1 /* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
2 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/types.h>
17 #include <linux/device.h>
18 #include <linux/io.h>
19 #include <linux/err.h>
20 #include <linux/fs.h>
21 #include <linux/slab.h>
22 #include <linux/delay.h>
23 #include <linux/smp.h>
24 #include <linux/sysfs.h>
25 #include <linux/stat.h>
26 #include <linux/clk.h>
27 #include <linux/cpu.h>
28 #include <linux/of.h>
29 #include <linux/coresight.h>
30 #include <linux/amba/bus.h>
31 #include <linux/seq_file.h>
32 #include <linux/uaccess.h>
33 #include <asm/sections.h>
34
35 #include "coresight-etm.h"
36
37 static int boot_enable;
38 module_param_named(boot_enable, boot_enable, int, S_IRUGO);
39
40 /* The number of ETM/PTM currently registered */
41 static int etm_count;
42 static struct etm_drvdata *etmdrvdata[NR_CPUS];
43
etm_writel(struct etm_drvdata * drvdata,u32 val,u32 off)44 static inline void etm_writel(struct etm_drvdata *drvdata,
45 u32 val, u32 off)
46 {
47 if (drvdata->use_cp14) {
48 if (etm_writel_cp14(off, val)) {
49 dev_err(drvdata->dev,
50 "invalid CP14 access to ETM reg: %#x", off);
51 }
52 } else {
53 writel_relaxed(val, drvdata->base + off);
54 }
55 }
56
etm_readl(struct etm_drvdata * drvdata,u32 off)57 static inline unsigned int etm_readl(struct etm_drvdata *drvdata, u32 off)
58 {
59 u32 val;
60
61 if (drvdata->use_cp14) {
62 if (etm_readl_cp14(off, &val)) {
63 dev_err(drvdata->dev,
64 "invalid CP14 access to ETM reg: %#x", off);
65 }
66 } else {
67 val = readl_relaxed(drvdata->base + off);
68 }
69
70 return val;
71 }
72
73 /*
74 * Memory mapped writes to clear os lock are not supported on some processors
75 * and OS lock must be unlocked before any memory mapped access on such
76 * processors, otherwise memory mapped reads/writes will be invalid.
77 */
etm_os_unlock(void * info)78 static void etm_os_unlock(void *info)
79 {
80 struct etm_drvdata *drvdata = (struct etm_drvdata *)info;
81 /* Writing any value to ETMOSLAR unlocks the trace registers */
82 etm_writel(drvdata, 0x0, ETMOSLAR);
83 isb();
84 }
85
etm_set_pwrdwn(struct etm_drvdata * drvdata)86 static void etm_set_pwrdwn(struct etm_drvdata *drvdata)
87 {
88 u32 etmcr;
89
90 /* Ensure pending cp14 accesses complete before setting pwrdwn */
91 mb();
92 isb();
93 etmcr = etm_readl(drvdata, ETMCR);
94 etmcr |= ETMCR_PWD_DWN;
95 etm_writel(drvdata, etmcr, ETMCR);
96 }
97
etm_clr_pwrdwn(struct etm_drvdata * drvdata)98 static void etm_clr_pwrdwn(struct etm_drvdata *drvdata)
99 {
100 u32 etmcr;
101
102 etmcr = etm_readl(drvdata, ETMCR);
103 etmcr &= ~ETMCR_PWD_DWN;
104 etm_writel(drvdata, etmcr, ETMCR);
105 /* Ensure pwrup completes before subsequent cp14 accesses */
106 mb();
107 isb();
108 }
109
etm_set_pwrup(struct etm_drvdata * drvdata)110 static void etm_set_pwrup(struct etm_drvdata *drvdata)
111 {
112 u32 etmpdcr;
113
114 etmpdcr = readl_relaxed(drvdata->base + ETMPDCR);
115 etmpdcr |= ETMPDCR_PWD_UP;
116 writel_relaxed(etmpdcr, drvdata->base + ETMPDCR);
117 /* Ensure pwrup completes before subsequent cp14 accesses */
118 mb();
119 isb();
120 }
121
etm_clr_pwrup(struct etm_drvdata * drvdata)122 static void etm_clr_pwrup(struct etm_drvdata *drvdata)
123 {
124 u32 etmpdcr;
125
126 /* Ensure pending cp14 accesses complete before clearing pwrup */
127 mb();
128 isb();
129 etmpdcr = readl_relaxed(drvdata->base + ETMPDCR);
130 etmpdcr &= ~ETMPDCR_PWD_UP;
131 writel_relaxed(etmpdcr, drvdata->base + ETMPDCR);
132 }
133
134 /**
135 * coresight_timeout_etm - loop until a bit has changed to a specific state.
136 * @drvdata: etm's private data structure.
137 * @offset: address of a register, starting from @addr.
138 * @position: the position of the bit of interest.
139 * @value: the value the bit should have.
140 *
141 * Basically the same as @coresight_timeout except for the register access
142 * method where we have to account for CP14 configurations.
143
144 * Return: 0 as soon as the bit has taken the desired state or -EAGAIN if
145 * TIMEOUT_US has elapsed, which ever happens first.
146 */
147
coresight_timeout_etm(struct etm_drvdata * drvdata,u32 offset,int position,int value)148 static int coresight_timeout_etm(struct etm_drvdata *drvdata, u32 offset,
149 int position, int value)
150 {
151 int i;
152 u32 val;
153
154 for (i = TIMEOUT_US; i > 0; i--) {
155 val = etm_readl(drvdata, offset);
156 /* Waiting on the bit to go from 0 to 1 */
157 if (value) {
158 if (val & BIT(position))
159 return 0;
160 /* Waiting on the bit to go from 1 to 0 */
161 } else {
162 if (!(val & BIT(position)))
163 return 0;
164 }
165
166 /*
167 * Delay is arbitrary - the specification doesn't say how long
168 * we are expected to wait. Extra check required to make sure
169 * we don't wait needlessly on the last iteration.
170 */
171 if (i - 1)
172 udelay(1);
173 }
174
175 return -EAGAIN;
176 }
177
178
etm_set_prog(struct etm_drvdata * drvdata)179 static void etm_set_prog(struct etm_drvdata *drvdata)
180 {
181 u32 etmcr;
182
183 etmcr = etm_readl(drvdata, ETMCR);
184 etmcr |= ETMCR_ETM_PRG;
185 etm_writel(drvdata, etmcr, ETMCR);
186 /*
187 * Recommended by spec for cp14 accesses to ensure etmcr write is
188 * complete before polling etmsr
189 */
190 isb();
191 if (coresight_timeout_etm(drvdata, ETMSR, ETMSR_PROG_BIT, 1)) {
192 dev_err(drvdata->dev,
193 "timeout observed when probing at offset %#x\n", ETMSR);
194 }
195 }
196
etm_clr_prog(struct etm_drvdata * drvdata)197 static void etm_clr_prog(struct etm_drvdata *drvdata)
198 {
199 u32 etmcr;
200
201 etmcr = etm_readl(drvdata, ETMCR);
202 etmcr &= ~ETMCR_ETM_PRG;
203 etm_writel(drvdata, etmcr, ETMCR);
204 /*
205 * Recommended by spec for cp14 accesses to ensure etmcr write is
206 * complete before polling etmsr
207 */
208 isb();
209 if (coresight_timeout_etm(drvdata, ETMSR, ETMSR_PROG_BIT, 0)) {
210 dev_err(drvdata->dev,
211 "timeout observed when probing at offset %#x\n", ETMSR);
212 }
213 }
214
etm_set_default(struct etm_drvdata * drvdata)215 static void etm_set_default(struct etm_drvdata *drvdata)
216 {
217 int i;
218
219 drvdata->trigger_event = ETM_DEFAULT_EVENT_VAL;
220 drvdata->enable_event = ETM_HARD_WIRE_RES_A;
221
222 drvdata->seq_12_event = ETM_DEFAULT_EVENT_VAL;
223 drvdata->seq_21_event = ETM_DEFAULT_EVENT_VAL;
224 drvdata->seq_23_event = ETM_DEFAULT_EVENT_VAL;
225 drvdata->seq_31_event = ETM_DEFAULT_EVENT_VAL;
226 drvdata->seq_32_event = ETM_DEFAULT_EVENT_VAL;
227 drvdata->seq_13_event = ETM_DEFAULT_EVENT_VAL;
228 drvdata->timestamp_event = ETM_DEFAULT_EVENT_VAL;
