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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
4 *
5 * Description: CoreSight Funnel driver
6 */
7
8#include <linux/acpi.h>
9#include <linux/kernel.h>
10#include <linux/init.h>
11#include <linux/types.h>
12#include <linux/device.h>
13#include <linux/err.h>
14#include <linux/fs.h>
15#include <linux/slab.h>
16#include <linux/of.h>
17#include <linux/platform_device.h>
18#include <linux/pm_runtime.h>
19#include <linux/coresight.h>
20#include <linux/amba/bus.h>
21#include <linux/clk.h>
22
23#include "coresight-priv.h"
24
25#define FUNNEL_FUNCTL 0x000
26#define FUNNEL_PRICTL 0x004
27
28#define FUNNEL_HOLDTIME_MASK 0xf00
29#define FUNNEL_HOLDTIME_SHFT 0x8
30#define FUNNEL_HOLDTIME (0x7 << FUNNEL_HOLDTIME_SHFT)
31#define FUNNEL_ENSx_MASK 0xff
32
33DEFINE_CORESIGHT_DEVLIST(funnel_devs, "funnel");
34
35/**
36 * struct funnel_drvdata - specifics associated to a funnel component
37 * @base: memory mapped base address for this component.
38 * @atclk: optional clock for the core parts of the funnel.
39 * @pclk: APB clock if present, otherwise NULL
40 * @csdev: component vitals needed by the framework.
41 * @priority: port selection order.
42 * @spinlock: serialize enable/disable operations.
43 */
44struct funnel_drvdata {
45 void __iomem *base;
46 struct clk *atclk;
47 struct clk *pclk;
48 struct coresight_device *csdev;
49 unsigned long priority;
50 spinlock_t spinlock;
51};
52
53static int dynamic_funnel_enable_hw(struct funnel_drvdata *drvdata, int port)
54{
55 u32 functl;
56 int rc = 0;
57 struct coresight_device *csdev = drvdata->csdev;
58
59 CS_UNLOCK(drvdata->base);
60
61 functl = readl_relaxed(drvdata->base + FUNNEL_FUNCTL);
62 /* Claim the device only when we enable the first slave */
63 if (!(functl & FUNNEL_ENSx_MASK)) {
64 rc = coresight_claim_device_unlocked(csdev);
65 if (rc)
66 goto done;
67 }
68
69 functl &= ~FUNNEL_HOLDTIME_MASK;
70 functl |= FUNNEL_HOLDTIME;
71 functl |= (1 << port);
72 writel_relaxed(functl, drvdata->base + FUNNEL_FUNCTL);
73 writel_relaxed(drvdata->priority, drvdata->base + FUNNEL_PRICTL);
74done:
75 CS_LOCK(drvdata->base);
76 return rc;
77}
78
79static int funnel_enable(struct coresight_device *csdev,
80 struct coresight_connection *in,
81 struct coresight_connection *out)
82{
83 int rc = 0;
84 struct funnel_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
85 unsigned long flags;
86 bool first_enable = false;
87
88 spin_lock_irqsave(&drvdata->spinlock, flags);
89 if (atomic_read(&in->dest_refcnt) == 0) {
90 if (drvdata->base)
91 rc = dynamic_funnel_enable_hw(drvdata, in->dest_port);
92 if (!rc)
93 first_enable = true;
94 }
95 if (!rc)
96 atomic_inc(&in->dest_refcnt);
97 spin_unlock_irqrestore(&drvdata->spinlock, flags);
98
99 if (first_enable)
100 dev_dbg(&csdev->dev, "FUNNEL inport %d enabled\n",
101 in->dest_port);
102 return rc;
103}
104
105static void dynamic_funnel_disable_hw(struct funnel_drvdata *drvdata,
106 int inport)
107{
108 u32 functl;
109 struct coresight_device *csdev = drvdata->csdev;
110
111 CS_UNLOCK(drvdata->base);
112
113 functl = readl_relaxed(drvdata->base + FUNNEL_FUNCTL);
114 functl &= ~(1 << inport);
115 writel_relaxed(functl, drvdata->base + FUNNEL_FUNCTL);
116
117 /* Disclaim the device if none of the slaves are now active */
118 if (!(functl & FUNNEL_ENSx_MASK))
119 coresight_disclaim_device_unlocked(csdev);
120
