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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; | |
261 | int i; | |
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; | |
305 | pr_debug("%s: Initialized %s\n", __func__, pad->name); | |
306 | } | |
307 | ||
308 | return hmux; | |
309 | ||
310 | err3: | |
311 | kfree(hmux->pads); | |
312 | err2: | |
313 | kfree(hmux); | |
314 | err1: | |
315 | pr_err("%s: Could not allocate device mux entry\n", __func__); | |
316 | ||
317 | return NULL; | |
318 | } | |
319 | ||
8d9af88f TL |
320 | /* Assumes the calling function takes care of locking */ |
321 | void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state) | |
322 | { | |
323 | int i; | |
324 | ||
325 | for (i = 0; i < hmux->nr_pads; i++) { | |
326 | struct omap_device_pad *pad = &hmux->pads[i]; | |
327 | int flags, val = -EINVAL; | |
328 | ||
329 | flags = pad->flags; | |
330 | ||
331 | switch (state) { | |
332 | case _HWMOD_STATE_ENABLED: | |
333 | if (flags & OMAP_DEVICE_PAD_ENABLED) | |
334 | break; | |
335 | flags |= OMAP_DEVICE_PAD_ENABLED; | |
336 | val = pad->enable; | |
337 | pr_debug("%s: Enabling %s %x\n", __func__, | |
338 | pad->name, val); | |
339 | break; | |
340 | case _HWMOD_STATE_IDLE: | |
341 | if (!(flags & OMAP_DEVICE_PAD_REMUX)) | |
342 | break; | |
343 | flags &= ~OMAP_DEVICE_PAD_ENABLED; | |
344 | val = pad->idle; | |
345 | pr_debug("%s: Idling %s %x\n", __func__, | |
346 | pad->name, val); | |
347 | break; | |
348 | case _HWMOD_STATE_DISABLED: | |
349 | default: | |
350 | /* Use safe mode unless OMAP_DEVICE_PAD_REMUX */ | |
351 | if (flags & OMAP_DEVICE_PAD_REMUX) | |
352 | val = pad->off; | |
353 | else | |
354 | val = OMAP_MUX_MODE7; | |
355 | flags &= ~OMAP_DEVICE_PAD_ENABLED; | |
356 | pr_debug("%s: Disabling %s %x\n", __func__, | |
357 | pad->name, val); | |
358 | }; | |
359 | ||
360 | if (val >= 0) { | |
361 | omap_mux_write(pad->partition, val, | |
362 | pad->mux->reg_offset); | |
363 | pad->flags = flags; | |
364 | } | |
365 | } | |
366 | } | |
367 | ||
4b715efc TL |
368 | #ifdef CONFIG_DEBUG_FS |
369 | ||
370 | #define OMAP_MUX_MAX_NR_FLAGS 10 | |
371 | #define OMAP_MUX_TEST_FLAG(val, mask) \ | |
372 | if (((val) & (mask)) == (mask)) { \ | |
373 | i++; \ | |
374 | flags[i] = #mask; \ | |
375 | } | |
376 | ||
377 | /* REVISIT: Add checking for non-optimal mux settings */ | |
378 | static inline void omap_mux_decode(struct seq_file *s, u16 val) | |
379 | { | |
380 | char *flags[OMAP_MUX_MAX_NR_FLAGS]; | |
78737ae1 | 381 | char mode[sizeof("OMAP_MUX_MODE") + 1]; |
4b715efc TL |
382 | int i = -1; |
383 | ||
384 | sprintf(mode, "OMAP_MUX_MODE%d", val & 0x7); | |
385 | i++; | |
386 | flags[i] = mode; | |
387 | ||
388 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_OFF_WAKEUPENABLE); | |
389 | if (val & OMAP_OFF_EN) { | |
390 | if (!(val & OMAP_OFFOUT_EN)) { | |
391 | if (!(val & OMAP_OFF_PULL_UP)) { | |
392 | OMAP_MUX_TEST_FLAG(val, | |
