Root/
1 | /* |
2 | * linux/arch/arm/mach-omap2/mux.c |
3 | * |
4 | * OMAP2 and OMAP3 pin multiplexing configurations |
5 | * |
6 | * Copyright (C) 2004 - 2008 Texas Instruments Inc. |
7 | * Copyright (C) 2003 - 2008 Nokia Corporation |
8 | * |
9 | * Written by Tony Lindgren |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License as published by |
13 | * the Free Software Foundation; either version 2 of the License, or |
14 | * (at your option) any later version. |
15 | * |
16 | * This program is distributed in the hope that it will be useful, |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
19 | * GNU General Public License for more details. |
20 | * |
21 | * You should have received a copy of the GNU General Public License |
22 | * along with this program; if not, write to the Free Software |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
24 | * |
25 | */ |
26 | #include <linux/kernel.h> |
27 | #include <linux/init.h> |
28 | #include <linux/io.h> |
29 | #include <linux/list.h> |
30 | #include <linux/slab.h> |
31 | #include <linux/ctype.h> |
32 | #include <linux/debugfs.h> |
33 | #include <linux/seq_file.h> |
34 | #include <linux/uaccess.h> |
35 | |
36 | #include <asm/system.h> |
37 | |
38 | #include "control.h" |
39 | #include "mux.h" |
40 | |
41 | #define OMAP_MUX_BASE_OFFSET 0x30 /* Offset from CTRL_BASE */ |
42 | #define OMAP_MUX_BASE_SZ 0x5ca |
43 | #define MUXABLE_GPIO_MODE3 BIT(0) |
44 | |
45 | struct omap_mux_entry { |
46 | struct omap_mux mux; |
47 | struct list_head node; |
48 | }; |
49 | |
50 | static unsigned long mux_phys; |
51 | static void __iomem *mux_base; |
52 | static u8 omap_mux_flags; |
53 | |
54 | u16 omap_mux_read(u16 reg) |
55 | { |
56 | if (cpu_is_omap24xx()) |
57 | return __raw_readb(mux_base + reg); |
58 | else |
59 | return __raw_readw(mux_base + reg); |
60 | } |
61 | |
62 | void omap_mux_write(u16 val, u16 reg) |
63 | { |
64 | if (cpu_is_omap24xx()) |
65 | __raw_writeb(val, mux_base + reg); |
66 | else |
67 | __raw_writew(val, mux_base + reg); |
68 | } |
69 | |
70 | void omap_mux_write_array(struct omap_board_mux *board_mux) |
71 | { |
72 | while (board_mux->reg_offset != OMAP_MUX_TERMINATOR) { |
73 | omap_mux_write(board_mux->value, board_mux->reg_offset); |
74 | board_mux++; |
75 | } |
76 | } |
77 | |
78 | static LIST_HEAD(muxmodes); |
79 | static DEFINE_MUTEX(muxmode_mutex); |
80 | |
81 | #ifdef CONFIG_OMAP_MUX |
82 | |
83 | static char *omap_mux_options; |
84 | |
85 | int __init omap_mux_init_gpio(int gpio, int val) |
86 | { |
87 | struct omap_mux_entry *e; |
88 | struct omap_mux *gpio_mux = NULL; |
89 | u16 old_mode; |
90 | u16 mux_mode; |
91 | int found = 0; |
92 | |
93 | if (!gpio) |
94 | return -EINVAL; |
95 | |
96 | list_for_each_entry(e, &muxmodes, node) { |
97 | struct omap_mux *m = &e->mux; |
98 | if (gpio == m->gpio) { |
99 | gpio_mux = m; |
100 | found++; |
101 | } |
102 | } |
103 | |
104 | if (found == 0) { |
105 | printk(KERN_ERR "mux: Could not set gpio%i\n", gpio); |
106 | return -ENODEV; |
107 | } |
108 | |