229
230 for (i = 0; i < drvdata->nr_cntr; i++) {
231 drvdata->cntr_rld_val[i] = 0x0;
232 drvdata->cntr_event[i] = ETM_DEFAULT_EVENT_VAL;
233 drvdata->cntr_rld_event[i] = ETM_DEFAULT_EVENT_VAL;
234 drvdata->cntr_val[i] = 0x0;
235 }
236
237 drvdata->seq_curr_state = 0x0;
238 drvdata->ctxid_idx = 0x0;
239 for (i = 0; i < drvdata->nr_ctxid_cmp; i++)
240 drvdata->ctxid_val[i] = 0x0;
241 drvdata->ctxid_mask = 0x0;
242 }
243
etm_enable_hw(void * info)244 static void etm_enable_hw(void *info)
245 {
246 int i;
247 u32 etmcr;
248 struct etm_drvdata *drvdata = info;
249
250 CS_UNLOCK(drvdata->base);
251
252 /* Turn engine on */
253 etm_clr_pwrdwn(drvdata);
254 /* Apply power to trace registers */
255 etm_set_pwrup(drvdata);
256 /* Make sure all registers are accessible */
257 etm_os_unlock(drvdata);
258
259 etm_set_prog(drvdata);
260
261 etmcr = etm_readl(drvdata, ETMCR);
262 etmcr &= (ETMCR_PWD_DWN | ETMCR_ETM_PRG);
263 etmcr |= drvdata->port_size;
264 etm_writel(drvdata, drvdata->ctrl | etmcr, ETMCR);
265 etm_writel(drvdata, drvdata->trigger_event, ETMTRIGGER);
266 etm_writel(drvdata, drvdata->startstop_ctrl, ETMTSSCR);
267 etm_writel(drvdata, drvdata->enable_event, ETMTEEVR);
268 etm_writel(drvdata, drvdata->enable_ctrl1, ETMTECR1);
269 etm_writel(drvdata, drvdata->fifofull_level, ETMFFLR);
270 for (i = 0; i < drvdata->nr_addr_cmp; i++) {
271 etm_writel(drvdata, drvdata->addr_val[i], ETMACVRn(i));
272 etm_writel(drvdata, drvdata->addr_acctype[i], ETMACTRn(i));
273 }
274 for (i = 0; i < drvdata->nr_cntr; i++) {
275 etm_writel(drvdata, drvdata->cntr_rld_val[i], ETMCNTRLDVRn(i));
276 etm_writel(drvdata, drvdata->cntr_event[i], ETMCNTENRn(i));
277 etm_writel(drvdata, drvdata->cntr_rld_event[i],
278 ETMCNTRLDEVRn(i));
279 etm_writel(drvdata, drvdata->cntr_val[i], ETMCNTVRn(i));
280 }
281 etm_writel(drvdata, drvdata->seq_12_event, ETMSQ12EVR);
282 etm_writel(drvdata, drvdata->seq_21_event, ETMSQ21EVR);
283 etm_writel(drvdata, drvdata->seq_23_event, ETMSQ23EVR);
284 etm_writel(drvdata, drvdata->seq_31_event, ETMSQ31EVR);
285 etm_writel(drvdata, drvdata->seq_32_event, ETMSQ32EVR);
286 etm_writel(drvdata, drvdata->seq_13_event, ETMSQ13EVR);
287 etm_writel(drvdata, drvdata->seq_curr_state, ETMSQR);
288 for (i = 0; i < drvdata->nr_ext_out; i++)
289 etm_writel(drvdata, ETM_DEFAULT_EVENT_VAL, ETMEXTOUTEVRn(i));
290 for (i = 0; i < drvdata->nr_ctxid_cmp; i++)
291 etm_writel(drvdata, drvdata->ctxid_val[i], ETMCIDCVRn(i));
292 etm_writel(drvdata, drvdata->ctxid_mask, ETMCIDCMR);
293 etm_writel(drvdata, drvdata->sync_freq, ETMSYNCFR);
294 /* No external input selected */
295 etm_writel(drvdata, 0x0, ETMEXTINSELR);
296 etm_writel(drvdata, drvdata->timestamp_event, ETMTSEVR);
297 /* No auxiliary control selected */
298 etm_writel(drvdata, 0x0, ETMAUXCR);
299 etm_writel(drvdata, drvdata->traceid, ETMTRACEIDR);
300 /* No VMID comparator value selected */
301 etm_writel(drvdata, 0x0, ETMVMIDCVR);
302
303 /* Ensures trace output is enabled from this ETM */
304 etm_writel(drvdata, drvdata->ctrl | ETMCR_ETM_EN | etmcr, ETMCR);
305
306 etm_clr_prog(drvdata);
307 CS_LOCK(drvdata->base);
308
309 dev_dbg(drvdata->dev, "cpu: %d enable smp call done\n", drvdata->cpu);
310 }
311
etm_trace_id_simple(struct etm_drvdata * drvdata)312 static int etm_trace_id_simple(struct etm_drvdata *drvdata)
313 {
314 if (!drvdata->enable)
315 return drvdata->traceid;
316
317 return (etm_readl(drvdata, ETMTRACEIDR) & ETM_TRACEID_MASK);
318 }
319
etm_trace_id(struct coresight_device * csdev)320 static int etm_trace_id(struct coresight_device *csdev)
321 {
322 struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
323 unsigned long flags;
324 int trace_id = -1;
325
326 if (!drvdata->enable)
327 return drvdata->traceid;
328
329 if (clk_prepare_enable(drvdata->clk))
330 goto out;
331
332 spin_lock_irqsave(&drvdata->spinlock, flags);
333
334 CS_UNLOCK(drvdata->base);
335 trace_id = (etm_readl(drvdata, ETMTRACEIDR) & ETM_TRACEID_MASK);
336 CS_LOCK(drvdata->base);
337
338 spin_unlock_irqrestore(&drvdata->spinlock, flags);
339 clk_disable_unprepare(drvdata->clk);
340 out:
341 return trace_id;
342 }
343
etm_enable(struct coresight_device * csdev)344 static int etm_enable(struct coresight_device *csdev)
345 {
346 struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
347 int ret;
348
349 ret = clk_prepare_enable(drvdata->clk);
350 if (ret)
351 goto err_clk;
352
353 spin_lock(&drvdata->spinlock);
354
355 /*
356 * Configure the ETM only if the CPU is online. If it isn't online
357 * hw configuration will take place when 'CPU_STARTING' is received
358 * in @etm_cpu_callback.
359 */
360 if (cpu_online(drvdata->cpu)) {
361 ret = smp_call_function_single(drvdata->cpu,
362 etm_enable_hw, drvdata, 1);
363 if (ret)
364 goto err;
365 }
366
367 drvdata->enable = true;
368 drvdata->sticky_enable = true;
369
370 spin_unlock(&drvdata->spinlock);
371
372 dev_info(drvdata->dev, "ETM tracing enabled\n");
373 return 0;
374 err:
375 spin_unlock(&drvdata->spinlock);
376 clk_disable_unprepare(drvdata->clk);
377 err_clk:
378 return ret;
379 }
380
etm_disable_hw(void * info)381 static void etm_disable_hw(void *info)
382 {
383 int i;
384 struct etm_drvdata *drvdata = info;
385
386 CS_UNLOCK(drvdata->base);
387 etm_set_prog(drvdata);
388
389 /* Program trace enable to low by using always false event */
390 etm_writel(drvdata, ETM_HARD_WIRE_RES_A | ETM_EVENT_NOT_A, ETMTEEVR);
391
392 /* Read back sequencer and counters for post trace analysis */
393 drvdata->seq_curr_state = (etm_readl(drvdata, ETMSQR) & ETM_SQR_MASK);
394
395 for (i = 0; i < drvdata->nr_cntr; i++)
396 drvdata->cntr_val[i] = etm_readl(drvdata, ETMCNTVRn(i));
397
398 etm_set_pwrdwn(drvdata);
399 CS_LOCK(drvdata->base);
400
401 dev_dbg(drvdata->dev, "cpu: %d disable smp call done\n", drvdata->cpu);
402 }
403
etm_disable(struct coresight_device * csdev)404 static void etm_disable(struct coresight_device *csdev)
405 {
406 struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
407
408 /*
409 * Taking hotplug lock here protects from clocks getting disabled
410 * with tracing being left on (crash scenario) if user disable occurs
411 * after cpu online mask indicates the cpu is offline but before the
412 * DYING hotplug callback is serviced by the ETM driver.
413 */
414 get_online_cpus();
415 spin_lock(&drvdata->spinlock);
416
417 /*
418 * Executing etm_disable_hw on the cpu whose ETM is being disabled
419 * ensures that register writes occur when cpu is powered.