121 CS_LOCK(drvdata->base);
122}
123
124static void funnel_disable(struct coresight_device *csdev,
125 struct coresight_connection *in,
126 struct coresight_connection *out)
127{
128 struct funnel_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
129 unsigned long flags;
130 bool last_disable = false;
131
132 spin_lock_irqsave(&drvdata->spinlock, flags);
133 if (atomic_dec_return(&in->dest_refcnt) == 0) {
134 if (drvdata->base)
135 dynamic_funnel_disable_hw(drvdata, in->dest_port);
136 last_disable = true;
137 }
138 spin_unlock_irqrestore(&drvdata->spinlock, flags);
139
140 if (last_disable)
141 dev_dbg(&csdev->dev, "FUNNEL inport %d disabled\n",
142 in->dest_port);
143}
144
145static const struct coresight_ops_link funnel_link_ops = {
146 .enable = funnel_enable,
147 .disable = funnel_disable,
148};
149
150static const struct coresight_ops funnel_cs_ops = {
151 .link_ops = &funnel_link_ops,
152};
153
154static ssize_t priority_show(struct device *dev,
155 struct device_attribute *attr, char *buf)
156{
157 struct funnel_drvdata *drvdata = dev_get_drvdata(dev->parent);
158 unsigned long val = drvdata->priority;
159
160 return sprintf(buf, "%#lx\n", val);
161}
162
163static ssize_t priority_store(struct device *dev,
164 struct device_attribute *attr,
165 const char *buf, size_t size)
166{
167 int ret;
168 unsigned long val;
169 struct funnel_drvdata *drvdata = dev_get_drvdata(dev->parent);
170
171 ret = kstrtoul(buf, 16, &val);
172 if (ret)
173 return ret;
174
175 drvdata->priority = val;
176 return size;
177}
178static DEVICE_ATTR_RW(priority);
179
180static u32 get_funnel_ctrl_hw(struct funnel_drvdata *drvdata)
181{
182 u32 functl;
183
184 CS_UNLOCK(drvdata->base);
185 functl = readl_relaxed(drvdata->base + FUNNEL_FUNCTL);
186 CS_LOCK(drvdata->base);
187
188 return functl;
189}
190
191static ssize_t funnel_ctrl_show(struct device *dev,
192 struct device_attribute *attr, char *buf)
193{
194 u32 val;
195 struct funnel_drvdata *drvdata = dev_get_drvdata(dev->parent);
196
197 pm_runtime_get_sync(dev->parent);
198
199 val = get_funnel_ctrl_hw(drvdata);
200
201 pm_runtime_put(dev->parent);
202
203 return sprintf(buf, "%#x\n", val);
204}
205static DEVICE_ATTR_RO(funnel_ctrl);
206
207static struct attribute *coresight_funnel_attrs[] = {
208 &dev_attr_funnel_ctrl.attr,
209 &dev_attr_priority.attr,
210 NULL,
211};
212ATTRIBUTE_GROUPS(coresight_funnel);
213
214static int funnel_probe(struct device *dev, struct resource *res)
215{
216 int ret;
217 void __iomem *base;
218 struct coresight_platform_data *pdata = NULL;
219 struct funnel_drvdata *drvdata;
220 struct coresight_desc desc = { 0 };
221
222 if (is_of_node(dev_fwnode(dev)) &&
223 of_device_is_compatible(dev->of_node, "arm,coresight-funnel"))
224 dev_warn_once(dev, "Uses OBSOLETE CoreSight funnel binding\n");
225
226 desc.name = coresight_alloc_device_name(&funnel_devs, dev);
227 if (!desc.name)
228 return -ENOMEM;
229
230 drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
231 if (!drvdata)
232 return -ENOMEM;
233
234 drvdata->atclk = devm_clk_get(dev, "atclk"); /* optional */
235 if (!IS_ERR(drvdata->atclk)) {
236 ret = clk_prepare_enable(drvdata->atclk);
237 if (ret)
238 return ret;
239 }
240
241 drvdata->pclk = coresight_get_enable_apb_pclk(dev);
242 if (IS_ERR(drvdata->pclk))
243 return -ENODEV;
244
245 /*
246 * Map the device base for dynamic-funnel, which has been
247 * validated by AMBA core.
