summaryrefslogtreecommitdiffstats
path: root/drivers/isdn/sc/shmem.c
blob: d24506ceb6e8764b4b19c775c68ead3334fbe18e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
/* $Id: shmem.c,v 1.2.10.1 2001/09/23 22:24:59 kai Exp $
 *
 * Copyright (C) 1996  SpellCaster Telecommunications Inc.
 *
 * Card functions implementing ISDN4Linux functionality
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 * For more information, please contact gpl-info@spellcast.com or write:
 *
 *     SpellCaster Telecommunications Inc.
 *     5621 Finch Avenue East, Unit #3
 *     Scarborough, Ontario  Canada
 *     M1B 2T9
 *     +1 (416) 297-8565
 *     +1 (416) 297-6433 Facsimile
 */

#include "includes.h"		/* This must be first */
#include "hardware.h"
#include "card.h"

/*
 *
 */
void memcpy_toshmem(int card, void *dest, const void *src, size_t n)
{
	unsigned long flags;
	unsigned char ch;
	unsigned long dest_rem = ((unsigned long) dest) % 0x4000;

	if (!IS_VALID_CARD(card)) {
		pr_debug("Invalid param: %d is not a valid card id\n", card);
		return;
	}

	if (n > SRAM_PAGESIZE)
		return;

	/*
	 * determine the page to load from the address
	 */
	ch = (unsigned long) dest / SRAM_PAGESIZE;
	pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename, ch);
	/*
	 * Block interrupts and load the page
	 */
	spin_lock_irqsave(&sc_adapter[card]->lock, flags);

	outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
	     sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
	memcpy_toio((void __iomem *)(sc_adapter[card]->rambase + dest_rem), src, n);
	spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
	pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
		 ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
	pr_debug("%s: copying %zu bytes from %#lx to %#lx\n",
		 sc_adapter[card]->devicename, n,
		 (unsigned long) src,
		 sc_adapter[card]->rambase + ((unsigned long) dest % 0x4000));
}

/*
 * Reverse of above
 */
void memcpy_fromshmem(int card, void *dest, const void *src, size_t n)
{
	unsigned long flags;
	unsigned char ch;

	if (!IS_VALID_CARD(card)) {
		pr_debug("Invalid param: %d is not a valid card id\n", card);
		return;
	}

	if (n > SRAM_PAGESIZE) {
		return;
	}

	/*
	 * determine the page to load from the address
	 */
	ch = (unsigned long) src / SRAM_PAGESIZE;
	pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename, ch);


	/*
	 * Block interrupts and load the page
	 */
	spin_lock_irqsave(&sc_adapter[card]->lock, flags);

	outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
	     sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
	memcpy_fromio(dest, (void *)(sc_adapter[card]->rambase +
				     ((unsigned long) src % 0x4000)), n);
	spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
	pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
		 ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
/*	pr_debug("%s: copying %d bytes from %#x to %#x\n",
	sc_adapter[card]->devicename, n,
	sc_adapter[card]->rambase + ((unsigned long) src %0x4000), (unsigned long) dest); */
}

#if 0
void memset_shmem(int card, void *dest, int c, size_t n)
{
	unsigned long flags;
	unsigned char ch;

	if (!IS_VALID_CARD(card)) {
		pr_debug("Invalid param: %d is not a valid card id\n", card);
		return;
	}

	if (n > SRAM_PAGESIZE) {
		return;
	}

	/*
	 * determine the page to load from the address
	 */
	ch = (unsigned long) dest / SRAM_PAGESIZE;
	pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename, ch);

	/*
	 * Block interrupts and load the page
	 */
	spin_lock_irqsave(&sc_adapter[card]->lock, flags);

	outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
	     sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
	memset_io(sc_adapter[card]->rambase +
		  ((unsigned long) dest % 0x4000), c, n);
	pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
		 ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
	spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
}
#endif  /*  0  */
OpenPOWER on IntegriCloud