109 | if (found > 1) { |
110 | printk(KERN_INFO "mux: Multiple gpio paths (%d) for gpio%i\n", |
111 | found, gpio); |
112 | return -EINVAL; |
113 | } |
114 | |
115 | old_mode = omap_mux_read(gpio_mux->reg_offset); |
116 | mux_mode = val & ~(OMAP_MUX_NR_MODES - 1); |
117 | if (omap_mux_flags & MUXABLE_GPIO_MODE3) |
118 | mux_mode |= OMAP_MUX_MODE3; |
119 | else |
120 | mux_mode |= OMAP_MUX_MODE4; |
121 | printk(KERN_DEBUG "mux: Setting signal %s.gpio%i 0x%04x -> 0x%04x\n", |
122 | gpio_mux->muxnames[0], gpio, old_mode, mux_mode); |
123 | omap_mux_write(mux_mode, gpio_mux->reg_offset); |
124 | |
125 | return 0; |
126 | } |
127 | |
128 | int __init omap_mux_init_signal(const char *muxname, int val) |
129 | { |
130 | struct omap_mux_entry *e; |
131 | const char *mode_name; |
132 | int found = 0, mode0_len = 0; |
133 | |
134 | mode_name = strchr(muxname, '.'); |
135 | if (mode_name) { |
136 | mode0_len = strlen(muxname) - strlen(mode_name); |
137 | mode_name++; |
138 | } else { |
139 | mode_name = muxname; |
140 | } |
141 | |
142 | list_for_each_entry(e, &muxmodes, node) { |
143 | struct omap_mux *m = &e->mux; |
144 | char *m0_entry = m->muxnames[0]; |
145 | int i; |
146 | |
147 | /* First check for full name in mode0.muxmode format */ |
148 | if (mode0_len && strncmp(muxname, m0_entry, mode0_len)) |
149 | continue; |
150 | |
151 | /* Then check for muxmode only */ |
152 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) { |
153 | char *mode_cur = m->muxnames[i]; |
154 | |
155 | if (!mode_cur) |
156 | continue; |
157 | |
158 | if (!strcmp(mode_name, mode_cur)) { |
159 | u16 old_mode; |
160 | u16 mux_mode; |
161 | |
162 | old_mode = omap_mux_read(m->reg_offset); |
163 | mux_mode = val | i; |
164 | printk(KERN_DEBUG "mux: Setting signal " |
165 | "%s.%s 0x%04x -> 0x%04x\n", |
166 | m0_entry, muxname, old_mode, mux_mode); |
167 | omap_mux_write(mux_mode, m->reg_offset); |
168 | found++; |
169 | } |
170 | } |
171 | } |
172 | |
173 | if (found == 1) |
174 | return 0; |
175 | |
176 | if (found > 1) { |
177 | printk(KERN_ERR "mux: Multiple signal paths (%i) for %s\n", |
178 | found, muxname); |
179 | return -EINVAL; |
180 | } |
181 | |
182 | printk(KERN_ERR "mux: Could not set signal %s\n", muxname); |
183 | |
184 | return -ENODEV; |
185 | } |
186 | |
187 | #ifdef CONFIG_DEBUG_FS |
188 | |
189 | #define OMAP_MUX_MAX_NR_FLAGS 10 |
190 | #define OMAP_MUX_TEST_FLAG(val, mask) \ |
191 | if (((val) & (mask)) == (mask)) { \ |
192 | i++; \ |
193 | flags[i] = #mask; \ |
194 | } |
195 | |
196 | /* REVISIT: Add checking for non-optimal mux settings */ |
197 | static inline void omap_mux_decode(struct seq_file *s, u16 val) |
198 | { |
199 | char *flags[OMAP_MUX_MAX_NR_FLAGS]; |
200 | char mode[sizeof("OMAP_MUX_MODE") + 1]; |
201 | int i = -1; |
202 | |
203 | sprintf(mode, "OMAP_MUX_MODE%d", val & 0x7); |
204 | i++; |
205 | flags[i] = mode; |
206 | |
207 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_OFF_WAKEUPENABLE); |
208 | if (val & OMAP_OFF_EN) { |
209 | if (!(val & OMAP_OFFOUT_EN)) { |
