1// SPDX-License-Identifier: GPL-2.0
  2/* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
  3/* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */
  4
  5#include <linux/clk.h>
  6#include <linux/reset.h>
  7#include <linux/platform_device.h>
  8#include <linux/regulator/consumer.h>
  9
 10#include "panfrost_device.h"
 11#include "panfrost_devfreq.h"
 12#include "panfrost_features.h"
 13#include "panfrost_gpu.h"
 14#include "panfrost_job.h"
 15#include "panfrost_mmu.h"
 16#include "panfrost_perfcnt.h"
 17
 18static int panfrost_reset_init(struct panfrost_device *pfdev)
 19{
 20	int err;
 21
 22	pfdev->rstc = devm_reset_control_array_get(pfdev->dev, false, true);
 23	if (IS_ERR(pfdev->rstc)) {
 24		dev_err(pfdev->dev, "get reset failed %ld\n", PTR_ERR(pfdev->rstc));
 25		return PTR_ERR(pfdev->rstc);
 26	}
 27
 28	err = reset_control_deassert(pfdev->rstc);
 29	if (err)
 30		return err;
 31
 32	return 0;
 33}
 34
 35static void panfrost_reset_fini(struct panfrost_device *pfdev)
 36{
 37	reset_control_assert(pfdev->rstc);
 38}
 39
 40static int panfrost_clk_init(struct panfrost_device *pfdev)
 41{
 42	int err;
 43	unsigned long rate;
 44
 45	pfdev->clock = devm_clk_get(pfdev->dev, NULL);
 46	if (IS_ERR(pfdev->clock)) {
 47		dev_err(pfdev->dev, "get clock failed %ld\n", PTR_ERR(pfdev->clock));
 48		return PTR_ERR(pfdev->clock);
 49	}
 50
 51	rate = clk_get_rate(pfdev->clock);
 52	dev_info(pfdev->dev, "clock rate = %lu\n", rate);
 53
 54	err = clk_prepare_enable(pfdev->clock);
 55	if (err)
 56		return err;
 57
 58	pfdev->bus_clock = devm_clk_get_optional(pfdev->dev, "bus");
 59	if (IS_ERR(pfdev->bus_clock)) {
 60		dev_err(pfdev->dev, "get bus_clock failed %ld\n",
 61			PTR_ERR(pfdev->bus_clock));
 62		return PTR_ERR(pfdev->bus_clock);
 63	}
 64
 65	if (pfdev->bus_clock) {
 66		rate = clk_get_rate(pfdev->bus_clock);
 67		dev_info(pfdev->dev, "bus_clock rate = %lu\n", rate);
 68
 69		err = clk_prepare_enable(pfdev->bus_clock);
 70		if (err)
 71			goto disable_clock;
 72	}
 73
 74	return 0;
 75
 76disable_clock:
 77	clk_disable_unprepare(pfdev->clock);
 78
 79	return err;
 80}
 81
 82static void panfrost_clk_fini(struct panfrost_device *pfdev)
 83{
 84	clk_disable_unprepare(pfdev->bus_clock);
 85	clk_disable_unprepare(pfdev->clock);
 86}
 87
 88static int panfrost_regulator_init(struct panfrost_device *pfdev)
 89{
 90	int ret;
 91
 92	pfdev->regulator = devm_regulator_get(pfdev->dev, "mali");
 93	if (IS_ERR(pfdev->regulator)) {
 94		ret = PTR_ERR(pfdev->regulator);
 95		dev_err(pfdev->dev, "failed to get regulator: %d\n", ret);
 96		return ret;
 97	}
 98
 99	ret = regulator_enable(pfdev->regulator);
100	if (ret < 0) {
101		dev_err(pfdev->dev, "failed to enable regulator: %d\n", ret);
102		return ret;
103	}
104
105	return 0;
106}
107
108static void panfrost_regulator_fini(struct panfrost_device *pfdev)
109{
110	regulator_disable(pfdev->regulator);
111}
112
113int panfrost_device_init(struct panfrost_device *pfdev)
114{
115	int err;
116	struct resource *res;
117
118	mutex_init(&pfdev->sched_lock);
119	mutex_init(&pfdev->reset_lock);
120	INIT_LIST_HEAD(&pfdev->scheduled_jobs);
121	INIT_LIST_HEAD(&pfdev->as_lru_list);
122
123	spin_lock_init(&pfdev->as_lock);
124
125	err = panfrost_clk_init(pfdev);
126	if (err) {
127		dev_err(pfdev->dev, "clk init failed %d\n", err);
128		return err;
129	}
130
131	err = panfrost_regulator_init(pfdev);
132	if (err) {
133		dev_err(pfdev->dev, "regulator init failed %d\n", err);
134		goto err_out0;
135	}
136
137	err = panfrost_reset_init(pfdev);
138	if (err) {
139		dev_err(pfdev->dev, "reset init failed %d\n", err);
140		goto err_out1;
141	}
142
143	res = platform_get_resource(pfdev->pdev, IORESOURCE_MEM, 0);
144	pfdev->iomem = devm_ioremap_resource(pfdev->dev, res);
145	if (IS_ERR(pfdev->iomem)) {
146		dev_err(pfdev->dev, "failed to ioremap iomem\n");
