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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
4 *
5 * Description: CoreSight Replicator driver
6 */
7
8#include <linux/acpi.h>
9#include <linux/amba/bus.h>
10#include <linux/kernel.h>
11#include <linux/device.h>
12#include <linux/platform_device.h>
13#include <linux/io.h>
14#include <linux/err.h>
15#include <linux/slab.h>
16#include <linux/pm_runtime.h>
17#include <linux/property.h>
18#include <linux/clk.h>
19#include <linux/of.h>
20#include <linux/coresight.h>
21
22#include "coresight-priv.h"
23
24#define REPLICATOR_IDFILTER0 0x000
25#define REPLICATOR_IDFILTER1 0x004
26
27DEFINE_CORESIGHT_DEVLIST(replicator_devs, "replicator");
28
29/**
30 * struct replicator_drvdata - specifics associated to a replicator component
31 * @base: memory mapped base address for this component. Also indicates
32 * whether this one is programmable or not.
33 * @atclk: optional clock for the core parts of the replicator.
34 * @pclk: APB clock if present, otherwise NULL
35 * @csdev: component vitals needed by the framework
36 * @spinlock: serialize enable/disable operations.
37 * @check_idfilter_val: check if the context is lost upon clock removal.
38 */
39struct replicator_drvdata {
40 void __iomem *base;
41 struct clk *atclk;
42 struct clk *pclk;
43 struct coresight_device *csdev;
44 spinlock_t spinlock;
45 bool check_idfilter_val;
46};
47
48static void dynamic_replicator_reset(struct replicator_drvdata *drvdata)
49{
50 struct coresight_device *csdev = drvdata->csdev;
51
52 CS_UNLOCK(drvdata->base);
53
54 if (!coresight_claim_device_unlocked(csdev)) {
55 writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER0);
56 writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER1);
57 coresight_disclaim_device_unlocked(csdev);
58 }
59
60 CS_LOCK(drvdata->base);
61}
62
63/*
64 * replicator_reset : Reset the replicator configuration to sane values.
65 */
66static inline void replicator_reset(struct replicator_drvdata *drvdata)
67{
68 if (drvdata->base)
69 dynamic_replicator_reset(drvdata);
70}
71
72static int dynamic_replicator_enable(struct replicator_drvdata *drvdata,
73 int inport, int outport)
74{
75 int rc = 0;
76 u32 id0val, id1val;
77 struct coresight_device *csdev = drvdata->csdev;
78
79 CS_UNLOCK(drvdata->base);
80
81 id0val = readl_relaxed(drvdata->base + REPLICATOR_IDFILTER0);
82 id1val = readl_relaxed(drvdata->base + REPLICATOR_IDFILTER1);
83
84 /*
85 * Some replicator designs lose context when AMBA clocks are removed,
86 * so have a check for this.
87 */
88 if (drvdata->check_idfilter_val && id0val == 0x0 && id1val == 0x0)
89 id0val = id1val = 0xff;
90
91 if (id0val == 0xff && id1val == 0xff)
92 rc = coresight_claim_device_unlocked(csdev);
93
94 if (!rc) {
95 switch (outport) {
96 case 0:
97 id0val = 0x0;
98 break;
99 case 1:
100 id1val = 0x0;
101 break;
102 default:
103 WARN_ON(1);
104 rc = -EINVAL;
105 }
106 }
107
108 /* Ensure that the outport is enabled. */
109 if (!rc) {
110 writel_relaxed(id0val, drvdata->base + REPLICATOR_IDFILTER0);
111 writel_relaxed(id1val, drvdata->base + REPLICATOR_IDFILTER1);
112 }
113
114 CS_LOCK(drvdata->base);
115
116 return rc;
117}
118
119static int replicator_enable(struct coresight_device *csdev,
120 struct coresight_connection *in,
121 struct coresight_connection *out)
122{
123 int rc = 0;
124 struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
125 unsigned long flags;
126 bool first_enable = false;
127
128 spin_lock_irqsave(&drvdata->spinlock, flags);
129 if (atomic_read(&out->src_refcnt) == 0) {
130 if (drvdata->base)
