Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * eisa_enumerator.c - provide support for EISA adapters in PA-RISC machines | |
4 | * | |
1da177e4 | 5 | * Copyright (c) 2002 Daniel Engstrom <5116@telia.com> |
1da177e4 LT |
6 | */ |
7 | ||
8 | #include <linux/ioport.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/slab.h> | |
12 | #include <asm/io.h> | |
7c0f6ba6 | 13 | #include <linux/uaccess.h> |
1da177e4 LT |
14 | #include <asm/byteorder.h> |
15 | ||
16 | #include <asm/eisa_bus.h> | |
17 | #include <asm/eisa_eeprom.h> | |
18 | ||
19 | ||
20 | /* | |
21 | * Todo: | |
22 | * | |
23 | * PORT init with MASK attr and other size than byte | |
24 | * MEMORY with other decode than 20 bit | |
25 | * CRC stuff | |
26 | * FREEFORM stuff | |
27 | */ | |
28 | ||
29 | #define EPI 0xc80 | |
30 | #define NUM_SLOT 16 | |
31 | #define SLOT2PORT(x) (x<<12) | |
32 | ||
33 | ||
34 | /* macros to handle unaligned accesses and | |
35 | * byte swapping. The data in the EEPROM is | |
36 | * little-endian on the big-endian PAROSC */ | |
37 | #define get_8(x) (*(u_int8_t*)(x)) | |
38 | ||
39 | static inline u_int16_t get_16(const unsigned char *x) | |
40 | { | |
41 | return (x[1] << 8) | x[0]; | |
42 | } | |
43 | ||
44 | static inline u_int32_t get_32(const unsigned char *x) | |
45 | { | |
46 | return (x[3] << 24) | (x[2] << 16) | (x[1] << 8) | x[0]; | |
47 | } | |
48 | ||
49 | static inline u_int32_t get_24(const unsigned char *x) | |
50 | { | |
51 | return (x[2] << 24) | (x[1] << 16) | (x[0] << 8); | |
52 | } | |
53 | ||
54 | static void print_eisa_id(char *s, u_int32_t id) | |
55 | { | |
56 | char vendor[4]; | |
57 | int rev; | |
58 | int device; | |
59 | ||
60 | rev = id & 0xff; | |
61 | id >>= 8; | |
62 | device = id & 0xff; | |
63 | id >>= 8; | |
64 | vendor[3] = '\0'; | |
65 | vendor[2] = '@' + (id & 0x1f); | |
66 | id >>= 5; | |
67 | vendor[1] = '@' + (id & 0x1f); | |
68 | id >>= 5; | |
69 | vendor[0] = '@' + (id & 0x1f); | |
70 | id >>= 5; | |
71 | ||
72 | sprintf(s, "%s%02X%02X", vendor, device, rev); | |
73 | } | |
74 | ||
75 | static int configure_memory(const unsigned char *buf, | |
76 | struct resource *mem_parent, | |
77 | char *name) | |
78 | { | |
79 | int len; | |
80 | u_int8_t c; | |
81 | int i; | |
82 | struct resource *res; | |
83 | ||
84 | len=0; | |
85 | ||
86 | for (i=0;i<HPEE_MEMORY_MAX_ENT;i++) { | |
87 | c = get_8(buf+len); | |
88 | ||
9a975bee | 89 | if (NULL != (res = kzalloc(sizeof(struct resource), GFP_KERNEL))) { |
1da177e4 LT |
90 | int result; |
91 | ||
92 | res->name = name; | |
93 | res->start = mem_parent->start + get_24(buf+len+2); | |
94 | res->end = res->start + get_16(buf+len+5)*1024; | |
95 | res->flags = IORESOURCE_MEM; | |
ebee4b02 | 96 | pr_cont("memory %pR ", res); |
1da177e4 LT |
97 | result = request_resource(mem_parent, res); |
98 | if (result < 0) { | |
ad361c98 | 99 | printk(KERN_ERR "EISA Enumerator: failed to claim EISA Bus address space!\n"); |
1da177e4 LT |
100 | return result; |
101 | } | |
102 | } | |
103 | ||
104 | len+=7; | |
105 | ||
106 | if (!(c & HPEE_MEMORY_MORE)) { | |
107 | break; | |
108 | } | |
109 | } | |
