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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 | */ | |
1dbae815 TL |
26 | #include <linux/module.h> |
27 | #include <linux/init.h> | |
fced80c7 | 28 | #include <linux/io.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
1dbae815 | 30 | #include <linux/spinlock.h> |
15ac7afe | 31 | #include <linux/list.h> |
4b715efc TL |
32 | #include <linux/ctype.h> |
33 | #include <linux/debugfs.h> | |
34 | #include <linux/seq_file.h> | |
35 | #include <linux/uaccess.h> | |
1dbae815 | 36 | |
fced80c7 RK |
37 | #include <asm/system.h> |
38 | ||
ce491cf8 | 39 | #include <plat/control.h> |
1dbae815 | 40 | |
15ac7afe | 41 | #include "mux.h" |
1dbae815 | 42 | |
92c9f501 MR |
43 | #define OMAP_MUX_BASE_OFFSET 0x30 /* Offset from CTRL_BASE */ |
44 | #define OMAP_MUX_BASE_SZ 0x5ca | |
d5425be6 | 45 | #define MUXABLE_GPIO_MODE3 BIT(0) |
92c9f501 | 46 | |
15ac7afe TL |
47 | struct omap_mux_entry { |
48 | struct omap_mux mux; | |
49 | struct list_head node; | |
50 | }; | |
51 | ||
4b715efc | 52 | static unsigned long mux_phys; |
92c9f501 | 53 | static void __iomem *mux_base; |
d5425be6 | 54 | static u8 omap_mux_flags; |
92c9f501 | 55 | |
d4bb72e5 | 56 | u16 omap_mux_read(u16 reg) |
92c9f501 MR |
57 | { |
58 | if (cpu_is_omap24xx()) | |
59 | return __raw_readb(mux_base + reg); | |
60 | else | |
61 | return __raw_readw(mux_base + reg); | |
62 | } | |
63 | ||
d4bb72e5 | 64 | void omap_mux_write(u16 val, u16 reg) |
92c9f501 MR |
65 | { |
66 | if (cpu_is_omap24xx()) | |
67 | __raw_writeb(val, mux_base + reg); | |
68 | else | |
69 | __raw_writew(val, mux_base + reg); | |
70 | } | |
7d7f665d | 71 | |
d4bb72e5 TL |
72 | void omap_mux_write_array(struct omap_board_mux *board_mux) |
73 | { | |
74 | while (board_mux->reg_offset != OMAP_MUX_TERMINATOR) { | |
75 | omap_mux_write(board_mux->value, board_mux->reg_offset); | |
76 | board_mux++; | |
77 | } | |
78 | } | |
79 | ||
15ac7afe TL |
80 | static LIST_HEAD(muxmodes); |
81 | static DEFINE_MUTEX(muxmode_mutex); | |
82 | ||
83 | #ifdef CONFIG_OMAP_MUX | |
84 | ||
85 | static char *omap_mux_options; | |
86 | ||
87 | int __init omap_mux_init_gpio(int gpio, int val) | |
88 | { | |
89 | struct omap_mux_entry *e; | |
8a6f7e14 GI |
90 | struct omap_mux *gpio_mux; |
91 | u16 old_mode; | |
92 | u16 mux_mode; | |
15ac7afe TL |
93 | int found = 0; |
94 | ||
95 | if (!gpio) | |
96 | return -EINVAL; | |
97 | ||
98 | list_for_each_entry(e, &muxmodes, node) { | |
99 | struct omap_mux *m = &e->mux; | |
100 | if (gpio == m->gpio) { | |
8a6f7e14 | 101 | gpio_mux = m; |
15ac7afe TL |
102 | found++; |
103 | } | |
104 | } | |
105 | ||
8a6f7e14 GI |
106 | if (found == 0) { |
107 | printk(KERN_ERR "mux: Could not set gpio%i\n", gpio); | |
108 | return -ENODEV; | |
109 | } | |
15ac7afe TL |
110 | |
111 | if (found > 1) { | |
8a6f7e14 GI |
112 | printk(KERN_INFO "mux: Multiple gpio paths (%d) for gpio%i\n", |
113 | found, gpio); | |
15ac7afe TL |
114 | return -EINVAL; |
115 | } | |
116 | ||
8a6f7e14 GI |
117 | old_mode = omap_mux_read(gpio_mux->reg_offset); |
118 | mux_mode = val & ~(OMAP_MUX_NR_MODES - 1); | |
119 | if (omap_mux_flags & MUXABLE_GPIO_MODE3) | |