210 | if (!(val & OMAP_OFF_PULL_UP)) { |
211 | OMAP_MUX_TEST_FLAG(val, |
212 | OMAP_PIN_OFF_INPUT_PULLDOWN); |
213 | } else { |
214 | OMAP_MUX_TEST_FLAG(val, |
215 | OMAP_PIN_OFF_INPUT_PULLUP); |
216 | } |
217 | } else { |
218 | if (!(val & OMAP_OFFOUT_VAL)) { |
219 | OMAP_MUX_TEST_FLAG(val, |
220 | OMAP_PIN_OFF_OUTPUT_LOW); |
221 | } else { |
222 | OMAP_MUX_TEST_FLAG(val, |
223 | OMAP_PIN_OFF_OUTPUT_HIGH); |
224 | } |
225 | } |
226 | } |
227 | |
228 | if (val & OMAP_INPUT_EN) { |
229 | if (val & OMAP_PULL_ENA) { |
230 | if (!(val & OMAP_PULL_UP)) { |
231 | OMAP_MUX_TEST_FLAG(val, |
232 | OMAP_PIN_INPUT_PULLDOWN); |
233 | } else { |
234 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT_PULLUP); |
235 | } |
236 | } else { |
237 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT); |
238 | } |
239 | } else { |
240 | i++; |
241 | flags[i] = "OMAP_PIN_OUTPUT"; |
242 | } |
243 | |
244 | do { |
245 | seq_printf(s, "%s", flags[i]); |
246 | if (i > 0) |
247 | seq_printf(s, " | "); |
248 | } while (i-- > 0); |
249 | } |
250 | |
251 | #define OMAP_MUX_DEFNAME_LEN 16 |
252 | |
253 | static int omap_mux_dbg_board_show(struct seq_file *s, void *unused) |
254 | { |
255 | struct omap_mux_entry *e; |
256 | |
257 | list_for_each_entry(e, &muxmodes, node) { |
258 | struct omap_mux *m = &e->mux; |
259 | char m0_def[OMAP_MUX_DEFNAME_LEN]; |
260 | char *m0_name = m->muxnames[0]; |
261 | u16 val; |
262 | int i, mode; |
263 | |
264 | if (!m0_name) |
265 | continue; |
266 | |
267 | /* REVISIT: Needs to be updated if mode0 names get longer */ |
268 | for (i = 0; i < OMAP_MUX_DEFNAME_LEN; i++) { |
269 | if (m0_name[i] == '\0') { |
270 | m0_def[i] = m0_name[i]; |
271 | break; |
272 | } |
273 | m0_def[i] = toupper(m0_name[i]); |
274 | } |
275 | val = omap_mux_read(m->reg_offset); |
276 | mode = val & OMAP_MUX_MODE7; |
277 | |
278 | seq_printf(s, "OMAP%i_MUX(%s, ", |
279 | cpu_is_omap34xx() ? 3 : 0, m0_def); |
280 | omap_mux_decode(s, val); |
281 | seq_printf(s, "),\n"); |
282 | } |
283 | |
284 | return 0; |
285 | } |
286 | |
287 | static int omap_mux_dbg_board_open(struct inode *inode, struct file *file) |
288 | { |
289 | return single_open(file, omap_mux_dbg_board_show, &inode->i_private); |
290 | } |
291 | |
292 | static const struct file_operations omap_mux_dbg_board_fops = { |
293 | .open = omap_mux_dbg_board_open, |
294 | .read = seq_read, |
295 | .llseek = seq_lseek, |
296 | .release = single_release, |
297 | }; |
298 | |
299 | static int omap_mux_dbg_signal_show(struct seq_file *s, void *unused) |
300 | { |
301 | struct omap_mux *m = s->private; |
302 | const char *none = "NA"; |
303 | u16 val; |
304 | int mode; |
305 | |
306 | val = omap_mux_read(m->reg_offset); |
307 | mode = val & OMAP_MUX_MODE7; |
308 | |
309 | seq_printf(s, "name: %s.%s (0x%08lx/0x%03x = 0x%04x), b %s, t %s\n", |
310 | m->muxnames[0], m->muxnames[mode], |
311 | mux_phys + m->reg_offset, m->reg_offset, val, |
312 | m->balls[0] ? m->balls[0] : none, |
313 | m->balls[1] ? m->balls[1] : none); |
