aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sh/boards/mach-microdev/io.c
blob: 2960c659020ee92e6c60c5c1d16d8d05ab73e267 (plain) (blame)
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
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
/*
 * linux/arch/sh/boards/superh/microdev/io.c
 *
 * Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com)
 * Copyright (C) 2003, 2004 SuperH, Inc.
 * Copyright (C) 2004 Paul Mundt
 *
 * SuperH SH4-202 MicroDev board support.
 *
 * May be copied or modified under the terms of the GNU General Public
 * License.  See linux/COPYING for more information.
 */

#include <linux/init.h>
#include <linux/pci.h>
#include <linux/wait.h>
#include <asm/io.h>
#include <mach/microdev.h>

	/*
	 *	we need to have a 'safe' address to re-direct all I/O requests
	 *	that we do not explicitly wish to handle. This safe address
	 *	must have the following properies:
	 *
	 *		* writes are ignored (no exception)
	 *		* reads are benign (no side-effects)
	 *		* accesses of width 1, 2 and 4-bytes are all valid.
	 *
	 *	The Processor Version Register (PVR) has these properties.
	 */
#define	PVR	0xff000030	/* Processor Version Register */


#define	IO_IDE2_BASE		0x170ul	/* I/O base for SMSC FDC37C93xAPM IDE #2 */
#define	IO_IDE1_BASE		0x1f0ul	/* I/O base for SMSC FDC37C93xAPM IDE #1 */
#define IO_ISP1161_BASE		0x290ul /* I/O port for Philips ISP1161x USB chip */
#define IO_SERIAL2_BASE		0x2f8ul /* I/O base for SMSC FDC37C93xAPM Serial #2 */
#define	IO_LAN91C111_BASE	0x300ul	/* I/O base for SMSC LAN91C111 Ethernet chip */
#define	IO_IDE2_MISC		0x376ul	/* I/O misc for SMSC FDC37C93xAPM IDE #2 */
#define IO_SUPERIO_BASE		0x3f0ul /* I/O base for SMSC FDC37C93xAPM SuperIO chip */
#define	IO_IDE1_MISC		0x3f6ul	/* I/O misc for SMSC FDC37C93xAPM IDE #1 */
#define IO_SERIAL1_BASE		0x3f8ul /* I/O base for SMSC FDC37C93xAPM Serial #1 */

#define	IO_ISP1161_EXTENT	0x04ul	/* I/O extent for Philips ISP1161x USB chip */
#define	IO_LAN91C111_EXTENT	0x10ul	/* I/O extent for SMSC LAN91C111 Ethernet chip */
#define	IO_SUPERIO_EXTENT	0x02ul	/* I/O extent for SMSC FDC37C93xAPM SuperIO chip */
#define	IO_IDE_EXTENT		0x08ul	/* I/O extent for IDE Task Register set */
#define IO_SERIAL_EXTENT	0x10ul

#define	IO_LAN91C111_PHYS	0xa7500000ul	/* Physical address of SMSC LAN91C111 Ethernet chip */
#define	IO_ISP1161_PHYS		0xa7700000ul	/* Physical address of Philips ISP1161x USB chip */
#define	IO_SUPERIO_PHYS		0xa7800000ul	/* Physical address of SMSC FDC37C93xAPM SuperIO chip */

/*
 * map I/O ports to memory-mapped addresses
 */
static unsigned long microdev_isa_port2addr(unsigned long offset)
{
	unsigned long result;