131 rc = dynamic_replicator_enable(drvdata, in->dest_port,
132 out->src_port);
133 if (!rc)
134 first_enable = true;
135 }
136 if (!rc)
137 atomic_inc(&out->src_refcnt);
138 spin_unlock_irqrestore(&drvdata->spinlock, flags);
139
140 if (first_enable)
141 dev_dbg(&csdev->dev, "REPLICATOR enabled\n");
142 return rc;
143}
144
145static void dynamic_replicator_disable(struct replicator_drvdata *drvdata,
146 int inport, int outport)
147{
148 u32 reg;
149 struct coresight_device *csdev = drvdata->csdev;
150
151 switch (outport) {
152 case 0:
153 reg = REPLICATOR_IDFILTER0;
154 break;
155 case 1:
156 reg = REPLICATOR_IDFILTER1;
157 break;
158 default:
159 WARN_ON(1);
160 return;
161 }
162
163 CS_UNLOCK(drvdata->base);
164
165 /* disable the flow of ATB data through port */
166 writel_relaxed(0xff, drvdata->base + reg);
167
168 if ((readl_relaxed(drvdata->base + REPLICATOR_IDFILTER0) == 0xff) &&
169 (readl_relaxed(drvdata->base + REPLICATOR_IDFILTER1) == 0xff))
170 coresight_disclaim_device_unlocked(csdev);
171 CS_LOCK(drvdata->base);
172}
173
174static void replicator_disable(struct coresight_device *csdev,
175 struct coresight_connection *in,
176 struct coresight_connection *out)
177{
178 struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
179 unsigned long flags;
180 bool last_disable = false;
181
182 spin_lock_irqsave(&drvdata->spinlock, flags);
183 if (atomic_dec_return(&out->src_refcnt) == 0) {
184 if (drvdata->base)
185 dynamic_replicator_disable(drvdata, in->dest_port,
186 out->src_port);
187 last_disable = true;
188 }
189 spin_unlock_irqrestore(&drvdata->spinlock, flags);
190
191 if (last_disable)
192 dev_dbg(&csdev->dev, "REPLICATOR disabled\n");
193}
194
195static const struct coresight_ops_link replicator_link_ops = {
196 .enable = replicator_enable,
197 .disable = replicator_disable,
198};
199
200static const struct coresight_ops replicator_cs_ops = {
201 .link_ops = &replicator_link_ops,
202};
203
204static struct attribute *replicator_mgmt_attrs[] = {
205 coresight_simple_reg32(idfilter0, REPLICATOR_IDFILTER0),
206 coresight_simple_reg32(idfilter1, REPLICATOR_IDFILTER1),
207 NULL,
208};
209
210static const struct attribute_group replicator_mgmt_group = {
211 .attrs = replicator_mgmt_attrs,
212 .name = "mgmt",
213};
214
215static const struct attribute_group *replicator_groups[] = {
216 &replicator_mgmt_group,
217 NULL,
218};
219
220static int replicator_probe(struct device *dev, struct resource *res)
221{
222 int ret = 0;
223 struct coresight_platform_data *pdata = NULL;
224 struct replicator_drvdata *drvdata;
225 struct coresight_desc desc = { 0 };
226 void __iomem *base;
227
228 if (is_of_node(dev_fwnode(dev)) &&
229 of_device_is_compatible(dev->of_node, "arm,coresight-replicator"))
230 dev_warn_once(dev,
231 "Uses OBSOLETE CoreSight replicator binding\n");
232
233 desc.name = coresight_alloc_device_name(&replicator_devs, dev);
234 if (!desc.name)
235 return -ENOMEM;
236
237 drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
238 if (!drvdata)
239 return -ENOMEM;
240
241 drvdata->atclk = devm_clk_get(dev, "atclk"); /* optional */
242 if (!IS_ERR(drvdata->atclk)) {
243 ret = clk_prepare_enable(drvdata->atclk);
244 if (ret)
245 return ret;
246 }
247
248 drvdata->pclk = coresight_get_enable_apb_pclk(dev);
249 if (IS_ERR(drvdata->pclk))
250 return -ENODEV;
251
252 /*
253 * Map the device base for dynamic-replicator, which has been
254 * validated by AMBA core
255 */
256 if (res) {
257 base = devm_ioremap_resource(dev, res);
258 if (IS_ERR(base)) {
259 ret = PTR_ERR(base);
260 goto out_disable_clk;
