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1dbae815 TL |
1 | /* |
2 | * linux/arch/arm/mach-omap2/mux.c | |
3 | * | |
2351872c | 4 | * OMAP2 and OMAP3 pin multiplexing configurations |
1dbae815 | 5 | * |
9330899e TL |
6 | * Copyright (C) 2004 - 2008 Texas Instruments Inc. |
7 | * Copyright (C) 2003 - 2008 Nokia Corporation | |
1dbae815 | 8 | * |
9330899e | 9 | * Written by Tony Lindgren |
1dbae815 TL |
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 | */ | |
4814ced5 | 26 | #include <linux/kernel.h> |
1dbae815 | 27 | #include <linux/init.h> |
fced80c7 | 28 | #include <linux/io.h> |
15ac7afe | 29 | #include <linux/list.h> |
4814ced5 | 30 | #include <linux/slab.h> |
4b715efc TL |
31 | #include <linux/ctype.h> |
32 | #include <linux/debugfs.h> | |
33 | #include <linux/seq_file.h> | |
34 | #include <linux/uaccess.h> | |
1dbae815 | 35 | |
fced80c7 RK |
36 | #include <asm/system.h> |
37 | ||
4814ced5 | 38 | #include "control.h" |
15ac7afe | 39 | #include "mux.h" |
1dbae815 | 40 | |
92c9f501 MR |
41 | #define OMAP_MUX_BASE_OFFSET 0x30 /* Offset from CTRL_BASE */ |
42 | #define OMAP_MUX_BASE_SZ 0x5ca | |
d5425be6 | 43 | #define MUXABLE_GPIO_MODE3 BIT(0) |
92c9f501 | 44 | |
15ac7afe TL |
45 | struct omap_mux_entry { |
46 | struct omap_mux mux; | |
47 | struct list_head node; | |
48 | }; | |
49 | ||
4b715efc | 50 | static unsigned long mux_phys; |
92c9f501 | 51 | static void __iomem *mux_base; |
d5425be6 | 52 | static u8 omap_mux_flags; |
92c9f501 | 53 | |
d4bb72e5 | 54 | u16 omap_mux_read(u16 reg) |
92c9f501 MR |
55 | { |
56 | if (cpu_is_omap24xx()) | |
57 | return __raw_readb(mux_base + reg); | |
58 | else | |
59 | return __raw_readw(mux_base + reg); | |
60 | } | |
61 | ||
d4bb72e5 | 62 | void omap_mux_write(u16 val, u16 reg) |
92c9f501 MR |
63 | { |
64 | if (cpu_is_omap24xx()) | |
65 | __raw_writeb(val, mux_base + reg); | |
66 | else | |
67 | __raw_writew(val, mux_base + reg); | |
68 | } | |
7d7f665d | 69 | |
d4bb72e5 TL |
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 | ||
15ac7afe TL |
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; | |
ca828760 | 88 | struct omap_mux *gpio_mux = NULL; |
8a6f7e14 GI |
89 | u16 old_mode; |
90 | u16 mux_mode; | |
15ac7afe TL |
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) { | |
8a6f7e14 | 99 | gpio_mux = m; |
15ac7afe TL |
100 | found++; |
101 | } | |
102 | } | |
103 | ||
8a6f7e14 | 104 | if (found == 0) { |
1cbb3a9a | 105 | pr_err("mux: Could not set gpio%i\n", gpio); |
8a6f7e14 GI |
106 | return -ENODEV; |
107 | } | |
15ac7afe TL |
108 | |
109 | if (found > 1) { | |
1cbb3a9a BC |
110 | pr_info("mux: Multiple gpio paths (%d) for gpio%i\n", |
111 | found, gpio); | |
15ac7afe TL |
112 | return -EINVAL; |
113 | } | |
114 | ||
8a6f7e14 GI |
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; | |
1cbb3a9a BC |
121 | pr_debug("mux: Setting signal %s.gpio%i 0x%04x -> 0x%04x\n", |
122 | gpio_mux->muxnames[0], gpio, old_mode, mux_mode); | |
8a6f7e14 | 123 | omap_mux_write(mux_mode, gpio_mux->reg_offset); |
15ac7afe | 124 | |
8a6f7e14 | 125 | return 0; |
15ac7afe TL |
126 | } |
127 | ||
5a3b2f7a | 128 | int __init omap_mux_init_signal(const char *muxname, int val) |
15ac7afe TL |
129 | { |
130 | struct omap_mux_entry *e; | |
5a3b2f7a TL |
131 | const char *mode_name; |
132 | int found = 0, mode0_len = 0; | |
15ac7afe TL |
133 | |
134 | mode_name = strchr(muxname, '.'); | |
135 | if (mode_name) { | |
5a3b2f7a | 136 | mode0_len = strlen(muxname) - strlen(mode_name); |
15ac7afe | 137 | mode_name++; |
15ac7afe TL |
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 | ||
