Commit | Line | Data |
---|---|---|
51c13278 LP |
1 | /* |
2 | * shmob_drm_drv.c -- SH Mobile DRM driver | |
3 | * | |
4 | * Copyright (C) 2012 Renesas Corporation | |
5 | * | |
6 | * Laurent Pinchart (laurent.pinchart@ideasonboard.com) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/clk.h> | |
15 | #include <linux/io.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/platform_device.h> | |
19 | #include <linux/pm.h> | |
20 | #include <linux/slab.h> | |
21 | ||
22 | #include <drm/drmP.h> | |
23 | #include <drm/drm_crtc_helper.h> | |
24 | #include <drm/drm_gem_cma_helper.h> | |
25 | ||
26 | #include "shmob_drm_crtc.h" | |
27 | #include "shmob_drm_drv.h" | |
28 | #include "shmob_drm_kms.h" | |
29 | #include "shmob_drm_plane.h" | |
30 | #include "shmob_drm_regs.h" | |
31 | ||
32 | /* ----------------------------------------------------------------------------- | |
33 | * Hardware initialization | |
34 | */ | |
35 | ||
56550d94 | 36 | static int shmob_drm_init_interface(struct shmob_drm_device *sdev) |
51c13278 LP |
37 | { |
38 | static const u32 ldmt1r[] = { | |
39 | [SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8, | |
40 | [SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9, | |
41 | [SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A, | |
42 | [SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B, | |
43 | [SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16, | |
44 | [SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18, | |
45 | [SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24, | |
46 | [SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR, | |
47 | [SHMOB_DRM_IFACE_SYS8A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8A, | |
48 | [SHMOB_DRM_IFACE_SYS8B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8B, | |
49 | [SHMOB_DRM_IFACE_SYS8C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8C, | |
50 | [SHMOB_DRM_IFACE_SYS8D] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8D, | |
51 | [SHMOB_DRM_IFACE_SYS9] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS9, | |
52 | [SHMOB_DRM_IFACE_SYS12] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS12, | |
53 | [SHMOB_DRM_IFACE_SYS16A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16A, | |
54 | [SHMOB_DRM_IFACE_SYS16B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16B, | |
55 | [SHMOB_DRM_IFACE_SYS16C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16C, | |
56 | [SHMOB_DRM_IFACE_SYS18] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS18, | |
57 | [SHMOB_DRM_IFACE_SYS24] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS24, | |
58 | }; | |
59 | ||
60 | if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) { | |
61 | dev_err(sdev->dev, "invalid interface type %u\n", | |
62 | sdev->pdata->iface.interface); | |
63 | return -EINVAL; | |
64 | } | |
65 | ||
66 | sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface]; | |
67 | return 0; | |
68 | } | |
69 | ||
56550d94 | 70 | static int shmob_drm_setup_clocks(struct shmob_drm_device *sdev, |
51c13278 LP |
71 | enum shmob_drm_clk_source clksrc) |
72 | { | |
73 | struct clk *clk; | |
74 | char *clkname; | |
75 | ||
76 | switch (clksrc) { | |
77 | case SHMOB_DRM_CLK_BUS: | |
78 | clkname = "bus_clk"; | |
79 | sdev->lddckr = LDDCKR_ICKSEL_BUS; | |
80 | break; | |
81 | case SHMOB_DRM_CLK_PERIPHERAL: | |
82 | clkname = "peripheral_clk"; | |
83 | sdev->lddckr = LDDCKR_ICKSEL_MIPI; | |
84 | break; | |
85 | case SHMOB_DRM_CLK_EXTERNAL: | |
86 | clkname = NULL; | |
87 | sdev->lddckr = LDDCKR_ICKSEL_HDMI; | |
88 | break; | |
89 | default: | |
90 | return -EINVAL; | |
91 | } | |
92 | ||
93 | clk = clk_get(sdev->dev, clkname); | |
94 | if (IS_ERR(clk)) { | |
95 | dev_err(sdev->dev, "cannot get dot clock %s\n", clkname); | |
96 | return PTR_ERR(clk); | |
97 | } | |
98 | ||
99 | sdev->clock = clk; | |
100 | return 0; | |
101 | } | |
102 | ||
103 | /* ----------------------------------------------------------------------------- | |
104 | * DRM operations | |