261 }
262 drvdata->base = base;
263 desc.groups = replicator_groups;
264 desc.access = CSDEV_ACCESS_IOMEM(base);
265 }
266
267 if (fwnode_property_present(dev_fwnode(dev),
268 "qcom,replicator-loses-context"))
269 drvdata->check_idfilter_val = true;
270
271 dev_set_drvdata(dev, drvdata);
272
273 pdata = coresight_get_platform_data(dev);
274 if (IS_ERR(pdata)) {
275 ret = PTR_ERR(pdata);
276 goto out_disable_clk;
277 }
278 dev->platform_data = pdata;
279
280 spin_lock_init(&drvdata->spinlock);
281 desc.type = CORESIGHT_DEV_TYPE_LINK;
282 desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
283 desc.ops = &replicator_cs_ops;
284 desc.pdata = dev->platform_data;
285 desc.dev = dev;
286
287 drvdata->csdev = coresight_register(&desc);
288 if (IS_ERR(drvdata->csdev)) {
289 ret = PTR_ERR(drvdata->csdev);
290 goto out_disable_clk;
291 }
292
293 replicator_reset(drvdata);
294
295out_disable_clk:
296 if (ret && !IS_ERR_OR_NULL(drvdata->atclk))
297 clk_disable_unprepare(drvdata->atclk);
298 if (ret && !IS_ERR_OR_NULL(drvdata->pclk))
299 clk_disable_unprepare(drvdata->pclk);
300 return ret;
301}
302
303static int replicator_remove(struct device *dev)
304{
305 struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
306
307 coresight_unregister(drvdata->csdev);
308 return 0;
309}
310
311static int replicator_platform_probe(struct platform_device *pdev)
312{
313 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
314 int ret;
315
316 pm_runtime_get_noresume(&pdev->dev);
317 pm_runtime_set_active(&pdev->dev);
318 pm_runtime_enable(&pdev->dev);
319
320 ret = replicator_probe(&pdev->dev, res);
321 pm_runtime_put(&pdev->dev);
322 if (ret)
323 pm_runtime_disable(&pdev->dev);
324
325 return ret;
326}
327
328static void replicator_platform_remove(struct platform_device *pdev)
329{
330 struct replicator_drvdata *drvdata = dev_get_drvdata(&pdev->dev);
331
332 if (WARN_ON(!drvdata))
333 return;
334
335 replicator_remove(&pdev->dev);
336 pm_runtime_disable(&pdev->dev);
337 if (!IS_ERR_OR_NULL(drvdata->pclk))
338 clk_put(drvdata->pclk);
339}
340
341#ifdef CONFIG_PM
342static int replicator_runtime_suspend(struct device *dev)
343{
344 struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
345
346 if (drvdata && !IS_ERR(drvdata->atclk))
347 clk_disable_unprepare(drvdata->atclk);
348
349 if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk))
350 clk_disable_unprepare(drvdata->pclk);
351 return 0;
352}
353
354static int replicator_runtime_resume(struct device *dev)
355{
356 struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
357
358 if (drvdata && !IS_ERR(drvdata->atclk))
359 clk_prepare_enable(drvdata->atclk);
360
361 if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk))
362 clk_prepare_enable(drvdata->pclk);
363 return 0;
364}
365#endif
366
367static const struct dev_pm_ops replicator_dev_pm_ops = {
368 SET_RUNTIME_PM_OPS(replicator_runtime_suspend,
369 replicator_runtime_resume, NULL)
370};
371
372static const struct of_device_id replicator_match[] = {
373 {.compatible = "arm,coresight-replicator"},
374 {.compatible = "arm,coresight-static-replicator"},
375 {}
376};
377
378MODULE_DEVICE_TABLE(of, replicator_match);
379
380#ifdef CONFIG_ACPI
381static const struct acpi_device_id replicator_acpi_ids[] = {
382 {"ARMHC985", 0, 0, 0}, /* ARM CoreSight Static Replicator */
383 {"ARMHC98D", 0, 0, 0}, /* ARM CoreSight Dynamic Replicator */
384 {}
385};
386
387MODULE_DEVICE_TABLE(acpi, replicator_acpi_ids);
388#endif
389
390static struct platform_driver replicator_driver = {
391 .probe = replicator_platform_probe,