110 | ||
111 | return len; | |
112 | } | |
113 | ||
114 | ||
115 | static int configure_irq(const unsigned char *buf) | |
116 | { | |
117 | int len; | |
118 | u_int8_t c; | |
119 | int i; | |
120 | ||
121 | len=0; | |
122 | ||
123 | for (i=0;i<HPEE_IRQ_MAX_ENT;i++) { | |
124 | c = get_8(buf+len); | |
125 | ||
ebee4b02 | 126 | pr_cont("IRQ %d ", c & HPEE_IRQ_CHANNEL_MASK); |
1da177e4 LT |
127 | if (c & HPEE_IRQ_TRIG_LEVEL) { |
128 | eisa_make_irq_level(c & HPEE_IRQ_CHANNEL_MASK); | |
129 | } else { | |
130 | eisa_make_irq_edge(c & HPEE_IRQ_CHANNEL_MASK); | |
131 | } | |
132 | ||
133 | len+=2; | |
134 | /* hpux seems to allow for | |
135 | * two bytes of irq data but only defines one of | |
136 | * them, I think */ | |
137 | if (!(c & HPEE_IRQ_MORE)) { | |
138 | break; | |
139 | } | |
140 | } | |
141 | ||
142 | return len; | |
143 | } | |
144 | ||
145 | ||
146 | static int configure_dma(const unsigned char *buf) | |
147 | { | |
148 | int len; | |
149 | u_int8_t c; | |
150 | int i; | |
151 | ||
152 | len=0; | |
153 | ||
154 | for (i=0;i<HPEE_DMA_MAX_ENT;i++) { | |
155 | c = get_8(buf+len); | |
ebee4b02 | 156 | pr_cont("DMA %d ", c&HPEE_DMA_CHANNEL_MASK); |
1da177e4 LT |
157 | /* fixme: maybe initialize the dma channel withthe timing ? */ |
158 | len+=2; | |
159 | if (!(c & HPEE_DMA_MORE)) { | |
160 | break; | |
161 | } | |
162 | } | |
163 | ||
164 | return len; | |
165 | } | |
166 | ||
167 | static int configure_port(const unsigned char *buf, struct resource *io_parent, | |
168 | char *board) | |
169 | { | |
170 | int len; | |
171 | u_int8_t c; | |
172 | int i; | |
173 | struct resource *res; | |
174 | int result; | |
175 | ||
176 | len=0; | |
177 | ||
178 | for (i=0;i<HPEE_PORT_MAX_ENT;i++) { | |
179 | c = get_8(buf+len); | |
180 | ||
9a975bee | 181 | if (NULL != (res = kzalloc(sizeof(struct resource), GFP_KERNEL))) { |
1da177e4 LT |
182 | res->name = board; |
183 | res->start = get_16(buf+len+1); | |
184 | res->end = get_16(buf+len+1)+(c&HPEE_PORT_SIZE_MASK)+1; | |
185 | res->flags = IORESOURCE_IO; | |
ebee4b02 | 186 | pr_cont("ioports %pR ", res); |
1da177e4 LT |
187 | result = request_resource(io_parent, res); |
188 | if (result < 0) { | |
ad361c98 | 189 | printk(KERN_ERR "EISA Enumerator: failed to claim EISA Bus address space!\n"); |
1da177e4 LT |
190 | return result; |
191 | } | |
192 | } | |
193 | ||
194 | len+=3; | |
195 | if (!(c & HPEE_PORT_MORE)) { | |
196 | break; | |
197 | } | |
198 | } | |
199 | ||
200 | return len; | |
201 | } | |
202 | ||
203 | ||
204 | /* byte 1 and 2 is the port number to write | |
205 | * and at byte 3 the value to write starts. | |
206 | * I assume that there are and- and or- masks | |
207 | * here when HPEE_PORT_INIT_MASK is set but I have | |
208 | * not yet encountered this. */ | |
209 | static int configure_port_init(const unsigned char *buf) | |
210 | { | |
211 | int len=0; | |
212 | u_int8_t c; | |
213 | ||
214 | while (len<HPEE_PORT_INIT_MAX_LEN) { | |
215 | int s=0; | |
216 | c = get_8(buf+len); | |
217 | ||
218 | switch (c & HPEE_PORT_INIT_WIDTH_MASK) { | |
219 | case HPEE_PORT_INIT_WIDTH_BYTE: | |
220 | s=1; | |
