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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 | { |
d4ff6121 CC |
86 | if (!board_mux) |
87 | return; | |
88 | ||
112485e9 BC |
89 | while (board_mux->reg_offset != OMAP_MUX_TERMINATOR) { |
90 | omap_mux_write(partition, board_mux->value, | |
91 | board_mux->reg_offset); | |
d4bb72e5 TL |
92 | board_mux++; |
93 | } | |
94 | } | |
95 | ||
15ac7afe TL |
96 | #ifdef CONFIG_OMAP_MUX |
97 | ||
98 | static char *omap_mux_options; | |
99 | ||
112485e9 BC |
100 | static int __init _omap_mux_init_gpio(struct omap_mux_partition *partition, |
101 | int gpio, int val) | |
15ac7afe TL |
102 | { |
103 | struct omap_mux_entry *e; | |
ca828760 | 104 | struct omap_mux *gpio_mux = NULL; |
8a6f7e14 GI |
105 | u16 old_mode; |
106 | u16 mux_mode; | |
15ac7afe | 107 | int found = 0; |
112485e9 | 108 | struct list_head *muxmodes = &partition->muxmodes; |
15ac7afe TL |
109 | |
110 | if (!gpio) | |
111 | return -EINVAL; | |
112 | ||
112485e9 | 113 | list_for_each_entry(e, muxmodes, node) { |
15ac7afe TL |
114 | struct omap_mux *m = &e->mux; |
115 | if (gpio == m->gpio) { | |
8a6f7e14 | 116 | gpio_mux = m; |
15ac7afe TL |
117 | found++; |
118 | } | |
119 | } | |
120 | ||
8a6f7e14 | 121 | if (found == 0) { |
032a6424 | 122 | pr_err("%s: Could not set gpio%i\n", __func__, gpio); |
8a6f7e14 GI |
123 | return -ENODEV; |
124 | } | |
15ac7afe TL |
125 | |
126 | if (found > 1) { | |
032a6424 | 127 | pr_info("%s: Multiple gpio paths (%d) for gpio%i\n", __func__, |
1cbb3a9a | 128 | found, gpio); |
15ac7afe TL |
129 | return -EINVAL; |
130 | } | |
131 | ||
112485e9 | 132 | old_mode = omap_mux_read(partition, gpio_mux->reg_offset); |
8a6f7e14 | 133 | mux_mode = val & ~(OMAP_MUX_NR_MODES - 1); |
112485e9 | 134 | if (partition->flags & OMAP_MUX_GPIO_IN_MODE3) |
8a6f7e14 GI |
135 | mux_mode |= OMAP_MUX_MODE3; |
136 | else | |
137 | mux_mode |= OMAP_MUX_MODE4; | |
032a6424 | 138 | pr_debug("%s: Setting signal %s.gpio%i 0x%04x -> 0x%04x\n", __func__, |
1cbb3a9a | 139 | gpio_mux->muxnames[0], gpio, old_mode, mux_mode); |
112485e9 | 140 | omap_mux_write(partition, mux_mode, gpio_mux->reg_offset); |
15ac7afe | 141 | |
8a6f7e14 | 142 | return 0; |
15ac7afe TL |
143 | } |
144 | ||
112485e9 BC |
145 | int __init omap_mux_init_gpio(int gpio, int val) |
146 | { | |
147 | struct omap_mux_partition *partition; | |
148 | int ret; | |
149 | ||
150 | list_for_each_entry(partition, &mux_partitions, node) { | |
151 | ret = _omap_mux_init_gpio(partition, gpio, val); | |
152 | if (!ret) | |
153 | return ret; | |
154 | } | |
155 | ||
156 | return -ENODEV; | |
157 | } | |
158 | ||
8419fdba TL |
159 | static int __init _omap_mux_get_by_name(struct omap_mux_partition *partition, |
160 | const char *muxname, | |
161 | struct omap_mux **found_mux) | |
15ac7afe | 162 | { |
8419fdba | 163 | struct omap_mux *mux = NULL; |
15ac7afe | 164 | struct omap_mux_entry *e; |
5a3b2f7a | 165 | const char *mode_name; |
afb7d709 | 166 | int found = 0, found_mode = 0, mode0_len = 0; |
112485e9 | 167 | struct list_head *muxmodes = &partition->muxmodes; |
15ac7afe TL |
168 | |
169 | mode_name = strchr(muxname, '.'); | |
170 | if (mode_name) { | |
5a3b2f7a | 171 | mode0_len = strlen(muxname) - strlen(mode_name); |
15ac7afe | 172 | mode_name++; |
15ac7afe TL |
173 | } else { |
174 | mode_name = muxname; | |
175 | } | |
176 | ||
112485e9 | 177 | list_for_each_entry(e, muxmodes, node) { |
8419fdba | 178 | char *m0_entry; |
15ac7afe TL |
179 | int i; |
180 | ||
8419fdba TL |
181 | mux = &e->mux; |
182 | m0_entry = mux->muxnames[0]; | |
183 | ||
5a3b2f7a TL |
184 | /* First check for full name in mode0.muxmode format */ |
185 | if (mode0_len && strncmp(muxname, m0_entry, mode0_len)) | |
15ac7afe TL |
186 | continue; |
187 | ||
5a3b2f7a | 188 | /* Then check for muxmode only */ |
15ac7afe | 189 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) { |
8419fdba | 190 | char *mode_cur = mux->muxnames[i]; |
15ac7afe TL |
191 | |
192 | if (!mode_cur) | |
193 | continue; | |
194 | ||
195 | if (!strcmp(mode_name, mode_cur)) { | |
8419fdba | 196 | *found_mux = mux; |
15ac7afe | 197 | found++; |
