Commit | Line | Data |
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1dbae815 TL |
1 | /* |
2 | * linux/arch/arm/mach-omap2/mux.c | |
3 | * | |
112485e9 | 4 | * OMAP2, OMAP3 and OMAP4 pin multiplexing configurations |
1dbae815 | 5 | * |
112485e9 | 6 | * Copyright (C) 2004 - 2010 Texas Instruments Inc. |
9330899e | 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 | ||
9796b323 TL |
38 | #include <plat/omap_hwmod.h> |
39 | ||
4814ced5 | 40 | #include "control.h" |
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 | |
45 | ||
15ac7afe TL |
46 | struct omap_mux_entry { |
47 | struct omap_mux mux; | |
48 | struct list_head node; | |
49 | }; | |
50 | ||
112485e9 BC |
51 | static LIST_HEAD(mux_partitions); |
52 | static DEFINE_MUTEX(muxmode_mutex); | |
53 | ||
54 | struct omap_mux_partition *omap_mux_get(const char *name) | |
55 | { | |
56 | struct omap_mux_partition *partition; | |
57 | ||
58 | list_for_each_entry(partition, &mux_partitions, node) { | |
59 | if (!strcmp(name, partition->name)) | |
60 | return partition; | |
61 | } | |
92c9f501 | 62 | |
112485e9 BC |
63 | return NULL; |
64 | } | |
65 | ||
66 | u16 omap_mux_read(struct omap_mux_partition *partition, u16 reg) | |
92c9f501 | 67 | { |
112485e9 BC |
68 | if (partition->flags & OMAP_MUX_REG_8BIT) |
69 | return __raw_readb(partition->base + reg); | |
92c9f501 | 70 | else |
112485e9 | 71 | return __raw_readw(partition->base + reg); |
92c9f501 MR |
72 | } |
73 | ||
112485e9 BC |
74 | void omap_mux_write(struct omap_mux_partition *partition, u16 val, |
75 | u16 reg) | |
92c9f501 | 76 | { |
112485e9 BC |
77 | if (partition->flags & OMAP_MUX_REG_8BIT) |
78 | __raw_writeb(val, partition->base + reg); | |
92c9f501 | 79 | else |
112485e9 | 80 | __raw_writew(val, partition->base + reg); |
92c9f501 | 81 | } |
7d7f665d | 82 | |
112485e9 BC |
83 | void omap_mux_write_array(struct omap_mux_partition *partition, |
84 | struct omap_board_mux *board_mux) | |
d4bb72e5 | 85 | { |
112485e9 BC |
86 | while (board_mux->reg_offset != OMAP_MUX_TERMINATOR) { |
87 | omap_mux_write(partition, board_mux->value, | |
88 | board_mux->reg_offset); | |
d4bb72e5 TL |
89 | board_mux++; |
90 | } | |
91 | } | |
92 | ||
15ac7afe TL |
93 | #ifdef CONFIG_OMAP_MUX |
94 | ||
95 | static char *omap_mux_options; | |
96 | ||
112485e9 BC |
97 | static int __init _omap_mux_init_gpio(struct omap_mux_partition *partition, |
98 | int gpio, int val) | |
15ac7afe TL |
99 | { |
100 | struct omap_mux_entry *e; | |
ca828760 | 101 | struct omap_mux *gpio_mux = NULL; |
8a6f7e14 GI |
102 | u16 old_mode; |
103 | u16 mux_mode; | |
15ac7afe | 104 | int found = 0; |
112485e9 | 105 | struct list_head *muxmodes = &partition->muxmodes; |
15ac7afe TL |
106 | |
107 | if (!gpio) | |
108 | return -EINVAL; | |
109 | ||
112485e9 | 110 | list_for_each_entry(e, muxmodes, node) { |
15ac7afe TL |
111 | struct omap_mux *m = &e->mux; |
112 | if (gpio == m->gpio) { | |
8a6f7e14 | 113 | gpio_mux = m; |
15ac7afe TL |
114 | found++; |
115 | } | |
116 | } | |
117 | ||
8a6f7e14 | 118 | if (found == 0) { |
032a6424 | 119 | pr_err("%s: Could not set gpio%i\n", __func__, gpio); |
8a6f7e14 GI |
120 | return -ENODEV; |
121 | } | |
15ac7afe TL |
122 | |
123 | if (found > 1) { | |
032a6424 | 124 | pr_info("%s: Multiple gpio paths (%d) for gpio%i\n", __func__, |
1cbb3a9a | 125 | found, gpio); |
15ac7afe TL |
126 | return -EINVAL; |
127 | } | |
128 | ||
112485e9 | 129 | old_mode = omap_mux_read(partition, gpio_mux->reg_offset); |
8a6f7e14 | 130 | mux_mode = val & ~(OMAP_MUX_NR_MODES - 1); |
112485e9 | 131 | if (partition->flags & OMAP_MUX_GPIO_IN_MODE3) |
8a6f7e14 GI |
132 | mux_mode |= OMAP_MUX_MODE3; |
133 | else | |
134 | mux_mode |= OMAP_MUX_MODE4; | |
032a6424 | 135 | pr_debug("%s: Setting signal %s.gpio%i 0x%04x -> 0x%04x\n", __func__, |
1cbb3a9a | 136 | gpio_mux->muxnames[0], gpio, old_mode, mux_mode); |
112485e9 | 137 | omap_mux_write(partition, mux_mode, gpio_mux->reg_offset); |
15ac7afe | 138 | |
8a6f7e14 | 139 | return 0; |
15ac7afe TL |
140 | } |
141 | ||
112485e9 BC |
142 | int __init omap_mux_init_gpio(int gpio, int val) |
143 | { | |
144 | struct omap_mux_partition *partition; | |
145 | int ret; | |
146 | ||
147 | list_for_each_entry(partition, &mux_partitions, node) { | |
148 | ret = _omap_mux_init_gpio(partition, gpio, val); | |
149 | if (!ret) | |
150 | return ret; | |
151 | } | |
152 | ||
