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Diffstat (limited to 'arch/arm/mach-tegra/edp.c')
-rw-r--r--arch/arm/mach-tegra/edp.c515
1 files changed, 515 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/edp.c b/arch/arm/mach-tegra/edp.c
new file mode 100644
index 00000000000..a4be48fed4d
--- /dev/null
+++ b/arch/arm/mach-tegra/edp.c
@@ -0,0 +1,515 @@
1/*
2 * arch/arm/mach-tegra/edp.c
3 *
4 * Copyright (C) 2011 NVIDIA, Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 * 02111-1307, USA
19 */
20
21#include <linux/kernel.h>
22#include <linux/init.h>
23#include <linux/seq_file.h>
24#include <linux/slab.h>
25#include <mach/edp.h>
26
27#include "fuse.h"
28
29static const struct tegra_edp_limits *edp_limits;
30static int edp_limits_size;
31static unsigned int regulator_cur;
32
33static const unsigned int *system_edp_limits;
34
35/*
36 * Temperature step size cannot be less than 4C because of hysteresis
37 * delta
38 * Code assumes different temperatures for the same speedo_id /
39 * regulator_cur are adjacent in the table, and higest regulator_cur
40 * comes first
41 */
42static char __initdata tegra_edp_map[] = {
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243 0xa0, 0xa0, 0x8c, 0x0c, 0x3d, 0x46, 0xaa, 0xa0,
244 0x96, 0x8c, 0x0c, 0x3d, 0x4b, 0x8c, 0x82, 0x82,
245 0x82, 0x0c, 0x3d, 0x55, 0x8c, 0x82, 0x82, 0x82,
246 0x0c, 0x32, 0x17, 0xa5, 0x9b, 0x91, 0x87, 0x0c,
247 0x32, 0x2d, 0xaa, 0xa0, 0x96, 0x8c, 0x0c, 0x32,
248 0x3c, 0xaa, 0xa0, 0x96, 0x82, 0x0c, 0x32, 0x46,
249 0xaa, 0xa0, 0x8c, 0x78, 0x0c, 0x32, 0x4b, 0x8c,
250 0x82, 0x82, 0x78, 0x0c, 0x32, 0x55, 0x8c, 0x82,
251 0x82, 0x6e, 0x0c, 0x28, 0x17, 0xa5, 0x9b, 0x87,
252 0x73, 0x0c, 0x28, 0x2d, 0xaa, 0xa0, 0x8c, 0x78,
253 0x0c, 0x28, 0x3c, 0xaa, 0x96, 0x82, 0x73, 0x0c,
254 0x28, 0x46, 0xaa, 0x96, 0x78, 0x69, 0x0c, 0x28,
255 0x4b, 0x8c, 0x82, 0x78, 0x69, 0x0c, 0x28, 0x55,
256 0x8c, 0x82, 0x6e, 0x5a, 0x0c, 0x23, 0x17, 0xa5,
257 0x91, 0x7d, 0x69, 0x0c, 0x23, 0x2d, 0xaa, 0x96,
258 0x82, 0x6e, 0x0c, 0x23, 0x3c, 0xaa, 0x96, 0x78,
259 0x69, 0x0c, 0x23, 0x46, 0xaa, 0x8c, 0x6e, 0x5a,
260 0x0c, 0x23, 0x4b, 0x8c, 0x82, 0x6e, 0x5a, 0x0c,
261 0x23, 0x55, 0x8c, 0x82, 0x64, 0x50, 0x0d, 0x64,
262 0x17, 0xa5, 0x9b, 0x9b, 0x9b, 0x0d, 0x64, 0x2d,
263 0xaa, 0xa0, 0xa0, 0xa0, 0x0d, 0x64, 0x3c, 0xaa,
264 0xa0, 0xa0, 0xa0, 0x0d, 0x64, 0x46, 0xaa, 0xa0,
265 0xa0, 0xa0, 0x0d, 0x64, 0x4b, 0x8c, 0x82, 0x82,
266 0x82, 0x0d, 0x64, 0x55, 0x8c, 0x82, 0x82, 0x82,
267 0x0d, 0x50, 0x17, 0xa5, 0x9b, 0x9b, 0x9b, 0x0d,
268 0x50, 0x2d, 0xaa, 0xa0, 0xa0, 0xa0, 0x0d, 0x50,
269 0x3c, 0xaa, 0xa0, 0xa0, 0x96, 0x0d, 0x50, 0x46,
270 0xaa, 0xa0, 0xa0, 0x96, 0x0d, 0x50, 0x4b, 0x8c,
271 0x82, 0x82, 0x82, 0x0d, 0x50, 0x55, 0x8c, 0x82,
272 0x82, 0x82, 0x0d, 0x3c, 0x17, 0xa5, 0x9b, 0x9b,
273 0x87, 0x0d, 0x3c, 0x2d, 0xaa, 0xa0, 0xa0, 0x8c,
274 0x0d, 0x3c, 0x3c, 0xaa, 0xa0, 0x96, 0x82, 0x0d,
275 0x3c, 0x46, 0xaa, 0xa0, 0x96, 0x78, 0x0d, 0x3c,
276 0x4b, 0x8c, 0x82, 0x82, 0x78, 0x0d, 0x3c, 0x55,
277 0x8c, 0x82, 0x82, 0x6e, 0x0d, 0x28, 0x17, 0xa5,
278 0x91, 0x7d, 0x69, 0x0d, 0x28, 0x2d, 0xaa, 0x96,
279 0x82, 0x6e, 0x0d, 0x28, 0x3c, 0xaa, 0x96, 0x78,
280 0x64, 0x0d, 0x28, 0x46, 0xaa, 0x8c, 0x6e, 0x5a,
