT |
65 | printk(KERN_ERR "PCDP: VGA selected, but frame buffer is not MMIO!\n"); |
66 | return -ENODEV; | |
67 | } | |
68 | ||
69 | conswitchp = &vga_con; | |
70 | printk(KERN_INFO "PCDP: VGA console\n"); | |
71 | return 0; | |
72 | #else | |
73 | return -ENODEV; | |
74 | #endif | |
75 | } | |
76 | ||
77 | int __init | |
78 | efi_setup_pcdp_console(char *cmdline) | |
79 | { | |
80 | struct pcdp *pcdp; | |
81 | struct pcdp_uart *uart; | |
82 | struct pcdp_device *dev, *end; | |
83 | int i, serial = 0; | |
84 | ||
85 | pcdp = efi.hcdp; | |
86 | if (!pcdp) | |
87 | return -ENODEV; | |
88 | ||
89 | printk(KERN_INFO "PCDP: v%d at 0x%lx\n", pcdp->rev, __pa(pcdp)); | |
90 | ||
91 | if (strstr(cmdline, "console=hcdp")) { | |
92 | if (pcdp->rev < 3) | |
93 | serial = 1; | |
94 | } else if (strstr(cmdline, "console=")) { | |
95 | printk(KERN_INFO "Explicit \"console=\"; ignoring PCDP\n"); | |
96 | return -ENODEV; | |
97 | } | |
98 | ||
99 | if (pcdp->rev < 3 && efi_uart_console_only()) | |
100 | serial = 1; | |
101 | ||
102 | for (i = 0, uart = pcdp->uart; i < pcdp->num_uarts; i++, uart++) { | |
103 | if (uart->flags & PCDP_UART_PRIMARY_CONSOLE || serial) { | |
104 | if (uart->type == PCDP_CONSOLE_UART) { | |
105 | return setup_serial_console(uart); | |
106 | } | |
107 | } | |
108 | } | |
109 | ||
110 | end = (struct pcdp_device *) ((u8 *) pcdp + pcdp->length); | |
111 | for (dev = (struct pcdp_device *) (pcdp->uart + pcdp->num_uarts); | |
112 | dev < end; | |
113 | dev = (struct pcdp_device *) ((u8 *) dev + dev->length)) { | |
114 | if (dev->flags & PCDP_PRIMARY_CONSOLE) { | |
115 | if (dev->type == PCDP_CONSOLE_VGA) { | |
66b7f8a3 | 116 | return setup_vga_console(dev); |
1da177e4 LT |
117 | } |
118 | } | |
119 | } | |
120 | ||
121 | return -ENODEV; | |
122 | } |