153 | return -ENODEV; | |
154 | } | |
155 | ||
8419fdba TL |
156 | static int __init _omap_mux_get_by_name(struct omap_mux_partition *partition, |
157 | const char *muxname, | |
158 | struct omap_mux **found_mux) | |
15ac7afe | 159 | { |
8419fdba | 160 | struct omap_mux *mux = NULL; |
15ac7afe | 161 | struct omap_mux_entry *e; |
5a3b2f7a | 162 | const char *mode_name; |
afb7d709 | 163 | int found = 0, found_mode = 0, mode0_len = 0; |
112485e9 | 164 | struct list_head *muxmodes = &partition->muxmodes; |
15ac7afe TL |
165 | |
166 | mode_name = strchr(muxname, '.'); | |
167 | if (mode_name) { | |
5a3b2f7a | 168 | mode0_len = strlen(muxname) - strlen(mode_name); |
15ac7afe | 169 | mode_name++; |
15ac7afe TL |
170 | } else { |
171 | mode_name = muxname; | |
172 | } | |
173 | ||
112485e9 | 174 | list_for_each_entry(e, muxmodes, node) { |
8419fdba | 175 | char *m0_entry; |
15ac7afe TL |
176 | int i; |
177 | ||
8419fdba TL |
178 | mux = &e->mux; |
179 | m0_entry = mux->muxnames[0]; | |
180 | ||
5a3b2f7a TL |
181 | /* First check for full name in mode0.muxmode format */ |
182 | if (mode0_len && strncmp(muxname, m0_entry, mode0_len)) | |
15ac7afe TL |
183 | continue; |
184 | ||
5a3b2f7a | 185 | /* Then check for muxmode only */ |
15ac7afe | 186 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) { |
8419fdba | 187 | char *mode_cur = mux->muxnames[i]; |
15ac7afe TL |
188 | |
189 | if (!mode_cur) | |
190 | continue; | |
191 | ||
192 | if (!strcmp(mode_name, mode_cur)) { | |
8419fdba | 193 | *found_mux = mux; |
15ac7afe | 194 | found++; |
8419fdba | 195 | found_mode = i; |
15ac7afe TL |
196 | } |
197 | } | |
198 | } | |
199 | ||
8419fdba TL |
200 | if (found == 1) { |
201 | return found_mode; | |
202 | } | |
15ac7afe TL |
203 | |
204 | if (found > 1) { | |
032a6424 | 205 | pr_err("%s: Multiple signal paths (%i) for %s\n", __func__, |
1cbb3a9a | 206 | found, muxname); |
15ac7afe TL |
207 | return -EINVAL; |
208 | } | |
209 | ||
8419fdba | 210 | pr_err("%s: Could not find signal %s\n", __func__, muxname); |
15ac7afe TL |
211 | |
212 | return -ENODEV; | |
213 | } | |
214 | ||
8419fdba TL |
215 | static int __init |
216 | omap_mux_get_by_name(const char *muxname, | |
217 | struct omap_mux_partition **found_partition, | |
218 | struct omap_mux **found_mux) | |
112485e9 BC |
219 | { |
220 | struct omap_mux_partition *partition; | |
112485e9 BC |
221 | |
222 | list_for_each_entry(partition, &mux_partitions, node) { | |
8419fdba TL |
223 | struct omap_mux *mux = NULL; |
224 | int mux_mode = _omap_mux_get_by_name(partition, muxname, &mux); | |
225 | if (mux_mode < 0) | |
226 | continue; | |
227 | ||
228 | *found_partition = partition; | |
229 | *found_mux = mux; | |
230 | ||
231 | return mux_mode; | |
112485e9 BC |
232 | } |
233 | ||
234 | return -ENODEV; | |
8419fdba | 235 | } |
112485e9 | 236 | |
8419fdba TL |
237 | int __init omap_mux_init_signal(const char *muxname, int val) |
238 | { | |
239 | struct omap_mux_partition *partition = NULL; | |
240 | struct omap_mux *mux = NULL; | |
241 | u16 old_mode; | |
242 | int mux_mode; | |
243 | ||
244 | mux_mode = omap_mux_get_by_name(muxname, &partition, &mux); | |
245 | if (mux_mode < 0) | |
246 | return mux_mode; | |
247 | ||
248 | old_mode = omap_mux_read(partition, mux->reg_offset); | |
249 | mux_mode |= val; | |
250 | pr_debug("%s: Setting signal %s 0x%04x -> 0x%04x\n", | |
251 | __func__, muxname, old_mode, mux_mode); | |
252 | omap_mux_write(partition, mux_mode, mux->reg_offset); | |
253 | ||
254 | return 0; | |
112485e9 BC |
255 | } |
256 | ||
9796b323 TL |
257 | struct omap_hwmod_mux_info * __init |
258 | omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads) | |
259 | { | |
260 | struct omap_hwmod_mux_info *hmux; | |
029268e4 | 261 | int i, nr_pads_dynamic = 0; |
9796b323 TL |
262 | |
263 | if (!bpads || nr_pads < 1) | |
264 | return NULL; | |
265 | ||
266 | hmux = kzalloc(sizeof(struct omap_hwmod_mux_info), GFP_KERNEL); | |
267 | if (!hmux) | |
268 | goto err1; | |
269 | ||
270 | hmux->nr_pads = nr_pads; | |
271 | ||
272 | hmux->pads = kzalloc(sizeof(struct omap_device_pad) * | |
273 | nr_pads, GFP_KERNEL); | |
274 | if (!hmux->pads) | |
275 | goto err2; | |
276 | ||
277 | for (i = 0; i < hmux->nr_pads; i++) { | |
278 | struct omap_mux_partition *partition; | |
279 | struct omap_device_pad *bpad = &bpads[i], *pad = &hmux->pads[i]; | |