221 | if (c & HPEE_PORT_INIT_MASK) { | |
ad361c98 | 222 | printk(KERN_WARNING "port_init: unverified mask attribute\n"); |
1da177e4 LT |
223 | outb((inb(get_16(buf+len+1) & |
224 | get_8(buf+len+3)) | | |
225 | get_8(buf+len+4)), get_16(buf+len+1)); | |
226 | ||
227 | } else { | |
228 | outb(get_8(buf+len+3), get_16(buf+len+1)); | |
229 | ||
230 | } | |
231 | break; | |
232 | case HPEE_PORT_INIT_WIDTH_WORD: | |
233 | s=2; | |
234 | if (c & HPEE_PORT_INIT_MASK) { | |
235 | printk(KERN_WARNING "port_init: unverified mask attribute\n"); | |
236 | outw((inw(get_16(buf+len+1)) & | |
237 | get_16(buf+len+3)) | | |
238 | get_16(buf+len+5), | |
239 | get_16(buf+len+1)); | |
240 | } else { | |
241 | outw(cpu_to_le16(get_16(buf+len+3)), get_16(buf+len+1)); | |
242 | } | |
243 | break; | |
244 | case HPEE_PORT_INIT_WIDTH_DWORD: | |
245 | s=4; | |
246 | if (c & HPEE_PORT_INIT_MASK) { | |
ad361c98 | 247 | printk(KERN_WARNING "port_init: unverified mask attribute\n"); |
1da177e4 LT |
248 | outl((inl(get_16(buf+len+1) & |
249 | get_32(buf+len+3)) | | |
250 | get_32(buf+len+7)), get_16(buf+len+1)); | |
251 | } else { | |
252 | outl(cpu_to_le32(get_32(buf+len+3)), get_16(buf+len+1)); | |
253 | } | |
254 | ||
255 | break; | |
256 | default: | |
ad361c98 | 257 | printk(KERN_ERR "Invalid port init word %02x\n", c); |
1da177e4 LT |
258 | return 0; |
259 | } | |
260 | ||
261 | if (c & HPEE_PORT_INIT_MASK) { | |
262 | s*=2; | |
263 | } | |
264 | ||
265 | len+=s+3; | |
266 | if (!(c & HPEE_PORT_INIT_MORE)) { | |
267 | break; | |
268 | } | |
269 | } | |
270 | ||
271 | return len; | |
272 | } | |
273 | ||
274 | static int configure_choise(const unsigned char *buf, u_int8_t *info) | |
275 | { | |
276 | int len; | |
277 | ||
278 | /* theis record contain the value of the functions | |
279 | * configuration choises and an info byte which | |
280 | * describes which other records to expect in this | |
281 | * function */ | |
282 | len = get_8(buf); | |
283 | *info=get_8(buf+len+1); | |
284 | ||
285 | return len+2; | |
286 | } | |
287 | ||
288 | static int configure_type_string(const unsigned char *buf) | |
289 | { | |
290 | int len; | |
291 | ||
292 | /* just skip past the type field */ | |
293 | len = get_8(buf); | |
294 | if (len > 80) { | |
ad361c98 | 295 | printk(KERN_ERR "eisa_enumerator: type info field too long (%d, max is 80)\n", len); |
1da177e4 LT |
296 | } |
297 | ||
298 | return 1+len; | |
299 | } | |
300 | ||
301 | static int configure_function(const unsigned char *buf, int *more) | |
302 | { | |
303 | /* the init field seems to be a two-byte field | |
304 | * which is non-zero if there are an other function following | |
305 | * I think it is the length of the function def | |
306 | */ | |
307 | *more = get_16(buf); | |
308 | ||
309 | return 2; | |
310 | } | |
311 | ||
312 | static int parse_slot_config(int slot, | |
313 | const unsigned char *buf, | |
314 | struct eeprom_eisa_slot_info *es, | |
315 | struct resource *io_parent, | |
316 | struct resource *mem_parent) | |
317 | { | |
318 | int res=0; | |
319 | int function_len; | |
320 | unsigned int pos=0; | |