314 | seq_printf(s, "mode: "); |
315 | omap_mux_decode(s, val); |
316 | seq_printf(s, "\n"); |
317 | seq_printf(s, "signals: %s | %s | %s | %s | %s | %s | %s | %s\n", |
318 | m->muxnames[0] ? m->muxnames[0] : none, |
319 | m->muxnames[1] ? m->muxnames[1] : none, |
320 | m->muxnames[2] ? m->muxnames[2] : none, |
321 | m->muxnames[3] ? m->muxnames[3] : none, |
322 | m->muxnames[4] ? m->muxnames[4] : none, |
323 | m->muxnames[5] ? m->muxnames[5] : none, |
324 | m->muxnames[6] ? m->muxnames[6] : none, |
325 | m->muxnames[7] ? m->muxnames[7] : none); |
326 | |
327 | return 0; |
328 | } |
329 | |
330 | #define OMAP_MUX_MAX_ARG_CHAR 7 |
331 | |
332 | static ssize_t omap_mux_dbg_signal_write(struct file *file, |
333 | const char __user *user_buf, |
334 | size_t count, loff_t *ppos) |
335 | { |
336 | char buf[OMAP_MUX_MAX_ARG_CHAR]; |
337 | struct seq_file *seqf; |
338 | struct omap_mux *m; |
339 | unsigned long val; |
340 | int buf_size, ret; |
341 | |
342 | if (count > OMAP_MUX_MAX_ARG_CHAR) |
343 | return -EINVAL; |
344 | |
345 | memset(buf, 0, sizeof(buf)); |
346 | buf_size = min(count, sizeof(buf) - 1); |
347 | |
348 | if (copy_from_user(buf, user_buf, buf_size)) |
349 | return -EFAULT; |
350 | |
351 | ret = strict_strtoul(buf, 0x10, &val); |
352 | if (ret < 0) |
353 | return ret; |
354 | |
355 | if (val > 0xffff) |
356 | return -EINVAL; |
357 | |
358 | seqf = file->private_data; |
359 | m = seqf->private; |
360 | |
361 | omap_mux_write((u16)val, m->reg_offset); |
362 | *ppos += count; |
363 | |
364 | return count; |
365 | } |
366 | |
367 | static int omap_mux_dbg_signal_open(struct inode *inode, struct file *file) |
368 | { |
369 | return single_open(file, omap_mux_dbg_signal_show, inode->i_private); |
370 | } |
371 | |
372 | static const struct file_operations omap_mux_dbg_signal_fops = { |
373 | .open = omap_mux_dbg_signal_open, |
374 | .read = seq_read, |
375 | .write = omap_mux_dbg_signal_write, |
376 | .llseek = seq_lseek, |
377 | .release = single_release, |
378 | }; |
379 | |
380 | static struct dentry *mux_dbg_dir; |
381 | |
382 | static void __init omap_mux_dbg_init(void) |
383 | { |
384 | struct omap_mux_entry *e; |
385 | |
386 | mux_dbg_dir = debugfs_create_dir("omap_mux", NULL); |
387 | if (!mux_dbg_dir) |
388 | return; |
389 | |
390 | (void)debugfs_create_file("board", S_IRUGO, mux_dbg_dir, |
391 | NULL, &omap_mux_dbg_board_fops); |
392 | |
393 | list_for_each_entry(e, &muxmodes, node) { |
394 | struct omap_mux *m = &e->mux; |
395 | |
396 | (void)debugfs_create_file(m->muxnames[0], S_IWUGO, mux_dbg_dir, |
397 | m, &omap_mux_dbg_signal_fops); |
398 | } |
399 | } |
400 | |
401 | #else |
402 | static inline void omap_mux_dbg_init(void) |
403 | { |
404 | } |
405 | #endif /* CONFIG_DEBUG_FS */ |
406 | |
407 | static void __init omap_mux_free_names(struct omap_mux *m) |
408 | { |
409 | int i; |
410 | |
411 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) |
412 | kfree(m->muxnames[i]); |
413 | |
414 | #ifdef CONFIG_DEBUG_FS |
415 | for (i = 0; i < OMAP_MUX_NR_SIDES; i++) |
