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7#include <linux/io.h>
8#include <linux/iommu.h>
9#include <linux/of_device.h>
10#include <linux/of_graph.h>
11#include <linux/of_reserved_mem.h>
12#include <linux/platform_device.h>
13#include <linux/dma-mapping.h>
14#ifdef CONFIG_DEBUG_FS
15#include <linux/debugfs.h>
16#include <linux/seq_file.h>
17#endif
18
19#include <drm/drm_print.h>
20
21#include "komeda_dev.h"
22
23static int komeda_register_show(struct seq_file *sf, void *x)
24{
25 struct komeda_dev *mdev = sf->private;
26 int i;
27
28 if (mdev->funcs->dump_register)
29 mdev->funcs->dump_register(mdev, sf);
30
31 for (i = 0; i < mdev->n_pipelines; i++)
32 komeda_pipeline_dump_register(mdev->pipelines[i], sf);
33
34 return 0;
35}
36
37static int komeda_register_open(struct inode *inode, struct file *filp)
38{
39 return single_open(filp, komeda_register_show, inode->i_private);
40}
41
42static const struct file_operations komeda_register_fops = {
43 .owner = THIS_MODULE,
44 .open = komeda_register_open,
45 .read = seq_read,
46 .llseek = seq_lseek,
47 .release = single_release,
48};
49
50#ifdef CONFIG_DEBUG_FS
51static void komeda_debugfs_init(struct komeda_dev *mdev)
52{
53 if (!debugfs_initialized())
54 return;
55
56 mdev->debugfs_root = debugfs_create_dir("komeda", NULL);
57 debugfs_create_file("register", 0444, mdev->debugfs_root,
58 mdev, &komeda_register_fops);
59}
60#endif
61
62static ssize_t
63core_id_show(struct device *dev, struct device_attribute *attr, char *buf)
64{
65 struct komeda_dev *mdev = dev_to_mdev(dev);
66
67 return snprintf(buf, PAGE_SIZE, "0x%08x\n", mdev->chip.core_id);
68}
69static DEVICE_ATTR_RO(core_id);
70
71static ssize_t
72config_id_show(struct device *dev, struct device_attribute *attr, char *buf)
73{
74 struct komeda_dev *mdev = dev_to_mdev(dev);
75 struct komeda_pipeline *pipe = mdev->pipelines[0];
76 union komeda_config_id config_id;
77 int i;
78
79 memset(&config_id, 0, sizeof(config_id));
80
81 config_id.max_line_sz = pipe->layers[0]->hsize_in.end;
82 config_id.n_pipelines = mdev->n_pipelines;
83 config_id.n_scalers = pipe->n_scalers;
84 config_id.n_layers = pipe->n_layers;
85 config_id.n_richs = 0;
86 for (i = 0; i < pipe->n_layers; i++) {
87 if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER)
88 config_id.n_richs++;
89 }
90 return snprintf(buf, PAGE_SIZE, "0x%08x\n", config_id.value);
91}
92static DEVICE_ATTR_RO(config_id);
93
94static struct attribute *komeda_sysfs_entries[] = {
95 &dev_attr_core_id.attr,
96 &dev_attr_config_id.attr,
97 NULL,
98};
99
100static struct attribute_group komeda_sysfs_attr_group = {
101 .attrs = komeda_sysfs_entries,
102};
103
104static int komeda_parse_pipe_dt(struct komeda_dev *mdev, struct device_node *np)
105{
106 struct komeda_pipeline *pipe;
107 struct clk *clk;
108 u32 pipe_id;
109 int ret = 0;
110
111 ret = of_property_read_u32(np, "reg", &pipe_id);
112 if (ret != 0 || pipe_id >= mdev->n_pipelines)
113 return -EINVAL;
114
115 pipe = mdev->pipelines[pipe_id];
116
117 clk = of_clk_get_by_name(np, "pxclk");
118 if (IS_ERR(clk)) {
119 DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe_id);
120 return PTR_ERR(clk);
121 }
122 pipe->pxlclk = clk;
123
124
125 pipe->of_output_dev =
126 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0);
127 pipe->of_output_port =
128 of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT);
129
130 pipe->of_node = of_node_get(np);
131
132 return 0;
133}
134
135static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev)
136{
137 struct platform_device *pdev = to_platform_device(dev);
138 struct device_node *child, *np = dev->of_node;
139 int ret;
140
141 mdev->irq = platform_get_irq(pdev, 0);
142 if (mdev->irq < 0) {
143 DRM_ERROR("could not get IRQ number.\n");
144 return mdev->irq;
145 }
146
147
148 ret = of_reserved_mem_device_init(dev);
149 if (ret && ret != -ENODEV)
150 return ret;
151 ret = 0;
152
153 for_each_available_child_of_node(np, child) {
154 if (of_node_cmp(child->name, "pipeline") == 0) {
155 ret = komeda_parse_pipe_dt(mdev, child);
