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1da177e4 | 1 | /* |
f30c2269 | 2 | * linux/arch/sh/boards/superh/microdev/io.c |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com) | |
5 | * Copyright (C) 2003, 2004 SuperH, Inc. | |
6 | * Copyright (C) 2004 Paul Mundt | |
7 | * | |
8 | * SuperH SH4-202 MicroDev board support. | |
9 | * | |
10 | * May be copied or modified under the terms of the GNU General Public | |
11 | * License. See linux/COPYING for more information. | |
12 | */ | |
13 | ||
1da177e4 LT |
14 | #include <linux/init.h> |
15 | #include <linux/pci.h> | |
16 | #include <linux/wait.h> | |
17 | #include <asm/io.h> | |
74017294 | 18 | #include <asm/microdev.h> |
1da177e4 LT |
19 | |
20 | /* | |
21 | * we need to have a 'safe' address to re-direct all I/O requests | |
22 | * that we do not explicitly wish to handle. This safe address | |
23 | * must have the following properies: | |
24 | * | |
25 | * * writes are ignored (no exception) | |
26 | * * reads are benign (no side-effects) | |
27 | * * accesses of width 1, 2 and 4-bytes are all valid. | |
28 | * | |
29 | * The Processor Version Register (PVR) has these properties. | |
30 | */ | |
31 | #define PVR 0xff000030 /* Processor Version Register */ | |
32 | ||
33 | ||
34 | #define IO_IDE2_BASE 0x170ul /* I/O base for SMSC FDC37C93xAPM IDE #2 */ | |
35 | #define IO_IDE1_BASE 0x1f0ul /* I/O base for SMSC FDC37C93xAPM IDE #1 */ | |
36 | #define IO_ISP1161_BASE 0x290ul /* I/O port for Philips ISP1161x USB chip */ | |
37 | #define IO_SERIAL2_BASE 0x2f8ul /* I/O base for SMSC FDC37C93xAPM Serial #2 */ | |
38 | #define IO_LAN91C111_BASE 0x300ul /* I/O base for SMSC LAN91C111 Ethernet chip */ | |
39 | #define IO_IDE2_MISC 0x376ul /* I/O misc for SMSC FDC37C93xAPM IDE #2 */ | |
40 | #define IO_SUPERIO_BASE 0x3f0ul /* I/O base for SMSC FDC37C93xAPM SuperIO chip */ | |
41 | #define IO_IDE1_MISC 0x3f6ul /* I/O misc for SMSC FDC37C93xAPM IDE #1 */ | |
42 | #define IO_SERIAL1_BASE 0x3f8ul /* I/O base for SMSC FDC37C93xAPM Serial #1 */ | |
43 | ||
44 | #define IO_ISP1161_EXTENT 0x04ul /* I/O extent for Philips ISP1161x USB chip */ | |
45 | #define IO_LAN91C111_EXTENT 0x10ul /* I/O extent for SMSC LAN91C111 Ethernet chip */ | |
46 | #define IO_SUPERIO_EXTENT 0x02ul /* I/O extent for SMSC FDC37C93xAPM SuperIO chip */ | |
47 | #define IO_IDE_EXTENT 0x08ul /* I/O extent for IDE Task Register set */ | |
48 | #define IO_SERIAL_EXTENT 0x10ul | |
49 | ||
50 | #define IO_LAN91C111_PHYS 0xa7500000ul /* Physical address of SMSC LAN91C111 Ethernet chip */ | |
51 | #define IO_ISP1161_PHYS 0xa7700000ul /* Physical address of Philips ISP1161x USB chip */ | |
52 | #define IO_SUPERIO_PHYS 0xa7800000ul /* Physical address of SMSC FDC37C93xAPM SuperIO chip */ | |
53 | ||
74017294 PM |
54 | /* |
55 | * map I/O ports to memory-mapped addresses | |
56 | */ | |
57 | static unsigned long microdev_isa_port2addr(unsigned long offset) | |
58 | { | |
59 | unsigned long result; | |
60 | ||
61 | if ((offset >= IO_LAN91C111_BASE) && | |
62 | (offset < IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) { | |
63 | /* | |
64 | * SMSC LAN91C111 Ethernet chip | |
65 | */ | |
66 | result = IO_LAN91C111_PHYS + offset - IO_LAN91C111_BASE; | |