321 | unsigned int maxlen; | |
322 | int num_func=0; | |
323 | u_int8_t flags; | |
324 | int p0; | |
325 | ||
326 | char *board; | |
327 | int id_string_used=0; | |
328 | ||
329 | if (NULL == (board = kmalloc(8, GFP_KERNEL))) { | |
330 | return -1; | |
331 | } | |
332 | print_eisa_id(board, es->eisa_slot_id); | |
333 | printk(KERN_INFO "EISA slot %d: %s %s ", | |
334 | slot, board, es->flags&HPEE_FLAG_BOARD_IS_ISA ? "ISA" : "EISA"); | |
335 | ||
336 | maxlen = es->config_data_length < HPEE_MAX_LENGTH ? | |
337 | es->config_data_length : HPEE_MAX_LENGTH; | |
338 | while ((pos < maxlen) && (num_func <= es->num_functions)) { | |
339 | pos+=configure_function(buf+pos, &function_len); | |
340 | ||
341 | if (!function_len) { | |
342 | break; | |
343 | } | |
344 | num_func++; | |
345 | p0 = pos; | |
346 | pos += configure_choise(buf+pos, &flags); | |
347 | ||
348 | if (flags & HPEE_FUNCTION_INFO_F_DISABLED) { | |
349 | /* function disabled, skip silently */ | |
350 | pos = p0 + function_len; | |
351 | continue; | |
352 | } | |
353 | if (flags & HPEE_FUNCTION_INFO_CFG_FREE_FORM) { | |
354 | /* I have no idea how to handle this */ | |
d939be3a | 355 | printk("function %d have free-form configuration, skipping ", |
1da177e4 LT |
356 | num_func); |
357 | pos = p0 + function_len; | |
358 | continue; | |
359 | } | |
360 | ||
361 | /* the ordering of the sections need | |
362 | * more investigation. | |
363 | * Currently I think that memory comaed before IRQ | |
364 | * I assume the order is LSB to MSB in the | |
365 | * info flags | |
366 | * eg type, memory, irq, dma, port, HPEE_PORT_init | |
367 | */ | |
368 | ||
369 | if (flags & HPEE_FUNCTION_INFO_HAVE_TYPE) { | |
370 | pos += configure_type_string(buf+pos); | |
371 | } | |
372 | ||
373 | if (flags & HPEE_FUNCTION_INFO_HAVE_MEMORY) { | |
374 | id_string_used=1; | |
375 | pos += configure_memory(buf+pos, mem_parent, board); | |
376 | } | |
377 | ||
378 | if (flags & HPEE_FUNCTION_INFO_HAVE_IRQ) { | |
379 | pos += configure_irq(buf+pos); | |
380 | } | |
381 | ||
382 | if (flags & HPEE_FUNCTION_INFO_HAVE_DMA) { | |
383 | pos += configure_dma(buf+pos); | |
384 | } | |
385 | ||
386 | if (flags & HPEE_FUNCTION_INFO_HAVE_PORT) { | |
387 | id_string_used=1; | |
388 | pos += configure_port(buf+pos, io_parent, board); | |
389 | } | |
390 | ||
391 | if (flags & HPEE_FUNCTION_INFO_HAVE_PORT_INIT) { | |
392 | pos += configure_port_init(buf+pos); | |
393 | } | |
394 | ||
395 | if (p0 + function_len < pos) { | |
ad361c98 | 396 | printk(KERN_ERR "eisa_enumerator: function %d length mis-match " |
1da177e4 LT |
397 | "got %d, expected %d\n", |
398 | num_func, pos-p0, function_len); | |
399 | res=-1; | |
400 | break; | |
401 | } | |
402 | pos = p0 + function_len; | |
403 | } | |
ebee4b02 | 404 | pr_cont("\n"); |
1da177e4 LT |
405 | if (!id_string_used) { |
406 | kfree(board); | |
407 | } | |
408 | ||
409 | if (pos != es->config_data_length) { | |
410 | printk(KERN_ERR "eisa_enumerator: config data length mis-match got %d, expected %d\n", | |
411 | pos, es->config_data_length); | |
412 | res=-1; | |
413 | } | |
414 | ||
415 | if (num_func != es->num_functions) { | |
