1 /* $Id: tc.c,v 1.3 1999/10/09 00:01:32 ralf Exp $
2 * tc-init: We assume the TURBOchannel to be up and running so
3 * just probe for Modules and fill in the global data structure
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
10 * Copyright (c) Harald Koerfgen, 1998
14 #include <linux/string.h>
15 #include <linux/init.h>
16 #include <linux/ioport.h>
17 #include <asm/addrspace.h>
18 #include <asm/errno.h>
19 #include <asm/dec/machtype.h>
20 #include <asm/dec/tcinfo.h>
21 #include <asm/dec/tcmodule.h>
22 #include <asm/dec/interrupts.h>
24 #include <asm/ptrace.h>
25 #include <linux/kernel.h>
29 slot_info tc_bus
[MAX_SLOT
];
30 static int max_tcslot
= 0;
31 static tcinfo
*info
= (tcinfo
*)0;
33 unsigned long system_base
= 0;
35 extern void (*dbe_board_handler
)(struct pt_regs
*regs
);
36 extern unsigned long *(*rex_slot_address
)(int);
37 extern void *(*rex_gettcinfo
)(void);
40 * Interface to the world. Read comment in include/asm-mips/tc.h.
43 int search_tc_card(char *name
)
48 for (slot
= 0; slot
<= max_tcslot
; slot
++) {
50 if ((sip
->flags
& FREE
) && (strncmp(sip
->name
, name
, strlen(name
)) == 0)) {
58 void claim_tc_card(int slot
)
60 if (tc_bus
[slot
].flags
& IN_USE
) {
61 printk("claim_tc_card: attempting to claim a card already in use\n");
64 tc_bus
[slot
].flags
&= ~FREE
;
65 tc_bus
[slot
].flags
|= IN_USE
;
68 void release_tc_card(int slot
)
70 if (tc_bus
[slot
].flags
& FREE
) {
71 printk("release_tc_card: attempting to release a card already free\n");
74 tc_bus
[slot
].flags
&= ~IN_USE
;
75 tc_bus
[slot
].flags
|= FREE
;
78 unsigned long get_tc_base_addr(int slot
)
80 return tc_bus
[slot
].base_addr
;
83 unsigned long get_tc_irq_nr(int slot
)
85 return tc_bus
[slot
].interrupt
;
88 unsigned long get_tc_speed(void)
90 return 100000 * (10000 / (unsigned long)info
->clk_period
);
94 * Probing for TURBOchannel modules
96 static void __init
my_dbe_handler(struct pt_regs
*regs
)
101 static void __init
tc_probe(unsigned long startaddr
, unsigned long size
, int max_slot
)
105 unsigned char *module
;
106 void (*old_be_handler
)(struct pt_regs
*regs
);
108 /* Install our exception handler temporarily */
110 old_be_handler
= dbe_board_handler
;
111 dbe_board_handler
= my_dbe_handler
;
112 for (slot
= 0; slot
<= max_slot
; slot
++) {
113 module
= (char *)(startaddr
+ slot
* size
);
115 if (module
[OLDCARD
+ PATTERN0
] == 0x55 && module
[OLDCARD
+ PATTERN1
] == 0x00
116 && module
[OLDCARD
+ PATTERN2
] == 0xaa && module
[OLDCARD
+ PATTERN3
] == 0xff)
118 if (module
[PATTERN0
] == 0x55 && module
[PATTERN1
] == 0x00
119 && module
[PATTERN2
] == 0xaa && module
[PATTERN3
] == 0xff)
123 tc_bus
[slot
].base_addr
= (unsigned long)module
;
124 for(i
= 0; i
< 8; i
++) {
125 tc_bus
[slot
].firmware
[i
] = module
[FIRM_VER
+ offset
+ 4 * i
];
126 tc_bus
[slot
].vendor
[i
] = module
[VENDOR
+ offset
+ 4 * i
];
127 tc_bus
[slot
].name
[i
] = module
[MODULE
+ offset
+ 4 * i
];
129 tc_bus
[slot
].firmware
[8] = 0;
130 tc_bus
[slot
].vendor
[8] = 0;
131 tc_bus
[slot
].name
[8] = 0;
133 * Looks unneccesary, but we may change
138 tc_bus
[slot
].interrupt
= TC0
;
141 tc_bus
[slot
].interrupt
= TC1
;
144 tc_bus
[slot
].interrupt
= TC2
;
147 * Yuck! DS5000/200 onboard devices
150 tc_bus
[slot
].interrupt
= SCSI_INT
;
153 tc_bus
[slot
].interrupt
= ETHER
;
156 tc_bus
[slot
].interrupt
= -1;
162 dbe_board_handler
= old_be_handler
;
168 void __init
tc_init(void)
172 unsigned long slot0addr
;
173 unsigned long slot_size
;
178 for (i
= 0; i
< MAX_SLOT
; i
++) {
179 tc_bus
[i
].base_addr
= 0;
180 tc_bus
[i
].name
[0] = 0;
181 tc_bus
[i
].vendor
[0] = 0;
182 tc_bus
[i
].firmware
[0] = 0;
183 tc_bus
[i
].interrupt
= -1;
184 tc_bus
[i
].flags
= FREE
;
187 info
= (tcinfo
*) rex_gettcinfo();
188 slot0addr
= (unsigned long)KSEG1ADDR(rex_slot_address(0));
190 switch (mips_machtype
) {
191 case MACH_DS5000_200
:
194 case MACH_DS5000_1XX
:
195 case MACH_DS5000_2X0
:
204 tc_clock
= 10000 / info
->clk_period
;
206 if (TURBOCHANNEL
&& info
->slot_size
&& slot0addr
) {
207 printk("TURBOchannel rev. %1d at %2d.%1d MHz ", info
->revision
,
208 tc_clock
/ 10, tc_clock
% 10);
209 printk("(%sparity)\n", info
->parity
? "" : "no ");
211 slot_size
= info
->slot_size
<< 20;
213 tc_probe(slot0addr
, slot_size
, max_tcslot
);
216 * All TURBOchannel DECstations have the onboard devices
217 * where the (max_tcslot + 1 or 2 on DS5k/xx) Option Module
220 if(mips_machtype
== MACH_DS5000_XX
)
225 system_base
= slot0addr
+ slot_size
* (max_tcslot
+ i
);
228 for (i
= 0; i
<= max_tcslot
; i
++)
229 if (tc_bus
[i
].base_addr
) {
230 printk(" slot %d: ", i
);
231 printk("%s %s %s\n", tc_bus
[i
].vendor
,
232 tc_bus
[i
].name
, tc_bus
[i
].firmware
);
235 ioport_resource
.end
= KSEG2
- 1;