280 | struct omap_mux *mux; | |
281 | int mux_mode; | |
282 | ||
283 | mux_mode = omap_mux_get_by_name(bpad->name, &partition, &mux); | |
284 | if (mux_mode < 0) | |
285 | goto err3; | |
286 | if (!pad->partition) | |
287 | pad->partition = partition; | |
288 | if (!pad->mux) | |
289 | pad->mux = mux; | |
290 | ||
291 | pad->name = kzalloc(strlen(bpad->name) + 1, GFP_KERNEL); | |
292 | if (!pad->name) { | |
293 | int j; | |
294 | ||
295 | for (j = i - 1; j >= 0; j--) | |
296 | kfree(hmux->pads[j].name); | |
297 | goto err3; | |
298 | } | |
299 | strcpy(pad->name, bpad->name); | |
300 | ||
301 | pad->flags = bpad->flags; | |
302 | pad->enable = bpad->enable; | |
303 | pad->idle = bpad->idle; | |
304 | pad->off = bpad->off; | |
029268e4 TL |
305 | |
306 | if (pad->flags & OMAP_DEVICE_PAD_REMUX) | |
307 | nr_pads_dynamic++; | |
308 | ||
9796b323 TL |
309 | pr_debug("%s: Initialized %s\n", __func__, pad->name); |
310 | } | |
311 | ||
029268e4 TL |
312 | if (!nr_pads_dynamic) |
313 | return hmux; | |
314 | ||
315 | /* | |
316 | * Add pads that need dynamic muxing into a separate list | |
317 | */ | |
318 | ||
319 | hmux->nr_pads_dynamic = nr_pads_dynamic; | |
320 | hmux->pads_dynamic = kzalloc(sizeof(struct omap_device_pad *) * | |
321 | nr_pads_dynamic, GFP_KERNEL); | |
322 | if (!hmux->pads_dynamic) { | |
323 | pr_err("%s: Could not allocate dynamic pads\n", __func__); | |
324 | return hmux; | |
325 | } | |
326 | ||
327 | nr_pads_dynamic = 0; | |
328 | for (i = 0; i < hmux->nr_pads; i++) { | |
329 | struct omap_device_pad *pad = &hmux->pads[i]; | |
330 | ||
331 | if (pad->flags & OMAP_DEVICE_PAD_REMUX) { | |
332 | pr_debug("%s: pad %s tagged dynamic\n", | |
333 | __func__, pad->name); | |
334 | hmux->pads_dynamic[nr_pads_dynamic] = pad; | |
335 | nr_pads_dynamic++; | |
336 | } | |
337 | } | |
338 | ||
9796b323 TL |
339 | return hmux; |
340 | ||
341 | err3: | |
342 | kfree(hmux->pads); | |
343 | err2: | |
344 | kfree(hmux); | |
345 | err1: | |
346 | pr_err("%s: Could not allocate device mux entry\n", __func__); | |
347 | ||
348 | return NULL; | |
349 | } | |
350 | ||
8d9af88f TL |
351 | /* Assumes the calling function takes care of locking */ |
352 | void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state) | |
353 | { | |
354 | int i; | |
355 | ||
029268e4 TL |
356 | /* Runtime idling of dynamic pads */ |
357 | if (state == _HWMOD_STATE_IDLE && hmux->enabled) { | |
358 | for (i = 0; i < hmux->nr_pads_dynamic; i++) { | |
359 | struct omap_device_pad *pad = hmux->pads_dynamic[i]; | |
360 | int val = -EINVAL; | |
361 | ||
362 | pad->flags |= OMAP_DEVICE_PAD_IDLE; | |
363 | val = pad->idle; | |
364 | omap_mux_write(pad->partition, val, | |
365 | pad->mux->reg_offset); | |
366 | } | |
367 | ||
368 | return; | |
369 | } | |
370 | ||
371 | /* Runtime enabling of dynamic pads */ | |
372 | if ((state == _HWMOD_STATE_ENABLED) && hmux->pads_dynamic) { | |
373 | int idled = 0; | |
374 | ||
375 | for (i = 0; i < hmux->nr_pads_dynamic; i++) { | |
376 | struct omap_device_pad *pad = hmux->pads_dynamic[i]; | |
377 | int val = -EINVAL; | |
378 | ||
379 | if (!(pad->flags & OMAP_DEVICE_PAD_IDLE)) | |
380 | continue; | |
381 | ||
382 | pad->flags &= ~OMAP_DEVICE_PAD_IDLE; | |
383 | val = pad->enable; | |
384 | omap_mux_write(pad->partition, val, | |
385 | pad->mux->reg_offset); | |
386 | idled++; | |
387 | } | |
388 | ||
389 | if (idled) | |
390 | return; | |
391 | } | |
392 | ||
393 | /* Enabling or disabling of all pads */ | |
8d9af88f TL |
394 | for (i = 0; i < hmux->nr_pads; i++) { |
395 | struct omap_device_pad *pad = &hmux->pads[i]; | |
396 | int flags, val = -EINVAL; | |
397 | ||
398 | flags = pad->flags; | |
399 | ||
400 | switch (state) { | |
401 | case _HWMOD_STATE_ENABLED: | |
8d9af88f TL |
402 | val = pad->enable; |
403 | pr_debug("%s: Enabling %s %x\n", __func__, | |
404 | pad->name, val); | |
405 | break; | |
8d9af88f TL |
406 | case _HWMOD_STATE_DISABLED: |
407 | default: | |
408 | /* Use safe mode unless OMAP_DEVICE_PAD_REMUX */ | |
409 | if (flags & OMAP_DEVICE_PAD_REMUX) | |
410 | val = pad->off; | |
411 | else | |
412 | val = OMAP_MUX_MODE7; | |
8d9af88f TL |
413 | pr_debug("%s: Disabling %s %x\n", __func__, |
414 | pad->name, val); | |
415 | }; | |
416 | ||
417 | if (val >= 0) { | |
418 | omap_mux_write(pad->partition, val, | |
419 | pad->mux->reg_offset); | |
420 | pad->flags = flags; | |