156 if (ret) {
157 DRM_ERROR("parse pipeline dt error!\n");
158 of_node_put(child);
159 break;
160 }
161 }
162 }
163
164 return ret;
165}
166
167struct komeda_dev *komeda_dev_create(struct device *dev)
168{
169 struct platform_device *pdev = to_platform_device(dev);
170 const struct komeda_product_data *product;
171 struct komeda_dev *mdev;
172 struct resource *io_res;
173 int err = 0;
174
175 product = of_device_get_match_data(dev);
176 if (!product)
177 return ERR_PTR(-ENODEV);
178
179 io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
180 if (!io_res) {
181 DRM_ERROR("No registers defined.\n");
182 return ERR_PTR(-ENODEV);
183 }
184
185 mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL);
186 if (!mdev)
187 return ERR_PTR(-ENOMEM);
188
189 mutex_init(&mdev->lock);
190
191 mdev->dev = dev;
192 mdev->reg_base = devm_ioremap_resource(dev, io_res);
193 if (IS_ERR(mdev->reg_base)) {
194 DRM_ERROR("Map register space failed.\n");
195 err = PTR_ERR(mdev->reg_base);
196 mdev->reg_base = NULL;
197 goto err_cleanup;
198 }
199
200 mdev->aclk = devm_clk_get(dev, "aclk");
201 if (IS_ERR(mdev->aclk)) {
202 DRM_ERROR("Get engine clk failed.\n");
203 err = PTR_ERR(mdev->aclk);
204 mdev->aclk = NULL;
205 goto err_cleanup;
206 }
207
208 clk_prepare_enable(mdev->aclk);
209
210 mdev->funcs = product->identify(mdev->reg_base, &mdev->chip);
211 if (!komeda_product_match(mdev, product->product_id)) {
212 DRM_ERROR("DT configured %x mismatch with real HW %x.\n",
213 product->product_id,
214 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id));
215 err = -ENODEV;
216 goto err_cleanup;
217 }
218
219 DRM_INFO("Found ARM Mali-D%x version r%dp%d\n",
220 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id),
221 MALIDP_CORE_ID_MAJOR(mdev->chip.core_id),
222 MALIDP_CORE_ID_MINOR(mdev->chip.core_id));
223
224 mdev->funcs->init_format_table(mdev);
225
226 err = mdev->funcs->enum_resources(mdev);
227 if (err) {
228 DRM_ERROR("enumerate display resource failed.\n");
229 goto err_cleanup;
230 }
231
232 err = komeda_parse_dt(dev, mdev);
233 if (err) {
234 DRM_ERROR("parse device tree failed.\n");
235 goto err_cleanup;
236 }
237
238 err = komeda_assemble_pipelines(mdev);
239 if (err) {
240 DRM_ERROR("assemble display pipelines failed.\n");
241 goto err_cleanup;
242 }
243
244 dev->dma_parms = &mdev->dma_parms;
245 dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
246
247 mdev->iommu = iommu_get_domain_for_dev(mdev->dev);
248 if (!mdev->iommu)
249 DRM_INFO("continue without IOMMU support!\n");
250
251 if (mdev->iommu && mdev->funcs->connect_iommu) {
252 err = mdev->funcs->connect_iommu(mdev);
253 if (err) {
254 mdev->iommu = NULL;
255 goto err_cleanup;
256 }
257 }
258
259 err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group);
260 if (err) {
261 DRM_ERROR("create sysfs group failed.\n");
262 goto err_cleanup;
263 }
264
265#ifdef CONFIG_DEBUG_FS
266 komeda_debugfs_init(mdev);
267#endif
268
269 return mdev;
270
271err_cleanup:
272 komeda_dev_destroy(mdev);
273 return ERR_PTR(err);
274}
275
276void komeda_dev_destroy(struct komeda_dev *mdev)
277{
278 struct device *dev = mdev->dev;
279 const struct komeda_dev_funcs *funcs = mdev->funcs;
280 int i;
281
282 sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group);
283
284#ifdef CONFIG_DEBUG_FS
285 debugfs_remove_recursive(mdev->debugfs_root);
286#endif
287
288 if (mdev->iommu && mdev->funcs->disconnect_iommu)
289 mdev->funcs->disconnect_iommu(mdev);
290 mdev->iommu = NULL;
291
292 for (i = 0; i < mdev->n_pipelines; i++) {
293 komeda_pipeline_destroy(mdev, mdev->pipelines[i]);
294 mdev->pipelines[i] = NULL;
295 }
296
297 mdev->n_pipelines = 0;
298
299 of_reserved_mem_device_release(dev);
300
301 if (funcs && funcs->cleanup)
302 funcs->cleanup(mdev);
303
304 if (mdev->reg_base) {
305 devm_iounmap(dev, mdev->reg_base);
306 mdev->reg_base = NULL;
307 }
308
309 if (mdev->aclk) {
310 clk_disable_unprepare(mdev->aclk);
311 devm_clk_put(dev, mdev->aclk);
312 mdev->aclk = NULL;
313 }
314
315 devm_kfree(dev, mdev);
316}
317