420 */
421 smp_call_function_single(drvdata->cpu, etm_disable_hw, drvdata, 1);
422 drvdata->enable = false;
423
424 spin_unlock(&drvdata->spinlock);
425 put_online_cpus();
426
427 clk_disable_unprepare(drvdata->clk);
428
429 dev_info(drvdata->dev, "ETM tracing disabled\n");
430 }
431
432 static const struct coresight_ops_source etm_source_ops = {
433 .trace_id = etm_trace_id,
434 .enable = etm_enable,
435 .disable = etm_disable,
436 };
437
438 static const struct coresight_ops etm_cs_ops = {
439 .source_ops = &etm_source_ops,
440 };
441
nr_addr_cmp_show(struct device * dev,struct device_attribute * attr,char * buf)442 static ssize_t nr_addr_cmp_show(struct device *dev,
443 struct device_attribute *attr, char *buf)
444 {
445 unsigned long val;
446 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
447
448 val = drvdata->nr_addr_cmp;
449 return sprintf(buf, "%#lx\n", val);
450 }
451 static DEVICE_ATTR_RO(nr_addr_cmp);
452
nr_cntr_show(struct device * dev,struct device_attribute * attr,char * buf)453 static ssize_t nr_cntr_show(struct device *dev,
454 struct device_attribute *attr, char *buf)
455 { unsigned long val;
456 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
457
458 val = drvdata->nr_cntr;
459 return sprintf(buf, "%#lx\n", val);
460 }
461 static DEVICE_ATTR_RO(nr_cntr);
462
nr_ctxid_cmp_show(struct device * dev,struct device_attribute * attr,char * buf)463 static ssize_t nr_ctxid_cmp_show(struct device *dev,
464 struct device_attribute *attr, char *buf)
465 {
466 unsigned long val;
467 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
468
469 val = drvdata->nr_ctxid_cmp;
470 return sprintf(buf, "%#lx\n", val);
471 }
472 static DEVICE_ATTR_RO(nr_ctxid_cmp);
473
etmsr_show(struct device * dev,struct device_attribute * attr,char * buf)474 static ssize_t etmsr_show(struct device *dev,
475 struct device_attribute *attr, char *buf)
476 {
477 int ret;
478 unsigned long flags, val;
479 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
480
481 ret = clk_prepare_enable(drvdata->clk);
482 if (ret)
483 return ret;
484
485 spin_lock_irqsave(&drvdata->spinlock, flags);
486 CS_UNLOCK(drvdata->base);
487
488 val = etm_readl(drvdata, ETMSR);
489
490 CS_LOCK(drvdata->base);
491 spin_unlock_irqrestore(&drvdata->spinlock, flags);
492 clk_disable_unprepare(drvdata->clk);
493
494 return sprintf(buf, "%#lx\n", val);
495 }
496 static DEVICE_ATTR_RO(etmsr);
497
reset_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)498 static ssize_t reset_store(struct device *dev,
499 struct device_attribute *attr,
500 const char *buf, size_t size)
501 {
502 int i, ret;
503 unsigned long val;
504 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
505
506 ret = kstrtoul(buf, 16, &val);
507 if (ret)
508 return ret;
509
510 if (val) {
511 spin_lock(&drvdata->spinlock);
512 drvdata->mode = ETM_MODE_EXCLUDE;
513 drvdata->ctrl = 0x0;
514 drvdata->trigger_event = ETM_DEFAULT_EVENT_VAL;
515 drvdata->startstop_ctrl = 0x0;
516 drvdata->addr_idx = 0x0;
517 for (i = 0; i < drvdata->nr_addr_cmp; i++) {
518 drvdata->addr_val[i] = 0x0;
519 drvdata->addr_acctype[i] = 0x0;
520 drvdata->addr_type[i] = ETM_ADDR_TYPE_NONE;
521 }
522 drvdata->cntr_idx = 0x0;
523
524 etm_set_default(drvdata);
525 spin_unlock(&drvdata->spinlock);
526 }
527
528 return size;
529 }
530 static DEVICE_ATTR_WO(reset);
531
mode_show(struct device * dev,struct device_attribute * attr,char * buf)532 static ssize_t mode_show(struct device *dev,
533 struct device_attribute *attr, char *buf)
534 {
535 unsigned long val;
536 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
537
538 val = drvdata->mode;
539 return sprintf(buf, "%#lx\n", val);
540 }
541
mode_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)542 static ssize_t mode_store(struct device *dev,
543 struct device_attribute *attr,
544 const char *buf, size_t size)
545 {
546 int ret;
547 unsigned long val;
548 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
549
550 ret = kstrtoul(buf, 16, &val);
551 if (ret)
552 return ret;
553
554 spin_lock(&drvdata->spinlock);
555 drvdata->mode = val & ETM_MODE_ALL;
556
557 if (drvdata->mode & ETM_MODE_EXCLUDE)
558 drvdata->enable_ctrl1 |= ETMTECR1_INC_EXC;
559 else
560 drvdata->enable_ctrl1 &= ~ETMTECR1_INC_EXC;
561
562 if (drvdata->mode & ETM_MODE_CYCACC)
563 drvdata->ctrl |= ETMCR_CYC_ACC;
564 else
565 drvdata->ctrl &= ~ETMCR_CYC_ACC;
566
567 if (drvdata->mode & ETM_MODE_STALL) {
568 if (!(drvdata->etmccr & ETMCCR_FIFOFULL)) {
569 dev_warn(drvdata->dev, "stall mode not supported\n");
570 ret = -EINVAL;
571 goto err_unlock;
572 }
573 drvdata->ctrl |= ETMCR_STALL_MODE;
574 } else
575 drvdata->ctrl &= ~ETMCR_STALL_MODE;
576
577 if (drvdata->mode & ETM_MODE_TIMESTAMP) {
578 if (!(drvdata->etmccer & ETMCCER_TIMESTAMP)) {
579 dev_warn(drvdata->dev, "timestamp not supported\n");
580 ret = -EINVAL;
581 goto err_unlock;
582 }
583 drvdata->ctrl |= ETMCR_TIMESTAMP_EN;
584 } else
585 drvdata->ctrl &= ~ETMCR_TIMESTAMP_EN;
586
587 if (drvdata->mode & ETM_MODE_CTXID)
588 drvdata->ctrl |= ETMCR_CTXID_SIZE;
589 else
590 drvdata->ctrl &= ~ETMCR_CTXID_SIZE;
591 spin_unlock(&drvdata->spinlock);
592
593 return size;
594
595 err_unlock:
596 spin_unlock(&drvdata->spinlock);
597 return ret;
598 }
599 static DEVICE_ATTR_RW(mode);
600
trigger_event_show(struct device * dev,struct device_attribute * attr,char * buf)601 static ssize_t trigger_event_show(struct device *dev,
602 struct device_attribute *attr, char *buf)
603 {
604 unsigned long val;
605 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
606
607 val = drvdata->trigger_event;
608 return sprintf(buf, "%#lx\n", val);
609 }
610
trigger_event_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)611 static ssize_t trigger_event_store(struct device *dev,
612 struct device_attribute *attr,
613 const char *buf, size_t size)
614 {
615 int ret;
616 unsigned long val;
617 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
618
619 ret = kstrtoul(buf, 16, &val);
620 if (ret)
621 return ret;
622
623 drvdata->trigger_event = val & ETM_EVENT_MASK;
624
625 return size;
626 }
627 static DEVICE_ATTR_RW(trigger_event);
628
enable_event_show(struct device * dev,struct device_attribute * attr,char * buf)629 static ssize_t enable_event_show(struct device *dev,
630 struct device_attribute *attr, char *buf)
631 {
632 unsigned long val;
633 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
634
635 val = drvdata->enable_event;
636 return sprintf(buf, "%#lx\n", val);
637 }
638
enable_event_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)639 static ssize_t enable_event_store(struct device *dev,
640 struct device_attribute *attr,
641 const char *buf, size_t size)
642 {
643 int ret;
644 unsigned long val;
645 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
646
647 ret = kstrtoul(buf, 16, &val);
648 if (ret)
649 return ret;
650
651 drvdata->enable_event = val & ETM_EVENT_MASK;
652
653 return size;
654 }
655 static DEVICE_ATTR_RW(enable_event);
656
fifofull_level_show(struct device * dev,struct device_attribute * attr,char * buf)657 static ssize_t fifofull_level_show(struct device *dev,
658 struct device_attribute *attr, char *buf)
659 {
660 unsigned long val;
661 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
662
663 val = drvdata->fifofull_level;
664 return sprintf(buf, "%#lx\n", val);
665 }
666
fifofull_level_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)667 static ssize_t fifofull_level_store(struct device *dev,
668 struct device_attribute *attr,
669 const char *buf, size_t size)
670 {
671 int ret;
672 unsigned long val;
673 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
674
675 ret = kstrtoul(buf, 16, &val);
676 if (ret)
677 return ret;
678
679 drvdata->fifofull_level = val;
680
681 return size;
682 }
683 static DEVICE_ATTR_RW(fifofull_level);
684
addr_idx_show(struct device * dev,struct device_attribute * attr,char * buf)685 static ssize_t addr_idx_show(struct device *dev,
686 struct device_attribute *attr, char *buf)
687 {
688 unsigned long val;
689 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
690
691 val = drvdata->addr_idx;
692 return sprintf(buf, "%#lx\n", val);
693 }
694
addr_idx_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)695 static ssize_t addr_idx_store(struct device *dev,
696 struct device_attribute *attr,
697 const char *buf, size_t size)
698 {
699 int ret;
700 unsigned long val;
701 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
702
703 ret = kstrtoul(buf, 16, &val);
704 if (ret)
705 return ret;
706
707 if (val >= drvdata->nr_addr_cmp)
708 return -EINVAL;
709
710 /*
711 * Use spinlock to ensure index doesn't change while it gets
712 * dereferenced multiple times within a spinlock block elsewhere.