421 | } | |
422 | } | |
029268e4 TL |
423 | |
424 | if (state == _HWMOD_STATE_ENABLED) | |
425 | hmux->enabled = true; | |
426 | else | |
427 | hmux->enabled = false; | |
8d9af88f TL |
428 | } |
429 | ||
4b715efc TL |
430 | #ifdef CONFIG_DEBUG_FS |
431 | ||
432 | #define OMAP_MUX_MAX_NR_FLAGS 10 | |
433 | #define OMAP_MUX_TEST_FLAG(val, mask) \ | |
434 | if (((val) & (mask)) == (mask)) { \ | |
435 | i++; \ | |
436 | flags[i] = #mask; \ | |
437 | } | |
438 | ||
439 | /* REVISIT: Add checking for non-optimal mux settings */ | |
440 | static inline void omap_mux_decode(struct seq_file *s, u16 val) | |
441 | { | |
442 | char *flags[OMAP_MUX_MAX_NR_FLAGS]; | |
78737ae1 | 443 | char mode[sizeof("OMAP_MUX_MODE") + 1]; |
4b715efc TL |
444 | int i = -1; |
445 | ||
446 | sprintf(mode, "OMAP_MUX_MODE%d", val & 0x7); | |
447 | i++; | |
448 | flags[i] = mode; | |
449 | ||
450 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_OFF_WAKEUPENABLE); | |
451 | if (val & OMAP_OFF_EN) { | |
452 | if (!(val & OMAP_OFFOUT_EN)) { | |
453 | if (!(val & OMAP_OFF_PULL_UP)) { | |
454 | OMAP_MUX_TEST_FLAG(val, | |
455 | OMAP_PIN_OFF_INPUT_PULLDOWN); | |
456 | } else { | |
457 | OMAP_MUX_TEST_FLAG(val, | |
458 | OMAP_PIN_OFF_INPUT_PULLUP); | |
459 | } | |
460 | } else { | |
461 | if (!(val & OMAP_OFFOUT_VAL)) { | |
462 | OMAP_MUX_TEST_FLAG(val, | |
463 | OMAP_PIN_OFF_OUTPUT_LOW); | |
464 | } else { | |
465 | OMAP_MUX_TEST_FLAG(val, | |
466 | OMAP_PIN_OFF_OUTPUT_HIGH); | |
467 | } | |
468 | } | |
469 | } | |
470 | ||
471 | if (val & OMAP_INPUT_EN) { | |
472 | if (val & OMAP_PULL_ENA) { | |
473 | if (!(val & OMAP_PULL_UP)) { | |
474 | OMAP_MUX_TEST_FLAG(val, | |
475 | OMAP_PIN_INPUT_PULLDOWN); | |
476 | } else { | |
477 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT_PULLUP); | |
478 | } | |
479 | } else { | |
480 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT); | |
481 | } | |
482 | } else { | |
483 | i++; | |
484 | flags[i] = "OMAP_PIN_OUTPUT"; | |
485 | } | |
486 | ||
487 | do { | |
488 | seq_printf(s, "%s", flags[i]); | |
489 | if (i > 0) | |
490 | seq_printf(s, " | "); | |
491 | } while (i-- > 0); | |
492 | } | |
493 | ||
112485e9 | 494 | #define OMAP_MUX_DEFNAME_LEN 32 |
4b715efc TL |
495 | |
496 | static int omap_mux_dbg_board_show(struct seq_file *s, void *unused) | |
497 | { | |
112485e9 | 498 | struct omap_mux_partition *partition = s->private; |
4b715efc | 499 | struct omap_mux_entry *e; |
112485e9 | 500 | u8 omap_gen = omap_rev() >> 28; |
4b715efc | 501 | |
112485e9 | 502 | list_for_each_entry(e, &partition->muxmodes, node) { |
4b715efc TL |
503 | struct omap_mux *m = &e->mux; |
504 | char m0_def[OMAP_MUX_DEFNAME_LEN]; | |
505 | char *m0_name = m->muxnames[0]; | |
506 | u16 val; | |
507 | int i, mode; | |
508 | ||
509 | if (!m0_name) | |
510 | continue; | |
511 | ||
78737ae1 | 512 | /* REVISIT: Needs to be updated if mode0 names get longer */ |
4b715efc TL |
513 | for (i = 0; i < OMAP_MUX_DEFNAME_LEN; i++) { |
514 | if (m0_name[i] == '\0') { | |
515 | m0_def[i] = m0_name[i]; | |
516 | break; | |
517 | } | |
518 | m0_def[i] = toupper(m0_name[i]); | |
519 | } | |
112485e9 | 520 | val = omap_mux_read(partition, m->reg_offset); |
4b715efc | 521 | mode = val & OMAP_MUX_MODE7; |
112485e9 BC |
522 | if (mode != 0) |
523 | seq_printf(s, "/* %s */\n", m->muxnames[mode]); | |
524 | ||
525 | /* | |
526 | * XXX: Might be revisited to support differences accross | |
527 | * same OMAP generation. | |
528 | */ | |
529 | seq_printf(s, "OMAP%d_MUX(%s, ", omap_gen, m0_def); | |
4b715efc TL |
530 | omap_mux_decode(s, val); |
531 | seq_printf(s, "),\n"); | |
532 | } | |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
537 | static int omap_mux_dbg_board_open(struct inode *inode, struct file *file) | |
538 | { | |
112485e9 | 539 | return single_open(file, omap_mux_dbg_board_show, inode->i_private); |
4b715efc TL |
540 | } |
541 | ||
542 | static const struct file_operations omap_mux_dbg_board_fops = { | |
543 | .open = omap_mux_dbg_board_open, | |
544 | .read = seq_read, | |
545 | .llseek = seq_lseek, | |
546 | .release = single_release, | |
547 | }; | |
548 | ||
112485e9 BC |
549 | static struct omap_mux_partition *omap_mux_get_partition(struct omap_mux *mux) |
550 | { | |
551 | struct omap_mux_partition *partition; | |
552 | ||
553 | list_for_each_entry(partition, &mux_partitions, node) { | |