248 */
249 if (res) {
250 base = devm_ioremap_resource(dev, res);
251 if (IS_ERR(base)) {
252 ret = PTR_ERR(base);
253 goto out_disable_clk;
254 }
255 drvdata->base = base;
256 desc.groups = coresight_funnel_groups;
257 desc.access = CSDEV_ACCESS_IOMEM(base);
258 }
259
260 dev_set_drvdata(dev, drvdata);
261
262 pdata = coresight_get_platform_data(dev);
263 if (IS_ERR(pdata)) {
264 ret = PTR_ERR(pdata);
265 goto out_disable_clk;
266 }
267 dev->platform_data = pdata;
268
269 spin_lock_init(&drvdata->spinlock);
270 desc.type = CORESIGHT_DEV_TYPE_LINK;
271 desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_MERG;
272 desc.ops = &funnel_cs_ops;
273 desc.pdata = pdata;
274 desc.dev = dev;
275 drvdata->csdev = coresight_register(&desc);
276 if (IS_ERR(drvdata->csdev)) {
277 ret = PTR_ERR(drvdata->csdev);
278 goto out_disable_clk;
279 }
280
281 ret = 0;
282
283out_disable_clk:
284 if (ret && !IS_ERR_OR_NULL(drvdata->atclk))
285 clk_disable_unprepare(drvdata->atclk);
286 if (ret && !IS_ERR_OR_NULL(drvdata->pclk))
287 clk_disable_unprepare(drvdata->pclk);
288 return ret;
289}
290
291static int funnel_remove(struct device *dev)
292{
293 struct funnel_drvdata *drvdata = dev_get_drvdata(dev);
294
295 coresight_unregister(drvdata->csdev);
296
297 return 0;
298}
299
300#ifdef CONFIG_PM
301static int funnel_runtime_suspend(struct device *dev)
302{
303 struct funnel_drvdata *drvdata = dev_get_drvdata(dev);
304
305 if (drvdata && !IS_ERR(drvdata->atclk))
306 clk_disable_unprepare(drvdata->atclk);
307
308 if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk))
309 clk_disable_unprepare(drvdata->pclk);
310
311 return 0;
312}
313
314static int funnel_runtime_resume(struct device *dev)
315{
316 struct funnel_drvdata *drvdata = dev_get_drvdata(dev);
317
318 if (drvdata && !IS_ERR(drvdata->atclk))
319 clk_prepare_enable(drvdata->atclk);
320
321 if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk))
322 clk_prepare_enable(drvdata->pclk);
323 return 0;
324}
325#endif
326
327static const struct dev_pm_ops funnel_dev_pm_ops = {
328 SET_RUNTIME_PM_OPS(funnel_runtime_suspend, funnel_runtime_resume, NULL)
329};
330
331static int funnel_platform_probe(struct platform_device *pdev)
332{
333 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
334 int ret;
335
336 pm_runtime_get_noresume(&pdev->dev);
337 pm_runtime_set_active(&pdev->dev);
338 pm_runtime_enable(&pdev->dev);
339
340 ret = funnel_probe(&pdev->dev, res);
341 pm_runtime_put(&pdev->dev);
342 if (ret)
343 pm_runtime_disable(&pdev->dev);
344
345 return ret;
346}
347
348static void funnel_platform_remove(struct platform_device *pdev)
349{
350 struct funnel_drvdata *drvdata = dev_get_drvdata(&pdev->dev);
351
352 if (WARN_ON(!drvdata))
353 return;
354
355 funnel_remove(&pdev->dev);
356 pm_runtime_disable(&pdev->dev);
357 if (!IS_ERR_OR_NULL(drvdata->pclk))
358 clk_put(drvdata->pclk);
359}
360
361static const struct of_device_id funnel_match[] = {
362 {.compatible = "arm,coresight-static-funnel"},
363 {}
364};
365
366MODULE_DEVICE_TABLE(of, funnel_match);
367
368#ifdef CONFIG_ACPI
369static const struct acpi_device_id funnel_acpi_ids[] = {