120 | mux_mode |= OMAP_MUX_MODE3; | |
121 | else | |
122 | mux_mode |= OMAP_MUX_MODE4; | |
123 | printk(KERN_DEBUG "mux: Setting signal %s.gpio%i 0x%04x -> 0x%04x\n", | |
124 | gpio_mux->muxnames[0], gpio, old_mode, mux_mode); | |
125 | omap_mux_write(mux_mode, gpio_mux->reg_offset); | |
15ac7afe | 126 | |
8a6f7e14 | 127 | return 0; |
15ac7afe TL |
128 | } |
129 | ||
130 | int __init omap_mux_init_signal(char *muxname, int val) | |
131 | { | |
132 | struct omap_mux_entry *e; | |
133 | char *m0_name = NULL, *mode_name = NULL; | |
134 | int found = 0; | |
135 | ||
136 | mode_name = strchr(muxname, '.'); | |
137 | if (mode_name) { | |
138 | *mode_name = '\0'; | |
139 | mode_name++; | |
140 | m0_name = muxname; | |
141 | } else { | |
142 | mode_name = muxname; | |
143 | } | |
144 | ||
145 | list_for_each_entry(e, &muxmodes, node) { | |
146 | struct omap_mux *m = &e->mux; | |
147 | char *m0_entry = m->muxnames[0]; | |
148 | int i; | |
149 | ||
150 | if (m0_name && strcmp(m0_name, m0_entry)) | |
151 | continue; | |
152 | ||
153 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) { | |
154 | char *mode_cur = m->muxnames[i]; | |
155 | ||
156 | if (!mode_cur) | |
157 | continue; | |
158 | ||
159 | if (!strcmp(mode_name, mode_cur)) { | |
160 | u16 old_mode; | |
161 | u16 mux_mode; | |
162 | ||
163 | old_mode = omap_mux_read(m->reg_offset); | |
164 | mux_mode = val | i; | |
165 | printk(KERN_DEBUG "mux: Setting signal " | |
166 | "%s.%s 0x%04x -> 0x%04x\n", | |
167 | m0_entry, muxname, old_mode, mux_mode); | |
168 | omap_mux_write(mux_mode, m->reg_offset); | |
169 | found++; | |
170 | } | |
171 | } | |
172 | } | |
173 | ||
174 | if (found == 1) | |
175 | return 0; | |
176 | ||
177 | if (found > 1) { | |
178 | printk(KERN_ERR "mux: Multiple signal paths (%i) for %s\n", | |
179 | found, muxname); | |
180 | return -EINVAL; | |
181 | } | |
182 | ||
183 | printk(KERN_ERR "mux: Could not set signal %s\n", muxname); | |
184 | ||
185 | return -ENODEV; | |
186 | } | |
187 | ||
4b715efc TL |
188 | #ifdef CONFIG_DEBUG_FS |
189 | ||
190 | #define OMAP_MUX_MAX_NR_FLAGS 10 | |
191 | #define OMAP_MUX_TEST_FLAG(val, mask) \ | |
192 | if (((val) & (mask)) == (mask)) { \ | |
193 | i++; \ | |
194 | flags[i] = #mask; \ | |
195 | } | |
196 | ||
197 | /* REVISIT: Add checking for non-optimal mux settings */ | |
198 | static inline void omap_mux_decode(struct seq_file *s, u16 val) | |
199 | { | |
200 | char *flags[OMAP_MUX_MAX_NR_FLAGS]; | |
78737ae1 | 201 | char mode[sizeof("OMAP_MUX_MODE") + 1]; |
4b715efc TL |
202 | int i = -1; |
203 | ||
204 | sprintf(mode, "OMAP_MUX_MODE%d", val & 0x7); | |
205 | i++; | |
206 | flags[i] = mode; | |
207 | ||
208 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_OFF_WAKEUPENABLE); | |
209 | if (val & OMAP_OFF_EN) { | |
210 | if (!(val & OMAP_OFFOUT_EN)) { | |
211 | if (!(val & OMAP_OFF_PULL_UP)) { | |
212 | OMAP_MUX_TEST_FLAG(val, | |
213 | OMAP_PIN_OFF_INPUT_PULLDOWN); | |
214 | } else { | |
215 | OMAP_MUX_TEST_FLAG(val, | |
216 | OMAP_PIN_OFF_INPUT_PULLUP); | |
217 | } | |
218 | } else { | |
219 | if (!(val & OMAP_OFFOUT_VAL)) { | |
220 | OMAP_MUX_TEST_FLAG(val, | |
221 | OMAP_PIN_OFF_OUTPUT_LOW); | |
222 | } else { | |