554 | struct list_head *muxmodes = &partition->muxmodes; | |
555 | struct omap_mux_entry *e; | |
556 | ||
557 | list_for_each_entry(e, muxmodes, node) { | |
558 | struct omap_mux *m = &e->mux; | |
559 | ||
560 | if (m == mux) | |
561 | return partition; | |
562 | } | |
563 | } | |
564 | ||
565 | return NULL; | |
566 | } | |
567 | ||
4b715efc TL |
568 | static int omap_mux_dbg_signal_show(struct seq_file *s, void *unused) |
569 | { | |
570 | struct omap_mux *m = s->private; | |
112485e9 | 571 | struct omap_mux_partition *partition; |
4b715efc TL |
572 | const char *none = "NA"; |
573 | u16 val; | |
574 | int mode; | |
575 | ||
112485e9 BC |
576 | partition = omap_mux_get_partition(m); |
577 | if (!partition) | |
578 | return 0; | |
579 | ||
580 | val = omap_mux_read(partition, m->reg_offset); | |
4b715efc TL |
581 | mode = val & OMAP_MUX_MODE7; |
582 | ||
112485e9 | 583 | seq_printf(s, "name: %s.%s (0x%08x/0x%03x = 0x%04x), b %s, t %s\n", |
4b715efc | 584 | m->muxnames[0], m->muxnames[mode], |
112485e9 | 585 | partition->phys + m->reg_offset, m->reg_offset, val, |
4b715efc TL |
586 | m->balls[0] ? m->balls[0] : none, |
587 | m->balls[1] ? m->balls[1] : none); | |
588 | seq_printf(s, "mode: "); | |
589 | omap_mux_decode(s, val); | |
590 | seq_printf(s, "\n"); | |
591 | seq_printf(s, "signals: %s | %s | %s | %s | %s | %s | %s | %s\n", | |
592 | m->muxnames[0] ? m->muxnames[0] : none, | |
593 | m->muxnames[1] ? m->muxnames[1] : none, | |
594 | m->muxnames[2] ? m->muxnames[2] : none, | |
595 | m->muxnames[3] ? m->muxnames[3] : none, | |
596 | m->muxnames[4] ? m->muxnames[4] : none, | |
597 | m->muxnames[5] ? m->muxnames[5] : none, | |
598 | m->muxnames[6] ? m->muxnames[6] : none, | |
599 | m->muxnames[7] ? m->muxnames[7] : none); | |
600 | ||
601 | return 0; | |
602 | } | |
603 | ||
604 | #define OMAP_MUX_MAX_ARG_CHAR 7 | |
605 | ||
606 | static ssize_t omap_mux_dbg_signal_write(struct file *file, | |
112485e9 BC |
607 | const char __user *user_buf, |
608 | size_t count, loff_t *ppos) | |
4b715efc TL |
609 | { |
610 | char buf[OMAP_MUX_MAX_ARG_CHAR]; | |
611 | struct seq_file *seqf; | |
612 | struct omap_mux *m; | |
613 | unsigned long val; | |
614 | int buf_size, ret; | |
112485e9 | 615 | struct omap_mux_partition *partition; |
4b715efc TL |
616 | |
617 | if (count > OMAP_MUX_MAX_ARG_CHAR) | |
618 | return -EINVAL; | |
619 | ||
620 | memset(buf, 0, sizeof(buf)); | |
621 | buf_size = min(count, sizeof(buf) - 1); | |
622 | ||
623 | if (copy_from_user(buf, user_buf, buf_size)) | |
624 | return -EFAULT; | |
625 | ||
626 | ret = strict_strtoul(buf, 0x10, &val); | |
627 | if (ret < 0) | |
628 | return ret; | |
629 | ||
630 | if (val > 0xffff) | |
631 | return -EINVAL; | |
632 | ||
633 | seqf = file->private_data; | |
634 | m = seqf->private; | |
635 | ||
112485e9 BC |
636 | partition = omap_mux_get_partition(m); |
637 | if (!partition) | |
638 | return -ENODEV; | |
639 | ||
640 | omap_mux_write(partition, (u16)val, m->reg_offset); | |
4b715efc TL |
641 | *ppos += count; |
642 | ||
643 | return count; | |
644 | } | |
645 | ||
646 | static int omap_mux_dbg_signal_open(struct inode *inode, struct file *file) | |
647 | { | |
648 | return single_open(file, omap_mux_dbg_signal_show, inode->i_private); | |
649 | } | |
650 | ||
651 | static const struct file_operations omap_mux_dbg_signal_fops = { | |
652 | .open = omap_mux_dbg_signal_open, | |
653 | .read = seq_read, | |
654 | .write = omap_mux_dbg_signal_write, | |
655 | .llseek = seq_lseek, | |
656 | .release = single_release, | |
657 | }; | |
658 | ||
659 | static struct dentry *mux_dbg_dir; | |
660 | ||
112485e9 BC |
661 | static void __init omap_mux_dbg_create_entry( |
662 | struct omap_mux_partition *partition, | |
663 | struct dentry *mux_dbg_dir) | |
4b715efc TL |
664 | { |
665 | struct omap_mux_entry *e; | |
666 | ||
112485e9 BC |
667 | list_for_each_entry(e, &partition->muxmodes, node) { |
668 | struct omap_mux *m = &e->mux; | |
669 | ||
9b12771a | 670 | (void)debugfs_create_file(m->muxnames[0], S_IWUSR, mux_dbg_dir, |
112485e9 BC |
671 | m, &omap_mux_dbg_signal_fops); |
672 | } | |
673 | } | |
674 | ||
675 | static void __init omap_mux_dbg_init(void) | |
676 | { | |
677 | struct omap_mux_partition *partition; | |
678 | static struct dentry *mux_dbg_board_dir; | |
679 | ||
4b715efc TL |
680 | mux_dbg_dir = debugfs_create_dir("omap_mux", NULL); |