	if ((offset >= IO_LAN91C111_BASE) &&
	    (offset <  IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) {
			/*
			 *	SMSC LAN91C111 Ethernet chip
			 */
		result = IO_LAN91C111_PHYS + offset - IO_LAN91C111_BASE;
	} else if ((offset >= IO_SUPERIO_BASE) &&
		   (offset <  IO_SUPERIO_BASE + IO_SUPERIO_EXTENT)) {
			/*
			 *	SMSC FDC37C93xAPM SuperIO chip
			 *
			 *	Configuration Registers
			 */
		result = IO_SUPERIO_PHYS + (offset << 1);
#if 0
	} else if (offset == KBD_DATA_REG || offset == KBD_CNTL_REG ||
		   offset == KBD_STATUS_REG) {
			/*
			 *	SMSC FDC37C93xAPM SuperIO chip
			 *
			 *	PS/2 Keyboard + Mouse (ports 0x60 and 0x64).
			 */
	        result = IO_SUPERIO_PHYS + (offset << 1);
#endif
	} else if (((offset >= IO_IDE1_BASE) &&
		    (offset <  IO_IDE1_BASE + IO_IDE_EXTENT)) ||
		    (offset == IO_IDE1_MISC)) {
			/*
			 *	SMSC FDC37C93xAPM SuperIO chip
			 *
			 *	IDE #1
			 */
	        result = IO_SUPERIO_PHYS + (offset << 1);
	} else if (((offset >= IO_IDE2_BASE) &&
		    (offset <  IO_IDE2_BASE + IO_IDE_EXTENT)) ||
		    (offset == IO_IDE2_MISC)) {
			/*
			 *	SMSC FDC37C93xAPM SuperIO chip
			 *
			 *	IDE #2
			 */
	        result = IO_SUPERIO_PHYS + (offset << 1);
	} else if ((offset >= IO_SERIAL1_BASE) &&
		   (offset <  IO_SERIAL1_BASE + IO_SERIAL_EXTENT)) {
			/*
			 *	SMSC FDC37C93xAPM SuperIO chip
			 *
			 *	Serial #1
			 */
		result = IO_SUPERIO_PHYS + (offset << 1);
	} else if ((offset >= IO_SERIAL2_BASE) &&
		   (offset <  IO_SERIAL2_BASE + IO_SERIAL_EXTENT)) {
			/*
			 *	SMSC FDC37C93xAPM SuperIO chip
			 *
			 *	Serial #2
			 */
		result = IO_SUPERIO_PHYS + (offset << 1);
	} else if ((offset >= IO_ISP1161_BASE) &&
		   (offset < IO_ISP1161_BASE + IO_ISP1161_EXTENT)) {
			/*
			 *	Philips USB ISP1161x chip
			 */
		result = IO_ISP1161_PHYS + offset - IO_ISP1161_BASE;
	} else {
			/*
			 *	safe default.
			 */
		printk("Warning: unexpected port in %s( offset = 0x%lx )\n",
		       __func__, offset);
		result = PVR;
	}

	return result;
}

#define PORT2ADDR(x) (microdev_isa_port2addr(x))

static inline void delay(void)
{
#if defined(CONFIG_PCI)
	/* System board present, just make a dummy SRAM access.  (CS0 will be
	   mapped to PCI memory, probably good to avoid it.) */
	__raw_readw(0xa6800000);
#else
	/* CS0 will be mapped to flash, ROM etc so safe to access it. */
	__raw_readw(0xa0000000);
#endif
}

unsigned char microdev_inb(unsigned long port)
{
#ifdef CONFIG_PCI
	if (port >= PCIBIOS_MIN_IO)
		return microdev_pci_inb(port);
#endif
	return *(volatile unsigned char*)PORT2ADDR(port);
}

unsigned short microdev_inw(unsigned long port)
{
#ifdef CONFIG_PCI
	if (port >= PCIBIOS_MIN_IO)
		return microdev_pci_inw(port);
#endif
	return *(volatile unsigned short*)PORT2ADDR(port);
}

unsigned int microdev_inl(unsigned long port)
{
#ifdef CONFIG_PCI
	if (port >= PCIBIOS_MIN_IO)
		return microdev_pci_inl(port);
#endif
	return *(volatile unsigned int*)PORT2ADDR(port);
}

void microdev_outw(unsigned short b, unsigned long port)
{
#ifdef CONFIG_PCI
	if (port >= PCIBIOS_MIN_IO) {
		microdev_pci_outw(b, port);
		return;
	}
#endif
	*(volatile unsigned short*)PORT2ADDR(port) = b;
}

void microdev_outb(unsigned char b, unsigned long port)
{
#ifdef CONFIG_PCI
	if (port >= PCIBIOS_MIN_IO) {
		microdev_pci_outb(b, port);
		return;
	}
#endif