223 | OMAP_MUX_TEST_FLAG(val, | |
224 | OMAP_PIN_OFF_OUTPUT_HIGH); | |
225 | } | |
226 | } | |
227 | } | |
228 | ||
229 | if (val & OMAP_INPUT_EN) { | |
230 | if (val & OMAP_PULL_ENA) { | |
231 | if (!(val & OMAP_PULL_UP)) { | |
232 | OMAP_MUX_TEST_FLAG(val, | |
233 | OMAP_PIN_INPUT_PULLDOWN); | |
234 | } else { | |
235 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT_PULLUP); | |
236 | } | |
237 | } else { | |
238 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT); | |
239 | } | |
240 | } else { | |
241 | i++; | |
242 | flags[i] = "OMAP_PIN_OUTPUT"; | |
243 | } | |
244 | ||
245 | do { | |
246 | seq_printf(s, "%s", flags[i]); | |
247 | if (i > 0) | |
248 | seq_printf(s, " | "); | |
249 | } while (i-- > 0); | |
250 | } | |
251 | ||
252 | #define OMAP_MUX_DEFNAME_LEN 16 | |
253 | ||
254 | static int omap_mux_dbg_board_show(struct seq_file *s, void *unused) | |
255 | { | |
256 | struct omap_mux_entry *e; | |
257 | ||
258 | list_for_each_entry(e, &muxmodes, node) { | |
259 | struct omap_mux *m = &e->mux; | |
260 | char m0_def[OMAP_MUX_DEFNAME_LEN]; | |
261 | char *m0_name = m->muxnames[0]; | |
262 | u16 val; | |
263 | int i, mode; | |
264 | ||
265 | if (!m0_name) | |
266 | continue; | |
267 | ||
78737ae1 | 268 | /* REVISIT: Needs to be updated if mode0 names get longer */ |
4b715efc TL |
269 | for (i = 0; i < OMAP_MUX_DEFNAME_LEN; i++) { |
270 | if (m0_name[i] == '\0') { | |
271 | m0_def[i] = m0_name[i]; | |
272 | break; | |
273 | } | |
274 | m0_def[i] = toupper(m0_name[i]); | |
275 | } | |
276 | val = omap_mux_read(m->reg_offset); | |
277 | mode = val & OMAP_MUX_MODE7; | |
278 | ||
279 | seq_printf(s, "OMAP%i_MUX(%s, ", | |
280 | cpu_is_omap34xx() ? 3 : 0, m0_def); | |
281 | omap_mux_decode(s, val); | |
282 | seq_printf(s, "),\n"); | |
283 | } | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
288 | static int omap_mux_dbg_board_open(struct inode *inode, struct file *file) | |
289 | { | |
290 | return single_open(file, omap_mux_dbg_board_show, &inode->i_private); | |
291 | } | |
292 | ||
293 | static const struct file_operations omap_mux_dbg_board_fops = { | |
294 | .open = omap_mux_dbg_board_open, | |
295 | .read = seq_read, | |
296 | .llseek = seq_lseek, | |
297 | .release = single_release, | |
298 | }; | |
299 | ||
300 | static int omap_mux_dbg_signal_show(struct seq_file *s, void *unused) | |
301 | { | |
302 | struct omap_mux *m = s->private; | |
303 | const char *none = "NA"; | |
304 | u16 val; | |
305 | int mode; | |
306 | ||
307 | val = omap_mux_read(m->reg_offset); | |
308 | mode = val & OMAP_MUX_MODE7; | |
309 | ||
310 | seq_printf(s, "name: %s.%s (0x%08lx/0x%03x = 0x%04x), b %s, t %s\n", | |
311 | m->muxnames[0], m->muxnames[mode], | |
312 | mux_phys + m->reg_offset, m->reg_offset, val, | |
313 | m->balls[0] ? m->balls[0] : none, | |
314 | m->balls[1] ? m->balls[1] : none); | |
315 | seq_printf(s, "mode: "); | |
316 | omap_mux_decode(s, val); | |
317 | seq_printf(s, "\n"); | |
318 | seq_printf(s, "signals: %s | %s | %s | %s | %s | %s | %s | %s\n", | |
319 | m->muxnames[0] ? m->muxnames[0] : none, | |
320 | m->muxnames[1] ? m->muxnames[1] : none, | |
321 | m->muxnames[2] ? m->muxnames[2] : none, | |