8419fdba | 198 | found_mode = i; |
15ac7afe TL |
199 | } |
200 | } | |
201 | } | |
202 | ||
8419fdba TL |
203 | if (found == 1) { |
204 | return found_mode; | |
205 | } | |
15ac7afe TL |
206 | |
207 | if (found > 1) { | |
032a6424 | 208 | pr_err("%s: Multiple signal paths (%i) for %s\n", __func__, |
1cbb3a9a | 209 | found, muxname); |
15ac7afe TL |
210 | return -EINVAL; |
211 | } | |
212 | ||
8419fdba | 213 | pr_err("%s: Could not find signal %s\n", __func__, muxname); |
15ac7afe TL |
214 | |
215 | return -ENODEV; | |
216 | } | |
217 | ||
8419fdba TL |
218 | static int __init |
219 | omap_mux_get_by_name(const char *muxname, | |
220 | struct omap_mux_partition **found_partition, | |
221 | struct omap_mux **found_mux) | |
112485e9 BC |
222 | { |
223 | struct omap_mux_partition *partition; | |
112485e9 BC |
224 | |
225 | list_for_each_entry(partition, &mux_partitions, node) { | |
8419fdba TL |
226 | struct omap_mux *mux = NULL; |
227 | int mux_mode = _omap_mux_get_by_name(partition, muxname, &mux); | |
228 | if (mux_mode < 0) | |
229 | continue; | |
230 | ||
231 | *found_partition = partition; | |
232 | *found_mux = mux; | |
233 | ||
234 | return mux_mode; | |
112485e9 BC |
235 | } |
236 | ||
237 | return -ENODEV; | |
8419fdba | 238 | } |
112485e9 | 239 | |
8419fdba TL |
240 | int __init omap_mux_init_signal(const char *muxname, int val) |
241 | { | |
242 | struct omap_mux_partition *partition = NULL; | |
243 | struct omap_mux *mux = NULL; | |
244 | u16 old_mode; | |
245 | int mux_mode; | |
246 | ||
247 | mux_mode = omap_mux_get_by_name(muxname, &partition, &mux); | |
248 | if (mux_mode < 0) | |
249 | return mux_mode; | |
250 | ||
251 | old_mode = omap_mux_read(partition, mux->reg_offset); | |
252 | mux_mode |= val; | |
253 | pr_debug("%s: Setting signal %s 0x%04x -> 0x%04x\n", | |
254 | __func__, muxname, old_mode, mux_mode); | |
255 | omap_mux_write(partition, mux_mode, mux->reg_offset); | |
256 | ||
257 | return 0; | |
112485e9 BC |
258 | } |
259 | ||
9796b323 TL |
260 | struct omap_hwmod_mux_info * __init |
261 | omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads) | |
262 | { | |
263 | struct omap_hwmod_mux_info *hmux; | |
029268e4 | 264 | int i, nr_pads_dynamic = 0; |
9796b323 TL |
265 | |
266 | if (!bpads || nr_pads < 1) | |
267 | return NULL; | |
268 | ||
269 | hmux = kzalloc(sizeof(struct omap_hwmod_mux_info), GFP_KERNEL); | |
270 | if (!hmux) | |
271 | goto err1; | |
272 | ||
273 | hmux->nr_pads = nr_pads; | |
274 | ||
275 | hmux->pads = kzalloc(sizeof(struct omap_device_pad) * | |
276 | nr_pads, GFP_KERNEL); | |
277 | if (!hmux->pads) | |
278 | goto err2; | |
279 | ||
280 | for (i = 0; i < hmux->nr_pads; i++) { | |
281 | struct omap_mux_partition *partition; | |
282 | struct omap_device_pad *bpad = &bpads[i], *pad = &hmux->pads[i]; | |
283 | struct omap_mux *mux; | |
284 | int mux_mode; | |
285 | ||
286 | mux_mode = omap_mux_get_by_name(bpad->name, &partition, &mux); | |
287 | if (mux_mode < 0) | |
288 | goto err3; | |
289 | if (!pad->partition) | |
290 | pad->partition = partition; | |
291 | if (!pad->mux) | |
292 | pad->mux = mux; | |
293 | ||
294 | pad->name = kzalloc(strlen(bpad->name) + 1, GFP_KERNEL); | |
295 | if (!pad->name) { | |
296 | int j; | |
297 | ||
298 | for (j = i - 1; j >= 0; j--) | |
299 | kfree(hmux->pads[j].name); | |
300 | goto err3; | |
301 | } | |
302 | strcpy(pad->name, bpad->name); | |
303 | ||
304 | pad->flags = bpad->flags; | |
305 | pad->enable = bpad->enable; | |
306 | pad->idle = bpad->idle; | |
307 | pad->off = bpad->off; | |
029268e4 TL |
308 | |
309 | if (pad->flags & OMAP_DEVICE_PAD_REMUX) | |
310 | nr_pads_dynamic++; | |
311 | ||
9796b323 TL |
312 | pr_debug("%s: Initialized %s\n", __func__, pad->name); |
313 | } | |
314 | ||
029268e4 TL |
315 | if (!nr_pads_dynamic) |
316 | return hmux; | |
317 | ||
318 | /* | |
319 | * Add pads that need dynamic muxing into a separate list | |
320 | */ | |
321 | ||
322 | hmux->nr_pads_dynamic = nr_pads_dynamic; | |
323 | hmux->pads_dynamic = kzalloc(sizeof(struct omap_device_pad *) * | |
324 | nr_pads_dynamic, GFP_KERNEL); | |
325 | if (!hmux->pads_dynamic) { | |