416 | printk(KERN_ERR "eisa_enumerator: number of functions mis-match got %d, expected %d\n", | |
417 | num_func, es->num_functions); | |
418 | res=-2; | |
419 | } | |
420 | ||
421 | return res; | |
422 | ||
423 | } | |
424 | ||
425 | static int init_slot(int slot, struct eeprom_eisa_slot_info *es) | |
426 | { | |
427 | unsigned int id; | |
428 | ||
429 | char id_string[8]; | |
430 | ||
431 | if (!(es->slot_info&HPEE_SLOT_INFO_NO_READID)) { | |
432 | /* try to read the id of the board in the slot */ | |
433 | id = le32_to_cpu(inl(SLOT2PORT(slot)+EPI)); | |
434 | ||
435 | if (0xffffffff == id) { | |
436 | /* Maybe we didn't expect a card to be here... */ | |
437 | if (es->eisa_slot_id == 0xffffffff) | |
438 | return -1; | |
439 | ||
440 | /* this board is not here or it does not | |
441 | * support readid | |
442 | */ | |
443 | printk(KERN_ERR "EISA slot %d a configured board was not detected (", | |
444 | slot); | |
445 | ||
446 | print_eisa_id(id_string, es->eisa_slot_id); | |
447 | printk(" expected %s)\n", id_string); | |
448 | ||
449 | return -1; | |
450 | ||
451 | } | |
452 | if (es->eisa_slot_id != id) { | |
453 | print_eisa_id(id_string, id); | |
454 | printk(KERN_ERR "EISA slot %d id mis-match: got %s", | |
455 | slot, id_string); | |
456 | ||
457 | print_eisa_id(id_string, es->eisa_slot_id); | |
a3bee03e | 458 | printk(" expected %s\n", id_string); |
1da177e4 LT |
459 | |
460 | return -1; | |
461 | ||
462 | } | |
463 | } | |
464 | ||
465 | /* now: we need to enable the board if | |
466 | * it supports enabling and run through | |
467 | * the port init sction if present | |
468 | * and finally record any interrupt polarity | |
469 | */ | |
470 | if (es->slot_features & HPEE_SLOT_FEATURES_ENABLE) { | |
471 | /* enable board */ | |
472 | outb(0x01| inb(SLOT2PORT(slot)+EPI+4), | |
473 | SLOT2PORT(slot)+EPI+4); | |
474 | } | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
479 | ||
480 | int eisa_enumerator(unsigned long eeprom_addr, | |
481 | struct resource *io_parent, struct resource *mem_parent) | |
482 | { | |
483 | int i; | |
484 | struct eeprom_header *eh; | |
485 | static char eeprom_buf[HPEE_MAX_LENGTH]; | |
486 | ||
487 | for (i=0; i < HPEE_MAX_LENGTH; i++) { | |
488 | eeprom_buf[i] = gsc_readb(eeprom_addr+i); | |
489 | } | |
490 | ||
491 | printk(KERN_INFO "Enumerating EISA bus\n"); | |
492 | ||
493 | eh = (struct eeprom_header*)(eeprom_buf); | |
494 | for (i=0;i<eh->num_slots;i++) { | |
495 | struct eeprom_eisa_slot_info *es; | |
496 | ||
497 | es = (struct eeprom_eisa_slot_info*) | |
498 | (&eeprom_buf[HPEE_SLOT_INFO(i)]); | |
499 | ||
500 | if (-1==init_slot(i+1, es)) { | |
501 | continue; | |
502 | } | |
503 | ||
504 | if (es->config_data_offset < HPEE_MAX_LENGTH) { | |
505 | if (parse_slot_config(i+1, &eeprom_buf[es->config_data_offset], | |
506 | es, io_parent, mem_parent)) { | |
507 | return -1; | |
508 | } | |
509 | } else { | |
510 | printk (KERN_WARNING "EISA EEPROM offset 0x%x out of range\n",es->config_data_offset); | |
511 | return -1; | |
512 | } | |
513 | } | |
514 | return eh->num_slots; | |
515 | } | |
516 |