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1/*
2 * Copyright (C) 2012 Russell King
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8#include <linux/clk.h>
9#include <linux/module.h>
10#include <drm/drmP.h>
11#include <drm/drm_crtc_helper.h>
12#include "armada_crtc.h"
13#include "armada_drm.h"
14#include "armada_gem.h"
15#include "armada_hw.h"
16#include <drm/armada_drm.h>
17#include "armada_ioctlP.h"
18
19#ifdef CONFIG_DRM_ARMADA_TDA1998X
20#include <drm/i2c/tda998x.h>
21#include "armada_slave.h"
22
23static struct tda998x_encoder_params params = {
24 /* With 0x24, there is no translation between vp_out and int_vp
25 FB LCD out Pins VIP Int Vp
26 R:23:16 R:7:0 VPC7:0 7:0 7:0[R]
27 G:15:8 G:15:8 VPB7:0 23:16 23:16[G]
28 B:7:0 B:23:16 VPA7:0 15:8 15:8[B]
29 */
30 .swap_a = 2,
31 .swap_b = 3,
32 .swap_c = 4,
33 .swap_d = 5,
34 .swap_e = 0,
35 .swap_f = 1,
36 .audio_cfg = BIT(2),
37 .audio_frame[1] = 1,
38 .audio_format = AFMT_SPDIF,
39 .audio_sample_rate = 44100,
40};
41
42static const struct armada_drm_slave_config tda19988_config = {
43 .i2c_adapter_id = 0,
44 .crtcs = 1 << 0, /* Only LCD0 at the moment */
45 .polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT,
46 .interlace_allowed = true,
47 .info = {
48 .type = "tda998x",
49 .addr = 0x70,
50 .platform_data = ¶ms,
51 },
52};
53#endif
54
55static void armada_drm_unref_work(struct work_struct *work)
56{
57 struct armada_private *priv =
58 container_of(work, struct armada_private, fb_unref_work);
59 struct drm_framebuffer *fb;
60
61 while (kfifo_get(&priv->fb_unref, &fb))
62 drm_framebuffer_unreference(fb);
63}
64
65/* Must be called with dev->event_lock held */
66void __armada_drm_queue_unref_work(struct drm_device *dev,
67 struct drm_framebuffer *fb)
68{
69 struct armada_private *priv = dev->dev_private;
70
71 WARN_ON(!kfifo_put(&priv->fb_unref, fb));
72 schedule_work(&priv->fb_unref_work);
73}
74
75void armada_drm_queue_unref_work(struct drm_device *dev,
76 struct drm_framebuffer *fb)
77{
78 unsigned long flags;
79
80 spin_lock_irqsave(&dev->event_lock, flags);
81 __armada_drm_queue_unref_work(dev, fb);
82 spin_unlock_irqrestore(&dev->event_lock, flags);
83}
84
85static int armada_drm_load(struct drm_device *dev, unsigned long flags)
86{
87 const struct platform_device_id *id;
88 struct armada_private *priv;
89 struct resource *res[ARRAY_SIZE(priv->dcrtc)];
90 struct resource *mem = NULL;
91 int ret, n, i;
92
93 memset(res, 0, sizeof(res));
94
95 for (n = i = 0; ; n++) {
96 struct resource *r = platform_get_resource(dev->platformdev,
97 IORESOURCE_MEM, n);
98 if (!r)
99 break;
100
101 /* Resources above 64K are graphics memory */
102 if (resource_size(r) > SZ_64K)
103 mem = r;
104 else if (i < ARRAY_SIZE(priv->dcrtc))
105 res[i++] = r;
106 else
107 return -EINVAL;
108 }
109
110 if (!res[0] || !mem)
111 return -ENXIO;
112
113 if (!devm_request_mem_region(dev->dev, mem->start,
114 resource_size(mem), "armada-drm"))
115 return -EBUSY;
116
117 priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
118 if (!priv) {
119 DRM_ERROR("failed to allocate private\n");
120 return -ENOMEM;
121 }
122
123 platform_set_drvdata(dev->platformdev, dev);
124 dev->dev_private = priv;
125
126 /* Get the implementation specific driver data. */
127 id = platform_get_device_id(dev->platformdev);
128 if (!id)
129 return -ENXIO;
130
131 priv->variant = (struct armada_variant *)id->driver_data;
132
133 ret = priv->variant->init(priv, dev->dev);
134 if (ret)
135 return ret;
136
137 INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
138 INIT_KFIFO(priv->fb_unref);