326 | pr_err("%s: Could not allocate dynamic pads\n", __func__); | |
327 | return hmux; | |
328 | } | |
329 | ||
330 | nr_pads_dynamic = 0; | |
331 | for (i = 0; i < hmux->nr_pads; i++) { | |
332 | struct omap_device_pad *pad = &hmux->pads[i]; | |
333 | ||
334 | if (pad->flags & OMAP_DEVICE_PAD_REMUX) { | |
335 | pr_debug("%s: pad %s tagged dynamic\n", | |
336 | __func__, pad->name); | |
337 | hmux->pads_dynamic[nr_pads_dynamic] = pad; | |
338 | nr_pads_dynamic++; | |
339 | } | |
340 | } | |
341 | ||
9796b323 TL |
342 | return hmux; |
343 | ||
344 | err3: | |
345 | kfree(hmux->pads); | |
346 | err2: | |
347 | kfree(hmux); | |
348 | err1: | |
349 | pr_err("%s: Could not allocate device mux entry\n", __func__); | |
350 | ||
351 | return NULL; | |
352 | } | |
353 | ||
8d9af88f TL |
354 | /* Assumes the calling function takes care of locking */ |
355 | void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state) | |
356 | { | |
357 | int i; | |
358 | ||
029268e4 TL |
359 | /* Runtime idling of dynamic pads */ |
360 | if (state == _HWMOD_STATE_IDLE && hmux->enabled) { | |
361 | for (i = 0; i < hmux->nr_pads_dynamic; i++) { | |
362 | struct omap_device_pad *pad = hmux->pads_dynamic[i]; | |
363 | int val = -EINVAL; | |
364 | ||
029268e4 TL |
365 | val = pad->idle; |
366 | omap_mux_write(pad->partition, val, | |
367 | pad->mux->reg_offset); | |
368 | } | |
369 | ||
370 | return; | |
371 | } | |
372 | ||
373 | /* Runtime enabling of dynamic pads */ | |
86c79bf4 S |
374 | if ((state == _HWMOD_STATE_ENABLED) && hmux->pads_dynamic |
375 | && hmux->enabled) { | |
029268e4 TL |
376 | for (i = 0; i < hmux->nr_pads_dynamic; i++) { |
377 | struct omap_device_pad *pad = hmux->pads_dynamic[i]; | |
378 | int val = -EINVAL; | |
379 | ||
029268e4 TL |
380 | val = pad->enable; |
381 | omap_mux_write(pad->partition, val, | |
382 | pad->mux->reg_offset); | |
029268e4 TL |
383 | } |
384 | ||
86c79bf4 | 385 | return; |
029268e4 TL |
386 | } |
387 | ||
388 | /* Enabling or disabling of all pads */ | |
8d9af88f TL |
389 | for (i = 0; i < hmux->nr_pads; i++) { |
390 | struct omap_device_pad *pad = &hmux->pads[i]; | |
391 | int flags, val = -EINVAL; | |
392 | ||
393 | flags = pad->flags; | |
394 | ||
395 | switch (state) { | |
396 | case _HWMOD_STATE_ENABLED: | |
8d9af88f TL |
397 | val = pad->enable; |
398 | pr_debug("%s: Enabling %s %x\n", __func__, | |
399 | pad->name, val); | |
400 | break; | |
8d9af88f | 401 | case _HWMOD_STATE_DISABLED: |
8d9af88f TL |
402 | /* Use safe mode unless OMAP_DEVICE_PAD_REMUX */ |
403 | if (flags & OMAP_DEVICE_PAD_REMUX) | |
404 | val = pad->off; | |
405 | else | |
406 | val = OMAP_MUX_MODE7; | |
8d9af88f TL |
407 | pr_debug("%s: Disabling %s %x\n", __func__, |
408 | pad->name, val); | |
86c79bf4 S |
409 | break; |
410 | default: | |
411 | /* Nothing to be done */ | |
412 | break; | |
8d9af88f TL |
413 | }; |
414 | ||
415 | if (val >= 0) { | |
416 | omap_mux_write(pad->partition, val, | |
417 | pad->mux->reg_offset); | |
418 | pad->flags = flags; | |
419 | } | |
420 | } | |
029268e4 TL |
421 | |
422 | if (state == _HWMOD_STATE_ENABLED) | |
423 | hmux->enabled = true; | |
424 | else | |
425 | hmux->enabled = false; | |
8d9af88f TL |
426 | } |
427 | ||
4b715efc TL |
428 | #ifdef CONFIG_DEBUG_FS |
429 | ||
430 | #define OMAP_MUX_MAX_NR_FLAGS 10 | |
431 | #define OMAP_MUX_TEST_FLAG(val, mask) \ | |
432 | if (((val) & (mask)) == (mask)) { \ | |
433 | i++; \ | |
434 | flags[i] = #mask; \ | |
435 | } | |
436 | ||
437 | /* REVISIT: Add checking for non-optimal mux settings */ | |
438 | static inline void omap_mux_decode(struct seq_file *s, u16 val) | |
439 | { | |
440 | char *flags[OMAP_MUX_MAX_NR_FLAGS]; | |
78737ae1 | 441 | char mode[sizeof("OMAP_MUX_MODE") + 1]; |
4b715efc TL |
442 | int i = -1; |
443 | ||
444 | sprintf(mode, "OMAP_MUX_MODE%d", val & 0x7); | |
445 | i++; | |
446 | flags[i] = mode; | |
447 | ||
448 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_OFF_WAKEUPENABLE); | |
449 | if (val & OMAP_OFF_EN) { | |
450 | if (!(val & OMAP_OFFOUT_EN)) { | |
451 | if (!(val & OMAP_OFF_PULL_UP)) { | |
452 | OMAP_MUX_TEST_FLAG(val, | |