370 {"ARMHC9FE", 0, 0, 0}, /* ARM Coresight Static Funnel */
371 {"ARMHC9FF", 0, 0, 0}, /* ARM CoreSight Dynamic Funnel */
372 {},
373};
374
375MODULE_DEVICE_TABLE(acpi, funnel_acpi_ids);
376#endif
377
378static struct platform_driver funnel_driver = {
379 .probe = funnel_platform_probe,
380 .remove = funnel_platform_remove,
381 .driver = {
382 .name = "coresight-funnel",
383 /* THIS_MODULE is taken care of by platform_driver_register() */
384 .of_match_table = funnel_match,
385 .acpi_match_table = ACPI_PTR(funnel_acpi_ids),
386 .pm = &funnel_dev_pm_ops,
387 .suppress_bind_attrs = true,
388 },
389};
390
391static int dynamic_funnel_probe(struct amba_device *adev,
392 const struct amba_id *id)
393{
394 int ret;
395
396 ret = funnel_probe(&adev->dev, &adev->res);
397 if (!ret)
398 pm_runtime_put(&adev->dev);
399
400 return ret;
401}
402
403static void dynamic_funnel_remove(struct amba_device *adev)
404{
405 funnel_remove(&adev->dev);
406}
407
408static const struct amba_id dynamic_funnel_ids[] = {
409 {
410 .id = 0x000bb908,
411 .mask = 0x000fffff,
412 },
413 {
414 /* Coresight SoC-600 */
415 .id = 0x000bb9eb,
416 .mask = 0x000fffff,
417 },
418 { 0, 0, NULL },
419};
420
421MODULE_DEVICE_TABLE(amba, dynamic_funnel_ids);
422
423static struct amba_driver dynamic_funnel_driver = {
424 .drv = {
425 .name = "coresight-dynamic-funnel",
426 .pm = &funnel_dev_pm_ops,
427 .suppress_bind_attrs = true,
428 },
429 .probe = dynamic_funnel_probe,
430 .remove = dynamic_funnel_remove,
431 .id_table = dynamic_funnel_ids,
432};
433
434static int __init funnel_init(void)
435{
436 return coresight_init_driver("funnel", &dynamic_funnel_driver, &funnel_driver);
437}
438
439static void __exit funnel_exit(void)
440{
441 coresight_remove_driver(&dynamic_funnel_driver, &funnel_driver);
442}
443
444module_init(funnel_init);
445module_exit(funnel_exit);
446
447MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
448MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
449MODULE_DESCRIPTION("Arm CoreSight Funnel Driver");
450MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
4 *
5 * Description: CoreSight Funnel driver
6 */
7
8#include <linux/acpi.h>
9#include <linux/kernel.h>
10#include <linux/init.h>
11#include <linux/types.h>
12#include <linux/device.h>
13#include <linux/err.h>
14#include <linux/fs.h>
15#include <linux/slab.h>
16#include <linux/of.h>
17#include <linux/platform_device.h>
18#include <linux/pm_runtime.h>
19#include <linux/coresight.h>
20#include <linux/amba/bus.h>
21#include <linux/clk.h>
22
23#include "coresight-priv.h"
24
25#define FUNNEL_FUNCTL 0x000
26#define FUNNEL_PRICTL 0x004
27
28#define FUNNEL_HOLDTIME_MASK 0xf00
29#define FUNNEL_HOLDTIME_SHFT 0x8
30#define FUNNEL_HOLDTIME (0x7 << FUNNEL_HOLDTIME_SHFT)
31#define FUNNEL_ENSx_MASK 0xff
32
33DEFINE_CORESIGHT_DEVLIST(funnel_devs, "funnel");
34
35/**
36 * struct funnel_drvdata - specifics associated to a funnel component
37 * @base: memory mapped base address for this component.
38 * @atclk: optional clock for the core parts of the funnel.
39 * @csdev: component vitals needed by the framework.
40 * @priority: port selection order.
41 * @spinlock: serialize enable/disable operations.