392 .remove = replicator_platform_remove,
393 .driver = {
394 .name = "coresight-replicator",
395 /* THIS_MODULE is taken care of by platform_driver_register() */
396 .of_match_table = of_match_ptr(replicator_match),
397 .acpi_match_table = ACPI_PTR(replicator_acpi_ids),
398 .pm = &replicator_dev_pm_ops,
399 .suppress_bind_attrs = true,
400 },
401};
402
403static int dynamic_replicator_probe(struct amba_device *adev,
404 const struct amba_id *id)
405{
406 int ret;
407
408 ret = replicator_probe(&adev->dev, &adev->res);
409 if (!ret)
410 pm_runtime_put(&adev->dev);
411
412 return ret;
413}
414
415static void dynamic_replicator_remove(struct amba_device *adev)
416{
417 replicator_remove(&adev->dev);
418}
419
420static const struct amba_id dynamic_replicator_ids[] = {
421 CS_AMBA_ID(0x000bb909),
422 CS_AMBA_ID(0x000bb9ec), /* Coresight SoC-600 */
423 {},
424};
425
426MODULE_DEVICE_TABLE(amba, dynamic_replicator_ids);
427
428static struct amba_driver dynamic_replicator_driver = {
429 .drv = {
430 .name = "coresight-dynamic-replicator",
431 .pm = &replicator_dev_pm_ops,
432 .suppress_bind_attrs = true,
433 },
434 .probe = dynamic_replicator_probe,
435 .remove = dynamic_replicator_remove,
436 .id_table = dynamic_replicator_ids,
437};
438
439static int __init replicator_init(void)
440{
441 return coresight_init_driver("replicator", &dynamic_replicator_driver, &replicator_driver);
442}
443
444static void __exit replicator_exit(void)
445{
446 coresight_remove_driver(&dynamic_replicator_driver, &replicator_driver);
447}
448
449module_init(replicator_init);
450module_exit(replicator_exit);
451
452MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
453MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
454MODULE_DESCRIPTION("Arm CoreSight Replicator Driver");
455MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
4 *
5 * Description: CoreSight Replicator driver
6 */
7
8#include <linux/acpi.h>
9#include <linux/amba/bus.h>
10#include <linux/kernel.h>
11#include <linux/device.h>
12#include <linux/platform_device.h>
13#include <linux/io.h>
14#include <linux/err.h>
15#include <linux/slab.h>
16#include <linux/pm_runtime.h>
17#include <linux/property.h>
18#include <linux/clk.h>
19#include <linux/of.h>
20#include <linux/coresight.h>
21
22#include "coresight-priv.h"
23
24#define REPLICATOR_IDFILTER0 0x000
25#define REPLICATOR_IDFILTER1 0x004
26
27DEFINE_CORESIGHT_DEVLIST(replicator_devs, "replicator");
28
29/**
30 * struct replicator_drvdata - specifics associated to a replicator component
31 * @base: memory mapped base address for this component. Also indicates
32 * whether this one is programmable or not.
33 * @atclk: optional clock for the core parts of the replicator.
34 * @csdev: component vitals needed by the framework
35 * @spinlock: serialize enable/disable operations.
36 * @check_idfilter_val: check if the context is lost upon clock removal.
37 */
38struct replicator_drvdata {
39 void __iomem *base;
40 struct clk *atclk;
41 struct coresight_device *csdev;
42 spinlock_t spinlock;
43 bool check_idfilter_val;
44};
45
46static void dynamic_replicator_reset(struct replicator_drvdata *drvdata)
47{
48 struct coresight_device *csdev = drvdata->csdev;
49
50 CS_UNLOCK(drvdata->base);
51
52 if (!coresight_claim_device_unlocked(csdev)) {
53 writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER0);
54 writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER1);
55 coresight_disclaim_device_unlocked(csdev);
56 }
57
58 CS_LOCK(drvdata->base);
59}
60
61/*
62 * replicator_reset : Reset the replicator configuration to sane values.