453 | OMAP_PIN_OFF_INPUT_PULLDOWN); | |
454 | } else { | |
455 | OMAP_MUX_TEST_FLAG(val, | |
456 | OMAP_PIN_OFF_INPUT_PULLUP); | |
457 | } | |
458 | } else { | |
459 | if (!(val & OMAP_OFFOUT_VAL)) { | |
460 | OMAP_MUX_TEST_FLAG(val, | |
461 | OMAP_PIN_OFF_OUTPUT_LOW); | |
462 | } else { | |
463 | OMAP_MUX_TEST_FLAG(val, | |
464 | OMAP_PIN_OFF_OUTPUT_HIGH); | |
465 | } | |
466 | } | |
467 | } | |
468 | ||
469 | if (val & OMAP_INPUT_EN) { | |
470 | if (val & OMAP_PULL_ENA) { | |
471 | if (!(val & OMAP_PULL_UP)) { | |
472 | OMAP_MUX_TEST_FLAG(val, | |
473 | OMAP_PIN_INPUT_PULLDOWN); | |
474 | } else { | |
475 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT_PULLUP); | |
476 | } | |
477 | } else { | |
478 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT); | |
479 | } | |
480 | } else { | |
481 | i++; | |
482 | flags[i] = "OMAP_PIN_OUTPUT"; | |
483 | } | |
484 | ||
485 | do { | |
486 | seq_printf(s, "%s", flags[i]); | |
487 | if (i > 0) | |
488 | seq_printf(s, " | "); | |
489 | } while (i-- > 0); | |
490 | } | |
491 | ||
112485e9 | 492 | #define OMAP_MUX_DEFNAME_LEN 32 |
4b715efc TL |
493 | |
494 | static int omap_mux_dbg_board_show(struct seq_file *s, void *unused) | |
495 | { | |
112485e9 | 496 | struct omap_mux_partition *partition = s->private; |
4b715efc | 497 | struct omap_mux_entry *e; |
112485e9 | 498 | u8 omap_gen = omap_rev() >> 28; |
4b715efc | 499 | |
112485e9 | 500 | list_for_each_entry(e, &partition->muxmodes, node) { |
4b715efc TL |
501 | struct omap_mux *m = &e->mux; |
502 | char m0_def[OMAP_MUX_DEFNAME_LEN]; | |
503 | char *m0_name = m->muxnames[0]; | |
504 | u16 val; | |
505 | int i, mode; | |
506 | ||
507 | if (!m0_name) | |
508 | continue; | |
509 | ||
78737ae1 | 510 | /* REVISIT: Needs to be updated if mode0 names get longer */ |
4b715efc TL |
511 | for (i = 0; i < OMAP_MUX_DEFNAME_LEN; i++) { |
512 | if (m0_name[i] == '\0') { | |
513 | m0_def[i] = m0_name[i]; | |
514 | break; | |
515 | } | |
516 | m0_def[i] = toupper(m0_name[i]); | |
517 | } | |
112485e9 | 518 | val = omap_mux_read(partition, m->reg_offset); |
4b715efc | 519 | mode = val & OMAP_MUX_MODE7; |
112485e9 BC |
520 | if (mode != 0) |
521 | seq_printf(s, "/* %s */\n", m->muxnames[mode]); | |
522 | ||
523 | /* | |
25985edc | 524 | * XXX: Might be revisited to support differences across |
112485e9 BC |
525 | * same OMAP generation. |
526 | */ | |
527 | seq_printf(s, "OMAP%d_MUX(%s, ", omap_gen, m0_def); | |
4b715efc TL |
528 | omap_mux_decode(s, val); |
529 | seq_printf(s, "),\n"); | |
530 | } | |
531 | ||
532 | return 0; | |
533 | } | |
534 | ||
535 | static int omap_mux_dbg_board_open(struct inode *inode, struct file *file) | |
536 | { | |
112485e9 | 537 | return single_open(file, omap_mux_dbg_board_show, inode->i_private); |
4b715efc TL |
538 | } |
539 | ||
540 | static const struct file_operations omap_mux_dbg_board_fops = { | |
541 | .open = omap_mux_dbg_board_open, | |
542 | .read = seq_read, | |
543 | .llseek = seq_lseek, | |
544 | .release = single_release, | |
545 | }; | |
546 | ||
112485e9 BC |
547 | static struct omap_mux_partition *omap_mux_get_partition(struct omap_mux *mux) |
548 | { | |
549 | struct omap_mux_partition *partition; | |
550 | ||
551 | list_for_each_entry(partition, &mux_partitions, node) { | |
552 | struct list_head *muxmodes = &partition->muxmodes; | |
553 | struct omap_mux_entry *e; | |
554 | ||
555 | list_for_each_entry(e, muxmodes, node) { | |
556 | struct omap_mux *m = &e->mux; | |
557 | ||
558 | if (m == mux) | |
559 | return partition; | |
560 | } | |
561 | } | |
562 | ||
563 | return NULL; | |
564 | } | |
565 | ||
4b715efc TL |
566 | static int omap_mux_dbg_signal_show(struct seq_file *s, void *unused) |
567 | { | |
568 | struct omap_mux *m = s->private; | |
112485e9 | 569 | struct omap_mux_partition *partition; |
4b715efc TL |
570 | const char *none = "NA"; |
571 | u16 val; | |
572 | int mode; | |
573 | ||
112485e9 BC |
574 | partition = omap_mux_get_partition(m); |
575 | if (!partition) | |
576 | return 0; | |
577 | ||
578 | val = omap_mux_read(partition, m->reg_offset); | |
4b715efc TL |
579 | mode = val & OMAP_MUX_MODE7; |