416 | kfree(m->balls[i]); |
417 | #endif |
418 | |
419 | } |
420 | |
421 | /* Free all data except for GPIO pins unless CONFIG_DEBUG_FS is set */ |
422 | static int __init omap_mux_late_init(void) |
423 | { |
424 | struct omap_mux_entry *e, *tmp; |
425 | |
426 | list_for_each_entry_safe(e, tmp, &muxmodes, node) { |
427 | struct omap_mux *m = &e->mux; |
428 | u16 mode = omap_mux_read(m->reg_offset); |
429 | |
430 | if (OMAP_MODE_GPIO(mode)) |
431 | continue; |
432 | |
433 | #ifndef CONFIG_DEBUG_FS |
434 | mutex_lock(&muxmode_mutex); |
435 | list_del(&e->node); |
436 | mutex_unlock(&muxmode_mutex); |
437 | omap_mux_free_names(m); |
438 | kfree(m); |
439 | #endif |
440 | |
441 | } |
442 | |
443 | omap_mux_dbg_init(); |
444 | |
445 | return 0; |
446 | } |
447 | late_initcall(omap_mux_late_init); |
448 | |
449 | static void __init omap_mux_package_fixup(struct omap_mux *p, |
450 | struct omap_mux *superset) |
451 | { |
452 | while (p->reg_offset != OMAP_MUX_TERMINATOR) { |
453 | struct omap_mux *s = superset; |
454 | int found = 0; |
455 | |
456 | while (s->reg_offset != OMAP_MUX_TERMINATOR) { |
457 | if (s->reg_offset == p->reg_offset) { |
458 | *s = *p; |
459 | found++; |
460 | break; |
461 | } |
462 | s++; |
463 | } |
464 | if (!found) |
465 | printk(KERN_ERR "mux: Unknown entry offset 0x%x\n", |
466 | p->reg_offset); |
467 | p++; |
468 | } |
469 | } |
470 | |
471 | #ifdef CONFIG_DEBUG_FS |
472 | |
473 | static void __init omap_mux_package_init_balls(struct omap_ball *b, |
474 | struct omap_mux *superset) |
475 | { |
476 | while (b->reg_offset != OMAP_MUX_TERMINATOR) { |
477 | struct omap_mux *s = superset; |
478 | int found = 0; |
479 | |
480 | while (s->reg_offset != OMAP_MUX_TERMINATOR) { |
481 | if (s->reg_offset == b->reg_offset) { |
482 | s->balls[0] = b->balls[0]; |
483 | s->balls[1] = b->balls[1]; |
484 | found++; |
485 | break; |
486 | } |
487 | s++; |
488 | } |
489 | if (!found) |
490 | printk(KERN_ERR "mux: Unknown ball offset 0x%x\n", |
491 | b->reg_offset); |
492 | b++; |
493 | } |
494 | } |
495 | |
496 | #else /* CONFIG_DEBUG_FS */ |
497 | |
498 | static inline void omap_mux_package_init_balls(struct omap_ball *b, |
499 | struct omap_mux *superset) |
500 | { |
501 | } |
502 | |
503 | #endif /* CONFIG_DEBUG_FS */ |
504 | |
505 | static int __init omap_mux_setup(char *options) |
506 | { |
507 | if (!options) |
508 | return 0; |
509 | |
510 | omap_mux_options = options; |
511 | |
512 | return 1; |
513 | } |
514 | __setup("omap_mux=", omap_mux_setup); |
515 | |
516 | /* |
517 | * Note that the omap_mux=some.signal1=0x1234,some.signal2=0x1234 |
518 | * cmdline options only override the bootloader values. |
519 | * During development, please enable CONFIG_DEBUG_FS, and use the |
520 | * signal specific entries under debugfs. |
521 | */ |
522 | static void __init omap_mux_set_cmdline_signals(void) |
523 | { |
524 | char *options, *next_opt, *token; |
525 | |
526 | if (!omap_mux_options) |
527 | return; |
528 | |
529 | options = kmalloc(strlen(omap_mux_options) + 1, GFP_KERNEL); |