393 | OMAP_PIN_OFF_INPUT_PULLDOWN); | |
394 | } else { | |
395 | OMAP_MUX_TEST_FLAG(val, | |
396 | OMAP_PIN_OFF_INPUT_PULLUP); | |
397 | } | |
398 | } else { | |
399 | if (!(val & OMAP_OFFOUT_VAL)) { | |
400 | OMAP_MUX_TEST_FLAG(val, | |
401 | OMAP_PIN_OFF_OUTPUT_LOW); | |
402 | } else { | |
403 | OMAP_MUX_TEST_FLAG(val, | |
404 | OMAP_PIN_OFF_OUTPUT_HIGH); | |
405 | } | |
406 | } | |
407 | } | |
408 | ||
409 | if (val & OMAP_INPUT_EN) { | |
410 | if (val & OMAP_PULL_ENA) { | |
411 | if (!(val & OMAP_PULL_UP)) { | |
412 | OMAP_MUX_TEST_FLAG(val, | |
413 | OMAP_PIN_INPUT_PULLDOWN); | |
414 | } else { | |
415 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT_PULLUP); | |
416 | } | |
417 | } else { | |
418 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT); | |
419 | } | |
420 | } else { | |
421 | i++; | |
422 | flags[i] = "OMAP_PIN_OUTPUT"; | |
423 | } | |
424 | ||
425 | do { | |
426 | seq_printf(s, "%s", flags[i]); | |
427 | if (i > 0) | |
428 | seq_printf(s, " | "); | |
429 | } while (i-- > 0); | |
430 | } | |
431 | ||
112485e9 | 432 | #define OMAP_MUX_DEFNAME_LEN 32 |
4b715efc TL |
433 | |
434 | static int omap_mux_dbg_board_show(struct seq_file *s, void *unused) | |
435 | { | |
112485e9 | 436 | struct omap_mux_partition *partition = s->private; |
4b715efc | 437 | struct omap_mux_entry *e; |
112485e9 | 438 | u8 omap_gen = omap_rev() >> 28; |
4b715efc | 439 | |
112485e9 | 440 | list_for_each_entry(e, &partition->muxmodes, node) { |
4b715efc TL |
441 | struct omap_mux *m = &e->mux; |
442 | char m0_def[OMAP_MUX_DEFNAME_LEN]; | |
443 | char *m0_name = m->muxnames[0]; | |
444 | u16 val; | |
445 | int i, mode; | |
446 | ||
447 | if (!m0_name) | |
448 | continue; | |
449 | ||
78737ae1 | 450 | /* REVISIT: Needs to be updated if mode0 names get longer */ |
4b715efc TL |
451 | for (i = 0; i < OMAP_MUX_DEFNAME_LEN; i++) { |
452 | if (m0_name[i] == '\0') { | |
453 | m0_def[i] = m0_name[i]; | |
454 | break; | |
455 | } | |
456 | m0_def[i] = toupper(m0_name[i]); | |
457 | } | |
112485e9 | 458 | val = omap_mux_read(partition, m->reg_offset); |
4b715efc | 459 | mode = val & OMAP_MUX_MODE7; |
112485e9 BC |
460 | if (mode != 0) |
461 | seq_printf(s, "/* %s */\n", m->muxnames[mode]); | |
462 | ||
463 | /* | |
464 | * XXX: Might be revisited to support differences accross | |
465 | * same OMAP generation. | |
466 | */ | |
467 | seq_printf(s, "OMAP%d_MUX(%s, ", omap_gen, m0_def); | |
4b715efc TL |
468 | omap_mux_decode(s, val); |
469 | seq_printf(s, "),\n"); | |
470 | } | |
471 | ||
472 | return 0; | |
473 | } | |
474 | ||
475 | static int omap_mux_dbg_board_open(struct inode *inode, struct file *file) | |
476 | { | |
112485e9 | 477 | return single_open(file, omap_mux_dbg_board_show, inode->i_private); |
4b715efc TL |
478 | } |
479 | ||
480 | static const struct file_operations omap_mux_dbg_board_fops = { | |
481 | .open = omap_mux_dbg_board_open, | |
482 | .read = seq_read, | |
483 | .llseek = seq_lseek, | |