67 | } else if ((offset >= IO_SUPERIO_BASE) && | |
68 | (offset < IO_SUPERIO_BASE + IO_SUPERIO_EXTENT)) { | |
69 | /* | |
70 | * SMSC FDC37C93xAPM SuperIO chip | |
71 | * | |
72 | * Configuration Registers | |
73 | */ | |
74 | result = IO_SUPERIO_PHYS + (offset << 1); | |
75 | #if 0 | |
76 | } else if (offset == KBD_DATA_REG || offset == KBD_CNTL_REG || | |
77 | offset == KBD_STATUS_REG) { | |
78 | /* | |
79 | * SMSC FDC37C93xAPM SuperIO chip | |
80 | * | |
81 | * PS/2 Keyboard + Mouse (ports 0x60 and 0x64). | |
82 | */ | |
83 | result = IO_SUPERIO_PHYS + (offset << 1); | |
84 | #endif | |
85 | } else if (((offset >= IO_IDE1_BASE) && | |
86 | (offset < IO_IDE1_BASE + IO_IDE_EXTENT)) || | |
87 | (offset == IO_IDE1_MISC)) { | |
88 | /* | |
89 | * SMSC FDC37C93xAPM SuperIO chip | |
90 | * | |
91 | * IDE #1 | |
92 | */ | |
93 | result = IO_SUPERIO_PHYS + (offset << 1); | |
94 | } else if (((offset >= IO_IDE2_BASE) && | |
95 | (offset < IO_IDE2_BASE + IO_IDE_EXTENT)) || | |
96 | (offset == IO_IDE2_MISC)) { | |
97 | /* | |
98 | * SMSC FDC37C93xAPM SuperIO chip | |
99 | * | |
100 | * IDE #2 | |
101 | */ | |
102 | result = IO_SUPERIO_PHYS + (offset << 1); | |
103 | } else if ((offset >= IO_SERIAL1_BASE) && | |
104 | (offset < IO_SERIAL1_BASE + IO_SERIAL_EXTENT)) { | |
105 | /* | |
106 | * SMSC FDC37C93xAPM SuperIO chip | |
107 | * | |
108 | * Serial #1 | |
109 | */ | |
110 | result = IO_SUPERIO_PHYS + (offset << 1); | |
111 | } else if ((offset >= IO_SERIAL2_BASE) && | |
112 | (offset < IO_SERIAL2_BASE + IO_SERIAL_EXTENT)) { | |
113 | /* | |
114 | * SMSC FDC37C93xAPM SuperIO chip | |
115 | * | |
116 | * Serial #2 | |
117 | */ | |
118 | result = IO_SUPERIO_PHYS + (offset << 1); | |
119 | } else if ((offset >= IO_ISP1161_BASE) && | |
120 | (offset < IO_ISP1161_BASE + IO_ISP1161_EXTENT)) { | |
121 | /* | |
122 | * Philips USB ISP1161x chip | |
123 | */ | |
124 | result = IO_ISP1161_PHYS + offset - IO_ISP1161_BASE; | |
125 | } else { | |
126 | /* | |
127 | * safe default. | |
128 | */ | |
129 | printk("Warning: unexpected port in %s( offset = 0x%lx )\n", | |
130 | __FUNCTION__, offset); | |
131 | result = PVR; | |
132 | } | |
133 | ||
134 | return result; | |
135 | } | |
1da177e4 | 136 | |
74017294 | 137 | #define PORT2ADDR(x) (microdev_isa_port2addr(x)) |
1da177e4 LT |
138 | |
139 | static inline void delay(void) | |
140 | { | |
141 | #if defined(CONFIG_PCI) | |
142 | /* System board present, just make a dummy SRAM access. (CS0 will be | |
143 | mapped to PCI memory, probably good to avoid it.) */ | |
144 | ctrl_inw(0xa6800000); | |
145 | #else | |
146 | /* CS0 will be mapped to flash, ROM etc so safe to access it. */ | |
147 | ctrl_inw(0xa0000000); | |
148 | #endif | |
149 | } | |
150 | ||
151 | unsigned char microdev_inb(unsigned long port) | |
152 | { | |
153 | #ifdef CONFIG_PCI | |
154 | if (port >= PCIBIOS_MIN_IO) | |
155 | return microdev_pci_inb(port); | |
156 | #endif | |
157 | return *(volatile unsigned char*)PORT2ADDR(port); | |
158 | } | |
159 | ||
160 | unsigned short microdev_inw(unsigned long port) | |
161 | { | |
162 | #ifdef CONFIG_PCI | |
163 | if (port >= PCIBIOS_MIN_IO) | |
164 | return microdev_pci_inw(port); | |
