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authorMark Maule <maule@sgi.com>2005-04-25 16:51:00 -0400
committerTony Luck <tony.luck@intel.com>2005-06-28 12:09:06 -0400
commit66b7f8a30437b8639e798f7db8e9be1da5711efa (patch)
tree288703e10bab793bc399961059ad485604539955 /drivers
parent54522b6613a03807f057fd567794a31267ef85cb (diff)
[IA64-SGI] pcdp: add PCDP pci interface support
Resend 2 with changes per Bjorn Helgaas comments. Changes from original: + Change globals to vga_console_iobase/vga_console_membase and make them unconditional. + Address style-related comments. Patch to extend the PCDP vga setup code to support PCI io/mem translations for the legacy vga ioport and ram spaces on architectures (e.g. altix) which need them. Summary of the changes: drivers/firmware/pcdp.c drivers/firmware/pcdp.h ----------------------- + add declaration for the spec-defined PCI interface struct (pcdp_if_pci) as well as support macros. + extend setup_vga_console() to know about pcdp_if_pci and add a couple of globals to hold the io and mem translation offsets if present. arch/ia64/kernel/setup.c ------------------------ + tweek early_console_setup() to allow multiple early console setup routines to be called. include/asm-ia64/vga.h ---------------------- + make VGA_MAP_MEM vga_console_membase aware Signed-off-by: Mark Maule <maule@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/firmware/pcdp.c24
-rw-r--r--drivers/firmware/pcdp.h33
2 files changed, 50 insertions, 7 deletions
diff --git a/drivers/firmware/pcdp.c b/drivers/firmware/pcdp.c
index 839b44a7e08b..53c95c0bbf46 100644
--- a/drivers/firmware/pcdp.c
+++ b/drivers/firmware/pcdp.c
@@ -16,6 +16,7 @@
16#include <linux/console.h> 16#include <linux/console.h>
17#include <linux/efi.h> 17#include <linux/efi.h>
18#include <linux/serial.h> 18#include <linux/serial.h>
19#include <asm/vga.h>
19#include "pcdp.h" 20#include "pcdp.h"
20 21
21static int __init 22static int __init
@@ -40,10 +41,27 @@ setup_serial_console(struct pcdp_uart *uart)
40} 41}
41 42
42static int __init 43static int __init
43setup_vga_console(struct pcdp_vga *vga) 44setup_vga_console(struct pcdp_device *dev)
44{ 45{
45#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE) 46#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
46 if (efi_mem_type(0xA0000) == EFI_CONVENTIONAL_MEMORY) { 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) {
47 printk(KERN_ERR "PCDP: VGA selected, but frame buffer is not MMIO!\n"); 65 printk(KERN_ERR "PCDP: VGA selected, but frame buffer is not MMIO!\n");
48 return -ENODEV; 66 return -ENODEV;
49 } 67 }
@@ -95,7 +113,7 @@ efi_setup_pcdp_console(char *cmdline)
95 dev = (struct pcdp_device *) ((u8 *) dev + dev->length)) { 113 dev = (struct pcdp_device *) ((u8 *) dev + dev->length)) {
96 if (dev->flags & PCDP_PRIMARY_CONSOLE) { 114 if (dev->flags & PCDP_PRIMARY_CONSOLE) {
97 if (dev->type == PCDP_CONSOLE_VGA) { 115 if (dev->type == PCDP_CONSOLE_VGA) {
98 return setup_vga_console((struct pcdp_vga *) dev); 116 return setup_vga_console(dev);
99 } 117 }
100 } 118 }
101 } 119 }
diff --git a/drivers/firmware/pcdp.h b/drivers/firmware/pcdp.h
index 1dc7c88b7b4d..e72cc47de33b 100644
--- a/drivers/firmware/pcdp.h
+++ b/drivers/firmware/pcdp.h
@@ -52,11 +52,34 @@ struct pcdp_uart {
52 u32 clock_rate; 52 u32 clock_rate;
53 u8 pci_prog_intfc; 53 u8 pci_prog_intfc;
54 u8 flags; 54 u8 flags;
55}; 55} __attribute__((packed));
56
57#define PCDP_IF_PCI 1
58
59/* pcdp_if_pci.trans */
60#define PCDP_PCI_TRANS_IOPORT 0x02
61#define PCDP_PCI_TRANS_MMIO 0x01
62
63struct pcdp_if_pci {
64 u8 interconnect;
65 u8 reserved;
66 u16 length;
67 u8 segment;
68 u8 bus;
69 u8 dev;
70 u8 fun;
71 u16 dev_id;
72 u16 vendor_id;
73 u32 acpi_interrupt;
74 u64 mmio_tra;
75 u64 ioport_tra;
76 u8 flags;
77 u8 trans;
78} __attribute__((packed));
56 79
57struct pcdp_vga { 80struct pcdp_vga {
58 u8 count; /* address space descriptors */ 81 u8 count; /* address space descriptors */
59}; 82} __attribute__((packed));
60 83
61/* pcdp_device.flags */ 84/* pcdp_device.flags */
62#define PCDP_PRIMARY_CONSOLE 1 85#define PCDP_PRIMARY_CONSOLE 1
@@ -66,7 +89,9 @@ struct pcdp_device {
66 u8 flags; 89 u8 flags;
67 u16 length; 90 u16 length;
68 u16 efi_index; 91 u16 efi_index;
69}; 92 /* next data is pcdp_if_pci or pcdp_if_acpi (not yet supported) */
93 /* next data is device specific type (currently only pcdp_vga) */
94} __attribute__((packed));
70 95
71struct pcdp { 96struct pcdp {
72 u8 signature[4]; 97 u8 signature[4];
@@ -81,4 +106,4 @@ struct pcdp {
81 u32 num_uarts; 106 u32 num_uarts;
82 struct pcdp_uart uart[0]; /* actual size is num_uarts */ 107 struct pcdp_uart uart[0]; /* actual size is num_uarts */
83 /* remainder of table is pcdp_device structures */ 108 /* remainder of table is pcdp_device structures */
84}; 109} __attribute__((packed));