681 | if (!mux_dbg_dir) | |
682 | return; | |
683 | ||
112485e9 BC |
684 | mux_dbg_board_dir = debugfs_create_dir("board", mux_dbg_dir); |
685 | if (!mux_dbg_board_dir) | |
686 | return; | |
4b715efc | 687 | |
112485e9 BC |
688 | list_for_each_entry(partition, &mux_partitions, node) { |
689 | omap_mux_dbg_create_entry(partition, mux_dbg_dir); | |
690 | (void)debugfs_create_file(partition->name, S_IRUGO, | |
691 | mux_dbg_board_dir, partition, | |
692 | &omap_mux_dbg_board_fops); | |
4b715efc TL |
693 | } |
694 | } | |
695 | ||
696 | #else | |
697 | static inline void omap_mux_dbg_init(void) | |
698 | { | |
699 | } | |
700 | #endif /* CONFIG_DEBUG_FS */ | |
701 | ||
15ac7afe TL |
702 | static void __init omap_mux_free_names(struct omap_mux *m) |
703 | { | |
704 | int i; | |
705 | ||
706 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) | |
707 | kfree(m->muxnames[i]); | |
708 | ||
709 | #ifdef CONFIG_DEBUG_FS | |
710 | for (i = 0; i < OMAP_MUX_NR_SIDES; i++) | |
711 | kfree(m->balls[i]); | |
712 | #endif | |
713 | ||
714 | } | |
715 | ||
716 | /* Free all data except for GPIO pins unless CONFIG_DEBUG_FS is set */ | |
717 | static int __init omap_mux_late_init(void) | |
718 | { | |
112485e9 | 719 | struct omap_mux_partition *partition; |
15ac7afe | 720 | |
112485e9 BC |
721 | list_for_each_entry(partition, &mux_partitions, node) { |
722 | struct omap_mux_entry *e, *tmp; | |
723 | list_for_each_entry_safe(e, tmp, &partition->muxmodes, node) { | |
724 | struct omap_mux *m = &e->mux; | |
725 | u16 mode = omap_mux_read(partition, m->reg_offset); | |
15ac7afe | 726 | |
112485e9 BC |
727 | if (OMAP_MODE_GPIO(mode)) |
728 | continue; | |
15ac7afe TL |
729 | |
730 | #ifndef CONFIG_DEBUG_FS | |
112485e9 BC |
731 | mutex_lock(&muxmode_mutex); |
732 | list_del(&e->node); | |
733 | mutex_unlock(&muxmode_mutex); | |
734 | omap_mux_free_names(m); | |
735 | kfree(m); | |
1dbae815 | 736 | #endif |
112485e9 | 737 | } |
15ac7afe TL |
738 | } |
739 | ||
4b715efc TL |
740 | omap_mux_dbg_init(); |
741 | ||
15ac7afe TL |
742 | return 0; |
743 | } | |
744 | late_initcall(omap_mux_late_init); | |
745 | ||
746 | static void __init omap_mux_package_fixup(struct omap_mux *p, | |
747 | struct omap_mux *superset) | |
748 | { | |
749 | while (p->reg_offset != OMAP_MUX_TERMINATOR) { | |
750 | struct omap_mux *s = superset; | |
751 | int found = 0; | |
752 | ||
753 | while (s->reg_offset != OMAP_MUX_TERMINATOR) { | |
754 | if (s->reg_offset == p->reg_offset) { | |
755 | *s = *p; | |
756 | found++; | |
757 | break; | |
758 | } | |
759 | s++; | |
760 | } | |
761 | if (!found) | |
032a6424 | 762 | pr_err("%s: Unknown entry offset 0x%x\n", __func__, |
1cbb3a9a | 763 | p->reg_offset); |
15ac7afe TL |
764 | p++; |
765 | } | |
766 | } | |
767 | ||
768 | #ifdef CONFIG_DEBUG_FS | |
769 | ||
770 | static void __init omap_mux_package_init_balls(struct omap_ball *b, | |
771 | struct omap_mux *superset) | |
772 | { | |
773 | while (b->reg_offset != OMAP_MUX_TERMINATOR) { | |
774 | struct omap_mux *s = superset; | |
775 | int found = 0; | |
776 | ||
777 | while (s->reg_offset != OMAP_MUX_TERMINATOR) { | |
778 | if (s->reg_offset == b->reg_offset) { | |
779 | s->balls[0] = b->balls[0]; | |
780 | s->balls[1] = b->balls[1]; | |
781 | found++; | |
782 | break; | |
783 | } | |
784 | s++; | |
785 | } | |
786 | if (!found) | |
032a6424 | 787 | pr_err("%s: Unknown ball offset 0x%x\n", __func__, |
1cbb3a9a | 788 | b->reg_offset); |
15ac7afe TL |
789 | b++; |
790 | } | |
791 | } | |
792 | ||
793 | #else /* CONFIG_DEBUG_FS */ | |
794 | ||
795 | static inline void omap_mux_package_init_balls(struct omap_ball *b, | |
796 | struct omap_mux *superset) | |
797 | { | |
798 | } | |
799 | ||
800 | #endif /* CONFIG_DEBUG_FS */ | |
801 | ||
802 | static int __init omap_mux_setup(char *options) | |
803 | { | |
804 | if (!options) | |
805 | return 0; | |
806 | ||
807 | omap_mux_options = options; | |
808 | ||
809 | return 1; | |
810 | } | |
811 | __setup("omap_mux=", omap_mux_setup); | |
812 | ||
813 | /* | |
814 | * Note that the omap_mux=some.signal1=0x1234,some.signal2=0x1234 | |
815 | * cmdline options only override the bootloader values. | |
816 | * During development, please enable CONFIG_DEBUG_FS, and use the | |
817 | * signal specific entries under debugfs. | |
818 | */ | |
819 | static void __init omap_mux_set_cmdline_signals(void) | |