139
140 /* Mode setting support */
141 drm_mode_config_init(dev);
142 dev->mode_config.min_width = 320;
143 dev->mode_config.min_height = 200;
144
145 /*
146 * With vscale enabled, the maximum width is 1920 due to the
147 * 1920 by 3 lines RAM
148 */
149 dev->mode_config.max_width = 1920;
150 dev->mode_config.max_height = 2048;
151
152 dev->mode_config.preferred_depth = 24;
153 dev->mode_config.funcs = &armada_drm_mode_config_funcs;
154 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
155
156 /* Create all LCD controllers */
157 for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
158 if (!res[n])
159 break;
160
161 ret = armada_drm_crtc_create(dev, n, res[n]);
162 if (ret)
163 goto err_kms;
164 }
165
166#ifdef CONFIG_DRM_ARMADA_TDA1998X
167 ret = armada_drm_connector_slave_create(dev, &tda19988_config);
168 if (ret)
169 goto err_kms;
170#endif
171
172 ret = drm_vblank_init(dev, n);
173 if (ret)
174 goto err_kms;
175
176 ret = drm_irq_install(dev);
177 if (ret)
178 goto err_kms;
179
180 dev->vblank_disable_allowed = 1;
181
182 ret = armada_fbdev_init(dev);
183 if (ret)
184 goto err_irq;
185
186 drm_kms_helper_poll_init(dev);
187
188 return 0;
189
190 err_irq:
191 drm_irq_uninstall(dev);
192 err_kms:
193 drm_mode_config_cleanup(dev);
194 drm_mm_takedown(&priv->linear);
195 flush_work(&priv->fb_unref_work);
196
197 return ret;
198}
199
200static int armada_drm_unload(struct drm_device *dev)
201{
202 struct armada_private *priv = dev->dev_private;
203
204 drm_kms_helper_poll_fini(dev);
205 armada_fbdev_fini(dev);
206 drm_irq_uninstall(dev);
207 drm_mode_config_cleanup(dev);
208 drm_mm_takedown(&priv->linear);
209 flush_work(&priv->fb_unref_work);
210 dev->dev_private = NULL;
211
212 return 0;
213}
214
215void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
216 struct armada_vbl_event *evt)
217{
218 unsigned long flags;
219
220 spin_lock_irqsave(&dcrtc->irq_lock, flags);
221 if (list_empty(&evt->node)) {
222 list_add_tail(&evt->node, &dcrtc->vbl_list);
223
224 drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
225 }
226 spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
227}
228
229void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
230 struct armada_vbl_event *evt)
231{
232 if (!list_empty(&evt->node)) {
233 list_del_init(&evt->node);
234 drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
235 }
236}
237
238void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc,
239 struct armada_vbl_event *evt)
240{
241 unsigned long flags;
242
243 spin_lock_irqsave(&dcrtc->irq_lock, flags);
244 armada_drm_vbl_event_remove(dcrtc, evt);
245 spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
246}
247
248/* These are called under the vbl_lock. */
249static int armada_drm_enable_vblank(struct drm_device *dev, int crtc)
250{
251 struct armada_private *priv = dev->dev_private;
252 armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
253 return 0;
254}
255
256static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
257{
258 struct armada_private *priv = dev->dev_private;
259 armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
260}
261
262static irqreturn_t armada_drm_irq_handler(int irq, void *arg)
263{
264 struct drm_device *dev = arg;
265 struct armada_private *priv = dev->dev_private;
266 struct armada_crtc *dcrtc = priv->dcrtc[0];
267 uint32_t v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
268 irqreturn_t handled = IRQ_NONE;
269
270 /*
271 * This is rediculous - rather than writing bits to clear, we
272 * have to set the actual status register value. This is racy.