484 | .release = single_release, | |
485 | }; | |
486 | ||
112485e9 BC |
487 | static struct omap_mux_partition *omap_mux_get_partition(struct omap_mux *mux) |
488 | { | |
489 | struct omap_mux_partition *partition; | |
490 | ||
491 | list_for_each_entry(partition, &mux_partitions, node) { | |
492 | struct list_head *muxmodes = &partition->muxmodes; | |
493 | struct omap_mux_entry *e; | |
494 | ||
495 | list_for_each_entry(e, muxmodes, node) { | |
496 | struct omap_mux *m = &e->mux; | |
497 | ||
498 | if (m == mux) | |
499 | return partition; | |
500 | } | |
501 | } | |
502 | ||
503 | return NULL; | |
504 | } | |
505 | ||
4b715efc TL |
506 | static int omap_mux_dbg_signal_show(struct seq_file *s, void *unused) |
507 | { | |
508 | struct omap_mux *m = s->private; | |
112485e9 | 509 | struct omap_mux_partition *partition; |
4b715efc TL |
510 | const char *none = "NA"; |
511 | u16 val; | |
512 | int mode; | |
513 | ||
112485e9 BC |
514 | partition = omap_mux_get_partition(m); |
515 | if (!partition) | |
516 | return 0; | |
517 | ||
518 | val = omap_mux_read(partition, m->reg_offset); | |
4b715efc TL |
519 | mode = val & OMAP_MUX_MODE7; |
520 | ||
112485e9 | 521 | seq_printf(s, "name: %s.%s (0x%08x/0x%03x = 0x%04x), b %s, t %s\n", |
4b715efc | 522 | m->muxnames[0], m->muxnames[mode], |
112485e9 | 523 | partition->phys + m->reg_offset, m->reg_offset, val, |
4b715efc TL |
524 | m->balls[0] ? m->balls[0] : none, |
525 | m->balls[1] ? m->balls[1] : none); | |
526 | seq_printf(s, "mode: "); | |
527 | omap_mux_decode(s, val); | |
528 | seq_printf(s, "\n"); | |
529 | seq_printf(s, "signals: %s | %s | %s | %s | %s | %s | %s | %s\n", | |
530 | m->muxnames[0] ? m->muxnames[0] : none, | |
531 | m->muxnames[1] ? m->muxnames[1] : none, | |
532 | m->muxnames[2] ? m->muxnames[2] : none, | |
533 | m->muxnames[3] ? m->muxnames[3] : none, | |
534 | m->muxnames[4] ? m->muxnames[4] : none, | |
535 | m->muxnames[5] ? m->muxnames[5] : none, | |
536 | m->muxnames[6] ? m->muxnames[6] : none, | |
537 | m->muxnames[7] ? m->muxnames[7] : none); | |
538 | ||
539 | return 0; | |
540 | } | |
541 | ||
542 | #define OMAP_MUX_MAX_ARG_CHAR 7 | |
543 | ||
544 | static ssize_t omap_mux_dbg_signal_write(struct file *file, | |
112485e9 BC |
545 | const char __user *user_buf, |
546 | size_t count, loff_t *ppos) | |
4b715efc TL |
547 | { |
548 | char buf[OMAP_MUX_MAX_ARG_CHAR]; | |
549 | struct seq_file *seqf; | |
550 | struct omap_mux *m; | |
551 | unsigned long val; | |
552 | int buf_size, ret; | |
112485e9 | 553 | struct omap_mux_partition *partition; |
4b715efc TL |
554 | |
555 | if (count > OMAP_MUX_MAX_ARG_CHAR) | |
556 | return -EINVAL; | |
557 | ||
558 | memset(buf, 0, sizeof(buf)); | |
559 | buf_size = min(count, sizeof(buf) - 1); | |
560 | ||
561 | if (copy_from_user(buf, user_buf, buf_size)) | |
562 | return -EFAULT; | |
563 | ||
564 | ret = strict_strtoul(buf, 0x10, &val); | |
565 | if (ret < 0) | |
566 | return ret; | |