63 */
64static inline void replicator_reset(struct replicator_drvdata *drvdata)
65{
66 if (drvdata->base)
67 dynamic_replicator_reset(drvdata);
68}
69
70static int dynamic_replicator_enable(struct replicator_drvdata *drvdata,
71 int inport, int outport)
72{
73 int rc = 0;
74 u32 id0val, id1val;
75 struct coresight_device *csdev = drvdata->csdev;
76
77 CS_UNLOCK(drvdata->base);
78
79 id0val = readl_relaxed(drvdata->base + REPLICATOR_IDFILTER0);
80 id1val = readl_relaxed(drvdata->base + REPLICATOR_IDFILTER1);
81
82 /*
83 * Some replicator designs lose context when AMBA clocks are removed,
84 * so have a check for this.
85 */
86 if (drvdata->check_idfilter_val && id0val == 0x0 && id1val == 0x0)
87 id0val = id1val = 0xff;
88
89 if (id0val == 0xff && id1val == 0xff)
90 rc = coresight_claim_device_unlocked(csdev);
91
92 if (!rc) {
93 switch (outport) {
94 case 0:
95 id0val = 0x0;
96 break;
97 case 1:
98 id1val = 0x0;
99 break;
100 default:
101 WARN_ON(1);
102 rc = -EINVAL;
103 }
104 }
105
106 /* Ensure that the outport is enabled. */
107 if (!rc) {
108 writel_relaxed(id0val, drvdata->base + REPLICATOR_IDFILTER0);
109 writel_relaxed(id1val, drvdata->base + REPLICATOR_IDFILTER1);
110 }
111
112 CS_LOCK(drvdata->base);
113
114 return rc;
115}
116
117static int replicator_enable(struct coresight_device *csdev, int inport,
118 int outport)
119{
120 int rc = 0;
121 struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
122 unsigned long flags;
123 bool first_enable = false;
124
125 spin_lock_irqsave(&drvdata->spinlock, flags);
126 if (atomic_read(&csdev->refcnt[outport]) == 0) {
127 if (drvdata->base)
128 rc = dynamic_replicator_enable(drvdata, inport,
129 outport);
130 if (!rc)
131 first_enable = true;
132 }
133 if (!rc)
134 atomic_inc(&csdev->refcnt[outport]);
135 spin_unlock_irqrestore(&drvdata->spinlock, flags);
136
137 if (first_enable)
138 dev_dbg(&csdev->dev, "REPLICATOR enabled\n");
139 return rc;
140}
141
142static void dynamic_replicator_disable(struct replicator_drvdata *drvdata,
143 int inport, int outport)
144{
145 u32 reg;
146 struct coresight_device *csdev = drvdata->csdev;
147
148 switch (outport) {
149 case 0:
150 reg = REPLICATOR_IDFILTER0;
151 break;
152 case 1:
153 reg = REPLICATOR_IDFILTER1;
154 break;
155 default:
156 WARN_ON(1);
157 return;
158 }
159
160 CS_UNLOCK(drvdata->base);
161
162 /* disable the flow of ATB data through port */
163 writel_relaxed(0xff, drvdata->base + reg);
164
165 if ((readl_relaxed(drvdata->base + REPLICATOR_IDFILTER0) == 0xff) &&
166 (readl_relaxed(drvdata->base + REPLICATOR_IDFILTER1) == 0xff))
167 coresight_disclaim_device_unlocked(csdev);
168 CS_LOCK(drvdata->base);
169}
170
171static void replicator_disable(struct coresight_device *csdev, int inport,
172 int outport)
173{
174 struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
175 unsigned long flags;
176 bool last_disable = false;
177
178 spin_lock_irqsave(&drvdata->spinlock, flags);
179 if (atomic_dec_return(&csdev->refcnt[outport]) == 0) {
180 if (drvdata->base)
181 dynamic_replicator_disable(drvdata, inport, outport);
182 last_disable = true;
183 }
184 spin_unlock_irqrestore(&drvdata->spinlock, flags);
185
186 if (last_disable)
187 dev_dbg(&csdev->dev, "REPLICATOR disabled\n");
188}
189
190static const struct coresight_ops_link replicator_link_ops = {
191 .enable = replicator_enable,
192 .disable = replicator_disable,
193};
194
195static const struct coresight_ops replicator_cs_ops = {
196 .link_ops = &replicator_link_ops,