281 0x0d, 0x28, 0x4b, 0x8c, 0x82, 0x6e, 0x5a, 0x0d,
282 0x28, 0x55, 0x8c, 0x82, 0x64, 0x50,
283};
284
285
286static struct system_edp_entry __initdata tegra_system_edp_map[] = {
287
288/* {SKU, power-limit (in 100mW), {freq limits (in 10Mhz)} } */
289
290 { 1, 49, {130, 120, 120, 120} },
291 { 1, 44, {130, 120, 120, 110} },
292 { 1, 37, {130, 120, 110, 100} },
293 { 1, 35, {130, 120, 110, 90} },
294 { 1, 29, {130, 120, 100, 80} },
295 { 1, 27, {130, 120, 90, 80} },
296 { 1, 25, {130, 110, 80, 60} },
297 { 1, 21, {130, 100, 80, 40} },
298
299 { 4, 49, {130, 120, 120, 120} },
300 { 4, 44, {130, 120, 120, 110} },
301 { 4, 37, {130, 120, 110, 100} },
302 { 4, 35, {130, 120, 110, 90} },
303 { 4, 29, {130, 120, 100, 80} },
304 { 4, 27, {130, 120, 90, 80} },
305 { 4, 25, {130, 110, 80, 60} },
306 { 4, 21, {130, 100, 80, 40} },
307};
308
309/*
310 * "Safe entry" to be used when no match for speedo_id /
311 * regulator_cur is found; must be the last one
312 */
313static struct tegra_edp_limits edp_default_limits[] = {
314 {85, {1000000, 1000000, 1000000, 1000000} },
315};
316
317
318
319/*
320 * Specify regulator current in mA, e.g. 5000mA
321 * Use 0 for default
322 */
323void __init tegra_init_cpu_edp_limits(unsigned int regulator_mA)
324{
325 int cpu_speedo_id = tegra_cpu_speedo_id();
326 int i, j;
327 struct tegra_edp_limits *e;
328 struct tegra_edp_entry *t = (struct tegra_edp_entry *)tegra_edp_map;
329 int tsize = sizeof(tegra_edp_map)/sizeof(struct tegra_edp_entry);
330
331 if (!regulator_mA) {
332 edp_limits = edp_default_limits;
333 edp_limits_size = ARRAY_SIZE(edp_default_limits);
334 return;
335 }
336 regulator_cur = regulator_mA;
337
338 for (i = 0; i < tsize; i++) {
339 if (t[i].speedo_id == cpu_speedo_id &&
340 t[i].regulator_100mA <= regulator_mA / 100)
341 break;
342 }
343
344 /* No entry found in tegra_edp_map */
345 if (i >= tsize) {
346 edp_limits = edp_default_limits;
347 edp_limits_size = ARRAY_SIZE(edp_default_limits);
348 return;
349 }
350
351 /* Find all rows for this entry */
352 for (j = i + 1; j < tsize; j++) {
353 if (t[i].speedo_id != t[j].speedo_id ||
354 t[i].regulator_100mA != t[j].regulator_100mA)
355 break;
356 }
357
358 edp_limits_size = j - i;
359 e = kmalloc(sizeof(struct tegra_edp_limits) * edp_limits_size,
360 GFP_KERNEL);
361 BUG_ON(!e);
362
363 for (j = 0; j < edp_limits_size; j++) {
364 e[j].temperature = (int)t[i+j].temperature;
365 e[j].freq_limits[0] = (unsigned int)t[i+j].freq_limits[0] * 10000;
366 e[j].freq_limits[1] = (unsigned int)t[i+j].freq_limits[1] * 10000;
367 e[j].freq_limits[2] = (unsigned int)t[i+j].freq_limits[2] * 10000;
368 e[j].freq_limits[3] = (unsigned int)t[i+j].freq_limits[3] * 10000;
369 }
370
371 if (edp_limits != edp_default_limits)
372 kfree(edp_limits);
373
374 edp_limits = e;
375}
376
377
378void __init tegra_init_system_edp_limits(unsigned int power_limit_mW)
379{
380 int cpu_speedo_id = tegra_cpu_speedo_id();
381 int i;
382 unsigned int *e;
383 struct system_edp_entry *t =
384 (struct system_edp_entry *)tegra_system_edp_map;
385 int tsize = sizeof(tegra_system_edp_map) /
386 sizeof(struct system_edp_entry);
387
388 if (!power_limit_mW) {