580 | ||
112485e9 | 581 | seq_printf(s, "name: %s.%s (0x%08x/0x%03x = 0x%04x), b %s, t %s\n", |
4b715efc | 582 | m->muxnames[0], m->muxnames[mode], |
112485e9 | 583 | partition->phys + m->reg_offset, m->reg_offset, val, |
4b715efc TL |
584 | m->balls[0] ? m->balls[0] : none, |
585 | m->balls[1] ? m->balls[1] : none); | |
586 | seq_printf(s, "mode: "); | |
587 | omap_mux_decode(s, val); | |
588 | seq_printf(s, "\n"); | |
589 | seq_printf(s, "signals: %s | %s | %s | %s | %s | %s | %s | %s\n", | |
590 | m->muxnames[0] ? m->muxnames[0] : none, | |
591 | m->muxnames[1] ? m->muxnames[1] : none, | |
592 | m->muxnames[2] ? m->muxnames[2] : none, | |
593 | m->muxnames[3] ? m->muxnames[3] : none, | |
594 | m->muxnames[4] ? m->muxnames[4] : none, | |
595 | m->muxnames[5] ? m->muxnames[5] : none, | |
596 | m->muxnames[6] ? m->muxnames[6] : none, | |
597 | m->muxnames[7] ? m->muxnames[7] : none); | |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
602 | #define OMAP_MUX_MAX_ARG_CHAR 7 | |
603 | ||
604 | static ssize_t omap_mux_dbg_signal_write(struct file *file, | |
112485e9 BC |
605 | const char __user *user_buf, |
606 | size_t count, loff_t *ppos) | |
4b715efc TL |
607 | { |
608 | char buf[OMAP_MUX_MAX_ARG_CHAR]; | |
609 | struct seq_file *seqf; | |
610 | struct omap_mux *m; | |
611 | unsigned long val; | |
612 | int buf_size, ret; | |
112485e9 | 613 | struct omap_mux_partition *partition; |
4b715efc TL |
614 | |
615 | if (count > OMAP_MUX_MAX_ARG_CHAR) | |
616 | return -EINVAL; | |
617 | ||
618 | memset(buf, 0, sizeof(buf)); | |
619 | buf_size = min(count, sizeof(buf) - 1); | |
620 | ||
621 | if (copy_from_user(buf, user_buf, buf_size)) | |
622 | return -EFAULT; | |
623 | ||
624 | ret = strict_strtoul(buf, 0x10, &val); | |
625 | if (ret < 0) | |
626 | return ret; | |
627 | ||
628 | if (val > 0xffff) | |
629 | return -EINVAL; | |
630 | ||
631 | seqf = file->private_data; | |
632 | m = seqf->private; | |
633 | ||
112485e9 BC |
634 | partition = omap_mux_get_partition(m); |
635 | if (!partition) | |
636 | return -ENODEV; | |
637 | ||
638 | omap_mux_write(partition, (u16)val, m->reg_offset); | |
4b715efc TL |
639 | *ppos += count; |
640 | ||
641 | return count; | |
642 | } | |
643 | ||
644 | static int omap_mux_dbg_signal_open(struct inode *inode, struct file *file) | |
645 | { | |
646 | return single_open(file, omap_mux_dbg_signal_show, inode->i_private); | |
647 | } | |
648 | ||
649 | static const struct file_operations omap_mux_dbg_signal_fops = { | |
650 | .open = omap_mux_dbg_signal_open, | |
651 | .read = seq_read, | |
652 | .write = omap_mux_dbg_signal_write, | |
653 | .llseek = seq_lseek, | |
654 | .release = single_release, | |
655 | }; | |
656 | ||
657 | static struct dentry *mux_dbg_dir; | |
658 | ||
112485e9 BC |
659 | static void __init omap_mux_dbg_create_entry( |
660 | struct omap_mux_partition *partition, | |
661 | struct dentry *mux_dbg_dir) | |
4b715efc TL |
662 | { |
663 | struct omap_mux_entry *e; | |
664 | ||
112485e9 BC |
665 | list_for_each_entry(e, &partition->muxmodes, node) { |
666 | struct omap_mux *m = &e->mux; | |
667 | ||
9b12771a | 668 | (void)debugfs_create_file(m->muxnames[0], S_IWUSR, mux_dbg_dir, |
112485e9 BC |
669 | m, &omap_mux_dbg_signal_fops); |
670 | } | |
671 | } | |
672 | ||
673 | static void __init omap_mux_dbg_init(void) | |
674 | { | |
675 | struct omap_mux_partition *partition; | |
676 | static struct dentry *mux_dbg_board_dir; | |
677 | ||
4b715efc TL |
678 | mux_dbg_dir = debugfs_create_dir("omap_mux", NULL); |
679 | if (!mux_dbg_dir) | |
680 | return; | |
681 | ||
112485e9 BC |
682 | mux_dbg_board_dir = debugfs_create_dir("board", mux_dbg_dir); |
683 | if (!mux_dbg_board_dir) | |
684 | return; | |
4b715efc | 685 | |
112485e9 BC |
686 | list_for_each_entry(partition, &mux_partitions, node) { |
687 | omap_mux_dbg_create_entry(partition, mux_dbg_dir); | |
688 | (void)debugfs_create_file(partition->name, S_IRUGO, | |
689 | mux_dbg_board_dir, partition, | |
690 | &omap_mux_dbg_board_fops); | |
4b715efc TL |
691 | } |
692 | } | |
693 | ||
694 | #else | |
695 | static inline void omap_mux_dbg_init(void) | |
696 | { | |
