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io.c
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1 /*
2  * linux/arch/m32r/platforms/m32104ut/io.c
3  *
4  * Typical I/O routines for M32104UT board.
5  *
6  * Copyright (c) 2001-2005 Hiroyuki Kondo, Hirokazu Takata,
7  * Hitoshi Yamamoto, Mamoru Sakugawa,
8  * Naoto Sugai, Hayato Fujiwara
9  */
10 
11 #include <asm/m32r.h>
12 #include <asm/page.h>
13 #include <asm/io.h>
14 #include <asm/byteorder.h>
15 
16 #if defined(CONFIG_PCMCIA) && defined(CONFIG_M32R_CFC)
17 #include <linux/types.h>
18 
19 #define M32R_PCC_IOMAP_SIZE 0x1000
20 
21 #define M32R_PCC_IOSTART0 0x1000
22 #define M32R_PCC_IOEND0 (M32R_PCC_IOSTART0 + M32R_PCC_IOMAP_SIZE - 1)
23 
24 extern void pcc_ioread_byte(int, unsigned long, void *, size_t, size_t, int);
25 extern void pcc_ioread_word(int, unsigned long, void *, size_t, size_t, int);
26 extern void pcc_iowrite_byte(int, unsigned long, void *, size_t, size_t, int);
27 extern void pcc_iowrite_word(int, unsigned long, void *, size_t, size_t, int);
28 #endif /* CONFIG_PCMCIA && CONFIG_M32R_CFC */
29 
30 #define PORT2ADDR(port) _port2addr(port)
31 
32 static inline void *_port2addr(unsigned long port)
33 {
34  return (void *)(port | NONCACHE_OFFSET);
35 }
36 
37 #if defined(CONFIG_IDE) && !defined(CONFIG_M32R_CFC)
38 static inline void *__port2addr_ata(unsigned long port)
39 {
40  static int dummy_reg;
41 
42  switch (port) {
43  case 0x1f0: return (void *)(0x0c002000 | NONCACHE_OFFSET);
44  case 0x1f1: return (void *)(0x0c012800 | NONCACHE_OFFSET);
45  case 0x1f2: return (void *)(0x0c012002 | NONCACHE_OFFSET);
46  case 0x1f3: return (void *)(0x0c012802 | NONCACHE_OFFSET);
47  case 0x1f4: return (void *)(0x0c012004 | NONCACHE_OFFSET);
48  case 0x1f5: return (void *)(0x0c012804 | NONCACHE_OFFSET);
49  case 0x1f6: return (void *)(0x0c012006 | NONCACHE_OFFSET);
50  case 0x1f7: return (void *)(0x0c012806 | NONCACHE_OFFSET);
51  case 0x3f6: return (void *)(0x0c01200e | NONCACHE_OFFSET);
52  default: return (void *)&dummy_reg;
53  }
54 }
55 #endif
56 
57 /*
58  * M32104T-LAN is located in the extended bus space
59  * from 0x01000000 to 0x01ffffff on physical address.
60  * The base address of LAN controller(LAN91C111) is 0x300.
61  */
62 #define LAN_IOSTART (0x300 | NONCACHE_OFFSET)
63 #define LAN_IOEND (0x320 | NONCACHE_OFFSET)
64 static inline void *_port2addr_ne(unsigned long port)
65 {
66  return (void *)(port + NONCACHE_OFFSET + 0x01000000);
67 }
68 
69 static inline void delay(void)
70 {
71  __asm__ __volatile__ ("push r0; \n\t pop r0;" : : :"memory");
72 }
73 
74 /*
75  * NIC I/O function
76  */
77 
78 #define PORT2ADDR_NE(port) _port2addr_ne(port)
79 
80 static inline unsigned char _ne_inb(void *portp)
81 {
82  return *(volatile unsigned char *)portp;
83 }
84 
85 static inline unsigned short _ne_inw(void *portp)
86 {
87  return (unsigned short)le16_to_cpu(*(volatile unsigned short *)portp);
88 }
89 
90 static inline void _ne_insb(void *portp, void *addr, unsigned long count)
91 {
92  unsigned char *buf = (unsigned char *)addr;
93 
94  while (count--)
95  *buf++ = _ne_inb(portp);
96 }
97 
98 static inline void _ne_outb(unsigned char b, void *portp)
99 {
100  *(volatile unsigned char *)portp = b;
101 }
102 
103 static inline void _ne_outw(unsigned short w, void *portp)
104 {
105  *(volatile unsigned short *)portp = cpu_to_le16(w);
106 }
107 
108 unsigned char _inb(unsigned long port)
109 {
110  if (port >= LAN_IOSTART && port < LAN_IOEND)
111  return _ne_inb(PORT2ADDR_NE(port));
112 
113  return *(volatile unsigned char *)PORT2ADDR(port);
114 }
115 
116 unsigned short _inw(unsigned long port)
117 {
118  if (port >= LAN_IOSTART && port < LAN_IOEND)
119  return _ne_inw(PORT2ADDR_NE(port));
120 
121  return *(volatile unsigned short *)PORT2ADDR(port);
122 }
123 
124 unsigned long _inl(unsigned long port)
125 {
126  return *(volatile unsigned long *)PORT2ADDR(port);
127 }
128 
129 unsigned char _inb_p(unsigned long port)
130 {
131  unsigned char v = _inb(port);
132  delay();
133  return (v);
134 }
135 
136 unsigned short _inw_p(unsigned long port)
137 {
138  unsigned short v = _inw(port);
139  delay();
140  return (v);
141 }
142 
143 unsigned long _inl_p(unsigned long port)
144 {
145  unsigned long v = _inl(port);