530 | if (!options) |
531 | return; |
532 | |
533 | strcpy(options, omap_mux_options); |
534 | next_opt = options; |
535 | |
536 | while ((token = strsep(&next_opt, ",")) != NULL) { |
537 | char *keyval, *name; |
538 | unsigned long val; |
539 | |
540 | keyval = token; |
541 | name = strsep(&keyval, "="); |
542 | if (name) { |
543 | int res; |
544 | |
545 | res = strict_strtoul(keyval, 0x10, &val); |
546 | if (res < 0) |
547 | continue; |
548 | |
549 | omap_mux_init_signal(name, (u16)val); |
550 | } |
551 | } |
552 | |
553 | kfree(options); |
554 | } |
555 | |
556 | static int __init omap_mux_copy_names(struct omap_mux *src, |
557 | struct omap_mux *dst) |
558 | { |
559 | int i; |
560 | |
561 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) { |
562 | if (src->muxnames[i]) { |
563 | dst->muxnames[i] = |
564 | kmalloc(strlen(src->muxnames[i]) + 1, |
565 | GFP_KERNEL); |
566 | if (!dst->muxnames[i]) |
567 | goto free; |
568 | strcpy(dst->muxnames[i], src->muxnames[i]); |
569 | } |
570 | } |
571 | |
572 | #ifdef CONFIG_DEBUG_FS |
573 | for (i = 0; i < OMAP_MUX_NR_SIDES; i++) { |
574 | if (src->balls[i]) { |
575 | dst->balls[i] = |
576 | kmalloc(strlen(src->balls[i]) + 1, |
577 | GFP_KERNEL); |
578 | if (!dst->balls[i]) |
579 | goto free; |
580 | strcpy(dst->balls[i], src->balls[i]); |
581 | } |
582 | } |
583 | #endif |
584 | |
585 | return 0; |
586 | |
587 | free: |
588 | omap_mux_free_names(dst); |
589 | return -ENOMEM; |
590 | |
591 | } |
592 | |
593 | #endif /* CONFIG_OMAP_MUX */ |
594 | |
595 | static u16 omap_mux_get_by_gpio(int gpio) |
596 | { |
597 | struct omap_mux_entry *e; |
598 | u16 offset = OMAP_MUX_TERMINATOR; |
599 | |
600 | list_for_each_entry(e, &muxmodes, node) { |
601 | struct omap_mux *m = &e->mux; |
602 | if (m->gpio == gpio) { |
603 | offset = m->reg_offset; |
604 | break; |
605 | } |
606 | } |
607 | |
608 | return offset; |
609 | } |
610 | |
611 | /* Needed for dynamic muxing of GPIO pins for off-idle */ |
612 | u16 omap_mux_get_gpio(int gpio) |
613 | { |
614 | u16 offset; |
615 | |
616 | offset = omap_mux_get_by_gpio(gpio); |
617 | if (offset == OMAP_MUX_TERMINATOR) { |
618 | printk(KERN_ERR "mux: Could not get gpio%i\n", gpio); |
619 | return offset; |
620 | } |
621 | |
622 | return omap_mux_read(offset); |
623 | } |
624 | |
625 | /* Needed for dynamic muxing of GPIO pins for off-idle */ |
626 | void omap_mux_set_gpio(u16 val, int gpio) |
627 | { |
628 | u16 offset; |
629 | |
630 | offset = omap_mux_get_by_gpio(gpio); |
631 | if (offset == OMAP_MUX_TERMINATOR) { |
632 | printk(KERN_ERR "mux: Could not set gpio%i\n", gpio); |
633 | return; |
634 | } |
635 | |
636 | omap_mux_write(val, offset); |
637 | } |
638 | |
639 | static struct omap_mux * __init omap_mux_list_add(struct omap_mux *src) |
640 | { |
641 | struct omap_mux_entry *entry; |
642 | struct omap_mux *m; |
643 | |
644 | entry = kzalloc(sizeof(struct omap_mux_entry), GFP_KERNEL); |
645 | if (!entry) |
646 | return NULL; |
647 | |
648 | m = &entry->mux; |