697 | } | |
698 | #endif /* CONFIG_DEBUG_FS */ | |
699 | ||
15ac7afe TL |
700 | static void __init omap_mux_free_names(struct omap_mux *m) |
701 | { | |
702 | int i; | |
703 | ||
704 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) | |
705 | kfree(m->muxnames[i]); | |
706 | ||
707 | #ifdef CONFIG_DEBUG_FS | |
708 | for (i = 0; i < OMAP_MUX_NR_SIDES; i++) | |
709 | kfree(m->balls[i]); | |
710 | #endif | |
711 | ||
712 | } | |
713 | ||
714 | /* Free all data except for GPIO pins unless CONFIG_DEBUG_FS is set */ | |
715 | static int __init omap_mux_late_init(void) | |
716 | { | |
112485e9 | 717 | struct omap_mux_partition *partition; |
15ac7afe | 718 | |
112485e9 BC |
719 | list_for_each_entry(partition, &mux_partitions, node) { |
720 | struct omap_mux_entry *e, *tmp; | |
721 | list_for_each_entry_safe(e, tmp, &partition->muxmodes, node) { | |
722 | struct omap_mux *m = &e->mux; | |
723 | u16 mode = omap_mux_read(partition, m->reg_offset); | |
15ac7afe | 724 | |
112485e9 BC |
725 | if (OMAP_MODE_GPIO(mode)) |
726 | continue; | |
15ac7afe TL |
727 | |
728 | #ifndef CONFIG_DEBUG_FS | |
112485e9 BC |
729 | mutex_lock(&muxmode_mutex); |
730 | list_del(&e->node); | |
731 | mutex_unlock(&muxmode_mutex); | |
732 | omap_mux_free_names(m); | |
733 | kfree(m); | |
1dbae815 | 734 | #endif |
112485e9 | 735 | } |
15ac7afe TL |
736 | } |
737 | ||
4b715efc TL |
738 | omap_mux_dbg_init(); |
739 | ||
15ac7afe TL |
740 | return 0; |
741 | } | |
742 | late_initcall(omap_mux_late_init); | |
743 | ||
744 | static void __init omap_mux_package_fixup(struct omap_mux *p, | |
745 | struct omap_mux *superset) | |
746 | { | |
747 | while (p->reg_offset != OMAP_MUX_TERMINATOR) { | |
748 | struct omap_mux *s = superset; | |
749 | int found = 0; | |
750 | ||
751 | while (s->reg_offset != OMAP_MUX_TERMINATOR) { | |
752 | if (s->reg_offset == p->reg_offset) { | |
753 | *s = *p; | |
754 | found++; | |
755 | break; | |
756 | } | |
757 | s++; | |
758 | } | |
759 | if (!found) | |
032a6424 | 760 | pr_err("%s: Unknown entry offset 0x%x\n", __func__, |
1cbb3a9a | 761 | p->reg_offset); |
15ac7afe TL |
762 | p++; |
763 | } | |
764 | } | |
765 | ||
766 | #ifdef CONFIG_DEBUG_FS | |
767 | ||
768 | static void __init omap_mux_package_init_balls(struct omap_ball *b, | |
769 | struct omap_mux *superset) | |
770 | { | |
771 | while (b->reg_offset != OMAP_MUX_TERMINATOR) { | |
772 | struct omap_mux *s = superset; | |
773 | int found = 0; | |
774 | ||
775 | while (s->reg_offset != OMAP_MUX_TERMINATOR) { | |
776 | if (s->reg_offset == b->reg_offset) { | |
777 | s->balls[0] = b->balls[0]; | |
778 | s->balls[1] = b->balls[1]; | |
779 | found++; | |
780 | break; | |
781 | } | |
782 | s++; | |
783 | } | |
784 | if (!found) | |
032a6424 | 785 | pr_err("%s: Unknown ball offset 0x%x\n", __func__, |
1cbb3a9a | 786 | b->reg_offset); |
15ac7afe TL |
787 | b++; |
788 | } | |
789 | } | |
790 | ||
791 | #else /* CONFIG_DEBUG_FS */ | |
792 | ||
793 | static inline void omap_mux_package_init_balls(struct omap_ball *b, | |
794 | struct omap_mux *superset) | |
795 | { | |
796 | } | |
797 | ||
798 | #endif /* CONFIG_DEBUG_FS */ | |
799 | ||
800 | static int __init omap_mux_setup(char *options) | |
801 | { | |
802 | if (!options) | |
803 | return 0; | |
804 | ||
805 | omap_mux_options = options; | |
806 | ||
807 | return 1; | |
808 | } | |
809 | __setup("omap_mux=", omap_mux_setup); | |
810 | ||
811 | /* | |
812 | * Note that the omap_mux=some.signal1=0x1234,some.signal2=0x1234 | |
813 | * cmdline options only override the bootloader values. | |
814 | * During development, please enable CONFIG_DEBUG_FS, and use the | |
815 | * signal specific entries under debugfs. | |
816 | */ | |
817 | static void __init omap_mux_set_cmdline_signals(void) | |
818 | { | |
819 | char *options, *next_opt, *token; | |
820 | ||
821 | if (!omap_mux_options) | |
822 | return; | |
823 | ||
dccb3b0e | 824 | options = kstrdup(omap_mux_options, GFP_KERNEL); |
15ac7afe TL |
825 | if (!options) |
826 | return; | |
827 | ||
15ac7afe TL |
828 | next_opt = options; |
829 | ||
830 | while ((token = strsep(&next_opt, ",")) != NULL) { | |