820 | { | |
821 | char *options, *next_opt, *token; | |
822 | ||
823 | if (!omap_mux_options) | |
824 | return; | |
825 | ||
826 | options = kmalloc(strlen(omap_mux_options) + 1, GFP_KERNEL); | |
827 | if (!options) | |
828 | return; | |
829 | ||
830 | strcpy(options, omap_mux_options); | |
831 | next_opt = options; | |
832 | ||
833 | while ((token = strsep(&next_opt, ",")) != NULL) { | |
834 | char *keyval, *name; | |
835 | unsigned long val; | |
836 | ||
837 | keyval = token; | |
838 | name = strsep(&keyval, "="); | |
839 | if (name) { | |
840 | int res; | |
841 | ||
842 | res = strict_strtoul(keyval, 0x10, &val); | |
843 | if (res < 0) | |
844 | continue; | |
845 | ||
846 | omap_mux_init_signal(name, (u16)val); | |
847 | } | |
848 | } | |
849 | ||
850 | kfree(options); | |
851 | } | |
852 | ||
15ac7afe | 853 | static int __init omap_mux_copy_names(struct omap_mux *src, |
112485e9 | 854 | struct omap_mux *dst) |
15ac7afe TL |
855 | { |
856 | int i; | |
857 | ||
858 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) { | |
859 | if (src->muxnames[i]) { | |
860 | dst->muxnames[i] = | |
861 | kmalloc(strlen(src->muxnames[i]) + 1, | |
862 | GFP_KERNEL); | |
863 | if (!dst->muxnames[i]) | |
864 | goto free; | |
865 | strcpy(dst->muxnames[i], src->muxnames[i]); | |
866 | } | |
867 | } | |
868 | ||
869 | #ifdef CONFIG_DEBUG_FS | |
870 | for (i = 0; i < OMAP_MUX_NR_SIDES; i++) { | |
871 | if (src->balls[i]) { | |
872 | dst->balls[i] = | |
873 | kmalloc(strlen(src->balls[i]) + 1, | |
874 | GFP_KERNEL); | |
875 | if (!dst->balls[i]) | |
876 | goto free; | |
877 | strcpy(dst->balls[i], src->balls[i]); | |
878 | } | |
879 | } | |
880 | #endif | |
881 | ||
882 | return 0; | |
883 | ||
884 | free: | |
885 | omap_mux_free_names(dst); | |
886 | return -ENOMEM; | |
887 | ||
888 | } | |
889 | ||
890 | #endif /* CONFIG_OMAP_MUX */ | |
891 | ||
112485e9 BC |
892 | static struct omap_mux *omap_mux_get_by_gpio( |
893 | struct omap_mux_partition *partition, | |
894 | int gpio) | |
15ac7afe TL |
895 | { |
896 | struct omap_mux_entry *e; | |
112485e9 | 897 | struct omap_mux *ret = NULL; |
15ac7afe | 898 | |
112485e9 | 899 | list_for_each_entry(e, &partition->muxmodes, node) { |
15ac7afe TL |
900 | struct omap_mux *m = &e->mux; |
901 | if (m->gpio == gpio) { | |
112485e9 | 902 | ret = m; |
15ac7afe TL |
903 | break; |
904 | } | |
905 | } | |
906 | ||
112485e9 | 907 | return ret; |
15ac7afe TL |
908 | } |
909 | ||
910 | /* Needed for dynamic muxing of GPIO pins for off-idle */ | |
911 | u16 omap_mux_get_gpio(int gpio) | |
912 | { | |
112485e9 BC |
913 | struct omap_mux_partition *partition; |
914 | struct omap_mux *m; | |
15ac7afe | 915 | |
112485e9 BC |
916 | list_for_each_entry(partition, &mux_partitions, node) { |
917 | m = omap_mux_get_by_gpio(partition, gpio); | |
918 | if (m) | |
919 | return omap_mux_read(partition, m->reg_offset); | |
15ac7afe TL |
920 | } |
921 | ||
112485e9 | 922 | if (!m || m->reg_offset == OMAP_MUX_TERMINATOR) |
032a6424 | 923 | pr_err("%s: Could not get gpio%i\n", __func__, gpio); |
112485e9 BC |
924 | |
925 | return OMAP_MUX_TERMINATOR; | |
15ac7afe TL |
926 | } |
927 | ||
928 | /* Needed for dynamic muxing of GPIO pins for off-idle */ | |
929 | void omap_mux_set_gpio(u16 val, int gpio) | |
930 | { | |
112485e9 BC |
931 | struct omap_mux_partition *partition; |
932 | struct omap_mux *m = NULL; | |
15ac7afe | 933 | |
112485e9 BC |
934 | list_for_each_entry(partition, &mux_partitions, node) { |
935 | m = omap_mux_get_by_gpio(partition, gpio); | |
936 | if (m) { | |
937 | omap_mux_write(partition, val, m->reg_offset); | |
938 | return; | |
939 | } | |
15ac7afe TL |
940 | } |
941 | ||
112485e9 | 942 | if (!m || m->reg_offset == OMAP_MUX_TERMINATOR) |
032a6424 | 943 | pr_err("%s: Could not set gpio%i\n", __func__, gpio); |
15ac7afe TL |
944 | } |
945 | ||
112485e9 BC |
946 | static struct omap_mux * __init omap_mux_list_add( |
947 | struct omap_mux_partition *partition, | |
948 | struct omap_mux *src) | |
15ac7afe TL |
949 | { |
950 | struct omap_mux_entry *entry; | |
951 | struct omap_mux *m; | |
952 | ||
953 | entry = kzalloc(sizeof(struct omap_mux_entry), GFP_KERNEL); | |
954 | if (!entry) | |
955 | return NULL; | |
956 | ||
957 | m = &entry->mux; | |
30833142 | 958 | entry->mux = *src; |
15ac7afe TL |
959 | |
960 | #ifdef CONFIG_OMAP_MUX | |
961 | if (omap_mux_copy_names(src, m)) { | |