567 | ||
568 | if (val > 0xffff) | |
569 | return -EINVAL; | |
570 | ||
571 | seqf = file->private_data; | |
572 | m = seqf->private; | |
573 | ||
112485e9 BC |
574 | partition = omap_mux_get_partition(m); |
575 | if (!partition) | |
576 | return -ENODEV; | |
577 | ||
578 | omap_mux_write(partition, (u16)val, m->reg_offset); | |
4b715efc TL |
579 | *ppos += count; |
580 | ||
581 | return count; | |
582 | } | |
583 | ||
584 | static int omap_mux_dbg_signal_open(struct inode *inode, struct file *file) | |
585 | { | |
586 | return single_open(file, omap_mux_dbg_signal_show, inode->i_private); | |
587 | } | |
588 | ||
589 | static const struct file_operations omap_mux_dbg_signal_fops = { | |
590 | .open = omap_mux_dbg_signal_open, | |
591 | .read = seq_read, | |
592 | .write = omap_mux_dbg_signal_write, | |
593 | .llseek = seq_lseek, | |
594 | .release = single_release, | |
595 | }; | |
596 | ||
597 | static struct dentry *mux_dbg_dir; | |
598 | ||
112485e9 BC |
599 | static void __init omap_mux_dbg_create_entry( |
600 | struct omap_mux_partition *partition, | |
601 | struct dentry *mux_dbg_dir) | |
4b715efc TL |
602 | { |
603 | struct omap_mux_entry *e; | |
604 | ||
112485e9 BC |
605 | list_for_each_entry(e, &partition->muxmodes, node) { |
606 | struct omap_mux *m = &e->mux; | |
607 | ||
608 | (void)debugfs_create_file(m->muxnames[0], S_IWUGO, mux_dbg_dir, | |
609 | m, &omap_mux_dbg_signal_fops); | |
610 | } | |
611 | } | |
612 | ||
613 | static void __init omap_mux_dbg_init(void) | |
614 | { | |
615 | struct omap_mux_partition *partition; | |
616 | static struct dentry *mux_dbg_board_dir; | |
617 | ||
4b715efc TL |
618 | mux_dbg_dir = debugfs_create_dir("omap_mux", NULL); |
619 | if (!mux_dbg_dir) | |
620 | return; | |
621 | ||
112485e9 BC |
622 | mux_dbg_board_dir = debugfs_create_dir("board", mux_dbg_dir); |
623 | if (!mux_dbg_board_dir) | |
624 | return; | |
4b715efc | 625 | |
112485e9 BC |
626 | list_for_each_entry(partition, &mux_partitions, node) { |
627 | omap_mux_dbg_create_entry(partition, mux_dbg_dir); | |
628 | (void)debugfs_create_file(partition->name, S_IRUGO, | |
629 | mux_dbg_board_dir, partition, | |
630 | &omap_mux_dbg_board_fops); | |
4b715efc TL |
631 | } |
632 | } | |
633 | ||
634 | #else | |
635 | static inline void omap_mux_dbg_init(void) | |
636 | { | |
637 | } | |
638 | #endif /* CONFIG_DEBUG_FS */ | |
639 | ||
15ac7afe TL |
640 | static void __init omap_mux_free_names(struct omap_mux *m) |
641 | { | |
642 | int i; | |
643 | ||
644 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) | |
645 | kfree(m->muxnames[i]); | |
646 | ||
647 | #ifdef CONFIG_DEBUG_FS | |
648 | for (i = 0; i < OMAP_MUX_NR_SIDES; i++) | |
649 | kfree(m->balls[i]); | |
650 | #endif | |
651 | ||
652 | } | |
653 | ||
654 | /* Free all data except for GPIO pins unless CONFIG_DEBUG_FS is set */ | |
655 | static int __init omap_mux_late_init(void) | |
656 | { | |
112485e9 | 657 | struct omap_mux_partition *partition; |