831 | char *keyval, *name; | |
832 | unsigned long val; | |
833 | ||
834 | keyval = token; | |
835 | name = strsep(&keyval, "="); | |
836 | if (name) { | |
837 | int res; | |
838 | ||
839 | res = strict_strtoul(keyval, 0x10, &val); | |
840 | if (res < 0) | |
841 | continue; | |
842 | ||
843 | omap_mux_init_signal(name, (u16)val); | |
844 | } | |
845 | } | |
846 | ||
847 | kfree(options); | |
848 | } | |
849 | ||
15ac7afe | 850 | static int __init omap_mux_copy_names(struct omap_mux *src, |
112485e9 | 851 | struct omap_mux *dst) |
15ac7afe TL |
852 | { |
853 | int i; | |
854 | ||
855 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) { | |
856 | if (src->muxnames[i]) { | |
dccb3b0e TM |
857 | dst->muxnames[i] = kstrdup(src->muxnames[i], |
858 | GFP_KERNEL); | |
15ac7afe TL |
859 | if (!dst->muxnames[i]) |
860 | goto free; | |
15ac7afe TL |
861 | } |
862 | } | |
863 | ||
864 | #ifdef CONFIG_DEBUG_FS | |
865 | for (i = 0; i < OMAP_MUX_NR_SIDES; i++) { | |
866 | if (src->balls[i]) { | |
dccb3b0e | 867 | dst->balls[i] = kstrdup(src->balls[i], GFP_KERNEL); |
15ac7afe TL |
868 | if (!dst->balls[i]) |
869 | goto free; | |
15ac7afe TL |
870 | } |
871 | } | |
872 | #endif | |
873 | ||
874 | return 0; | |
875 | ||
876 | free: | |
877 | omap_mux_free_names(dst); | |
878 | return -ENOMEM; | |
879 | ||
880 | } | |
881 | ||
882 | #endif /* CONFIG_OMAP_MUX */ | |
883 | ||
112485e9 BC |
884 | static struct omap_mux *omap_mux_get_by_gpio( |
885 | struct omap_mux_partition *partition, | |
886 | int gpio) | |
15ac7afe TL |
887 | { |
888 | struct omap_mux_entry *e; | |
112485e9 | 889 | struct omap_mux *ret = NULL; |
15ac7afe | 890 | |
112485e9 | 891 | list_for_each_entry(e, &partition->muxmodes, node) { |
15ac7afe TL |
892 | struct omap_mux *m = &e->mux; |
893 | if (m->gpio == gpio) { | |
112485e9 | 894 | ret = m; |
15ac7afe TL |
895 | break; |
896 | } | |
897 | } | |
898 | ||
112485e9 | 899 | return ret; |
15ac7afe TL |
900 | } |
901 | ||
902 | /* Needed for dynamic muxing of GPIO pins for off-idle */ | |
903 | u16 omap_mux_get_gpio(int gpio) | |
904 | { | |
112485e9 | 905 | struct omap_mux_partition *partition; |
30ebad9d | 906 | struct omap_mux *m = NULL; |
15ac7afe | 907 | |
112485e9 BC |
908 | list_for_each_entry(partition, &mux_partitions, node) { |
909 | m = omap_mux_get_by_gpio(partition, gpio); | |
910 | if (m) | |
911 | return omap_mux_read(partition, m->reg_offset); | |
15ac7afe TL |
912 | } |
913 | ||
112485e9 | 914 | if (!m || m->reg_offset == OMAP_MUX_TERMINATOR) |
032a6424 | 915 | pr_err("%s: Could not get gpio%i\n", __func__, gpio); |
112485e9 BC |
916 | |
917 | return OMAP_MUX_TERMINATOR; | |
15ac7afe TL |
918 | } |
919 | ||
920 | /* Needed for dynamic muxing of GPIO pins for off-idle */ | |
921 | void omap_mux_set_gpio(u16 val, int gpio) | |
922 | { | |
112485e9 BC |
923 | struct omap_mux_partition *partition; |
924 | struct omap_mux *m = NULL; | |
15ac7afe | 925 | |
112485e9 BC |
926 | list_for_each_entry(partition, &mux_partitions, node) { |
927 | m = omap_mux_get_by_gpio(partition, gpio); | |
928 | if (m) { | |
929 | omap_mux_write(partition, val, m->reg_offset); | |
930 | return; | |
931 | } | |
15ac7afe TL |
932 | } |
933 | ||
112485e9 | 934 | if (!m || m->reg_offset == OMAP_MUX_TERMINATOR) |
032a6424 | 935 | pr_err("%s: Could not set gpio%i\n", __func__, gpio); |
15ac7afe TL |
936 | } |
937 | ||
112485e9 BC |
938 | static struct omap_mux * __init omap_mux_list_add( |
939 | struct omap_mux_partition *partition, | |
940 | struct omap_mux *src) | |
15ac7afe TL |
941 | { |
942 | struct omap_mux_entry *entry; | |
943 | struct omap_mux *m; | |
944 | ||
945 | entry = kzalloc(sizeof(struct omap_mux_entry), GFP_KERNEL); | |
946 | if (!entry) | |
947 | return NULL; | |
948 | ||
949 | m = &entry->mux; | |
30833142 | 950 | entry->mux = *src; |
15ac7afe TL |
951 | |
952 | #ifdef CONFIG_OMAP_MUX | |
953 | if (omap_mux_copy_names(src, m)) { | |
954 | kfree(entry); | |
955 | return NULL; | |
956 | } | |
957 | #endif | |
958 | ||
959 | mutex_lock(&muxmode_mutex); | |
112485e9 | 960 | list_add_tail(&entry->node, &partition->muxmodes); |
15ac7afe TL |