962 | kfree(entry); | |
963 | return NULL; | |
964 | } | |
965 | #endif | |
966 | ||
967 | mutex_lock(&muxmode_mutex); | |
112485e9 | 968 | list_add_tail(&entry->node, &partition->muxmodes); |
15ac7afe TL |
969 | mutex_unlock(&muxmode_mutex); |
970 | ||
971 | return m; | |
972 | } | |
973 | ||
974 | /* | |
975 | * Note if CONFIG_OMAP_MUX is not selected, we will only initialize | |
976 | * the GPIO to mux offset mapping that is needed for dynamic muxing | |
977 | * of GPIO pins for off-idle. | |
978 | */ | |
112485e9 BC |
979 | static void __init omap_mux_init_list(struct omap_mux_partition *partition, |
980 | struct omap_mux *superset) | |
15ac7afe TL |
981 | { |
982 | while (superset->reg_offset != OMAP_MUX_TERMINATOR) { | |
983 | struct omap_mux *entry; | |
984 | ||
b72c7d54 RL |
985 | #ifdef CONFIG_OMAP_MUX |
986 | if (!superset->muxnames || !superset->muxnames[0]) { | |
15ac7afe TL |
987 | superset++; |
988 | continue; | |
989 | } | |
b72c7d54 RL |
990 | #else |
991 | /* Skip pins that are not muxed as GPIO by bootloader */ | |
112485e9 BC |
992 | if (!OMAP_MODE_GPIO(omap_mux_read(partition, |
993 | superset->reg_offset))) { | |
9ecef433 TL |
994 | superset++; |
995 | continue; | |
996 | } | |
997 | #endif | |
998 | ||
112485e9 | 999 | entry = omap_mux_list_add(partition, superset); |
15ac7afe | 1000 | if (!entry) { |
032a6424 | 1001 | pr_err("%s: Could not add entry\n", __func__); |
15ac7afe TL |
1002 | return; |
1003 | } | |
1004 | superset++; | |
1005 | } | |
1006 | } | |
1007 | ||
321cfc85 TL |
1008 | #ifdef CONFIG_OMAP_MUX |
1009 | ||
1010 | static void omap_mux_init_package(struct omap_mux *superset, | |
1011 | struct omap_mux *package_subset, | |
1012 | struct omap_ball *package_balls) | |
1013 | { | |
1014 | if (package_subset) | |
1015 | omap_mux_package_fixup(package_subset, superset); | |
1016 | if (package_balls) | |
1017 | omap_mux_package_init_balls(package_balls, superset); | |
1018 | } | |
1019 | ||
112485e9 BC |
1020 | static void omap_mux_init_signals(struct omap_mux_partition *partition, |
1021 | struct omap_board_mux *board_mux) | |
321cfc85 TL |
1022 | { |
1023 | omap_mux_set_cmdline_signals(); | |
112485e9 | 1024 | omap_mux_write_array(partition, board_mux); |
321cfc85 TL |
1025 | } |
1026 | ||
1027 | #else | |
1028 | ||
1029 | static void omap_mux_init_package(struct omap_mux *superset, | |
1030 | struct omap_mux *package_subset, | |
1031 | struct omap_ball *package_balls) | |
1032 | { | |
1033 | } | |
1034 | ||
112485e9 BC |
1035 | static void omap_mux_init_signals(struct omap_mux_partition *partition, |
1036 | struct omap_board_mux *board_mux) | |
321cfc85 TL |
1037 | { |
1038 | } | |
1039 | ||
1040 | #endif | |
1041 | ||
112485e9 | 1042 | static u32 mux_partitions_cnt; |
15ac7afe | 1043 | |
112485e9 BC |
1044 | int __init omap_mux_init(const char *name, u32 flags, |
1045 | u32 mux_pbase, u32 mux_size, | |
1046 | struct omap_mux *superset, | |
1047 | struct omap_mux *package_subset, | |
1048 | struct omap_board_mux *board_mux, | |
1049 | struct omap_ball *package_balls) | |
1050 | { | |
1051 | struct omap_mux_partition *partition; | |
1052 | ||
1053 | partition = kzalloc(sizeof(struct omap_mux_partition), GFP_KERNEL); | |
1054 | if (!partition) | |
1055 | return -ENOMEM; | |
1056 | ||
1057 | partition->name = name; | |
1058 | partition->flags = flags; | |
1059 | partition->size = mux_size; | |
1060 | partition->phys = mux_pbase; | |
1061 | partition->base = ioremap(mux_pbase, mux_size); | |
1062 | if (!partition->base) { | |
032a6424 DM |
1063 | pr_err("%s: Could not ioremap mux partition at 0x%08x\n", |
1064 | __func__, partition->phys); | |
9d47e309 | 1065 | kfree(partition); |
15ac7afe TL |
1066 | return -ENODEV; |
1067 | } | |
1068 | ||
112485e9 BC |
1069 | INIT_LIST_HEAD(&partition->muxmodes); |
1070 | ||
1071 | list_add_tail(&partition->node, &mux_partitions); | |
1072 | mux_partitions_cnt++; | |
032a6424 | 1073 | pr_info("%s: Add partition: #%d: %s, flags: %x\n", __func__, |
112485e9 | 1074 | mux_partitions_cnt, partition->name, partition->flags); |
d5425be6 | 1075 | |
321cfc85 | 1076 | omap_mux_init_package(superset, package_subset, package_balls); |
112485e9 BC |
1077 | omap_mux_init_list(partition, superset); |
1078 | omap_mux_init_signals(partition, board_mux); | |
2cb0c54f | 1079 | |
15ac7afe TL |
1080 | return 0; |
1081 | } | |
1082 |