165 | #endif | |
166 | return *(volatile unsigned short*)PORT2ADDR(port); | |
167 | } | |
168 | ||
169 | unsigned int microdev_inl(unsigned long port) | |
170 | { | |
171 | #ifdef CONFIG_PCI | |
172 | if (port >= PCIBIOS_MIN_IO) | |
173 | return microdev_pci_inl(port); | |
174 | #endif | |
175 | return *(volatile unsigned int*)PORT2ADDR(port); | |
176 | } | |
177 | ||
74017294 PM |
178 | void microdev_outw(unsigned short b, unsigned long port) |
179 | { | |
180 | #ifdef CONFIG_PCI | |
181 | if (port >= PCIBIOS_MIN_IO) { | |
182 | microdev_pci_outw(b, port); | |
183 | return; | |
184 | } | |
185 | #endif | |
186 | *(volatile unsigned short*)PORT2ADDR(port) = b; | |
187 | } | |
188 | ||
1da177e4 LT |
189 | void microdev_outb(unsigned char b, unsigned long port) |
190 | { | |
191 | #ifdef CONFIG_PCI | |
192 | if (port >= PCIBIOS_MIN_IO) { | |
193 | microdev_pci_outb(b, port); | |
194 | return; | |
195 | } | |
196 | #endif | |
197 | ||
198 | /* | |
199 | * There is a board feature with the current SH4-202 MicroDev in | |
200 | * that the 2 byte enables (nBE0 and nBE1) are tied together (and | |
201 | * to the Chip Select Line (Ethernet_CS)). Due to this conectivity, | |
202 | * it is not possible to safely perform 8-bit writes to the | |
203 | * Ethernet registers, as 16-bits will be consumed from the Data | |
204 | * lines (corrupting the other byte). Hence, this function is | |
205 | * written to impliment 16-bit read/modify/write for all byte-wide | |
206 | * acceses. | |
207 | * | |
208 | * Note: there is no problem with byte READS (even or odd). | |
209 | * | |
210 | * Sean McGoogan - 16th June 2003. | |
211 | */ | |
212 | if ((port >= IO_LAN91C111_BASE) && | |
213 | (port < IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) { | |
214 | /* | |
215 | * Then are trying to perform a byte-write to the | |
216 | * LAN91C111. This needs special care. | |
217 | */ | |
218 | if (port % 2 == 1) { /* is the port odd ? */ | |
219 | /* unset bit-0, i.e. make even */ | |
220 | const unsigned long evenPort = port-1; | |
221 | unsigned short word; | |
222 | ||
223 | /* | |
224 | * do a 16-bit read/write to write to 'port', | |
225 | * preserving even byte. | |
226 | * | |
227 | * Even addresses are bits 0-7 | |
228 | * Odd addresses are bits 8-15 | |
229 | */ | |
230 | word = microdev_inw(evenPort); | |
231 | word = (word & 0xffu) | (b << 8); | |
232 | microdev_outw(word, evenPort); | |
233 | } else { | |
234 | /* else, we are trying to do an even byte write */ | |
235 | unsigned short word; | |
236 | ||
237 | /* | |
238 | * do a 16-bit read/write to write to 'port', | |
239 | * preserving odd byte. | |
240 | * | |
241 | * Even addresses are bits 0-7 | |
242 | * Odd addresses are bits 8-15 | |
243 | */ | |
244 | word = microdev_inw(port); | |
245 | word = (word & 0xff00u) | (b); | |
246 | microdev_outw(word, port); | |
247 | } | |
248 | } else { | |
249 | *(volatile unsigned char*)PORT2ADDR(port) = b; | |
250 | } | |
251 | } | |
252 | ||
1da177e4 LT |
253 | void microdev_outl(unsigned int b, unsigned long port) |
254 | { | |
255 | #ifdef CONFIG_PCI | |
256 | if (port >= PCIBIOS_MIN_IO) { | |
257 | microdev_pci_outl(b, port); | |
