aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sh/cchips/hd6446x/hd64465/io.c
blob: 58704d066ae2d0931049b749aadfe49aed6a748f (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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
/*
 * $Id: io.c,v 1.4 2003/08/03 03:05:10 lethal Exp $
 * by Greg Banks <gbanks@pocketpenguins.com>
 * (c) 2000 PocketPenguins Inc
 *
 * Derived from io_hd64461.c, which bore the message:
 * Copyright (C) 2000 YAEGASHI Takeshi
 *
 * Typical I/O routines for HD64465 system.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <asm/io.h>
#include <asm/hd64465/hd64465.h>


#define HD64465_DEBUG 0

#if HD64465_DEBUG
#define DPRINTK(args...)	printk(args)
#define DIPRINTK(n, args...)	if (hd64465_io_debug>(n)) printk(args)
#else
#define DPRINTK(args...)
#define DIPRINTK(n, args...)
#endif



/* This is a hack suitable only for debugging IO port problems */
int hd64465_io_debug;
EXPORT_SYMBOL(hd64465_io_debug);

/* Low iomap maps port 0-1K to addresses in 8byte chunks */
#define HD64465_IOMAP_LO_THRESH 0x400
#define HD64465_IOMAP_LO_SHIFT	3
#define HD64465_IOMAP_LO_MASK	((1<<HD64465_IOMAP_LO_SHIFT)-1)
#define HD64465_IOMAP_LO_NMAP	(HD64465_IOMAP_LO_THRESH>>HD64465_IOMAP_LO_SHIFT)
static unsigned long	hd64465_iomap_lo[HD64465_IOMAP_LO_NMAP];
static unsigned char	hd64465_iomap_lo_shift[HD64465_IOMAP_LO_NMAP];

/* High iomap maps port 1K-64K to addresses in 1K chunks */
#define HD64465_IOMAP_HI_THRESH 0x10000
#define HD64465_IOMAP_HI_SHIFT	10
#define HD64465_IOMAP_HI_MASK	((1<<HD64465_IOMAP_HI_SHIFT)-1)
#define HD64465_IOMAP_HI_NMAP	(HD64465_IOMAP_HI_THRESH>>HD64465_IOMAP_HI_SHIFT)
static unsigned long	hd64465_iomap_hi[HD64465_IOMAP_HI_NMAP];
static unsigned char	hd64465_iomap_hi_shift[HD64465_IOMAP_HI_NMAP];

#define PORT2ADDR(x) (sh_mv.mv_isa_port2addr(x))

void hd64465_port_map(unsigned short baseport, unsigned int nports,
		      unsigned long addr, unsigned char shift)
{
    	unsigned int port, endport = baseport + nports;

    	DPRINTK("hd64465_port_map(base=0x%04hx, n=0x%04hx, addr=0x%08lx,endport=0x%04x)\n",
	    baseport, nports, addr,endport);
	    
	for (port = baseport ;
	     port < endport && port < HD64465_IOMAP_LO_THRESH ;
	     port += (1<<HD64465_IOMAP_LO_SHIFT)) {
	    DPRINTK("    maplo[0x%x] = 0x%08lx\n", port, addr);
    	    hd64465_iomap_lo[port>>HD64465_IOMAP_LO_SHIFT] = addr;
    	    hd64465_iomap_lo_shift[port>>HD64465_IOMAP_LO_SHIFT] = shift;
	    addr += (1<<(HD64465_IOMAP_LO_SHIFT));
	}

	for (port = max_t(unsigned int, baseport, HD64465_IOMAP_LO_THRESH);
	     port < endport && port < HD64465_IOMAP_HI_THRESH ;
	     port += (1<<HD64465_IOMAP_HI_SHIFT)) {
	    DPRINTK("    maphi[0x%x] = 0x%08lx\n", port, addr);
    	    hd64465_iomap_hi[port>>HD64465_IOMAP_HI_SHIFT] = addr;
    	    hd64465_iomap_hi_shift[port>>HD64465_IOMAP_HI_SHIFT] = shift;
	    addr += (1<<(HD64465_IOMAP_HI_SHIFT));
	}
}
EXPORT_SYMBOL(hd64465_port_map);

void hd64465_port_unmap(unsigned short baseport, unsigned int nports)
{
    	unsigned int port, endport = baseport + nports;
	