713 */
714 spin_lock(&drvdata->spinlock);
715 drvdata->addr_idx = val;
716 spin_unlock(&drvdata->spinlock);
717
718 return size;
719 }
720 static DEVICE_ATTR_RW(addr_idx);
721
addr_single_show(struct device * dev,struct device_attribute * attr,char * buf)722 static ssize_t addr_single_show(struct device *dev,
723 struct device_attribute *attr, char *buf)
724 {
725 u8 idx;
726 unsigned long val;
727 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
728
729 spin_lock(&drvdata->spinlock);
730 idx = drvdata->addr_idx;
731 if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
732 drvdata->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) {
733 spin_unlock(&drvdata->spinlock);
734 return -EINVAL;
735 }
736
737 val = drvdata->addr_val[idx];
738 spin_unlock(&drvdata->spinlock);
739
740 return sprintf(buf, "%#lx\n", val);
741 }
742
addr_single_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)743 static ssize_t addr_single_store(struct device *dev,
744 struct device_attribute *attr,
745 const char *buf, size_t size)
746 {
747 u8 idx;
748 int ret;
749 unsigned long val;
750 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
751
752 ret = kstrtoul(buf, 16, &val);
753 if (ret)
754 return ret;
755
756 spin_lock(&drvdata->spinlock);
757 idx = drvdata->addr_idx;
758 if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
759 drvdata->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) {
760 spin_unlock(&drvdata->spinlock);
761 return -EINVAL;
762 }
763
764 drvdata->addr_val[idx] = val;
765 drvdata->addr_type[idx] = ETM_ADDR_TYPE_SINGLE;
766 spin_unlock(&drvdata->spinlock);
767
768 return size;
769 }
770 static DEVICE_ATTR_RW(addr_single);
771
addr_range_show(struct device * dev,struct device_attribute * attr,char * buf)772 static ssize_t addr_range_show(struct device *dev,
773 struct device_attribute *attr, char *buf)
774 {
775 u8 idx;
776 unsigned long val1, val2;
777 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
778
779 spin_lock(&drvdata->spinlock);
780 idx = drvdata->addr_idx;
781 if (idx % 2 != 0) {
782 spin_unlock(&drvdata->spinlock);
783 return -EPERM;
784 }
785 if (!((drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE &&
786 drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) ||
787 (drvdata->addr_type[idx] == ETM_ADDR_TYPE_RANGE &&
788 drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) {
789 spin_unlock(&drvdata->spinlock);
790 return -EPERM;
791 }
792
793 val1 = drvdata->addr_val[idx];
794 val2 = drvdata->addr_val[idx + 1];
795 spin_unlock(&drvdata->spinlock);
796
797 return sprintf(buf, "%#lx %#lx\n", val1, val2);
798 }
799
addr_range_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)800 static ssize_t addr_range_store(struct device *dev,
801 struct device_attribute *attr,
802 const char *buf, size_t size)
803 {
804 u8 idx;
805 unsigned long val1, val2;
806 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
807
808 if (sscanf(buf, "%lx %lx", &val1, &val2) != 2)
809 return -EINVAL;
810 /* Lower address comparator cannot have a higher address value */
811 if (val1 > val2)
812 return -EINVAL;
813
814 spin_lock(&drvdata->spinlock);
815 idx = drvdata->addr_idx;
816 if (idx % 2 != 0) {
817 spin_unlock(&drvdata->spinlock);
818 return -EPERM;
819 }
820 if (!((drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE &&
821 drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) ||
822 (drvdata->addr_type[idx] == ETM_ADDR_TYPE_RANGE &&
823 drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) {
824 spin_unlock(&drvdata->spinlock);
825 return -EPERM;
826 }
827
828 drvdata->addr_val[idx] = val1;
829 drvdata->addr_type[idx] = ETM_ADDR_TYPE_RANGE;
830 drvdata->addr_val[idx + 1] = val2;
831 drvdata->addr_type[idx + 1] = ETM_ADDR_TYPE_RANGE;
832 drvdata->enable_ctrl1 |= (1 << (idx/2));
833 spin_unlock(&drvdata->spinlock);
834
835 return size;
836 }
837 static DEVICE_ATTR_RW(addr_range);
838
addr_start_show(struct device * dev,struct device_attribute * attr,char * buf)839 static ssize_t addr_start_show(struct device *dev,
840 struct device_attribute *attr, char *buf)
841 {
842 u8 idx;
843 unsigned long val;
844 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
845
846 spin_lock(&drvdata->spinlock);
847 idx = drvdata->addr_idx;
848 if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
849 drvdata->addr_type[idx] == ETM_ADDR_TYPE_START)) {
850 spin_unlock(&drvdata->spinlock);
851 return -EPERM;
852 }
853
854 val = drvdata->addr_val[idx];
855 spin_unlock(&drvdata->spinlock);
856
857 return sprintf(buf, "%#lx\n", val);
858 }
859
addr_start_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)860 static ssize_t addr_start_store(struct device *dev,
861 struct device_attribute *attr,
862 const char *buf, size_t size)
863 {
864 u8 idx;
865 int ret;
866 unsigned long val;
867 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
868
869 ret = kstrtoul(buf, 16, &val);
870 if (ret)
871 return ret;
872
873 spin_lock(&drvdata->spinlock);
874 idx = drvdata->addr_idx;
875 if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
876 drvdata->addr_type[idx] == ETM_ADDR_TYPE_START)) {
877 spin_unlock(&drvdata->spinlock);
878 return -EPERM;
879 }
880
881 drvdata->addr_val[idx] = val;
882 drvdata->addr_type[idx] = ETM_ADDR_TYPE_START;
883 drvdata->startstop_ctrl |= (1 << idx);
884 drvdata->enable_ctrl1 |= BIT(25);
885 spin_unlock(&drvdata->spinlock);
886
887 return size;
888 }
889 static DEVICE_ATTR_RW(addr_start);
890
addr_stop_show(struct device * dev,struct device_attribute * attr,char * buf)891 static ssize_t addr_stop_show(struct device *dev,
892 struct device_attribute *attr, char *buf)
893 {
894 u8 idx;
895 unsigned long val;
896 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
897
898 spin_lock(&drvdata->spinlock);
899 idx = drvdata->addr_idx;
900 if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
901 drvdata->addr_type[idx] == ETM_ADDR_TYPE_STOP)) {
902 spin_unlock(&drvdata->spinlock);
903 return -EPERM;
904 }
905
906 val = drvdata->addr_val[idx];
907 spin_unlock(&drvdata->spinlock);
908
909 return sprintf(buf, "%#lx\n", val);
910 }
911
addr_stop_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)912 static ssize_t addr_stop_store(struct device *dev,
913 struct device_attribute *attr,
914 const char *buf, size_t size)
915 {
916 u8 idx;
917 int ret;
918 unsigned long val;
919 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
920
921 ret = kstrtoul(buf, 16, &val);
922 if (ret)
923 return ret;
924
925 spin_lock(&drvdata->spinlock);
926 idx = drvdata->addr_idx;
927 if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
928 drvdata->addr_type[idx] == ETM_ADDR_TYPE_STOP)) {
929 spin_unlock(&drvdata->spinlock);
930 return -EPERM;
931 }
932
933 drvdata->addr_val[idx] = val;
934 drvdata->addr_type[idx] = ETM_ADDR_TYPE_STOP;
935 drvdata->startstop_ctrl |= (1 << (idx + 16));
936 drvdata->enable_ctrl1 |= ETMTECR1_START_STOP;
937 spin_unlock(&drvdata->spinlock);
938
939 return size;
940 }
941 static DEVICE_ATTR_RW(addr_stop);
942
addr_acctype_show(struct device * dev,struct device_attribute * attr,char * buf)943 static ssize_t addr_acctype_show(struct device *dev,
944 struct device_attribute *attr, char *buf)
945 {
946 unsigned long val;
947 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
948
949 spin_lock(&drvdata->spinlock);
950 val = drvdata->addr_acctype[drvdata->addr_idx];
951 spin_unlock(&drvdata->spinlock);
952
953 return sprintf(buf, "%#lx\n", val);
954 }
955
addr_acctype_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)956 static ssize_t addr_acctype_store(struct device *dev,
957 struct device_attribute *attr,
958 const char *buf, size_t size)
959 {
960 int ret;
961 unsigned long val;
962 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
963
964 ret = kstrtoul(buf, 16, &val);
965 if (ret)
966 return ret;
967
968 spin_lock(&drvdata->spinlock);
969 drvdata->addr_acctype[drvdata->addr_idx] = val;
970 spin_unlock(&drvdata->spinlock);
971
972 return size;
973 }
974 static DEVICE_ATTR_RW(addr_acctype);
975
cntr_idx_show(struct device * dev,struct device_attribute * attr,char * buf)976 static ssize_t cntr_idx_show(struct device *dev,
977 struct device_attribute *attr, char *buf)
978 {
979 unsigned long val;
980 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
981
982 val = drvdata->cntr_idx;
983 return sprintf(buf, "%#lx\n", val);
984 }
985
cntr_idx_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)986 static ssize_t cntr_idx_store(struct device *dev,
987 struct device_attribute *attr,
988 const char *buf, size_t size)
989 {
990 int ret;
991 unsigned long val;
992 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
993
994 ret = kstrtoul(buf, 16, &val);
995 if (ret)
996 return ret;
997
998 if (val >= drvdata->nr_cntr)
999 return -EINVAL;
1000 /*
1001 * Use spinlock to ensure index doesn't change while it gets
1002 * dereferenced multiple times within a spinlock block elsewhere.
