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; |
11be00cb | 28 | char parity; |
1da177e4 LT |
29 | |
30 | mmio = (uart->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY); | |
280dedb8 BH |
31 | p += sprintf(p, "console=uart,%s,0x%lx", |
32 | mmio ? "mmio" : "io", uart->addr.address); | |
11be00cb | 33 | if (uart->baud) { |
280dedb8 | 34 | p += sprintf(p, ",%lu", uart->baud); |
11be00cb BH |
35 | if (uart->bits) { |
36 | switch (uart->parity) { | |
37 | case 0x2: parity = 'e'; break; | |
38 | case 0x3: parity = 'o'; break; | |
39 | default: parity = 'n'; | |
40 | } | |
41 | p += sprintf(p, "%c%d", parity, uart->bits); | |
42 | } | |
43 | } | |
1da177e4 LT |
44 | |
45 | return early_serial_console_init(options); | |
46 | #else | |
47 | return -ENODEV; | |
48 | #endif | |
49 | } | |
50 | ||
51 | static int __init | |
66b7f8a3 | 52 | setup_vga_console(struct pcdp_device *dev) |
1da177e4 LT |
53 | { |
54 | #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE) | |
66b7f8a3 MM |
55 | u8 *if_ptr; |
56 | ||
57 | if_ptr = ((u8 *)dev + sizeof(struct pcdp_device)); | |
58 | if (if_ptr[0] == PCDP_IF_PCI) { | |
59 | struct pcdp_if_pci if_pci; | |
60 | ||
61 | /* struct copy since ifptr might not be correctly aligned */ | |
62 | ||
63 | memcpy(&if_pci, if_ptr, sizeof(if_pci)); | |
64 | ||
65 | if (if_pci.trans & PCDP_PCI_TRANS_IOPORT) | |
66 | vga_console_iobase = if_pci.ioport_tra; | |
67 | ||
68 | if (if_pci.trans & PCDP_PCI_TRANS_MMIO) | |
69 | vga_console_membase = if_pci.mmio_tra; | |
70 | } | |
71 | ||
72 | if (efi_mem_type(vga_console_membase + 0xA0000) == EFI_CONVENTIONAL_MEMORY) { | |
1da177e4 LT |
73 | printk(KERN_ERR "PCDP: VGA selected, but frame buffer is not MMIO!\n"); |
74 | return -ENODEV; | |
75 | } | |
76 | ||
77 | conswitchp = &vga_con; | |
78 | printk(KERN_INFO "PCDP: VGA console\n"); | |
79 | return 0; | |
80 | #else | |
81 | return -ENODEV; | |
82 | #endif | |
83 | } | |
84 | ||
85 | int __init | |
86 | efi_setup_pcdp_console(char *cmdline) | |
87 | { | |
88 | struct pcdp *pcdp; | |
89 | struct pcdp_uart *uart; | |
90 | struct pcdp_device *dev, *end; | |
91 | int i, serial = 0; | |
92 | ||
93 | pcdp = efi.hcdp; | |
94 | if (!pcdp) | |
95 | return -ENODEV; | |
96 | ||
97 | printk(KERN_INFO "PCDP: v%d at 0x%lx\n", pcdp->rev, __pa(pcdp)); | |
98 | ||
99 | if (strstr(cmdline, "console=hcdp")) { | |
100 | if (pcdp->rev < 3) | |
101 | serial = 1; | |
102 | } else if (strstr(cmdline, "console=")) { | |
103 | printk(KERN_INFO "Explicit \"console=\"; ignoring PCDP\n"); | |
104 | return -ENODEV; | |
105 | } | |
106 | ||
107 | if (pcdp->rev < 3 && efi_uart_console_only()) | |
108 | serial = 1; | |
109 | ||
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 | return setup_serial_console(uart); | |
114 | } | |
115 | } | |
116 | } | |
117 | ||
118 | end = (struct pcdp_device *) ((u8 *) pcdp + pcdp->length); | |
119 | for (dev = (struct pcdp_device *) (pcdp->uart + pcdp->num_uarts); | |
120 | dev < end; | |
121 | dev = (struct pcdp_device *) ((u8 *) dev + dev->length)) { | |
122 | if (dev->flags & PCDP_PRIMARY_CONSOLE) { | |
123 | if (dev->type == PCDP_CONSOLE_VGA) { | |
66b7f8a3 | 124 | return setup_vga_console(dev); |
1da177e4 LT |
125 | } |
126 | } | |
127 | } | |
128 | ||
129 | return -ENODEV; | |
130 | } |