322 | m->muxnames[3] ? m->muxnames[3] : none, | |
323 | m->muxnames[4] ? m->muxnames[4] : none, | |
324 | m->muxnames[5] ? m->muxnames[5] : none, | |
325 | m->muxnames[6] ? m->muxnames[6] : none, | |
326 | m->muxnames[7] ? m->muxnames[7] : none); | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
331 | #define OMAP_MUX_MAX_ARG_CHAR 7 | |
332 | ||
333 | static ssize_t omap_mux_dbg_signal_write(struct file *file, | |
334 | const char __user *user_buf, | |
335 | size_t count, loff_t *ppos) | |
336 | { | |
337 | char buf[OMAP_MUX_MAX_ARG_CHAR]; | |
338 | struct seq_file *seqf; | |
339 | struct omap_mux *m; | |
340 | unsigned long val; | |
341 | int buf_size, ret; | |
342 | ||
343 | if (count > OMAP_MUX_MAX_ARG_CHAR) | |
344 | return -EINVAL; | |
345 | ||
346 | memset(buf, 0, sizeof(buf)); | |
347 | buf_size = min(count, sizeof(buf) - 1); | |
348 | ||
349 | if (copy_from_user(buf, user_buf, buf_size)) | |
350 | return -EFAULT; | |
351 | ||
352 | ret = strict_strtoul(buf, 0x10, &val); | |
353 | if (ret < 0) | |
354 | return ret; | |
355 | ||
356 | if (val > 0xffff) | |
357 | return -EINVAL; | |
358 | ||
359 | seqf = file->private_data; | |
360 | m = seqf->private; | |
361 | ||
362 | omap_mux_write((u16)val, m->reg_offset); | |
363 | *ppos += count; | |
364 | ||
365 | return count; | |
366 | } | |
367 | ||
368 | static int omap_mux_dbg_signal_open(struct inode *inode, struct file *file) | |
369 | { | |
370 | return single_open(file, omap_mux_dbg_signal_show, inode->i_private); | |
371 | } | |
372 | ||
373 | static const struct file_operations omap_mux_dbg_signal_fops = { | |
374 | .open = omap_mux_dbg_signal_open, | |
375 | .read = seq_read, | |
376 | .write = omap_mux_dbg_signal_write, | |
377 | .llseek = seq_lseek, | |
378 | .release = single_release, | |
379 | }; | |
380 | ||
381 | static struct dentry *mux_dbg_dir; | |
382 | ||
383 | static void __init omap_mux_dbg_init(void) | |
384 | { | |
385 | struct omap_mux_entry *e; | |
386 | ||
387 | mux_dbg_dir = debugfs_create_dir("omap_mux", NULL); | |
388 | if (!mux_dbg_dir) | |
389 | return; | |
390 | ||
391 | (void)debugfs_create_file("board", S_IRUGO, mux_dbg_dir, | |
392 | NULL, &omap_mux_dbg_board_fops); | |
393 | ||
394 | list_for_each_entry(e, &muxmodes, node) { | |
395 | struct omap_mux *m = &e->mux; | |
396 | ||
397 | (void)debugfs_create_file(m->muxnames[0], S_IWUGO, mux_dbg_dir, | |
398 | m, &omap_mux_dbg_signal_fops); | |
399 | } | |
400 | } | |
401 | ||
402 | #else | |
403 | static inline void omap_mux_dbg_init(void) | |
404 | { | |
405 | } | |
406 | #endif /* CONFIG_DEBUG_FS */ | |
407 | ||
15ac7afe TL |
408 | static void __init omap_mux_free_names(struct omap_mux *m) |
409 | { | |
410 | int i; | |
411 | ||
412 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) | |
413 | kfree(m->muxnames[i]); | |
414 | ||
415 | #ifdef CONFIG_DEBUG_FS | |
416 | for (i = 0; i < OMAP_MUX_NR_SIDES; i++) | |
417 | kfree(m->balls[i]); | |
418 | #endif | |
419 | ||
420 | } | |
421 | ||
422 | /* Free all data except for GPIO pins unless CONFIG_DEBUG_FS is set */ | |
423 | static int __init omap_mux_late_init(void) | |
424 | { | |
425 | struct omap_mux_entry *e, *tmp; | |
426 | ||