15ac7afe | 658 | |
112485e9 BC |
659 | list_for_each_entry(partition, &mux_partitions, node) { |
660 | struct omap_mux_entry *e, *tmp; | |
661 | list_for_each_entry_safe(e, tmp, &partition->muxmodes, node) { | |
662 | struct omap_mux *m = &e->mux; | |
663 | u16 mode = omap_mux_read(partition, m->reg_offset); | |
15ac7afe | 664 | |
112485e9 BC |
665 | if (OMAP_MODE_GPIO(mode)) |
666 | continue; | |
15ac7afe TL |
667 | |
668 | #ifndef CONFIG_DEBUG_FS | |
112485e9 BC |
669 | mutex_lock(&muxmode_mutex); |
670 | list_del(&e->node); | |
671 | mutex_unlock(&muxmode_mutex); | |
672 | omap_mux_free_names(m); | |
673 | kfree(m); | |
1dbae815 | 674 | #endif |
112485e9 | 675 | } |
15ac7afe TL |
676 | } |
677 | ||
4b715efc TL |
678 | omap_mux_dbg_init(); |
679 | ||
15ac7afe TL |
680 | return 0; |
681 | } | |
682 | late_initcall(omap_mux_late_init); | |
683 | ||
684 | static void __init omap_mux_package_fixup(struct omap_mux *p, | |
685 | struct omap_mux *superset) | |
686 | { | |
687 | while (p->reg_offset != OMAP_MUX_TERMINATOR) { | |
688 | struct omap_mux *s = superset; | |
689 | int found = 0; | |
690 | ||
691 | while (s->reg_offset != OMAP_MUX_TERMINATOR) { | |
692 | if (s->reg_offset == p->reg_offset) { | |
693 | *s = *p; | |
694 | found++; | |
695 | break; | |
696 | } | |
697 | s++; | |
698 | } | |
699 | if (!found) | |
032a6424 | 700 | pr_err("%s: Unknown entry offset 0x%x\n", __func__, |
1cbb3a9a | 701 | p->reg_offset); |
15ac7afe TL |
702 | p++; |
703 | } | |
704 | } | |
705 | ||
706 | #ifdef CONFIG_DEBUG_FS | |
707 | ||
708 | static void __init omap_mux_package_init_balls(struct omap_ball *b, | |
709 | struct omap_mux *superset) | |
710 | { | |
711 | while (b->reg_offset != OMAP_MUX_TERMINATOR) { | |
712 | struct omap_mux *s = superset; | |
713 | int found = 0; | |
714 | ||
715 | while (s->reg_offset != OMAP_MUX_TERMINATOR) { | |
716 | if (s->reg_offset == b->reg_offset) { | |
717 | s->balls[0] = b->balls[0]; | |
718 | s->balls[1] = b->balls[1]; | |
719 | found++; | |
720 | break; | |
721 | } | |
722 | s++; | |
723 | } | |
724 | if (!found) | |
032a6424 | 725 | pr_err("%s: Unknown ball offset 0x%x\n", __func__, |
1cbb3a9a | 726 | b->reg_offset); |
15ac7afe TL |
727 | b++; |
728 | } | |
729 | } | |
730 | ||
731 | #else /* CONFIG_DEBUG_FS */ | |
732 | ||
733 | static inline void omap_mux_package_init_balls(struct omap_ball *b, | |
734 | struct omap_mux *superset) | |
735 | { | |
736 | } | |
737 | ||
738 | #endif /* CONFIG_DEBUG_FS */ | |
739 | ||
740 | static int __init omap_mux_setup(char *options) | |
741 | { | |
742 | if (!options) | |
743 | return 0; | |
744 | ||
745 | omap_mux_options = options; | |
746 | ||
747 | return 1; | |
748 | } | |
749 | __setup("omap_mux=", omap_mux_setup); | |
750 | ||
751 | /* | |
752 | * Note that the omap_mux=some.signal1=0x1234,some.signal2=0x1234 | |
753 | * cmdline options only override the bootloader values. | |