1003 */
1004 spin_lock(&drvdata->spinlock);
1005 drvdata->cntr_idx = val;
1006 spin_unlock(&drvdata->spinlock);
1007
1008 return size;
1009 }
1010 static DEVICE_ATTR_RW(cntr_idx);
1011
cntr_rld_val_show(struct device * dev,struct device_attribute * attr,char * buf)1012 static ssize_t cntr_rld_val_show(struct device *dev,
1013 struct device_attribute *attr, char *buf)
1014 {
1015 unsigned long val;
1016 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1017
1018 spin_lock(&drvdata->spinlock);
1019 val = drvdata->cntr_rld_val[drvdata->cntr_idx];
1020 spin_unlock(&drvdata->spinlock);
1021
1022 return sprintf(buf, "%#lx\n", val);
1023 }
1024
cntr_rld_val_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1025 static ssize_t cntr_rld_val_store(struct device *dev,
1026 struct device_attribute *attr,
1027 const char *buf, size_t size)
1028 {
1029 int ret;
1030 unsigned long val;
1031 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1032
1033 ret = kstrtoul(buf, 16, &val);
1034 if (ret)
1035 return ret;
1036
1037 spin_lock(&drvdata->spinlock);
1038 drvdata->cntr_rld_val[drvdata->cntr_idx] = val;
1039 spin_unlock(&drvdata->spinlock);
1040
1041 return size;
1042 }
1043 static DEVICE_ATTR_RW(cntr_rld_val);
1044
cntr_event_show(struct device * dev,struct device_attribute * attr,char * buf)1045 static ssize_t cntr_event_show(struct device *dev,
1046 struct device_attribute *attr, char *buf)
1047 {
1048 unsigned long val;
1049 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1050
1051 spin_lock(&drvdata->spinlock);
1052 val = drvdata->cntr_event[drvdata->cntr_idx];
1053 spin_unlock(&drvdata->spinlock);
1054
1055 return sprintf(buf, "%#lx\n", val);
1056 }
1057
cntr_event_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1058 static ssize_t cntr_event_store(struct device *dev,
1059 struct device_attribute *attr,
1060 const char *buf, size_t size)
1061 {
1062 int ret;
1063 unsigned long val;
1064 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1065
1066 ret = kstrtoul(buf, 16, &val);
1067 if (ret)
1068 return ret;
1069
1070 spin_lock(&drvdata->spinlock);
1071 drvdata->cntr_event[drvdata->cntr_idx] = val & ETM_EVENT_MASK;
1072 spin_unlock(&drvdata->spinlock);
1073
1074 return size;
1075 }
1076 static DEVICE_ATTR_RW(cntr_event);
1077
cntr_rld_event_show(struct device * dev,struct device_attribute * attr,char * buf)1078 static ssize_t cntr_rld_event_show(struct device *dev,
1079 struct device_attribute *attr, char *buf)
1080 {
1081 unsigned long val;
1082 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1083
1084 spin_lock(&drvdata->spinlock);
1085 val = drvdata->cntr_rld_event[drvdata->cntr_idx];
1086 spin_unlock(&drvdata->spinlock);
1087
1088 return sprintf(buf, "%#lx\n", val);
1089 }
1090
cntr_rld_event_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1091 static ssize_t cntr_rld_event_store(struct device *dev,
1092 struct device_attribute *attr,
1093 const char *buf, size_t size)
1094 {
1095 int ret;
1096 unsigned long val;
1097 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1098
1099 ret = kstrtoul(buf, 16, &val);
1100 if (ret)
1101 return ret;
1102
1103 spin_lock(&drvdata->spinlock);
1104 drvdata->cntr_rld_event[drvdata->cntr_idx] = val & ETM_EVENT_MASK;
1105 spin_unlock(&drvdata->spinlock);
1106
1107 return size;
1108 }
1109 static DEVICE_ATTR_RW(cntr_rld_event);
1110
cntr_val_show(struct device * dev,struct device_attribute * attr,char * buf)1111 static ssize_t cntr_val_show(struct device *dev,
1112 struct device_attribute *attr, char *buf)
1113 {
1114 int i, ret = 0;
1115 u32 val;
1116 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1117
1118 if (!drvdata->enable) {
1119 spin_lock(&drvdata->spinlock);
1120 for (i = 0; i < drvdata->nr_cntr; i++)
1121 ret += sprintf(buf, "counter %d: %x\n",
1122 i, drvdata->cntr_val[i]);
1123 spin_unlock(&drvdata->spinlock);
1124 return ret;
1125 }
1126
1127 for (i = 0; i < drvdata->nr_cntr; i++) {
1128 val = etm_readl(drvdata, ETMCNTVRn(i));
1129 ret += sprintf(buf, "counter %d: %x\n", i, val);
1130 }
1131
1132 return ret;
1133 }
1134
cntr_val_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1135 static ssize_t cntr_val_store(struct device *dev,
1136 struct device_attribute *attr,
1137 const char *buf, size_t size)
1138 {
1139 int ret;
1140 unsigned long val;
1141 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1142
1143 ret = kstrtoul(buf, 16, &val);
1144 if (ret)
1145 return ret;
1146
1147 spin_lock(&drvdata->spinlock);
1148 drvdata->cntr_val[drvdata->cntr_idx] = val;
1149 spin_unlock(&drvdata->spinlock);
1150
1151 return size;
1152 }
1153 static DEVICE_ATTR_RW(cntr_val);
1154
seq_12_event_show(struct device * dev,struct device_attribute * attr,char * buf)1155 static ssize_t seq_12_event_show(struct device *dev,
1156 struct device_attribute *attr, char *buf)
1157 {
1158 unsigned long val;
1159 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1160
1161 val = drvdata->seq_12_event;
1162 return sprintf(buf, "%#lx\n", val);
1163 }
1164
seq_12_event_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1165 static ssize_t seq_12_event_store(struct device *dev,
1166 struct device_attribute *attr,
1167 const char *buf, size_t size)
1168 {
1169 int ret;
1170 unsigned long val;
1171 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1172
1173 ret = kstrtoul(buf, 16, &val);
1174 if (ret)
1175 return ret;
1176
1177 drvdata->seq_12_event = val & ETM_EVENT_MASK;
1178 return size;
1179 }
1180 static DEVICE_ATTR_RW(seq_12_event);
1181
seq_21_event_show(struct device * dev,struct device_attribute * attr,char * buf)1182 static ssize_t seq_21_event_show(struct device *dev,
1183 struct device_attribute *attr, char *buf)
1184 {
1185 unsigned long val;
1186 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1187
1188 val = drvdata->seq_21_event;
1189 return sprintf(buf, "%#lx\n", val);
1190 }
1191
seq_21_event_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1192 static ssize_t seq_21_event_store(struct device *dev,
1193 struct device_attribute *attr,
1194 const char *buf, size_t size)
1195 {
1196 int ret;
1197 unsigned long val;
1198 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1199
1200 ret = kstrtoul(buf, 16, &val);
1201 if (ret)
1202 return ret;
1203
1204 drvdata->seq_21_event = val & ETM_EVENT_MASK;
1205 return size;
1206 }
1207 static DEVICE_ATTR_RW(seq_21_event);
1208
seq_23_event_show(struct device * dev,struct device_attribute * attr,char * buf)1209 static ssize_t seq_23_event_show(struct device *dev,
1210 struct device_attribute *attr, char *buf)
1211 {
1212 unsigned long val;
1213 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1214
1215 val = drvdata->seq_23_event;
1216 return sprintf(buf, "%#lx\n", val);
1217 }
1218
seq_23_event_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1219 static ssize_t seq_23_event_store(struct device *dev,
1220 struct device_attribute *attr,
1221 const char *buf, size_t size)
1222 {
1223 int ret;
1224 unsigned long val;
1225 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1226
1227 ret = kstrtoul(buf, 16, &val);
1228 if (ret)
1229 return ret;
1230
1231 drvdata->seq_23_event = val & ETM_EVENT_MASK;
1232 return size;
1233 }
1234 static DEVICE_ATTR_RW(seq_23_event);