427 | list_for_each_entry_safe(e, tmp, &muxmodes, node) { | |
428 | struct omap_mux *m = &e->mux; | |
429 | u16 mode = omap_mux_read(m->reg_offset); | |
430 | ||
431 | if (OMAP_MODE_GPIO(mode)) | |
432 | continue; | |
433 | ||
434 | #ifndef CONFIG_DEBUG_FS | |
435 | mutex_lock(&muxmode_mutex); | |
436 | list_del(&e->node); | |
437 | mutex_unlock(&muxmode_mutex); | |
438 | omap_mux_free_names(m); | |
439 | kfree(m); | |
1dbae815 | 440 | #endif |
15ac7afe TL |
441 | |
442 | } | |
443 | ||
4b715efc TL |
444 | omap_mux_dbg_init(); |
445 | ||
15ac7afe TL |
446 | return 0; |
447 | } | |
448 | late_initcall(omap_mux_late_init); | |
449 | ||
450 | static void __init omap_mux_package_fixup(struct omap_mux *p, | |
451 | struct omap_mux *superset) | |
452 | { | |
453 | while (p->reg_offset != OMAP_MUX_TERMINATOR) { | |
454 | struct omap_mux *s = superset; | |
455 | int found = 0; | |
456 | ||
457 | while (s->reg_offset != OMAP_MUX_TERMINATOR) { | |
458 | if (s->reg_offset == p->reg_offset) { | |
459 | *s = *p; | |
460 | found++; | |
461 | break; | |
462 | } | |
463 | s++; | |
464 | } | |
465 | if (!found) | |
466 | printk(KERN_ERR "mux: Unknown entry offset 0x%x\n", | |
467 | p->reg_offset); | |
468 | p++; | |
469 | } | |
470 | } | |
471 | ||
472 | #ifdef CONFIG_DEBUG_FS | |
473 | ||
474 | static void __init omap_mux_package_init_balls(struct omap_ball *b, | |
475 | struct omap_mux *superset) | |
476 | { | |
477 | while (b->reg_offset != OMAP_MUX_TERMINATOR) { | |
478 | struct omap_mux *s = superset; | |
479 | int found = 0; | |
480 | ||
481 | while (s->reg_offset != OMAP_MUX_TERMINATOR) { | |
482 | if (s->reg_offset == b->reg_offset) { | |
483 | s->balls[0] = b->balls[0]; | |
484 | s->balls[1] = b->balls[1]; | |
485 | found++; | |
486 | break; | |
487 | } | |
488 | s++; | |
489 | } | |
490 | if (!found) | |
491 | printk(KERN_ERR "mux: Unknown ball offset 0x%x\n", | |
492 | b->reg_offset); | |
493 | b++; | |
494 | } | |
495 | } | |
496 | ||
497 | #else /* CONFIG_DEBUG_FS */ | |
498 | ||
499 | static inline void omap_mux_package_init_balls(struct omap_ball *b, | |
500 | struct omap_mux *superset) | |
501 | { | |
502 | } | |
503 | ||
504 | #endif /* CONFIG_DEBUG_FS */ | |
505 | ||
506 | static int __init omap_mux_setup(char *options) | |
507 | { | |
508 | if (!options) | |
509 | return 0; | |
510 | ||
511 | omap_mux_options = options; | |
512 | ||
513 | return 1; | |
514 | } | |
515 | __setup("omap_mux=", omap_mux_setup); | |
516 | ||
517 | /* | |
518 | * Note that the omap_mux=some.signal1=0x1234,some.signal2=0x1234 | |
519 | * cmdline options only override the bootloader values. | |
520 | * During development, please enable CONFIG_DEBUG_FS, and use the | |
521 | * signal specific entries under debugfs. | |
522 | */ | |
523 | static void __init omap_mux_set_cmdline_signals(void) | |
524 | { | |
525 | char *options, *next_opt, *token; | |
526 | ||
527 | if (!omap_mux_options) | |
528 | return; | |
529 | ||
530 | options = kmalloc(strlen(omap_mux_options) + 1, GFP_KERNEL); | |
531 | if (!options) | |
532 | return; | |
533 | ||
534 | strcpy(options, omap_mux_options); | |
535 | next_opt = options; | |
536 | ||
537 | while ((token = strsep(&next_opt, ",")) != NULL) { | |