197};
198
199#define coresight_replicator_reg(name, offset) \
200 coresight_simple_reg32(struct replicator_drvdata, name, offset)
201
202coresight_replicator_reg(idfilter0, REPLICATOR_IDFILTER0);
203coresight_replicator_reg(idfilter1, REPLICATOR_IDFILTER1);
204
205static struct attribute *replicator_mgmt_attrs[] = {
206 &dev_attr_idfilter0.attr,
207 &dev_attr_idfilter1.attr,
208 NULL,
209};
210
211static const struct attribute_group replicator_mgmt_group = {
212 .attrs = replicator_mgmt_attrs,
213 .name = "mgmt",
214};
215
216static const struct attribute_group *replicator_groups[] = {
217 &replicator_mgmt_group,
218 NULL,
219};
220
221static int replicator_probe(struct device *dev, struct resource *res)
222{
223 int ret = 0;
224 struct coresight_platform_data *pdata = NULL;
225 struct replicator_drvdata *drvdata;
226 struct coresight_desc desc = { 0 };
227 void __iomem *base;
228
229 if (is_of_node(dev_fwnode(dev)) &&
230 of_device_is_compatible(dev->of_node, "arm,coresight-replicator"))
231 dev_warn_once(dev,
232 "Uses OBSOLETE CoreSight replicator binding\n");
233
234 desc.name = coresight_alloc_device_name(&replicator_devs, dev);
235 if (!desc.name)
236 return -ENOMEM;
237
238 drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
239 if (!drvdata)
240 return -ENOMEM;
241
242 drvdata->atclk = devm_clk_get(dev, "atclk"); /* optional */
243 if (!IS_ERR(drvdata->atclk)) {
244 ret = clk_prepare_enable(drvdata->atclk);
245 if (ret)
246 return ret;
247 }
248
249 /*
250 * Map the device base for dynamic-replicator, which has been
251 * validated by AMBA core
252 */
253 if (res) {
254 base = devm_ioremap_resource(dev, res);
255 if (IS_ERR(base)) {
256 ret = PTR_ERR(base);
257 goto out_disable_clk;
258 }
259 drvdata->base = base;
260 desc.groups = replicator_groups;
261 desc.access = CSDEV_ACCESS_IOMEM(base);
262 }
263
264 if (fwnode_property_present(dev_fwnode(dev),
265 "qcom,replicator-loses-context"))
266 drvdata->check_idfilter_val = true;
267
268 dev_set_drvdata(dev, drvdata);
269
270 pdata = coresight_get_platform_data(dev);
271 if (IS_ERR(pdata)) {
272 ret = PTR_ERR(pdata);
273 goto out_disable_clk;
274 }
275 dev->platform_data = pdata;
276
277 spin_lock_init(&drvdata->spinlock);
278 desc.type = CORESIGHT_DEV_TYPE_LINK;
279 desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
280 desc.ops = &replicator_cs_ops;
281 desc.pdata = dev->platform_data;
282 desc.dev = dev;
283
284 drvdata->csdev = coresight_register(&desc);
285 if (IS_ERR(drvdata->csdev)) {
286 ret = PTR_ERR(drvdata->csdev);
287 goto out_disable_clk;
288 }
289
290 replicator_reset(drvdata);
291 pm_runtime_put(dev);
292
293out_disable_clk:
294 if (ret && !IS_ERR_OR_NULL(drvdata->atclk))
295 clk_disable_unprepare(drvdata->atclk);
296 return ret;
297}
298
299static int replicator_remove(struct device *dev)
300{
301 struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
302
303 coresight_unregister(drvdata->csdev);
304 return 0;
305}
306
307static int static_replicator_probe(struct platform_device *pdev)
308{
309 int ret;
310
311 pm_runtime_get_noresume(&pdev->dev);
312 pm_runtime_set_active(&pdev->dev);
313 pm_runtime_enable(&pdev->dev);
314
315 /* Static replicators do not have programming base */
316 ret = replicator_probe(&pdev->dev, NULL);
317
318 if (ret) {
319 pm_runtime_put_noidle(&pdev->dev);
320 pm_runtime_disable(&pdev->dev);
321 }
322
323 return ret;
324}
325
326static int static_replicator_remove(struct platform_device *pdev)