1235
seq_31_event_show(struct device * dev,struct device_attribute * attr,char * buf)1236 static ssize_t seq_31_event_show(struct device *dev,
1237 struct device_attribute *attr, char *buf)
1238 {
1239 unsigned long val;
1240 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1241
1242 val = drvdata->seq_31_event;
1243 return sprintf(buf, "%#lx\n", val);
1244 }
1245
seq_31_event_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1246 static ssize_t seq_31_event_store(struct device *dev,
1247 struct device_attribute *attr,
1248 const char *buf, size_t size)
1249 {
1250 int ret;
1251 unsigned long val;
1252 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1253
1254 ret = kstrtoul(buf, 16, &val);
1255 if (ret)
1256 return ret;
1257
1258 drvdata->seq_31_event = val & ETM_EVENT_MASK;
1259 return size;
1260 }
1261 static DEVICE_ATTR_RW(seq_31_event);
1262
seq_32_event_show(struct device * dev,struct device_attribute * attr,char * buf)1263 static ssize_t seq_32_event_show(struct device *dev,
1264 struct device_attribute *attr, char *buf)
1265 {
1266 unsigned long val;
1267 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1268
1269 val = drvdata->seq_32_event;
1270 return sprintf(buf, "%#lx\n", val);
1271 }
1272
seq_32_event_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1273 static ssize_t seq_32_event_store(struct device *dev,
1274 struct device_attribute *attr,
1275 const char *buf, size_t size)
1276 {
1277 int ret;
1278 unsigned long val;
1279 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1280
1281 ret = kstrtoul(buf, 16, &val);
1282 if (ret)
1283 return ret;
1284
1285 drvdata->seq_32_event = val & ETM_EVENT_MASK;
1286 return size;
1287 }
1288 static DEVICE_ATTR_RW(seq_32_event);
1289
seq_13_event_show(struct device * dev,struct device_attribute * attr,char * buf)1290 static ssize_t seq_13_event_show(struct device *dev,
1291 struct device_attribute *attr, char *buf)
1292 {
1293 unsigned long val;
1294 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1295
1296 val = drvdata->seq_13_event;
1297 return sprintf(buf, "%#lx\n", val);
1298 }
1299
seq_13_event_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1300 static ssize_t seq_13_event_store(struct device *dev,
1301 struct device_attribute *attr,
1302 const char *buf, size_t size)
1303 {
1304 int ret;
1305 unsigned long val;
1306 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1307
1308 ret = kstrtoul(buf, 16, &val);
1309 if (ret)
1310 return ret;
1311
1312 drvdata->seq_13_event = val & ETM_EVENT_MASK;
1313 return size;
1314 }
1315 static DEVICE_ATTR_RW(seq_13_event);
1316
seq_curr_state_show(struct device * dev,struct device_attribute * attr,char * buf)1317 static ssize_t seq_curr_state_show(struct device *dev,
1318 struct device_attribute *attr, char *buf)
1319 {
1320 int ret;
1321 unsigned long val, flags;
1322 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1323
1324 if (!drvdata->enable) {
1325 val = drvdata->seq_curr_state;
1326 goto out;
1327 }
1328
1329 ret = clk_prepare_enable(drvdata->clk);
1330 if (ret)
1331 return ret;
1332
1333 spin_lock_irqsave(&drvdata->spinlock, flags);
1334
1335 CS_UNLOCK(drvdata->base);
1336 val = (etm_readl(drvdata, ETMSQR) & ETM_SQR_MASK);
1337 CS_LOCK(drvdata->base);
1338
1339 spin_unlock_irqrestore(&drvdata->spinlock, flags);
1340 clk_disable_unprepare(drvdata->clk);
1341 out:
1342 return sprintf(buf, "%#lx\n", val);
1343 }
1344
seq_curr_state_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1345 static ssize_t seq_curr_state_store(struct device *dev,
1346 struct device_attribute *attr,
1347 const char *buf, size_t size)
1348 {
1349 int ret;
1350 unsigned long val;
1351 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1352
1353 ret = kstrtoul(buf, 16, &val);
1354 if (ret)
1355 return ret;
1356
1357 if (val > ETM_SEQ_STATE_MAX_VAL)
1358 return -EINVAL;
1359
1360 drvdata->seq_curr_state = val;
1361
1362 return size;
1363 }
1364 static DEVICE_ATTR_RW(seq_curr_state);
1365
ctxid_idx_show(struct device * dev,struct device_attribute * attr,char * buf)1366 static ssize_t ctxid_idx_show(struct device *dev,
1367 struct device_attribute *attr, char *buf)
1368 {
1369 unsigned long val;
1370 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1371
1372 val = drvdata->ctxid_idx;
1373 return sprintf(buf, "%#lx\n", val);
1374 }
1375
ctxid_idx_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1376 static ssize_t ctxid_idx_store(struct device *dev,
1377 struct device_attribute *attr,
1378 const char *buf, size_t size)
1379 {
1380 int ret;
1381 unsigned long val;
1382 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1383
1384 ret = kstrtoul(buf, 16, &val);
1385 if (ret)
1386 return ret;
1387
1388 if (val >= drvdata->nr_ctxid_cmp)
1389 return -EINVAL;
1390
1391 /*
1392 * Use spinlock to ensure index doesn't change while it gets
1393 * dereferenced multiple times within a spinlock block elsewhere.
1394 */
1395 spin_lock(&drvdata->spinlock);
1396 drvdata->ctxid_idx = val;
1397 spin_unlock(&drvdata->spinlock);
1398
1399 return size;
1400 }
1401 static DEVICE_ATTR_RW(ctxid_idx);
1402
ctxid_val_show(struct device * dev,struct device_attribute * attr,char * buf)1403 static ssize_t ctxid_val_show(struct device *dev,
1404 struct device_attribute *attr, char *buf)
1405 {
1406 unsigned long val;
1407 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1408
1409 spin_lock(&drvdata->spinlock);
1410 val = drvdata->ctxid_val[drvdata->ctxid_idx];
1411 spin_unlock(&drvdata->spinlock);
1412
1413 return sprintf(buf, "%#lx\n", val);
1414 }
1415
ctxid_val_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1416 static ssize_t ctxid_val_store(struct device *dev,
1417 struct device_attribute *attr,
1418 const char *buf, size_t size)
1419 {
1420 int ret;
1421 unsigned long val;
1422 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1423
1424 ret = kstrtoul(buf, 16, &val);
1425 if (ret)
1426 return ret;
1427
1428 spin_lock(&drvdata->spinlock);
1429 drvdata->ctxid_val[drvdata->ctxid_idx] = val;
1430 spin_unlock(&drvdata->spinlock);
1431
1432 return size;
1433 }
1434 static DEVICE_ATTR_RW(ctxid_val);
1435
ctxid_mask_show(struct device * dev,struct device_attribute * attr,char * buf)1436 static ssize_t ctxid_mask_show(struct device *dev,
1437 struct device_attribute *attr, char *buf)
1438 {
1439 unsigned long val;
1440 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1441
1442 val = drvdata->ctxid_mask;
1443 return sprintf(buf, "%#lx\n", val);
1444 }
1445
ctxid_mask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1446 static ssize_t ctxid_mask_store(struct device *dev,
1447 struct device_attribute *attr,
1448 const char *buf, size_t size)
1449 {
1450 int ret;
1451 unsigned long val;
1452 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1453
1454 ret = kstrtoul(buf, 16, &val);
1455 if (ret)
1456 return ret;
1457
1458 drvdata->ctxid_mask = val;
1459 return size;
1460 }
1461 static DEVICE_ATTR_RW(ctxid_mask);
1462
sync_freq_show(struct device * dev,struct device_attribute * attr,char * buf)1463 static ssize_t sync_freq_show(struct device *dev,
1464 struct device_attribute *attr, char *buf)
1465 {
1466 unsigned long val;
1467 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1468