42 */
43struct funnel_drvdata {
44 void __iomem *base;
45 struct clk *atclk;
46 struct coresight_device *csdev;
47 unsigned long priority;
48 spinlock_t spinlock;
49};
50
51static int dynamic_funnel_enable_hw(struct funnel_drvdata *drvdata, int port)
52{
53 u32 functl;
54 int rc = 0;
55 struct coresight_device *csdev = drvdata->csdev;
56
57 CS_UNLOCK(drvdata->base);
58
59 functl = readl_relaxed(drvdata->base + FUNNEL_FUNCTL);
60 /* Claim the device only when we enable the first slave */
61 if (!(functl & FUNNEL_ENSx_MASK)) {
62 rc = coresight_claim_device_unlocked(csdev);
63 if (rc)
64 goto done;
65 }
66
67 functl &= ~FUNNEL_HOLDTIME_MASK;
68 functl |= FUNNEL_HOLDTIME;
69 functl |= (1 << port);
70 writel_relaxed(functl, drvdata->base + FUNNEL_FUNCTL);
71 writel_relaxed(drvdata->priority, drvdata->base + FUNNEL_PRICTL);
72done:
73 CS_LOCK(drvdata->base);
74 return rc;
75}
76
77static int funnel_enable(struct coresight_device *csdev, int inport,
78 int outport)
79{
80 int rc = 0;
81 struct funnel_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
82 unsigned long flags;
83 bool first_enable = false;
84
85 spin_lock_irqsave(&drvdata->spinlock, flags);
86 if (atomic_read(&csdev->refcnt[inport]) == 0) {
87 if (drvdata->base)
88 rc = dynamic_funnel_enable_hw(drvdata, inport);
89 if (!rc)
90 first_enable = true;
91 }
92 if (!rc)
93 atomic_inc(&csdev->refcnt[inport]);
94 spin_unlock_irqrestore(&drvdata->spinlock, flags);
95
96 if (first_enable)
97 dev_dbg(&csdev->dev, "FUNNEL inport %d enabled\n", inport);
98 return rc;
99}
100
101static void dynamic_funnel_disable_hw(struct funnel_drvdata *drvdata,
102 int inport)
103{
104 u32 functl;
105 struct coresight_device *csdev = drvdata->csdev;
106
107 CS_UNLOCK(drvdata->base);
108
109 functl = readl_relaxed(drvdata->base + FUNNEL_FUNCTL);
110 functl &= ~(1 << inport);
111 writel_relaxed(functl, drvdata->base + FUNNEL_FUNCTL);
112
113 /* Disclaim the device if none of the slaves are now active */
114 if (!(functl & FUNNEL_ENSx_MASK))
115 coresight_disclaim_device_unlocked(csdev);
116
117 CS_LOCK(drvdata->base);
118}
119
120static void funnel_disable(struct coresight_device *csdev, int inport,
121 int outport)
122{
123 struct funnel_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
124 unsigned long flags;
125 bool last_disable = false;
126
127 spin_lock_irqsave(&drvdata->spinlock, flags);
128 if (atomic_dec_return(&csdev->refcnt[inport]) == 0) {
129 if (drvdata->base)
130 dynamic_funnel_disable_hw(drvdata, inport);
131 last_disable = true;
132 }
133 spin_unlock_irqrestore(&drvdata->spinlock, flags);
134
135 if (last_disable)
136 dev_dbg(&csdev->dev, "FUNNEL inport %d disabled\n", inport);
137}
138
139static const struct coresight_ops_link funnel_link_ops = {
140 .enable = funnel_enable,
141 .disable = funnel_disable,
142};
143
144static const struct coresight_ops funnel_cs_ops = {
145 .link_ops = &funnel_link_ops,
146};
147
148static ssize_t priority_show(struct device *dev,
149 struct device_attribute *attr, char *buf)
150{
151 struct funnel_drvdata *drvdata = dev_get_drvdata(dev->parent);
152 unsigned long val = drvdata->priority;
153
154 return sprintf(buf, "%#lx\n", val);
155}
156
157static ssize_t priority_store(struct device *dev,
158 struct device_attribute *attr,
159 const char *buf, size_t size)
160{
161 int ret;
162 unsigned long val;
163 struct funnel_drvdata *drvdata = dev_get_drvdata(dev->parent);
164