327{
328 replicator_remove(&pdev->dev);
329 pm_runtime_disable(&pdev->dev);
330 return 0;
331}
332
333#ifdef CONFIG_PM
334static int replicator_runtime_suspend(struct device *dev)
335{
336 struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
337
338 if (drvdata && !IS_ERR(drvdata->atclk))
339 clk_disable_unprepare(drvdata->atclk);
340
341 return 0;
342}
343
344static int replicator_runtime_resume(struct device *dev)
345{
346 struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
347
348 if (drvdata && !IS_ERR(drvdata->atclk))
349 clk_prepare_enable(drvdata->atclk);
350
351 return 0;
352}
353#endif
354
355static const struct dev_pm_ops replicator_dev_pm_ops = {
356 SET_RUNTIME_PM_OPS(replicator_runtime_suspend,
357 replicator_runtime_resume, NULL)
358};
359
360static const struct of_device_id static_replicator_match[] = {
361 {.compatible = "arm,coresight-replicator"},
362 {.compatible = "arm,coresight-static-replicator"},
363 {}
364};
365
366MODULE_DEVICE_TABLE(of, static_replicator_match);
367
368#ifdef CONFIG_ACPI
369static const struct acpi_device_id static_replicator_acpi_ids[] = {
370 {"ARMHC985", 0}, /* ARM CoreSight Static Replicator */
371 {}
372};
373
374MODULE_DEVICE_TABLE(acpi, static_replicator_acpi_ids);
375#endif
376
377static struct platform_driver static_replicator_driver = {
378 .probe = static_replicator_probe,
379 .remove = static_replicator_remove,
380 .driver = {
381 .name = "coresight-static-replicator",
382 /* THIS_MODULE is taken care of by platform_driver_register() */
383 .of_match_table = of_match_ptr(static_replicator_match),
384 .acpi_match_table = ACPI_PTR(static_replicator_acpi_ids),
385 .pm = &replicator_dev_pm_ops,
386 .suppress_bind_attrs = true,
387 },
388};
389
390static int dynamic_replicator_probe(struct amba_device *adev,
391 const struct amba_id *id)
392{
393 return replicator_probe(&adev->dev, &adev->res);
394}
395
396static void dynamic_replicator_remove(struct amba_device *adev)
397{
398 replicator_remove(&adev->dev);
399}
400
401static const struct amba_id dynamic_replicator_ids[] = {
402 CS_AMBA_ID(0x000bb909),
403 CS_AMBA_ID(0x000bb9ec), /* Coresight SoC-600 */
404 {},
405};
406
407MODULE_DEVICE_TABLE(amba, dynamic_replicator_ids);
408
409static struct amba_driver dynamic_replicator_driver = {
410 .drv = {
411 .name = "coresight-dynamic-replicator",
412 .pm = &replicator_dev_pm_ops,
413 .owner = THIS_MODULE,
414 .suppress_bind_attrs = true,
415 },
416 .probe = dynamic_replicator_probe,
417 .remove = dynamic_replicator_remove,
418 .id_table = dynamic_replicator_ids,
419};
420
421static int __init replicator_init(void)
422{
423 int ret;
424
425 ret = platform_driver_register(&static_replicator_driver);
426 if (ret) {
427 pr_info("Error registering platform driver\n");
428 return ret;
429 }
430
431 ret = amba_driver_register(&dynamic_replicator_driver);
432 if (ret) {
433 pr_info("Error registering amba driver\n");
434 platform_driver_unregister(&static_replicator_driver);
435 }
436
437 return ret;
438}
439
440static void __exit replicator_exit(void)
441{
442 platform_driver_unregister(&static_replicator_driver);
443 amba_driver_unregister(&dynamic_replicator_driver);
444}
445
446module_init(replicator_init);
447module_exit(replicator_exit);
448
449MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
450MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
451MODULE_DESCRIPTION("Arm CoreSight Replicator Driver");
452MODULE_LICENSE("GPL v2");