754 | * During development, please enable CONFIG_DEBUG_FS, and use the | |
755 | * signal specific entries under debugfs. | |
756 | */ | |
757 | static void __init omap_mux_set_cmdline_signals(void) | |
758 | { | |
759 | char *options, *next_opt, *token; | |
760 | ||
761 | if (!omap_mux_options) | |
762 | return; | |
763 | ||
764 | options = kmalloc(strlen(omap_mux_options) + 1, GFP_KERNEL); | |
765 | if (!options) | |
766 | return; | |
767 | ||
768 | strcpy(options, omap_mux_options); | |
769 | next_opt = options; | |
770 | ||
771 | while ((token = strsep(&next_opt, ",")) != NULL) { | |
772 | char *keyval, *name; | |
773 | unsigned long val; | |
774 | ||
775 | keyval = token; | |
776 | name = strsep(&keyval, "="); | |
777 | if (name) { | |
778 | int res; | |
779 | ||
780 | res = strict_strtoul(keyval, 0x10, &val); | |
781 | if (res < 0) | |
782 | continue; | |
783 | ||
784 | omap_mux_init_signal(name, (u16)val); | |
785 | } | |
786 | } | |
787 | ||
788 | kfree(options); | |
789 | } | |
790 | ||
15ac7afe | 791 | static int __init omap_mux_copy_names(struct omap_mux *src, |
112485e9 | 792 | struct omap_mux *dst) |
15ac7afe TL |
793 | { |
794 | int i; | |
795 | ||
796 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) { | |
797 | if (src->muxnames[i]) { | |
798 | dst->muxnames[i] = | |
799 | kmalloc(strlen(src->muxnames[i]) + 1, | |
800 | GFP_KERNEL); | |
801 | if (!dst->muxnames[i]) | |
802 | goto free; | |
803 | strcpy(dst->muxnames[i], src->muxnames[i]); | |
804 | } | |
805 | } | |
806 | ||
807 | #ifdef CONFIG_DEBUG_FS | |
808 | for (i = 0; i < OMAP_MUX_NR_SIDES; i++) { | |
809 | if (src->balls[i]) { | |
810 | dst->balls[i] = | |
811 | kmalloc(strlen(src->balls[i]) + 1, | |
812 | GFP_KERNEL); | |
813 | if (!dst->balls[i]) | |
814 | goto free; | |
815 | strcpy(dst->balls[i], src->balls[i]); | |
816 | } | |
817 | } | |
818 | #endif | |
819 | ||
820 | return 0; | |
821 | ||
822 | free: | |
823 | omap_mux_free_names(dst); | |
824 | return -ENOMEM; | |
825 | ||
826 | } | |
827 | ||
828 | #endif /* CONFIG_OMAP_MUX */ | |
829 | ||
112485e9 BC |
830 | static struct omap_mux *omap_mux_get_by_gpio( |
831 | struct omap_mux_partition *partition, | |
832 | int gpio) | |
15ac7afe TL |
833 | { |
834 | struct omap_mux_entry *e; | |
112485e9 | 835 | struct omap_mux *ret = NULL; |
15ac7afe | 836 | |
112485e9 | 837 | list_for_each_entry(e, &partition->muxmodes, node) { |
15ac7afe TL |
838 | struct omap_mux *m = &e->mux; |
839 | if (m->gpio == gpio) { | |
112485e9 | 840 | ret = m; |
15ac7afe TL |
841 | break; |
842 | } | |
843 | } | |
844 | ||
112485e9 | 845 | return ret; |
15ac7afe TL |
846 | } |
847 | ||
848 | /* Needed for dynamic muxing of GPIO pins for off-idle */ | |
849 | u16 omap_mux_get_gpio(int gpio) | |
850 | { | |
112485e9 BC |
851 | struct omap_mux_partition *partition; |
852 | struct omap_mux *m; | |
15ac7afe | 853 | |
112485e9 BC |
854 | list_for_each_entry(partition, &mux_partitions, node) { |
855 | m = omap_mux_get_by_gpio(partition, gpio); | |