258 | return; | |
259 | } | |
260 | #endif | |
261 | *(volatile unsigned int*)PORT2ADDR(port) = b; | |
262 | } | |
263 | ||
264 | unsigned char microdev_inb_p(unsigned long port) | |
265 | { | |
266 | unsigned char v = microdev_inb(port); | |
267 | delay(); | |
268 | return v; | |
269 | } | |
270 | ||
271 | unsigned short microdev_inw_p(unsigned long port) | |
272 | { | |
273 | unsigned short v = microdev_inw(port); | |
274 | delay(); | |
275 | return v; | |
276 | } | |
277 | ||
278 | unsigned int microdev_inl_p(unsigned long port) | |
279 | { | |
280 | unsigned int v = microdev_inl(port); | |
281 | delay(); | |
282 | return v; | |
283 | } | |
284 | ||
285 | void microdev_outb_p(unsigned char b, unsigned long port) | |
286 | { | |
287 | microdev_outb(b, port); | |
288 | delay(); | |
289 | } | |
290 | ||
291 | void microdev_outw_p(unsigned short b, unsigned long port) | |
292 | { | |
293 | microdev_outw(b, port); | |
294 | delay(); | |
295 | } | |
296 | ||
297 | void microdev_outl_p(unsigned int b, unsigned long port) | |
298 | { | |
299 | microdev_outl(b, port); | |
300 | delay(); | |
301 | } | |
302 | ||
303 | void microdev_insb(unsigned long port, void *buffer, unsigned long count) | |
304 | { | |
305 | volatile unsigned char *port_addr; | |
306 | unsigned char *buf = buffer; | |
307 | ||
308 | port_addr = (volatile unsigned char *)PORT2ADDR(port); | |
309 | ||
310 | while (count--) | |
311 | *buf++ = *port_addr; | |
312 | } | |
313 | ||
314 | void microdev_insw(unsigned long port, void *buffer, unsigned long count) | |
315 | { | |
316 | volatile unsigned short *port_addr; | |
317 | unsigned short *buf = buffer; | |
318 | ||
319 | port_addr = (volatile unsigned short *)PORT2ADDR(port); | |
320 | ||
321 | while (count--) | |
322 | *buf++ = *port_addr; | |
323 | } | |
324 | ||
325 | void microdev_insl(unsigned long port, void *buffer, unsigned long count) | |
326 | { | |
327 | volatile unsigned long *port_addr; | |
328 | unsigned int *buf = buffer; | |
329 | ||
330 | port_addr = (volatile unsigned long *)PORT2ADDR(port); | |
331 | ||
332 | while (count--) | |
333 | *buf++ = *port_addr; | |
334 | } | |
335 | ||
336 | void microdev_outsb(unsigned long port, const void *buffer, unsigned long count) | |
337 | { | |
338 | volatile unsigned char *port_addr; | |
339 | const unsigned char *buf = buffer; | |
340 | ||
341 | port_addr = (volatile unsigned char *)PORT2ADDR(port); | |
342 | ||
343 | while (count--) | |
344 | *port_addr = *buf++; | |
345 | } | |
346 | ||
347 | void microdev_outsw(unsigned long port, const void *buffer, unsigned long count) | |
348 | { | |
349 | volatile unsigned short *port_addr; | |
350 | const unsigned short *buf = buffer; | |
351 | ||
352 | port_addr = (volatile unsigned short *)PORT2ADDR(port); | |
353 | ||
354 | while (count--) | |
355 | *port_addr = *buf++; | |
356 | } | |
357 | ||
358 | void microdev_outsl(unsigned long port, const void *buffer, unsigned long count) | |
359 | { | |
360 | volatile unsigned long *port_addr; | |
361 | const unsigned int *buf = buffer; | |
362 | ||
363 | port_addr = (volatile unsigned long *)PORT2ADDR(port); | |
364 | ||
365 | while (count--) | |
366 | *port_addr = *buf++; | |
367 | } |