649 | memcpy(m, src, sizeof(struct omap_mux_entry)); |
650 | |
651 | #ifdef CONFIG_OMAP_MUX |
652 | if (omap_mux_copy_names(src, m)) { |
653 | kfree(entry); |
654 | return NULL; |
655 | } |
656 | #endif |
657 | |
658 | mutex_lock(&muxmode_mutex); |
659 | list_add_tail(&entry->node, &muxmodes); |
660 | mutex_unlock(&muxmode_mutex); |
661 | |
662 | return m; |
663 | } |
664 | |
665 | /* |
666 | * Note if CONFIG_OMAP_MUX is not selected, we will only initialize |
667 | * the GPIO to mux offset mapping that is needed for dynamic muxing |
668 | * of GPIO pins for off-idle. |
669 | */ |
670 | static void __init omap_mux_init_list(struct omap_mux *superset) |
671 | { |
672 | while (superset->reg_offset != OMAP_MUX_TERMINATOR) { |
673 | struct omap_mux *entry; |
674 | |
675 | #ifdef CONFIG_OMAP_MUX |
676 | if (!superset->muxnames || !superset->muxnames[0]) { |
677 | superset++; |
678 | continue; |
679 | } |
680 | #else |
681 | /* Skip pins that are not muxed as GPIO by bootloader */ |
682 | if (!OMAP_MODE_GPIO(omap_mux_read(superset->reg_offset))) { |
683 | superset++; |
684 | continue; |
685 | } |
686 | #endif |
687 | |
688 | entry = omap_mux_list_add(superset); |
689 | if (!entry) { |
690 | printk(KERN_ERR "mux: Could not add entry\n"); |
691 | return; |
692 | } |
693 | superset++; |
694 | } |
695 | } |
696 | |
697 | #ifdef CONFIG_OMAP_MUX |
698 | |
699 | static void omap_mux_init_package(struct omap_mux *superset, |
700 | struct omap_mux *package_subset, |
701 | struct omap_ball *package_balls) |
702 | { |
703 | if (package_subset) |
704 | omap_mux_package_fixup(package_subset, superset); |
705 | if (package_balls) |
706 | omap_mux_package_init_balls(package_balls, superset); |
707 | } |
708 | |
709 | static void omap_mux_init_signals(struct omap_board_mux *board_mux) |
710 | { |
711 | omap_mux_set_cmdline_signals(); |
712 | omap_mux_write_array(board_mux); |
713 | } |
714 | |
715 | #else |
716 | |
717 | static void omap_mux_init_package(struct omap_mux *superset, |
718 | struct omap_mux *package_subset, |
719 | struct omap_ball *package_balls) |
720 | { |
721 | } |
722 | |
723 | static void omap_mux_init_signals(struct omap_board_mux *board_mux) |
724 | { |
725 | } |
726 | |
727 | #endif |
728 | |
729 | int __init omap_mux_init(u32 mux_pbase, u32 mux_size, |
730 | struct omap_mux *superset, |
731 | struct omap_mux *package_subset, |
732 | struct omap_board_mux *board_mux, |
733 | struct omap_ball *package_balls) |
734 | { |
735 | if (mux_base) |
736 | return -EBUSY; |
737 | |
738 | mux_phys = mux_pbase; |
739 | mux_base = ioremap(mux_pbase, mux_size); |
740 | if (!mux_base) { |
741 | printk(KERN_ERR "mux: Could not ioremap\n"); |
742 | return -ENODEV; |
743 | } |
744 | |
745 | if (cpu_is_omap24xx()) |
746 | omap_mux_flags = MUXABLE_GPIO_MODE3; |
747 | |
748 | omap_mux_init_package(superset, package_subset, package_balls); |
749 | omap_mux_init_list(superset); |
750 | omap_mux_init_signals(board_mux); |
751 | |
752 | return 0; |
753 | } |
754 | |
755 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9