146  delay();
147  return (v);
148 }
149 
150 void _outb(unsigned char b, unsigned long port)
151 {
152  if (port >= LAN_IOSTART && port < LAN_IOEND)
153  _ne_outb(b, PORT2ADDR_NE(port));
154  else
155  *(volatile unsigned char *)PORT2ADDR(port) = b;
156 }
157 
158 void _outw(unsigned short w, unsigned long port)
159 {
160  if (port >= LAN_IOSTART && port < LAN_IOEND)
161  _ne_outw(w, PORT2ADDR_NE(port));
162  else
163  *(volatile unsigned short *)PORT2ADDR(port) = w;
164 }
165 
166 void _outl(unsigned long l, unsigned long port)
167 {
168  *(volatile unsigned long *)PORT2ADDR(port) = l;
169 }
170 
171 void _outb_p(unsigned char b, unsigned long port)
172 {
173  _outb(b, port);
174  delay();
175 }
176 
177 void _outw_p(unsigned short w, unsigned long port)
178 {
179  _outw(w, port);
180  delay();
181 }
182 
183 void _outl_p(unsigned long l, unsigned long port)
184 {
185  _outl(l, port);
186  delay();
187 }
188 
189 void _insb(unsigned int port, void *addr, unsigned long count)
190 {
191  if (port >= LAN_IOSTART && port < LAN_IOEND)
192  _ne_insb(PORT2ADDR_NE(port), addr, count);
193  else {
194  unsigned char *buf = addr;
195  unsigned char *portp = PORT2ADDR(port);
196  while (count--)
197  *buf++ = *(volatile unsigned char *)portp;
198  }
199 }
200 
201 void _insw(unsigned int port, void *addr, unsigned long count)
202 {
203  unsigned short *buf = addr;
204  unsigned short *portp;
205 
206  if (port >= LAN_IOSTART && port < LAN_IOEND) {
207  /*
208  * This portion is only used by smc91111.c to read data
209  * from the DATA_REG. Do not swap the data.
210  */
211  portp = PORT2ADDR_NE(port);
212  while (count--)
213  *buf++ = *(volatile unsigned short *)portp;
214 #if defined(CONFIG_PCMCIA) && defined(CONFIG_M32R_CFC)
215  } else if (port >= M32R_PCC_IOSTART0 && port <= M32R_PCC_IOEND0) {
216  pcc_ioread_word(9, port, (void *)addr, sizeof(unsigned short),
217  count, 1);
218 #endif
219 #if defined(CONFIG_IDE) && !defined(CONFIG_M32R_CFC)
220  } else if ((port >= 0x1f0 && port <=0x1f7) || port == 0x3f6) {
221  portp = __port2addr_ata(port);
222  while (count--)
223  *buf++ = *(volatile unsigned short *)portp;
224 #endif
225  } else {
226  portp = PORT2ADDR(port);
227  while (count--)
228  *buf++ = *(volatile unsigned short *)portp;
229  }
230 }
231 
232 void _insl(unsigned int port, void *addr, unsigned long count)
233 {
234  unsigned long *buf = addr;
235  unsigned long *portp;
236 
237  portp = PORT2ADDR(port);
238  while (count--)
239  *buf++ = *(volatile unsigned long *)portp;
240 }
241 
242 void _outsb(unsigned int port, const void *addr, unsigned long count)
243 {
244  const unsigned char *buf = addr;
245  unsigned char *portp;
246 
247  if (port >= LAN_IOSTART && port < LAN_IOEND) {
248  portp = PORT2ADDR_NE(port);
249  while (count--)
250  _ne_outb(*buf++, portp);
251  } else {
252  portp = PORT2ADDR(port);
253  while (count--)
254  *(volatile unsigned char *)portp = *buf++;
255  }
256 }
257 
258 void _outsw(unsigned int port, const void *addr, unsigned long count)
259 {
260  const unsigned short *buf = addr;
261  unsigned short *portp;
262 
263  if (port >= LAN_IOSTART && port < LAN_IOEND) {
264  /*
265  * This portion is only used by smc91111.c to write data
266  * into the DATA_REG. Do not swap the data.
267  */
268  portp = PORT2ADDR_NE(port);
269  while (count--)
270  *(volatile unsigned short *)portp = *buf++;
271 #if defined(CONFIG_IDE) && !defined(CONFIG_M32R_CFC)
272  } else if ((port >= 0x1f0 && port <=0x1f7) || port == 0x3f6) {
273  portp = __port2addr_ata(port);
274  while (count--)
275  *(volatile unsigned short *)portp = *buf++;
276 #endif
277 #if defined(CONFIG_PCMCIA) && defined(CONFIG_M32R_CFC)
278  } else if (port >= M32R_PCC_IOSTART0 && port <= M32R_PCC_IOEND0) {
279  pcc_iowrite_word(9, port, (void *)addr, sizeof(unsigned short),
280  count, 1);
281 #endif
282  } else {
283  portp = PORT2ADDR(port);
284  while (count--)
285  *(volatile unsigned short *)portp = *buf++;
286  }
287 }
288 
289 void _outsl(unsigned int port, const void *addr, unsigned long count)
290 {
291  const unsigned long *buf = addr;
292  unsigned char *portp;
293 
294  portp = PORT2ADDR(port);
295  while (count--)
296  *(volatile unsigned long *)portp = *buf++;
297 }