147		err = PTR_ERR(pfdev->iomem);
148		goto err_out2;
149	}
150
151	err = panfrost_gpu_init(pfdev);
152	if (err)
153		goto err_out2;
154
155	err = panfrost_mmu_init(pfdev);
156	if (err)
157		goto err_out3;
158
159	err = panfrost_job_init(pfdev);
160	if (err)
161		goto err_out4;
162
163	err = panfrost_perfcnt_init(pfdev);
164	if (err)
165		goto err_out5;
166
167	return 0;
168err_out5:
169	panfrost_job_fini(pfdev);
170err_out4:
171	panfrost_mmu_fini(pfdev);
172err_out3:
173	panfrost_gpu_fini(pfdev);
174err_out2:
175	panfrost_reset_fini(pfdev);
176err_out1:
177	panfrost_regulator_fini(pfdev);
178err_out0:
179	panfrost_clk_fini(pfdev);
180	return err;
181}
182
183void panfrost_device_fini(struct panfrost_device *pfdev)
184{
185	panfrost_perfcnt_fini(pfdev);
186	panfrost_job_fini(pfdev);
187	panfrost_mmu_fini(pfdev);
188	panfrost_gpu_fini(pfdev);
189	panfrost_reset_fini(pfdev);
190	panfrost_regulator_fini(pfdev);
191	panfrost_clk_fini(pfdev);
192}
193
194const char *panfrost_exception_name(struct panfrost_device *pfdev, u32 exception_code)
195{
196	switch (exception_code) {
197		/* Non-Fault Status code */
198	case 0x00: return "NOT_STARTED/IDLE/OK";
199	case 0x01: return "DONE";
200	case 0x02: return "INTERRUPTED";
201	case 0x03: return "STOPPED";
202	case 0x04: return "TERMINATED";
203	case 0x08: return "ACTIVE";
204		/* Job exceptions */
205	case 0x40: return "JOB_CONFIG_FAULT";
206	case 0x41: return "JOB_POWER_FAULT";
207	case 0x42: return "JOB_READ_FAULT";
208	case 0x43: return "JOB_WRITE_FAULT";
209	case 0x44: return "JOB_AFFINITY_FAULT";
210	case 0x48: return "JOB_BUS_FAULT";
211	case 0x50: return "INSTR_INVALID_PC";
212	case 0x51: return "INSTR_INVALID_ENC";
213	case 0x52: return "INSTR_TYPE_MISMATCH";
214	case 0x53: return "INSTR_OPERAND_FAULT";
215	case 0x54: return "INSTR_TLS_FAULT";
216	case 0x55: return "INSTR_BARRIER_FAULT";
217	case 0x56: return "INSTR_ALIGN_FAULT";
218	case 0x58: return "DATA_INVALID_FAULT";
219	case 0x59: return "TILE_RANGE_FAULT";
220	case 0x5A: return "ADDR_RANGE_FAULT";
221	case 0x60: return "OUT_OF_MEMORY";
222		/* GPU exceptions */
223	case 0x80: return "DELAYED_BUS_FAULT";
224	case 0x88: return "SHAREABILITY_FAULT";
225		/* MMU exceptions */
226	case 0xC1: return "TRANSLATION_FAULT_LEVEL1";
227	case 0xC2: return "TRANSLATION_FAULT_LEVEL2";
228	case 0xC3: return "TRANSLATION_FAULT_LEVEL3";
229	case 0xC4: return "TRANSLATION_FAULT_LEVEL4";
230	case 0xC8: return "PERMISSION_FAULT";
231	case 0xC9 ... 0xCF: return "PERMISSION_FAULT";
232	case 0xD1: return "TRANSTAB_BUS_FAULT_LEVEL1";
233	case 0xD2: return "TRANSTAB_BUS_FAULT_LEVEL2";
234	case 0xD3: return "TRANSTAB_BUS_FAULT_LEVEL3";
235	case 0xD4: return "TRANSTAB_BUS_FAULT_LEVEL4";
236	case 0xD8: return "ACCESS_FLAG";
237	case 0xD9 ... 0xDF: return "ACCESS_FLAG";
238	case 0xE0 ... 0xE7: return "ADDRESS_SIZE_FAULT";
239	case 0xE8 ... 0xEF: return "MEMORY_ATTRIBUTES_FAULT";
240	}
241
242	return "UNKNOWN";
243}
244
245void panfrost_device_reset(struct panfrost_device *pfdev)
246{
247	panfrost_gpu_soft_reset(pfdev);
248
249	panfrost_gpu_power_on(pfdev);
250	panfrost_mmu_reset(pfdev);
251	panfrost_job_enable_interrupts(pfdev);
252}
253
254#ifdef CONFIG_PM
255int panfrost_device_resume(struct device *dev)
256{
257	struct platform_device *pdev = to_platform_device(dev);
258	struct panfrost_device *pfdev = platform_get_drvdata(pdev);
259
260	panfrost_device_reset(pfdev);
261	panfrost_devfreq_resume(pfdev);
262
263	return 0;
264}
265
266int panfrost_device_suspend(struct device *dev)
267{
268	struct platform_device *pdev = to_platform_device(dev);
269	struct panfrost_device *pfdev = platform_get_drvdata(pdev);
270
271	if (!panfrost_job_is_idle(pfdev))
272		return -EBUSY;
273
274	panfrost_devfreq_suspend(pfdev);
275	panfrost_gpu_power_off(pfdev);
276
277	return 0;
278}
279#endif