856 | if (m) | |
857 | return omap_mux_read(partition, m->reg_offset); | |
15ac7afe TL |
858 | } |
859 | ||
112485e9 | 860 | if (!m || m->reg_offset == OMAP_MUX_TERMINATOR) |
032a6424 | 861 | pr_err("%s: Could not get gpio%i\n", __func__, gpio); |
112485e9 BC |
862 | |
863 | return OMAP_MUX_TERMINATOR; | |
15ac7afe TL |
864 | } |
865 | ||
866 | /* Needed for dynamic muxing of GPIO pins for off-idle */ | |
867 | void omap_mux_set_gpio(u16 val, int gpio) | |
868 | { | |
112485e9 BC |
869 | struct omap_mux_partition *partition; |
870 | struct omap_mux *m = NULL; | |
15ac7afe | 871 | |
112485e9 BC |
872 | list_for_each_entry(partition, &mux_partitions, node) { |
873 | m = omap_mux_get_by_gpio(partition, gpio); | |
874 | if (m) { | |
875 | omap_mux_write(partition, val, m->reg_offset); | |
876 | return; | |
877 | } | |
15ac7afe TL |
878 | } |
879 | ||
112485e9 | 880 | if (!m || m->reg_offset == OMAP_MUX_TERMINATOR) |
032a6424 | 881 | pr_err("%s: Could not set gpio%i\n", __func__, gpio); |
15ac7afe TL |
882 | } |
883 | ||
112485e9 BC |
884 | static struct omap_mux * __init omap_mux_list_add( |
885 | struct omap_mux_partition *partition, | |
886 | struct omap_mux *src) | |
15ac7afe TL |
887 | { |
888 | struct omap_mux_entry *entry; | |
889 | struct omap_mux *m; | |
890 | ||
891 | entry = kzalloc(sizeof(struct omap_mux_entry), GFP_KERNEL); | |
892 | if (!entry) | |
893 | return NULL; | |
894 | ||
895 | m = &entry->mux; | |
30833142 | 896 | entry->mux = *src; |
15ac7afe TL |
897 | |
898 | #ifdef CONFIG_OMAP_MUX | |
899 | if (omap_mux_copy_names(src, m)) { | |
900 | kfree(entry); | |
901 | return NULL; | |
902 | } | |
903 | #endif | |
904 | ||
905 | mutex_lock(&muxmode_mutex); | |
112485e9 | 906 | list_add_tail(&entry->node, &partition->muxmodes); |
15ac7afe TL |
907 | mutex_unlock(&muxmode_mutex); |
908 | ||
909 | return m; | |
910 | } | |
911 | ||
912 | /* | |
913 | * Note if CONFIG_OMAP_MUX is not selected, we will only initialize | |
914 | * the GPIO to mux offset mapping that is needed for dynamic muxing | |
915 | * of GPIO pins for off-idle. | |
916 | */ | |
112485e9 BC |
917 | static void __init omap_mux_init_list(struct omap_mux_partition *partition, |
918 | struct omap_mux *superset) | |
15ac7afe TL |
919 | { |
920 | while (superset->reg_offset != OMAP_MUX_TERMINATOR) { | |
921 | struct omap_mux *entry; | |
922 | ||
b72c7d54 RL |
923 | #ifdef CONFIG_OMAP_MUX |
924 | if (!superset->muxnames || !superset->muxnames[0]) { | |
15ac7afe TL |
925 | superset++; |
926 | continue; | |
927 | } | |
b72c7d54 RL |
928 | #else |
929 | /* Skip pins that are not muxed as GPIO by bootloader */ | |
112485e9 BC |
930 | if (!OMAP_MODE_GPIO(omap_mux_read(partition, |
931 | superset->reg_offset))) { | |
9ecef433 TL |
932 | superset++; |
933 | continue; | |
934 | } | |
935 | #endif | |
936 | ||
112485e9 | 937 | entry = omap_mux_list_add(partition, superset); |
15ac7afe | 938 | if (!entry) { |