389 e = NULL;
390 goto out;
391 }
392
393 for (i = 0; i < tsize; i++)
394 if (t[i].speedo_id == cpu_speedo_id)
395 break;
396
397 if (i >= tsize) {
398 e = NULL;
399 goto out;
400 }
401
402 do {
403 if (t[i].power_limit_100mW <= power_limit_mW / 100)
404 break;
405 i++;
406 } while (i < tsize && t[i].speedo_id == cpu_speedo_id);
407
408 if (i >= tsize || t[i].speedo_id != cpu_speedo_id)
409 i--; /* No low enough entry in the table, use best possible */
410
411 e = kmalloc(sizeof(unsigned int) * 4, GFP_KERNEL);
412 BUG_ON(!e);
413
414 e[0] = (unsigned int)t[i].freq_limits[0] * 10000;
415 e[1] = (unsigned int)t[i].freq_limits[1] * 10000;
416 e[2] = (unsigned int)t[i].freq_limits[2] * 10000;
417 e[3] = (unsigned int)t[i].freq_limits[3] * 10000;
418
419out:
420 kfree(system_edp_limits);
421
422 system_edp_limits = e;
423}
424
425
426void tegra_get_cpu_edp_limits(const struct tegra_edp_limits **limits, int *size)
427{
428 *limits = edp_limits;
429 *size = edp_limits_size;
430}
431
432void tegra_get_system_edp_limits(const unsigned int **limits)
433{
434 *limits = system_edp_limits;
435}
436
437#ifdef CONFIG_DEBUG_FS
438
439static int edp_limit_debugfs_show(struct seq_file *s, void *data)
440{
441 seq_printf(s, "%u\n", tegra_get_edp_limit());
442 return 0;
443}
444
445static int edp_debugfs_show(struct seq_file *s, void *data)
446{
447 int i;
448
449 seq_printf(s, "-- CPU %sEDP table (%umA) --\n",
450 edp_limits == edp_default_limits ? "default " : "",
451 regulator_cur);
452 for (i = 0; i < edp_limits_size; i++) {
453 seq_printf(s, "%4dC: %10u %10u %10u %10u\n",
454 edp_limits[i].temperature,
455 edp_limits[i].freq_limits[0],
456 edp_limits[i].freq_limits[1],
457 edp_limits[i].freq_limits[2],
458 edp_limits[i].freq_limits[3]);
459 }
460
461 if (system_edp_limits) {
462 seq_printf(s, "\n-- System EDP table --\n");
463 seq_printf(s, "%10u %10u %10u %10u\n",
464 system_edp_limits[0],
465 system_edp_limits[1],
466 system_edp_limits[2],
467 system_edp_limits[3]);
468 }
469
470 return 0;
471}
472
473
474static int edp_debugfs_open(struct inode *inode, struct file *file)
475{
476 return single_open(file, edp_debugfs_show, inode->i_private);
477}
478
479static int edp_limit_debugfs_open(struct inode *inode, struct file *file)
480{
481 return single_open(file, edp_limit_debugfs_show, inode->i_private);
482}
483
484
485static const struct file_operations edp_debugfs_fops = {
486 .open = edp_debugfs_open,
487 .read = seq_read,
488 .llseek = seq_lseek,
489 .release = single_release,
490};
491
492static const struct file_operations edp_limit_debugfs_fops = {
493 .open = edp_limit_debugfs_open,
494 .read = seq_read,
495 .llseek = seq_lseek,
496 .release = single_release,
497};
498
499static int __init tegra_edp_debugfs_init(void)
500{
501 struct dentry *d;
502
503 d = debugfs_create_file("edp", S_IRUGO, NULL, NULL,
504 &edp_debugfs_fops);
505 if (!d)
506 return -ENOMEM;
507
508 d = debugfs_create_file("edp_limit", S_IRUGO, NULL, NULL,
509 &edp_limit_debugfs_fops);
510
511 return 0;
512}
513
514late_initcall(tegra_edp_debugfs_init);
515#endif /* CONFIG_DEBUG_FS */
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-14 23:52:27 -0400