273 */
274 writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
275
276 /* Mask out those interrupts we haven't enabled */
277 v = stat & dcrtc->irq_ena;
278
279 if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) {
280 armada_drm_crtc_irq(dcrtc, stat);
281 handled = IRQ_HANDLED;
282 }
283
284 return handled;
285}
286
287static int armada_drm_irq_postinstall(struct drm_device *dev)
288{
289 struct armada_private *priv = dev->dev_private;
290 struct armada_crtc *dcrtc = priv->dcrtc[0];
291
292 spin_lock_irq(&dev->vbl_lock);
293 writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
294 writel(0, dcrtc->base + LCD_SPU_IRQ_ISR);
295 spin_unlock_irq(&dev->vbl_lock);
296
297 return 0;
298}
299
300static void armada_drm_irq_uninstall(struct drm_device *dev)
301{
302 struct armada_private *priv = dev->dev_private;
303 struct armada_crtc *dcrtc = priv->dcrtc[0];
304
305 writel(0, dcrtc->base + LCD_SPU_IRQ_ENA);
306}
307
308static struct drm_ioctl_desc armada_ioctls[] = {
309 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
310 DRM_UNLOCKED),
311 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl,
312 DRM_UNLOCKED),
313 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl,
314 DRM_UNLOCKED),
315};
316
317static void armada_drm_lastclose(struct drm_device *dev)
318{
319 armada_fbdev_lastclose(dev);
320}
321
322static const struct file_operations armada_drm_fops = {
323 .owner = THIS_MODULE,
324 .llseek = no_llseek,
325 .read = drm_read,
326 .poll = drm_poll,
327 .unlocked_ioctl = drm_ioctl,
328 .mmap = drm_gem_mmap,
329 .open = drm_open,
330 .release = drm_release,
331};
332
333static struct drm_driver armada_drm_driver = {
334 .load = armada_drm_load,
335 .open = NULL,
336 .preclose = NULL,
337 .postclose = NULL,
338 .lastclose = armada_drm_lastclose,
339 .unload = armada_drm_unload,
340 .get_vblank_counter = drm_vblank_count,
341 .enable_vblank = armada_drm_enable_vblank,
342 .disable_vblank = armada_drm_disable_vblank,
343 .irq_handler = armada_drm_irq_handler,
344 .irq_postinstall = armada_drm_irq_postinstall,
345 .irq_uninstall = armada_drm_irq_uninstall,
346#ifdef CONFIG_DEBUG_FS
347 .debugfs_init = armada_drm_debugfs_init,
348 .debugfs_cleanup = armada_drm_debugfs_cleanup,
349#endif
350 .gem_free_object = armada_gem_free_object,
351 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
352 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
353 .gem_prime_export = armada_gem_prime_export,
354 .gem_prime_import = armada_gem_prime_import,
355 .dumb_create = armada_gem_dumb_create,
356 .dumb_map_offset = armada_gem_dumb_map_offset,
357 .dumb_destroy = armada_gem_dumb_destroy,
358 .gem_vm_ops = &armada_gem_vm_ops,
359 .major = 1,
360 .minor = 0,
361 .name = "armada-drm",
362 .desc = "Armada SoC DRM",
363 .date = "20120730",
364 .driver_features = DRIVER_GEM | DRIVER_MODESET |
365 DRIVER_HAVE_IRQ | DRIVER_PRIME,
366 .ioctls = armada_ioctls,
367 .fops = &armada_drm_fops,
368};
369
370static int armada_drm_probe(struct platform_device *pdev)
371{
372 return drm_platform_init(&armada_drm_driver, pdev);
373}
374
375static int armada_drm_remove(struct platform_device *pdev)
376{
377 drm_put_dev(platform_get_drvdata(pdev));
378 return 0;
379}
380
381static const struct platform_device_id armada_drm_platform_ids[] = {
382 {
383 .name = "armada-drm",
384 .driver_data = (unsigned long)&armada510_ops,
385 }, {
386 .name = "armada-510-drm",
387 .driver_data = (unsigned long)&armada510_ops,
388 },
389 { },
390};
391MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
392
393static struct platform_driver armada_drm_platform_driver = {
394 .probe = armada_drm_probe,
395 .remove = armada_drm_remove,
396 .driver = {
397 .name = "armada-drm",
398 .owner = THIS_MODULE,
399 },
400 .id_table = armada_drm_platform_ids,
401};
402
403static int __init armada_drm_init(void)
404{
405 armada_drm_driver.num_ioctls = DRM_ARRAY_SIZE(armada_ioctls);
406 return platform_driver_register(&armada_drm_platform_driver);
407}
408module_init(armada_drm_init);
409
410static void __exit armada_drm_exit(void)
411{
412 platform_driver_unregister(&armada_drm_platform_driver);
413}
414module_exit(armada_drm_exit);
415
416MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
417MODULE_DESCRIPTION("Armada DRM Driver");
418MODULE_LICENSE("GPL");
419MODULE_ALIAS("platform:armada-drm");