105 | */ | |
106 | ||
107 | static int shmob_drm_unload(struct drm_device *dev) | |
108 | { | |
109 | struct shmob_drm_device *sdev = dev->dev_private; | |
110 | ||
111 | drm_kms_helper_poll_fini(dev); | |
112 | drm_mode_config_cleanup(dev); | |
113 | drm_vblank_cleanup(dev); | |
114 | drm_irq_uninstall(dev); | |
115 | ||
116 | if (sdev->clock) | |
117 | clk_put(sdev->clock); | |
118 | ||
119 | if (sdev->mmio) | |
120 | iounmap(sdev->mmio); | |
121 | ||
122 | dev->dev_private = NULL; | |
123 | kfree(sdev); | |
124 | ||
125 | return 0; | |
126 | } | |
127 | ||
128 | static int shmob_drm_load(struct drm_device *dev, unsigned long flags) | |
129 | { | |
130 | struct shmob_drm_platform_data *pdata = dev->dev->platform_data; | |
131 | struct platform_device *pdev = dev->platformdev; | |
132 | struct shmob_drm_device *sdev; | |
133 | struct resource *res; | |
134 | unsigned int i; | |
135 | int ret; | |
136 | ||
137 | if (pdata == NULL) { | |
138 | dev_err(dev->dev, "no platform data\n"); | |
139 | return -EINVAL; | |
140 | } | |
141 | ||
142 | sdev = kzalloc(sizeof(*sdev), GFP_KERNEL); | |
143 | if (sdev == NULL) { | |
144 | dev_err(dev->dev, "failed to allocate private data\n"); | |
145 | return -ENOMEM; | |
146 | } | |
147 | ||
148 | sdev->dev = &pdev->dev; | |
149 | sdev->pdata = pdata; | |
150 | spin_lock_init(&sdev->irq_lock); | |
151 | ||
152 | sdev->ddev = dev; | |
153 | dev->dev_private = sdev; | |
154 | ||
155 | /* I/O resources and clocks */ | |
156 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
157 | if (res == NULL) { | |
158 | dev_err(&pdev->dev, "failed to get memory resource\n"); | |
159 | ret = -EINVAL; | |
160 | goto done; | |
161 | } | |
162 | ||
163 | sdev->mmio = ioremap_nocache(res->start, resource_size(res)); | |
164 | if (sdev->mmio == NULL) { | |
165 | dev_err(&pdev->dev, "failed to remap memory resource\n"); | |
166 | ret = -ENOMEM; | |
167 | goto done; | |
168 | } | |
169 | ||
170 | ret = shmob_drm_setup_clocks(sdev, pdata->clk_source); | |
171 | if (ret < 0) | |
172 | goto done; | |
173 | ||
174 | ret = shmob_drm_init_interface(sdev); | |
175 | if (ret < 0) | |
176 | goto done; | |
177 | ||
178 | ret = shmob_drm_modeset_init(sdev); | |
179 | if (ret < 0) { | |
180 | dev_err(&pdev->dev, "failed to initialize mode setting\n"); | |
181 | goto done; | |
182 | } | |
183 | ||
184 | for (i = 0; i < 4; ++i) { | |
185 | ret = shmob_drm_plane_create(sdev, i); | |
186 | if (ret < 0) { | |
187 | dev_err(&pdev->dev, "failed to create plane %u\n", i); | |
188 | goto done; | |
189 | } | |
190 | } | |
191 | ||
192 | ret = drm_vblank_init(dev, 1); | |
193 | if (ret < 0) { | |
194 | dev_err(&pdev->dev, "failed to initialize vblank\n"); | |
195 | goto done; | |
196 | } | |
197 | ||
198 | ret = drm_irq_install(dev); | |
199 | if (ret < 0) { | |
200 | dev_err(&pdev->dev, "failed to install IRQ handler\n"); | |
201 | goto done; | |
202 | } | |
203 | ||
a16d4f86 TR |
204 | platform_set_drvdata(pdev, sdev); |
205 | ||
51c13278 LP |
206 | done: |
207 | if (ret) | |
208 | shmob_drm_unload(dev); | |
209 | ||
210 | return ret; | |
211 | } | |
212 | ||
213 | static void shmob_drm_preclose(struct drm_device *dev, struct drm_file *file) | |
214 | { | |
215 | struct shmob_drm_device *sdev = dev->dev_private; | |
216 | ||
217 | shmob_drm_crtc_cancel_page_flip(&sdev->crtc, file); | |
218 | } | |
219 | ||
220 | static irqreturn_t shmob_drm_irq(int irq, void *arg) | |
221 | { | |
222 | struct drm_device *dev = arg; | |
223 | struct shmob_drm_device *sdev = dev->dev_private; | |
224 | unsigned long flags; | |
225 | u32 status; | |
226 | ||
227 | /* Acknowledge interrupts. Putting interrupt enable and interrupt flag | |
228 | * bits in the same register is really brain-dead design and requires | |
229 | * taking a spinlock. | |
230 | */ | |
231 | spin_lock_irqsave(&sdev->irq_lock, flags); | |
232 | status = lcdc_read(sdev, LDINTR); | |
233 | lcdc_write(sdev, LDINTR, status ^ LDINTR_STATUS_MASK); | |
234 | spin_unlock_irqrestore(&sdev->irq_lock, flags); | |