5a3b2f7a TL |
147 | /* First check for full name in mode0.muxmode format */ |
148 | if (mode0_len && strncmp(muxname, m0_entry, mode0_len)) | |
15ac7afe TL |
149 | continue; |
150 | ||
5a3b2f7a | 151 | /* Then check for muxmode only */ |
15ac7afe TL |
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; | |
1cbb3a9a BC |
164 | pr_debug("mux: Setting signal " |
165 | "%s.%s 0x%04x -> 0x%04x\n", | |
166 | m0_entry, muxname, old_mode, mux_mode); | |
15ac7afe TL |
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) { | |
1cbb3a9a BC |
177 | pr_err("mux: Multiple signal paths (%i) for %s\n", |
178 | found, muxname); | |
15ac7afe TL |
179 | return -EINVAL; |
180 | } | |
181 | ||
1cbb3a9a | 182 | pr_err("mux: Could not set signal %s\n", muxname); |
15ac7afe TL |
183 | |
184 | return -ENODEV; | |
185 | } | |
186 | ||
4b715efc TL |
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]; | |
78737ae1 | 200 | char mode[sizeof("OMAP_MUX_MODE") + 1]; |
4b715efc TL |
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 | ||
78737ae1 | 267 | /* REVISIT: Needs to be updated if mode0 names get longer */ |
4b715efc TL |
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 | ||
15ac7afe TL |
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); | |
1dbae815 | 439 | #endif |
15ac7afe TL |
440 | |
441 | } | |
442 | ||
4b715efc TL |
443 | omap_mux_dbg_init(); |
444 | ||
15ac7afe TL |
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) | |
1cbb3a9a BC |
465 | pr_err("mux: Unknown entry offset 0x%x\n", |
466 | p->reg_offset); | |
15ac7afe TL |
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) | |
1cbb3a9a BC |
490 | pr_err("mux: Unknown ball offset 0x%x\n", |
491 | b->reg_offset); | |
15ac7afe TL |
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 | ||
15ac7afe TL |
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) { | |
1cbb3a9a | 618 | pr_err("mux: Could not get gpio%i\n", gpio); |
15ac7afe TL |
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) { | |
1cbb3a9a | 632 | pr_err("mux: Could not set gpio%i\n", gpio); |
15ac7afe TL |
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 | ||
b72c7d54 RL |
675 | #ifdef CONFIG_OMAP_MUX |
676 | if (!superset->muxnames || !superset->muxnames[0]) { | |
15ac7afe TL |
677 | superset++; |
678 | continue; | |
679 | } | |
b72c7d54 RL |
680 | #else |
681 | /* Skip pins that are not muxed as GPIO by bootloader */ | |
682 | if (!OMAP_MODE_GPIO(omap_mux_read(superset->reg_offset))) { | |
9ecef433 TL |
683 | superset++; |
684 | continue; | |
685 | } | |
686 | #endif | |
687 | ||
15ac7afe TL |
688 | entry = omap_mux_list_add(superset); |
689 | if (!entry) { | |
1cbb3a9a | 690 | pr_err("mux: Could not add entry\n"); |
15ac7afe TL |
691 | return; |
692 | } | |
693 | superset++; | |
694 | } | |
695 | } | |
696 | ||
321cfc85 TL |
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 | ||
15ac7afe TL |
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 | ||
4b715efc | 738 | mux_phys = mux_pbase; |
15ac7afe TL |
739 | mux_base = ioremap(mux_pbase, mux_size); |
740 | if (!mux_base) { | |
1cbb3a9a | 741 | pr_err("mux: Could not ioremap\n"); |
15ac7afe TL |
742 | return -ENODEV; |
743 | } | |
744 | ||
d5425be6 TL |
745 | if (cpu_is_omap24xx()) |
746 | omap_mux_flags = MUXABLE_GPIO_MODE3; | |
747 | ||
321cfc85 | 748 | omap_mux_init_package(superset, package_subset, package_balls); |
15ac7afe | 749 | omap_mux_init_list(superset); |
321cfc85 | 750 | omap_mux_init_signals(board_mux); |
2cb0c54f | 751 | |
15ac7afe TL |
752 | return 0; |
753 | } | |
754 |