165 ret = kstrtoul(buf, 16, &val);
166 if (ret)
167 return ret;
168
169 drvdata->priority = val;
170 return size;
171}
172static DEVICE_ATTR_RW(priority);
173
174static u32 get_funnel_ctrl_hw(struct funnel_drvdata *drvdata)
175{
176 u32 functl;
177
178 CS_UNLOCK(drvdata->base);
179 functl = readl_relaxed(drvdata->base + FUNNEL_FUNCTL);
180 CS_LOCK(drvdata->base);
181
182 return functl;
183}
184
185static ssize_t funnel_ctrl_show(struct device *dev,
186 struct device_attribute *attr, char *buf)
187{
188 u32 val;
189 struct funnel_drvdata *drvdata = dev_get_drvdata(dev->parent);
190
191 pm_runtime_get_sync(dev->parent);
192
193 val = get_funnel_ctrl_hw(drvdata);
194
195 pm_runtime_put(dev->parent);
196
197 return sprintf(buf, "%#x\n", val);
198}
199static DEVICE_ATTR_RO(funnel_ctrl);
200
201static struct attribute *coresight_funnel_attrs[] = {
202 &dev_attr_funnel_ctrl.attr,
203 &dev_attr_priority.attr,
204 NULL,
205};
206ATTRIBUTE_GROUPS(coresight_funnel);
207
208static int funnel_probe(struct device *dev, struct resource *res)
209{
210 int ret;
211 void __iomem *base;
212 struct coresight_platform_data *pdata = NULL;
213 struct funnel_drvdata *drvdata;
214 struct coresight_desc desc = { 0 };
215
216 if (is_of_node(dev_fwnode(dev)) &&
217 of_device_is_compatible(dev->of_node, "arm,coresight-funnel"))
218 dev_warn_once(dev, "Uses OBSOLETE CoreSight funnel binding\n");
219
220 desc.name = coresight_alloc_device_name(&funnel_devs, dev);
221 if (!desc.name)
222 return -ENOMEM;
223
224 drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
225 if (!drvdata)
226 return -ENOMEM;
227
228 drvdata->atclk = devm_clk_get(dev, "atclk"); /* optional */
229 if (!IS_ERR(drvdata->atclk)) {
230 ret = clk_prepare_enable(drvdata->atclk);
231 if (ret)
232 return ret;
233 }
234
235 /*
236 * Map the device base for dynamic-funnel, which has been
237 * validated by AMBA core.
238 */
239 if (res) {
240 base = devm_ioremap_resource(dev, res);
241 if (IS_ERR(base)) {
242 ret = PTR_ERR(base);
243 goto out_disable_clk;
244 }
245 drvdata->base = base;
246 desc.groups = coresight_funnel_groups;
247 desc.access = CSDEV_ACCESS_IOMEM(base);
248 }
249
250 dev_set_drvdata(dev, drvdata);
251
252 pdata = coresight_get_platform_data(dev);
253 if (IS_ERR(pdata)) {
254 ret = PTR_ERR(pdata);
255 goto out_disable_clk;
256 }
257 dev->platform_data = pdata;
258
259 spin_lock_init(&drvdata->spinlock);
260 desc.type = CORESIGHT_DEV_TYPE_LINK;
261 desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_MERG;
262 desc.ops = &funnel_cs_ops;
263 desc.pdata = pdata;
264 desc.dev = dev;
265 drvdata->csdev = coresight_register(&desc);
266 if (IS_ERR(drvdata->csdev)) {
267 ret = PTR_ERR(drvdata->csdev);
268 goto out_disable_clk;
269 }
270
271 pm_runtime_put(dev);
272 ret = 0;
273
274out_disable_clk:
275 if (ret && !IS_ERR_OR_NULL(drvdata->atclk))
276 clk_disable_unprepare(drvdata->atclk);
277 return ret;
278}
279
280static int funnel_remove(struct device *dev)
281{
282 struct funnel_drvdata *drvdata = dev_get_drvdata(dev);
283
284 coresight_unregister(drvdata->csdev);
285
286 return 0;
287}
288
289#ifdef CONFIG_PM
290static int funnel_runtime_suspend(struct device *dev)
291{
292 struct funnel_drvdata *drvdata = dev_get_drvdata(dev);
293
294 if (drvdata && !IS_ERR(drvdata->atclk))
295 clk_disable_unprepare(drvdata->atclk);
296
297 return 0;
298}
299
300static int funnel_runtime_resume(struct device *dev)
301{