1469 val = drvdata->sync_freq;
1470 return sprintf(buf, "%#lx\n", val);
1471 }
1472
sync_freq_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1473 static ssize_t sync_freq_store(struct device *dev,
1474 struct device_attribute *attr,
1475 const char *buf, size_t size)
1476 {
1477 int ret;
1478 unsigned long val;
1479 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1480
1481 ret = kstrtoul(buf, 16, &val);
1482 if (ret)
1483 return ret;
1484
1485 drvdata->sync_freq = val & ETM_SYNC_MASK;
1486 return size;
1487 }
1488 static DEVICE_ATTR_RW(sync_freq);
1489
timestamp_event_show(struct device * dev,struct device_attribute * attr,char * buf)1490 static ssize_t timestamp_event_show(struct device *dev,
1491 struct device_attribute *attr, char *buf)
1492 {
1493 unsigned long val;
1494 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1495
1496 val = drvdata->timestamp_event;
1497 return sprintf(buf, "%#lx\n", val);
1498 }
1499
timestamp_event_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1500 static ssize_t timestamp_event_store(struct device *dev,
1501 struct device_attribute *attr,
1502 const char *buf, size_t size)
1503 {
1504 int ret;
1505 unsigned long val;
1506 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1507
1508 ret = kstrtoul(buf, 16, &val);
1509 if (ret)
1510 return ret;
1511
1512 drvdata->timestamp_event = val & ETM_EVENT_MASK;
1513 return size;
1514 }
1515 static DEVICE_ATTR_RW(timestamp_event);
1516
status_show(struct device * dev,struct device_attribute * attr,char * buf)1517 static ssize_t status_show(struct device *dev,
1518 struct device_attribute *attr, char *buf)
1519 {
1520 int ret;
1521 unsigned long flags;
1522 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1523
1524 ret = clk_prepare_enable(drvdata->clk);
1525 if (ret)
1526 return ret;
1527
1528 spin_lock_irqsave(&drvdata->spinlock, flags);
1529
1530 CS_UNLOCK(drvdata->base);
1531 ret = sprintf(buf,
1532 "ETMCCR: 0x%08x\n"
1533 "ETMCCER: 0x%08x\n"
1534 "ETMSCR: 0x%08x\n"
1535 "ETMIDR: 0x%08x\n"
1536 "ETMCR: 0x%08x\n"
1537 "ETMTRACEIDR: 0x%08x\n"
1538 "Enable event: 0x%08x\n"
1539 "Enable start/stop: 0x%08x\n"
1540 "Enable control: CR1 0x%08x CR2 0x%08x\n"
1541 "CPU affinity: %d\n",
1542 drvdata->etmccr, drvdata->etmccer,
1543 etm_readl(drvdata, ETMSCR), etm_readl(drvdata, ETMIDR),
1544 etm_readl(drvdata, ETMCR), etm_trace_id_simple(drvdata),
1545 etm_readl(drvdata, ETMTEEVR),
1546 etm_readl(drvdata, ETMTSSCR),
1547 etm_readl(drvdata, ETMTECR1),
1548 etm_readl(drvdata, ETMTECR2),
1549 drvdata->cpu);
1550 CS_LOCK(drvdata->base);
1551
1552 spin_unlock_irqrestore(&drvdata->spinlock, flags);
1553 clk_disable_unprepare(drvdata->clk);
1554
1555 return ret;
1556 }
1557 static DEVICE_ATTR_RO(status);
1558
traceid_show(struct device * dev,struct device_attribute * attr,char * buf)1559 static ssize_t traceid_show(struct device *dev,
1560 struct device_attribute *attr, char *buf)
1561 {
1562 int ret;
1563 unsigned long val, flags;
1564 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1565
1566 if (!drvdata->enable) {
1567 val = drvdata->traceid;
1568 goto out;
1569 }
1570
1571 ret = clk_prepare_enable(drvdata->clk);
1572 if (ret)
1573 return ret;
1574
1575 spin_lock_irqsave(&drvdata->spinlock, flags);
1576 CS_UNLOCK(drvdata->base);
1577
1578 val = (etm_readl(drvdata, ETMTRACEIDR) & ETM_TRACEID_MASK);
1579
1580 CS_LOCK(drvdata->base);
1581 spin_unlock_irqrestore(&drvdata->spinlock, flags);
1582 clk_disable_unprepare(drvdata->clk);
1583 out:
1584 return sprintf(buf, "%#lx\n", val);
1585 }
1586
traceid_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1587 static ssize_t traceid_store(struct device *dev,
1588 struct device_attribute *attr,
1589 const char *buf, size_t size)
1590 {
1591 int ret;
1592 unsigned long val;
1593 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1594
1595 ret = kstrtoul(buf, 16, &val);
1596 if (ret)
1597 return ret;
1598
1599 drvdata->traceid = val & ETM_TRACEID_MASK;
1600 return size;
1601 }
1602 static DEVICE_ATTR_RW(traceid);
1603
1604 static struct attribute *coresight_etm_attrs[] = {
1605 &dev_attr_nr_addr_cmp.attr,
1606 &dev_attr_nr_cntr.attr,
1607 &dev_attr_nr_ctxid_cmp.attr,
1608 &dev_attr_etmsr.attr,
1609 &dev_attr_reset.attr,
1610 &dev_attr_mode.attr,
1611 &dev_attr_trigger_event.attr,
1612 &dev_attr_enable_event.attr,
1613 &dev_attr_fifofull_level.attr,
1614 &dev_attr_addr_idx.attr,
1615 &dev_attr_addr_single.attr,
1616 &dev_attr_addr_range.attr,
1617 &dev_attr_addr_start.attr,
1618 &dev_attr_addr_stop.attr,
1619 &dev_attr_addr_acctype.attr,
1620 &dev_attr_cntr_idx.attr,
1621 &dev_attr_cntr_rld_val.attr,
1622 &dev_attr_cntr_event.attr,
1623 &dev_attr_cntr_rld_event.attr,
1624 &dev_attr_cntr_val.attr,
1625 &dev_attr_seq_12_event.attr,
1626 &dev_attr_seq_21_event.attr,
1627 &dev_attr_seq_23_event.attr,
1628 &dev_attr_seq_31_event.attr,
1629 &dev_attr_seq_32_event.attr,
1630 &dev_attr_seq_13_event.attr,
1631 &dev_attr_seq_curr_state.attr,
1632 &dev_attr_ctxid_idx.attr,
1633 &dev_attr_ctxid_val.attr,
1634 &dev_attr_ctxid_mask.attr,
1635 &dev_attr_sync_freq.attr,
1636 &dev_attr_timestamp_event.attr,
1637 &dev_attr_status.attr,
1638 &dev_attr_traceid.attr,
1639 NULL,
1640 };
1641 ATTRIBUTE_GROUPS(coresight_etm);
1642
etm_cpu_callback(struct notifier_block * nfb,unsigned long action,void * hcpu)1643 static int etm_cpu_callback(struct notifier_block *nfb, unsigned long action,
1644 void *hcpu)
1645 {
1646 unsigned int cpu = (unsigned long)hcpu;
1647
1648 if (!etmdrvdata[cpu])
1649 goto out;
1650
1651 switch (action & (~CPU_TASKS_FROZEN)) {
1652 case CPU_STARTING:
1653 spin_lock(&etmdrvdata[cpu]->spinlock);
1654 if (!etmdrvdata[cpu]->os_unlock) {
1655 etm_os_unlock(etmdrvdata[cpu]);
1656 etmdrvdata[cpu]->os_unlock = true;
1657 }
1658
1659 if (etmdrvdata[cpu]->enable)
1660 etm_enable_hw(etmdrvdata[cpu]);
1661 spin_unlock(&etmdrvdata[cpu]->spinlock);
1662 break;
1663
1664 case CPU_ONLINE:
1665 if (etmdrvdata[cpu]->boot_enable &&
1666 !etmdrvdata[cpu]->sticky_enable)
1667 coresight_enable(etmdrvdata[cpu]->csdev);
1668 break;
1669
1670 case CPU_DYING:
1671 spin_lock(&etmdrvdata[cpu]->spinlock);
1672 if (etmdrvdata[cpu]->enable)
1673 etm_disable_hw(etmdrvdata[cpu]);
1674 spin_unlock(&etmdrvdata[cpu]->spinlock);
1675 break;
1676 }
1677 out:
1678 return NOTIFY_OK;
1679 }
1680
1681 static struct notifier_block etm_cpu_notifier = {
1682 .notifier_call = etm_cpu_callback,
1683 };
1684
etm_arch_supported(u8 arch)1685 static bool etm_arch_supported(u8 arch)
1686 {
1687 switch (arch) {
1688 case ETM_ARCH_V3_3:
1689 break;
1690 case ETM_ARCH_V3_5:
1691 break;
1692 case PFT_ARCH_V1_0:
1693 break;
1694 case PFT_ARCH_V1_1:
1695 break;
1696 default:
1697 return false;
1698 }
1699 return true;
1700 }
1701
etm_init_arch_data(void * info)1702 static void etm_init_arch_data(void *info)
1703 {
1704 u32 etmidr;
1705 u32 etmccr;
1706 struct etm_drvdata *drvdata = info;
1707
1708 CS_UNLOCK(drvdata->base);
1709
1710 /* First dummy read */
1711 (void)etm_readl(drvdata, ETMPDSR);
1712 /* Provide power to ETM: ETMPDCR[3] == 1 */
1713 etm_set_pwrup(drvdata);
1714 /*
1715 * Clear power down bit since when this bit is set writes to
1716 * certain registers might be ignored.