032a6424 | 939 | pr_err("%s: Could not add entry\n", __func__); |
15ac7afe TL |
940 | return; |
941 | } | |
942 | superset++; | |
943 | } | |
944 | } | |
945 | ||
321cfc85 TL |
946 | #ifdef CONFIG_OMAP_MUX |
947 | ||
948 | static void omap_mux_init_package(struct omap_mux *superset, | |
949 | struct omap_mux *package_subset, | |
950 | struct omap_ball *package_balls) | |
951 | { | |
952 | if (package_subset) | |
953 | omap_mux_package_fixup(package_subset, superset); | |
954 | if (package_balls) | |
955 | omap_mux_package_init_balls(package_balls, superset); | |
956 | } | |
957 | ||
112485e9 BC |
958 | static void omap_mux_init_signals(struct omap_mux_partition *partition, |
959 | struct omap_board_mux *board_mux) | |
321cfc85 TL |
960 | { |
961 | omap_mux_set_cmdline_signals(); | |
112485e9 | 962 | omap_mux_write_array(partition, board_mux); |
321cfc85 TL |
963 | } |
964 | ||
965 | #else | |
966 | ||
967 | static void omap_mux_init_package(struct omap_mux *superset, | |
968 | struct omap_mux *package_subset, | |
969 | struct omap_ball *package_balls) | |
970 | { | |
971 | } | |
972 | ||
112485e9 BC |
973 | static void omap_mux_init_signals(struct omap_mux_partition *partition, |
974 | struct omap_board_mux *board_mux) | |
321cfc85 TL |
975 | { |
976 | } | |
977 | ||
978 | #endif | |
979 | ||
112485e9 | 980 | static u32 mux_partitions_cnt; |
15ac7afe | 981 | |
112485e9 BC |
982 | int __init omap_mux_init(const char *name, u32 flags, |
983 | u32 mux_pbase, u32 mux_size, | |
984 | struct omap_mux *superset, | |
985 | struct omap_mux *package_subset, | |
986 | struct omap_board_mux *board_mux, | |
987 | struct omap_ball *package_balls) | |
988 | { | |
989 | struct omap_mux_partition *partition; | |
990 | ||
991 | partition = kzalloc(sizeof(struct omap_mux_partition), GFP_KERNEL); | |
992 | if (!partition) | |
993 | return -ENOMEM; | |
994 | ||
995 | partition->name = name; | |
996 | partition->flags = flags; | |
997 | partition->size = mux_size; | |
998 | partition->phys = mux_pbase; | |
999 | partition->base = ioremap(mux_pbase, mux_size); | |
1000 | if (!partition->base) { | |
032a6424 DM |
1001 | pr_err("%s: Could not ioremap mux partition at 0x%08x\n", |
1002 | __func__, partition->phys); | |
9d47e309 | 1003 | kfree(partition); |
15ac7afe TL |
1004 | return -ENODEV; |
1005 | } | |
1006 | ||
112485e9 BC |
1007 | INIT_LIST_HEAD(&partition->muxmodes); |
1008 | ||
1009 | list_add_tail(&partition->node, &mux_partitions); | |
1010 | mux_partitions_cnt++; | |
032a6424 | 1011 | pr_info("%s: Add partition: #%d: %s, flags: %x\n", __func__, |
112485e9 | 1012 | mux_partitions_cnt, partition->name, partition->flags); |
d5425be6 | 1013 | |
321cfc85 | 1014 | omap_mux_init_package(superset, package_subset, package_balls); |
112485e9 BC |
1015 | omap_mux_init_list(partition, superset); |
1016 | omap_mux_init_signals(partition, board_mux); | |
2cb0c54f | 1017 | |
15ac7afe TL |
1018 | return 0; |
1019 | } | |
1020 |