961 | mutex_unlock(&muxmode_mutex); |
962 | ||
963 | return m; | |
964 | } | |
965 | ||
966 | /* | |
967 | * Note if CONFIG_OMAP_MUX is not selected, we will only initialize | |
968 | * the GPIO to mux offset mapping that is needed for dynamic muxing | |
969 | * of GPIO pins for off-idle. | |
970 | */ | |
112485e9 BC |
971 | static void __init omap_mux_init_list(struct omap_mux_partition *partition, |
972 | struct omap_mux *superset) | |
15ac7afe TL |
973 | { |
974 | while (superset->reg_offset != OMAP_MUX_TERMINATOR) { | |
975 | struct omap_mux *entry; | |
976 | ||
b72c7d54 RL |
977 | #ifdef CONFIG_OMAP_MUX |
978 | if (!superset->muxnames || !superset->muxnames[0]) { | |
15ac7afe TL |
979 | superset++; |
980 | continue; | |
981 | } | |
b72c7d54 RL |
982 | #else |
983 | /* Skip pins that are not muxed as GPIO by bootloader */ | |
112485e9 BC |
984 | if (!OMAP_MODE_GPIO(omap_mux_read(partition, |
985 | superset->reg_offset))) { | |
9ecef433 TL |
986 | superset++; |
987 | continue; | |
988 | } | |
989 | #endif | |
990 | ||
112485e9 | 991 | entry = omap_mux_list_add(partition, superset); |
15ac7afe | 992 | if (!entry) { |
032a6424 | 993 | pr_err("%s: Could not add entry\n", __func__); |
15ac7afe TL |
994 | return; |
995 | } | |
996 | superset++; | |
997 | } | |
998 | } | |
999 | ||
321cfc85 TL |
1000 | #ifdef CONFIG_OMAP_MUX |
1001 | ||
1002 | static void omap_mux_init_package(struct omap_mux *superset, | |
1003 | struct omap_mux *package_subset, | |
1004 | struct omap_ball *package_balls) | |
1005 | { | |
1006 | if (package_subset) | |
1007 | omap_mux_package_fixup(package_subset, superset); | |
1008 | if (package_balls) | |
1009 | omap_mux_package_init_balls(package_balls, superset); | |
1010 | } | |
1011 | ||
112485e9 BC |
1012 | static void omap_mux_init_signals(struct omap_mux_partition *partition, |
1013 | struct omap_board_mux *board_mux) | |
321cfc85 TL |
1014 | { |
1015 | omap_mux_set_cmdline_signals(); | |
112485e9 | 1016 | omap_mux_write_array(partition, board_mux); |
321cfc85 TL |
1017 | } |
1018 | ||
1019 | #else | |
1020 | ||
1021 | static void omap_mux_init_package(struct omap_mux *superset, | |
1022 | struct omap_mux *package_subset, | |
1023 | struct omap_ball *package_balls) | |
1024 | { | |
1025 | } | |
1026 | ||
112485e9 BC |
1027 | static void omap_mux_init_signals(struct omap_mux_partition *partition, |
1028 | struct omap_board_mux *board_mux) | |
321cfc85 TL |
1029 | { |
1030 | } | |
1031 | ||
1032 | #endif | |
1033 | ||
112485e9 | 1034 | static u32 mux_partitions_cnt; |
15ac7afe | 1035 | |
112485e9 BC |
1036 | int __init omap_mux_init(const char *name, u32 flags, |
1037 | u32 mux_pbase, u32 mux_size, | |
1038 | struct omap_mux *superset, | |
1039 | struct omap_mux *package_subset, | |
1040 | struct omap_board_mux *board_mux, | |
1041 | struct omap_ball *package_balls) | |
1042 | { | |
1043 | struct omap_mux_partition *partition; | |
1044 | ||
1045 | partition = kzalloc(sizeof(struct omap_mux_partition), GFP_KERNEL); | |
1046 | if (!partition) | |
1047 | return -ENOMEM; | |
1048 | ||
1049 | partition->name = name; | |
1050 | partition->flags = flags; | |
1051 | partition->size = mux_size; | |
1052 | partition->phys = mux_pbase; | |
1053 | partition->base = ioremap(mux_pbase, mux_size); | |
1054 | if (!partition->base) { | |
032a6424 DM |
1055 | pr_err("%s: Could not ioremap mux partition at 0x%08x\n", |
1056 | __func__, partition->phys); | |
9d47e309 | 1057 | kfree(partition); |
15ac7afe TL |
1058 | return -ENODEV; |
1059 | } | |
1060 | ||
112485e9 BC |
1061 | INIT_LIST_HEAD(&partition->muxmodes); |
1062 | ||
1063 | list_add_tail(&partition->node, &mux_partitions); | |
1064 | mux_partitions_cnt++; | |
032a6424 | 1065 | pr_info("%s: Add partition: #%d: %s, flags: %x\n", __func__, |
112485e9 | 1066 | mux_partitions_cnt, partition->name, partition->flags); |
d5425be6 | 1067 | |
321cfc85 | 1068 | omap_mux_init_package(superset, package_subset, package_balls); |
112485e9 BC |
1069 | omap_mux_init_list(partition, superset); |
1070 | omap_mux_init_signals(partition, board_mux); | |
2cb0c54f | 1071 | |
15ac7afe TL |
1072 | return 0; |
1073 | } | |
1074 |