1717 */
1718 etm_clr_pwrdwn(drvdata);
1719 /*
1720 * Set prog bit. It will be set from reset but this is included to
1721 * ensure it is set
1722 */
1723 etm_set_prog(drvdata);
1724
1725 /* Find all capabilities */
1726 etmidr = etm_readl(drvdata, ETMIDR);
1727 drvdata->arch = BMVAL(etmidr, 4, 11);
1728 drvdata->port_size = etm_readl(drvdata, ETMCR) & PORT_SIZE_MASK;
1729
1730 drvdata->etmccer = etm_readl(drvdata, ETMCCER);
1731 etmccr = etm_readl(drvdata, ETMCCR);
1732 drvdata->etmccr = etmccr;
1733 drvdata->nr_addr_cmp = BMVAL(etmccr, 0, 3) * 2;
1734 drvdata->nr_cntr = BMVAL(etmccr, 13, 15);
1735 drvdata->nr_ext_inp = BMVAL(etmccr, 17, 19);
1736 drvdata->nr_ext_out = BMVAL(etmccr, 20, 22);
1737 drvdata->nr_ctxid_cmp = BMVAL(etmccr, 24, 25);
1738
1739 etm_set_pwrdwn(drvdata);
1740 etm_clr_pwrup(drvdata);
1741 CS_LOCK(drvdata->base);
1742 }
1743
etm_init_default_data(struct etm_drvdata * drvdata)1744 static void etm_init_default_data(struct etm_drvdata *drvdata)
1745 {
1746 /*
1747 * A trace ID of value 0 is invalid, so let's start at some
1748 * random value that fits in 7 bits and will be just as good.
1749 */
1750 static int etm3x_traceid = 0x10;
1751
1752 u32 flags = (1 << 0 | /* instruction execute*/
1753 3 << 3 | /* ARM instruction */
1754 0 << 5 | /* No data value comparison */
1755 0 << 7 | /* No exact mach */
1756 0 << 8 | /* Ignore context ID */
1757 0 << 10); /* Security ignored */
1758
1759 /*
1760 * Initial configuration only - guarantees sources handled by
1761 * this driver have a unique ID at startup time but not between
1762 * all other types of sources. For that we lean on the core
1763 * framework.
1764 */
1765 drvdata->traceid = etm3x_traceid++;
1766 drvdata->ctrl = (ETMCR_CYC_ACC | ETMCR_TIMESTAMP_EN);
1767 drvdata->enable_ctrl1 = ETMTECR1_ADDR_COMP_1;
1768 if (drvdata->nr_addr_cmp >= 2) {
1769 drvdata->addr_val[0] = (u32) _stext;
1770 drvdata->addr_val[1] = (u32) _etext;
1771 drvdata->addr_acctype[0] = flags;
1772 drvdata->addr_acctype[1] = flags;
1773 drvdata->addr_type[0] = ETM_ADDR_TYPE_RANGE;
1774 drvdata->addr_type[1] = ETM_ADDR_TYPE_RANGE;
1775 }
1776
1777 etm_set_default(drvdata);
1778 }
1779
etm_probe(struct amba_device * adev,const struct amba_id * id)1780 static int etm_probe(struct amba_device *adev, const struct amba_id *id)
1781 {
1782 int ret;
1783 void __iomem *base;
1784 struct device *dev = &adev->dev;
1785 struct coresight_platform_data *pdata = NULL;
1786 struct etm_drvdata *drvdata;
1787 struct resource *res = &adev->res;
1788 struct coresight_desc *desc;
1789 struct device_node *np = adev->dev.of_node;
1790
1791 desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
1792 if (!desc)
1793 return -ENOMEM;
1794
1795 drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
1796 if (!drvdata)
1797 return -ENOMEM;
1798
1799 if (np) {
1800 pdata = of_get_coresight_platform_data(dev, np);
1801 if (IS_ERR(pdata))
1802 return PTR_ERR(pdata);
1803
1804 adev->dev.platform_data = pdata;
1805 drvdata->use_cp14 = of_property_read_bool(np, "arm,cp14");
1806 }
1807
1808 drvdata->dev = &adev->dev;
1809 dev_set_drvdata(dev, drvdata);
1810
1811 /* Validity for the resource is already checked by the AMBA core */
1812 base = devm_ioremap_resource(dev, res);
1813 if (IS_ERR(base))
1814 return PTR_ERR(base);
1815
1816 drvdata->base = base;
1817
1818 spin_lock_init(&drvdata->spinlock);
1819
1820 drvdata->clk = adev->pclk;
1821 ret = clk_prepare_enable(drvdata->clk);
1822 if (ret)
1823 return ret;
1824
1825 drvdata->cpu = pdata ? pdata->cpu : 0;
1826
1827 get_online_cpus();
1828 etmdrvdata[drvdata->cpu] = drvdata;
1829
1830 if (!smp_call_function_single(drvdata->cpu, etm_os_unlock, drvdata, 1))
1831 drvdata->os_unlock = true;
1832
1833 if (smp_call_function_single(drvdata->cpu,
1834 etm_init_arch_data, drvdata, 1))
1835 dev_err(dev, "ETM arch init failed\n");
1836
1837 if (!etm_count++)
1838 register_hotcpu_notifier(&etm_cpu_notifier);
1839
1840 put_online_cpus();
1841
1842 if (etm_arch_supported(drvdata->arch) == false) {
1843 ret = -EINVAL;
1844 goto err_arch_supported;
1845 }
1846 etm_init_default_data(drvdata);
1847
1848 clk_disable_unprepare(drvdata->clk);
1849
1850 desc->type = CORESIGHT_DEV_TYPE_SOURCE;
1851 desc->subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_PROC;
1852 desc->ops = &etm_cs_ops;
1853 desc->pdata = pdata;
1854 desc->dev = dev;
1855 desc->groups = coresight_etm_groups;
1856 drvdata->csdev = coresight_register(desc);
1857 if (IS_ERR(drvdata->csdev)) {
1858 ret = PTR_ERR(drvdata->csdev);
1859 goto err_arch_supported;
1860 }
1861
1862 dev_info(dev, "ETM initialized\n");
1863
1864 if (boot_enable) {
1865 coresight_enable(drvdata->csdev);
1866 drvdata->boot_enable = true;
1867 }
1868
1869 return 0;
1870
1871 err_arch_supported:
1872 clk_disable_unprepare(drvdata->clk);
1873 if (--etm_count == 0)
1874 unregister_hotcpu_notifier(&etm_cpu_notifier);
1875 return ret;
1876 }
1877
etm_remove(struct amba_device * adev)1878 static int etm_remove(struct amba_device *adev)
1879 {
1880 struct etm_drvdata *drvdata = amba_get_drvdata(adev);
1881
1882 coresight_unregister(drvdata->csdev);
1883 if (--etm_count == 0)
1884 unregister_hotcpu_notifier(&etm_cpu_notifier);
1885
1886 return 0;
1887 }
1888
1889 static struct amba_id etm_ids[] = {
1890 { /* ETM 3.3 */
1891 .id = 0x0003b921,
1892 .mask = 0x0003ffff,
1893 },
1894 { /* ETM 3.5 */
1895 .id = 0x0003b956,
1896 .mask = 0x0003ffff,
1897 },
1898 { /* PTM 1.0 */
1899 .id = 0x0003b950,
1900 .mask = 0x0003ffff,
1901 },
1902 { /* PTM 1.1 */
1903 .id = 0x0003b95f,
1904 .mask = 0x0003ffff,
1905 },
1906 { 0, 0},
1907 };
1908
1909 static struct amba_driver etm_driver = {
1910 .drv = {
1911 .name = "coresight-etm3x",
1912 .owner = THIS_MODULE,
1913 },
1914 .probe = etm_probe,
1915 .remove = etm_remove,
1916 .id_table = etm_ids,
1917 };
1918
etm_init(void)1919 int __init etm_init(void)
1920 {
1921 return amba_driver_register(&etm_driver);
1922 }
1923 module_init(etm_init);
1924
etm_exit(void)1925 void __exit etm_exit(void)
1926 {
1927 amba_driver_unregister(&etm_driver);
1928 }
1929 module_exit(etm_exit);
1930
1931 MODULE_LICENSE("GPL v2");
1932 MODULE_DESCRIPTION("CoreSight Program Flow Trace driver");
1933