538 | char *keyval, *name; | |
539 | unsigned long val; | |
540 | ||
541 | keyval = token; | |
542 | name = strsep(&keyval, "="); | |
543 | if (name) { | |
544 | int res; | |
545 | ||
546 | res = strict_strtoul(keyval, 0x10, &val); | |
547 | if (res < 0) | |
548 | continue; | |
549 | ||
550 | omap_mux_init_signal(name, (u16)val); | |
551 | } | |
552 | } | |
553 | ||
554 | kfree(options); | |
555 | } | |
556 | ||
15ac7afe TL |
557 | static int __init omap_mux_copy_names(struct omap_mux *src, |
558 | struct omap_mux *dst) | |
559 | { | |
560 | int i; | |
561 | ||
562 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) { | |
563 | if (src->muxnames[i]) { | |
564 | dst->muxnames[i] = | |
565 | kmalloc(strlen(src->muxnames[i]) + 1, | |
566 | GFP_KERNEL); | |
567 | if (!dst->muxnames[i]) | |
568 | goto free; | |
569 | strcpy(dst->muxnames[i], src->muxnames[i]); | |
570 | } | |
571 | } | |
572 | ||
573 | #ifdef CONFIG_DEBUG_FS | |
574 | for (i = 0; i < OMAP_MUX_NR_SIDES; i++) { | |
575 | if (src->balls[i]) { | |
576 | dst->balls[i] = | |
577 | kmalloc(strlen(src->balls[i]) + 1, | |
578 | GFP_KERNEL); | |
579 | if (!dst->balls[i]) | |
580 | goto free; | |
581 | strcpy(dst->balls[i], src->balls[i]); | |
582 | } | |
583 | } | |
584 | #endif | |
585 | ||
586 | return 0; | |
587 | ||
588 | free: | |
589 | omap_mux_free_names(dst); | |
590 | return -ENOMEM; | |
591 | ||
592 | } | |
593 | ||
594 | #endif /* CONFIG_OMAP_MUX */ | |
595 | ||
596 | static u16 omap_mux_get_by_gpio(int gpio) | |
597 | { | |
598 | struct omap_mux_entry *e; | |
599 | u16 offset = OMAP_MUX_TERMINATOR; | |
600 | ||
601 | list_for_each_entry(e, &muxmodes, node) { | |
602 | struct omap_mux *m = &e->mux; | |
603 | if (m->gpio == gpio) { | |
604 | offset = m->reg_offset; | |
605 | break; | |
606 | } | |
607 | } | |
608 | ||
609 | return offset; | |
610 | } | |
611 | ||
612 | /* Needed for dynamic muxing of GPIO pins for off-idle */ | |
613 | u16 omap_mux_get_gpio(int gpio) | |
614 | { | |
615 | u16 offset; | |
616 | ||
617 | offset = omap_mux_get_by_gpio(gpio); | |
618 | if (offset == OMAP_MUX_TERMINATOR) { | |
619 | printk(KERN_ERR "mux: Could not get gpio%i\n", gpio); | |
620 | return offset; | |
621 | } | |
622 | ||
623 | return omap_mux_read(offset); | |
624 | } | |
625 | ||
626 | /* Needed for dynamic muxing of GPIO pins for off-idle */ | |
627 | void omap_mux_set_gpio(u16 val, int gpio) | |
628 | { | |
629 | u16 offset; | |
630 | ||
631 | offset = omap_mux_get_by_gpio(gpio); | |
632 | if (offset == OMAP_MUX_TERMINATOR) { | |
633 | printk(KERN_ERR "mux: Could not set gpio%i\n", gpio); | |
634 | return; | |
635 | } | |
636 | ||
637 | omap_mux_write(val, offset); | |
638 | } | |
639 | ||
640 | static struct omap_mux * __init omap_mux_list_add(struct omap_mux *src) | |
641 | { | |
642 | struct omap_mux_entry *entry; | |
643 | struct omap_mux *m; | |
644 | ||
645 | entry = kzalloc(sizeof(struct omap_mux_entry), GFP_KERNEL); | |
646 | if (!entry) | |
647 | return NULL; | |
648 | ||
649 | m = &entry->mux; | |
650 | memcpy(m, src, sizeof(struct omap_mux_entry)); | |
651 | ||
652 | #ifdef CONFIG_OMAP_MUX | |
653 | if (omap_mux_copy_names(src, m)) { | |
654 | kfree(entry); | |