302 struct funnel_drvdata *drvdata = dev_get_drvdata(dev);
303
304 if (drvdata && !IS_ERR(drvdata->atclk))
305 clk_prepare_enable(drvdata->atclk);
306
307 return 0;
308}
309#endif
310
311static const struct dev_pm_ops funnel_dev_pm_ops = {
312 SET_RUNTIME_PM_OPS(funnel_runtime_suspend, funnel_runtime_resume, NULL)
313};
314
315static int static_funnel_probe(struct platform_device *pdev)
316{
317 int ret;
318
319 pm_runtime_get_noresume(&pdev->dev);
320 pm_runtime_set_active(&pdev->dev);
321 pm_runtime_enable(&pdev->dev);
322
323 /* Static funnel do not have programming base */
324 ret = funnel_probe(&pdev->dev, NULL);
325
326 if (ret) {
327 pm_runtime_put_noidle(&pdev->dev);
328 pm_runtime_disable(&pdev->dev);
329 }
330
331 return ret;
332}
333
334static int static_funnel_remove(struct platform_device *pdev)
335{
336 funnel_remove(&pdev->dev);
337 pm_runtime_disable(&pdev->dev);
338 return 0;
339}
340
341static const struct of_device_id static_funnel_match[] = {
342 {.compatible = "arm,coresight-static-funnel"},
343 {}
344};
345
346MODULE_DEVICE_TABLE(of, static_funnel_match);
347
348#ifdef CONFIG_ACPI
349static const struct acpi_device_id static_funnel_ids[] = {
350 {"ARMHC9FE", 0},
351 {},
352};
353
354MODULE_DEVICE_TABLE(acpi, static_funnel_ids);
355#endif
356
357static struct platform_driver static_funnel_driver = {
358 .probe = static_funnel_probe,
359 .remove = static_funnel_remove,
360 .driver = {
361 .name = "coresight-static-funnel",
362 /* THIS_MODULE is taken care of by platform_driver_register() */
363 .of_match_table = static_funnel_match,
364 .acpi_match_table = ACPI_PTR(static_funnel_ids),
365 .pm = &funnel_dev_pm_ops,
366 .suppress_bind_attrs = true,
367 },
368};
369
370static int dynamic_funnel_probe(struct amba_device *adev,
371 const struct amba_id *id)
372{
373 return funnel_probe(&adev->dev, &adev->res);
374}
375
376static void dynamic_funnel_remove(struct amba_device *adev)
377{
378 funnel_remove(&adev->dev);
379}
380
381static const struct amba_id dynamic_funnel_ids[] = {
382 {
383 .id = 0x000bb908,
384 .mask = 0x000fffff,
385 },
386 {
387 /* Coresight SoC-600 */
388 .id = 0x000bb9eb,
389 .mask = 0x000fffff,
390 },
391 { 0, 0},
392};
393
394MODULE_DEVICE_TABLE(amba, dynamic_funnel_ids);
395
396static struct amba_driver dynamic_funnel_driver = {
397 .drv = {
398 .name = "coresight-dynamic-funnel",
399 .owner = THIS_MODULE,
400 .pm = &funnel_dev_pm_ops,
401 .suppress_bind_attrs = true,
402 },
403 .probe = dynamic_funnel_probe,
404 .remove = dynamic_funnel_remove,
405 .id_table = dynamic_funnel_ids,
406};
407
408static int __init funnel_init(void)
409{
410 int ret;
411
412 ret = platform_driver_register(&static_funnel_driver);
413 if (ret) {
414 pr_info("Error registering platform driver\n");
415 return ret;
416 }
417
418 ret = amba_driver_register(&dynamic_funnel_driver);
419 if (ret) {
420 pr_info("Error registering amba driver\n");
421 platform_driver_unregister(&static_funnel_driver);
422 }
423
424 return ret;
425}
426
427static void __exit funnel_exit(void)
428{
429 platform_driver_unregister(&static_funnel_driver);
430 amba_driver_unregister(&dynamic_funnel_driver);
431}
432
433module_init(funnel_init);
434module_exit(funnel_exit);
435
436MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
437MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
438MODULE_DESCRIPTION("Arm CoreSight Funnel Driver");
439MODULE_LICENSE("GPL v2");