    	DPRINTK("hd64465_port_unmap(base=0x%04hx, n=0x%04hx)\n",
	    baseport, nports);

	for (port = baseport ;
	     port < endport && port < HD64465_IOMAP_LO_THRESH ;
	     port += (1<<HD64465_IOMAP_LO_SHIFT)) {
    	    hd64465_iomap_lo[port>>HD64465_IOMAP_LO_SHIFT] = 0;
	}

	for (port = max_t(unsigned int, baseport, HD64465_IOMAP_LO_THRESH);
	     port < endport && port < HD64465_IOMAP_HI_THRESH ;
	     port += (1<<HD64465_IOMAP_HI_SHIFT)) {
    	    hd64465_iomap_hi[port>>HD64465_IOMAP_HI_SHIFT] = 0;
	}
}
EXPORT_SYMBOL(hd64465_port_unmap);

unsigned long hd64465_isa_port2addr(unsigned long port)
{
    	unsigned long addr = 0;
	unsigned char shift;

	/* handle remapping of low IO ports */
	if (port < HD64465_IOMAP_LO_THRESH) {
	    addr = hd64465_iomap_lo[port >> HD64465_IOMAP_LO_SHIFT];
	    shift = hd64465_iomap_lo_shift[port >> HD64465_IOMAP_LO_SHIFT];
	    if (addr != 0)
	    	addr += (port & HD64465_IOMAP_LO_MASK) << shift;
	    else
		printk(KERN_NOTICE "io_hd64465: access to un-mapped port %lx\n", port);
	} else if (port < HD64465_IOMAP_HI_THRESH) {
	    addr = hd64465_iomap_hi[port >> HD64465_IOMAP_HI_SHIFT];
	    shift = hd64465_iomap_hi_shift[port >> HD64465_IOMAP_HI_SHIFT];
	    if (addr != 0)
		addr += (port & HD64465_IOMAP_HI_MASK) << shift;
	    else
		printk(KERN_NOTICE "io_hd64465: access to un-mapped port %lx\n", port);
	}
	    	
	/* HD64465 internal devices (0xb0000000) */
	else if (port < 0x20000)
	    addr = CONFIG_HD64465_IOBASE + port - 0x10000;

	/* Whole physical address space (0xa0000000) */
	else
	    addr = P2SEGADDR(port);

    	DIPRINTK(2, "PORT2ADDR(0x%08lx) = 0x%08lx\n", port, addr);

	return addr;
}

static inline void delay(void)
{
	ctrl_inw(0xa0000000);
}

unsigned char hd64465_inb(unsigned long port)
{
	unsigned long addr = PORT2ADDR(port);
	unsigned long b = (addr == 0 ? 0 : *(volatile unsigned char*)addr);

	DIPRINTK(0, "inb(%08lx) = %02x\n", addr, (unsigned)b);
	return b;
}

unsigned char hd64465_inb_p(unsigned long port)
{
    	unsigned long v;
	unsigned long addr = PORT2ADDR(port);

	v = (addr == 0 ? 0 : *(volatile unsigned char*)addr);
	delay();
	DIPRINTK(0, "inb_p(%08lx) = %02x\n", addr, (unsigned)v);
	return v;
}

unsigned short hd64465_inw(unsigned long port)
{
    	unsigned long addr = PORT2ADDR(port);
	unsigned long b = (addr == 0 ? 0 : *(volatile unsigned short*)addr);
	DIPRINTK(0, "inw(%08lx) = %04lx\n", addr, b);
	return b;
}

unsigned int hd64465_inl(unsigned long port)
{
    	unsigned long addr = PORT2ADDR(port);
	unsigned int b = (addr == 0 ? 0 : *(volatile unsigned long*)addr);
	DIPRINTK(0, "inl(%08lx) = %08x\n", addr, b);
	return b;
}

void hd64465_outb(unsigned char b, unsigned long port)
{
	unsigned long addr = PORT2ADDR(port);

	DIPRINTK(0, "outb(%02x, %08lx)\n", (unsigned)b, addr);
	if (addr != 0)
	    *(volatile unsigned char*)addr = b;
}

void hd64465_outb_p(unsigned char b, unsigned long port)
{
	unsigned long addr = PORT2ADDR(port);

	DIPRINTK(0, "outb_p(%02x, %08lx)\n", (unsigned)b, addr);
    	if (addr != 0)
	    *(volatile unsigned char*)addr = b;
	delay();
}

void hd64465_outw(unsigned short b, unsigned long port)
{
	unsigned long addr = PORT2ADDR(port);
	DIPRINTK(0, "outw(%04x, %08lx)\n", (unsigned)b, addr);
	if (addr != 0)
	    *(volatile unsigned short*)addr = b;
}

void hd64465_outl(unsigned int b, unsigned long port)
{
	unsigned long addr = PORT2ADDR(port);
	DIPRINTK(0, "outl(%08x, %08lx)\n", b, addr);
	if (addr != 0)
            *(volatile unsigned long*)addr = b;
}