655 | return NULL; | |
656 | } | |
657 | #endif | |
658 | ||
659 | mutex_lock(&muxmode_mutex); | |
660 | list_add_tail(&entry->node, &muxmodes); | |
661 | mutex_unlock(&muxmode_mutex); | |
662 | ||
663 | return m; | |
664 | } | |
665 | ||
666 | /* | |
667 | * Note if CONFIG_OMAP_MUX is not selected, we will only initialize | |
668 | * the GPIO to mux offset mapping that is needed for dynamic muxing | |
669 | * of GPIO pins for off-idle. | |
670 | */ | |
671 | static void __init omap_mux_init_list(struct omap_mux *superset) | |
672 | { | |
673 | while (superset->reg_offset != OMAP_MUX_TERMINATOR) { | |
674 | struct omap_mux *entry; | |
675 | ||
b72c7d54 RL |
676 | #ifdef CONFIG_OMAP_MUX |
677 | if (!superset->muxnames || !superset->muxnames[0]) { | |
15ac7afe TL |
678 | superset++; |
679 | continue; | |
680 | } | |
b72c7d54 RL |
681 | #else |
682 | /* Skip pins that are not muxed as GPIO by bootloader */ | |
683 | if (!OMAP_MODE_GPIO(omap_mux_read(superset->reg_offset))) { | |
9ecef433 TL |
684 | superset++; |
685 | continue; | |
686 | } | |
687 | #endif | |
688 | ||
15ac7afe TL |
689 | entry = omap_mux_list_add(superset); |
690 | if (!entry) { | |
691 | printk(KERN_ERR "mux: Could not add entry\n"); | |
692 | return; | |
693 | } | |
694 | superset++; | |
695 | } | |
696 | } | |
697 | ||
321cfc85 TL |
698 | #ifdef CONFIG_OMAP_MUX |
699 | ||
700 | static void omap_mux_init_package(struct omap_mux *superset, | |
701 | struct omap_mux *package_subset, | |
702 | struct omap_ball *package_balls) | |
703 | { | |
704 | if (package_subset) | |
705 | omap_mux_package_fixup(package_subset, superset); | |
706 | if (package_balls) | |
707 | omap_mux_package_init_balls(package_balls, superset); | |
708 | } | |
709 | ||
710 | static void omap_mux_init_signals(struct omap_board_mux *board_mux) | |
711 | { | |
712 | omap_mux_set_cmdline_signals(); | |
713 | omap_mux_write_array(board_mux); | |
714 | } | |
715 | ||
716 | #else | |
717 | ||
718 | static void omap_mux_init_package(struct omap_mux *superset, | |
719 | struct omap_mux *package_subset, | |
720 | struct omap_ball *package_balls) | |
721 | { | |
722 | } | |
723 | ||
724 | static void omap_mux_init_signals(struct omap_board_mux *board_mux) | |
725 | { | |
726 | } | |
727 | ||
728 | #endif | |
729 | ||
15ac7afe TL |
730 | int __init omap_mux_init(u32 mux_pbase, u32 mux_size, |
731 | struct omap_mux *superset, | |
732 | struct omap_mux *package_subset, | |
733 | struct omap_board_mux *board_mux, | |
734 | struct omap_ball *package_balls) | |
735 | { | |
736 | if (mux_base) | |
737 | return -EBUSY; | |
738 | ||
4b715efc | 739 | mux_phys = mux_pbase; |
15ac7afe TL |
740 | mux_base = ioremap(mux_pbase, mux_size); |
741 | if (!mux_base) { | |
742 | printk(KERN_ERR "mux: Could not ioremap\n"); | |
743 | return -ENODEV; | |
744 | } | |
745 | ||
d5425be6 TL |
746 | if (cpu_is_omap24xx()) |
747 | omap_mux_flags = MUXABLE_GPIO_MODE3; | |
748 | ||
321cfc85 | 749 | omap_mux_init_package(superset, package_subset, package_balls); |
15ac7afe | 750 | omap_mux_init_list(superset); |
321cfc85 | 751 | omap_mux_init_signals(board_mux); |
2cb0c54f | 752 | |
15ac7afe TL |
753 | return 0; |
754 | } | |
755 |