	/*
	 *	There is a board feature with the current SH4-202 MicroDev in
	 *	that the 2 byte enables (nBE0 and nBE1) are tied together (and
	 *	to the Chip Select Line (Ethernet_CS)). Due to this connectivity,
	 *	it is not possible to safely perform 8-bit writes to the
	 *	Ethernet registers, as 16-bits will be consumed from the Data
	 *	lines (corrupting the other byte).  Hence, this function is
	 *	written to implement 16-bit read/modify/write for all byte-wide
	 *	accesses.
	 *
	 *	Note: there is no problem with byte READS (even or odd).
	 *
	 *			Sean McGoogan - 16th June 2003.
	 */
	if ((port >= IO_LAN91C111_BASE) &&
	    (port <  IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) {
			/*
			 * Then are trying to perform a byte-write to the
			 * LAN91C111.  This needs special care.
			 */
		if (port % 2 == 1) {	/* is the port odd ? */
			/* unset bit-0, i.e. make even */
			const unsigned long evenPort = port-1;
			unsigned short word;

			/*
			 * do a 16-bit read/write to write to 'port',
			 * preserving even byte.
			 *
			 *	Even addresses are bits 0-7
			 *	Odd  addresses are bits 8-15
			 */
			word = microdev_inw(evenPort);
			word = (word & 0xffu) | (b << 8);
			microdev_outw(word, evenPort);
		} else {
			/* else, we are trying to do an even byte write */
			unsigned short word;

			/*
			 * do a 16-bit read/write to write to 'port',
			 * preserving odd byte.
			 *
			 *	Even addresses are bits 0-7
			 *	Odd  addresses are bits 8-15
			 */
			word = microdev_inw(port);
			word = (word & 0xff00u) | (b);
			microdev_outw(word, port);
		}
	} else {
		*(volatile unsigned char*)PORT2ADDR(port) = b;
	}
}

void microdev_outl(unsigned int b, unsigned long port)
{
#ifdef CONFIG_PCI
	if (port >= PCIBIOS_MIN_IO) {
		microdev_pci_outl(b, port);
		return;
	}
#endif
	*(volatile unsigned int*)PORT2ADDR(port) = b;
}

unsigned char microdev_inb_p(unsigned long port)
{
	unsigned char v = microdev_inb(port);
	delay();
	return v;
}

unsigned short microdev_inw_p(unsigned long port)
{
	unsigned short v = microdev_inw(port);
	delay();
	return v;
}

unsigned int microdev_inl_p(unsigned long port)
{
	unsigned int v = microdev_inl(port);
	delay();
	return v;
}

void microdev_outb_p(unsigned char b, unsigned long port)
{
	microdev_outb(b, port);
	delay();
}

void microdev_outw_p(unsigned short b, unsigned long port)
{
	microdev_outw(b, port);
	delay();
}

void microdev_outl_p(unsigned int b, unsigned long port)
{
	microdev_outl(b, port);
	delay();
}

void microdev_insb(unsigned long port, void *buffer, unsigned long count)
{
	volatile unsigned char *port_addr;
	unsigned char *buf = buffer;

	port_addr = (volatile unsigned char *)PORT2ADDR(port);

	while (count--)
		*buf++ = *port_addr;
}

void microdev_insw(unsigned long port, void *buffer, unsigned long count)
{
	volatile unsigned short *port_addr;
	unsigned short *buf = buffer;

	port_addr = (volatile unsigned short *)PORT2ADDR(port);

	while (count--)
		*buf++ = *port_addr;
}

void microdev_insl(unsigned long port, void *buffer, unsigned long count)
{
	volatile unsigned long *port_addr;
	unsigned int *buf = buffer;

	port_addr = (volatile unsigned long *)PORT2ADDR(port);

	while (count--)
		*buf++ = *port_addr;
}

void microdev_outsb(unsigned long port, const void *buffer, unsigned long count)
{
	volatile unsigned char *port_addr;
	const unsigned char *buf = buffer;

	port_addr = (volatile unsigned char *)PORT2ADDR(port);

	while (count--)
		*port_addr = *buf++;
}

void microdev_outsw(unsigned long port, const void *buffer, unsigned long count)
{
	volatile unsigned short *port_addr;
	const unsigned short *buf = buffer;

	port_addr = (volatile unsigned short *)PORT2ADDR(port);

	while (count--)
		*port_addr = *buf++;
}

void microdev_outsl(unsigned long port, const void *buffer, unsigned long count)
{
	volatile unsigned long *port_addr;
	const unsigned int *buf = buffer;

	port_addr = (volatile unsigned long *)PORT2ADDR(port);

	while (count--)
		*port_addr = *buf++;
}