235 | ||
236 | if (status & LDINTR_VES) { | |
237 | drm_handle_vblank(dev, 0); | |
238 | shmob_drm_crtc_finish_page_flip(&sdev->crtc); | |
239 | } | |
240 | ||
241 | return IRQ_HANDLED; | |
242 | } | |
243 | ||
244 | static int shmob_drm_enable_vblank(struct drm_device *dev, int crtc) | |
245 | { | |
246 | struct shmob_drm_device *sdev = dev->dev_private; | |
247 | ||
248 | shmob_drm_crtc_enable_vblank(sdev, true); | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | static void shmob_drm_disable_vblank(struct drm_device *dev, int crtc) | |
254 | { | |
255 | struct shmob_drm_device *sdev = dev->dev_private; | |
256 | ||
257 | shmob_drm_crtc_enable_vblank(sdev, false); | |
258 | } | |
259 | ||
260 | static const struct file_operations shmob_drm_fops = { | |
261 | .owner = THIS_MODULE, | |
262 | .open = drm_open, | |
263 | .release = drm_release, | |
264 | .unlocked_ioctl = drm_ioctl, | |
265 | #ifdef CONFIG_COMPAT | |
266 | .compat_ioctl = drm_compat_ioctl, | |
267 | #endif | |
268 | .poll = drm_poll, | |
269 | .read = drm_read, | |
270 | .fasync = drm_fasync, | |
271 | .llseek = no_llseek, | |
272 | .mmap = drm_gem_cma_mmap, | |
273 | }; | |
274 | ||
275 | static struct drm_driver shmob_drm_driver = { | |
276 | .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET, | |
277 | .load = shmob_drm_load, | |
278 | .unload = shmob_drm_unload, | |
279 | .preclose = shmob_drm_preclose, | |
280 | .irq_handler = shmob_drm_irq, | |
281 | .get_vblank_counter = drm_vblank_count, | |
282 | .enable_vblank = shmob_drm_enable_vblank, | |
283 | .disable_vblank = shmob_drm_disable_vblank, | |
284 | .gem_free_object = drm_gem_cma_free_object, | |
285 | .gem_vm_ops = &drm_gem_cma_vm_ops, | |
286 | .dumb_create = drm_gem_cma_dumb_create, | |
287 | .dumb_map_offset = drm_gem_cma_dumb_map_offset, | |
288 | .dumb_destroy = drm_gem_cma_dumb_destroy, | |
289 | .fops = &shmob_drm_fops, | |
290 | .name = "shmob-drm", | |
291 | .desc = "Renesas SH Mobile DRM", | |
292 | .date = "20120424", | |
293 | .major = 1, | |
294 | .minor = 0, | |
295 | }; | |
296 | ||
297 | /* ----------------------------------------------------------------------------- | |
298 | * Power management | |
299 | */ | |
300 | ||
301 | #if CONFIG_PM_SLEEP | |
302 | static int shmob_drm_pm_suspend(struct device *dev) | |
303 | { | |
a16d4f86 | 304 | struct shmob_drm_device *sdev = dev_get_drvdata(dev); |
51c13278 | 305 | |
a16d4f86 | 306 | drm_kms_helper_poll_disable(sdev->ddev); |
51c13278 LP |
307 | shmob_drm_crtc_suspend(&sdev->crtc); |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
312 | static int shmob_drm_pm_resume(struct device *dev) | |
313 | { | |
a16d4f86 | 314 | struct shmob_drm_device *sdev = dev_get_drvdata(dev); |
51c13278 | 315 | |
b13f5980 | 316 | drm_modeset_lock_all(sdev->ddev); |
51c13278 | 317 | shmob_drm_crtc_resume(&sdev->crtc); |
b13f5980 | 318 | drm_modeset_unlock_all(sdev->ddev); |
51c13278 LP |
319 | |
320 | drm_kms_helper_poll_enable(sdev->ddev); | |
321 | return 0; | |
322 | } | |
323 | #endif | |
324 | ||
325 | static const struct dev_pm_ops shmob_drm_pm_ops = { | |
326 | SET_SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume) | |
327 | }; | |
328 | ||
329 | /* ----------------------------------------------------------------------------- | |
330 | * Platform driver | |
331 | */ | |
332 | ||
56550d94 | 333 | static int shmob_drm_probe(struct platform_device *pdev) |
51c13278 LP |
334 | { |
335 | return drm_platform_init(&shmob_drm_driver, pdev); | |
336 | } | |
337 | ||
56550d94 | 338 | static int shmob_drm_remove(struct platform_device *pdev) |
51c13278 LP |
339 | { |
340 | drm_platform_exit(&shmob_drm_driver, pdev); | |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
345 | static struct platform_driver shmob_drm_platform_driver = { | |
346 | .probe = shmob_drm_probe, | |
56550d94 | 347 | .remove = shmob_drm_remove, |
51c13278 LP |
348 | .driver = { |
349 | .owner = THIS_MODULE, | |
350 | .name = "shmob-drm", | |
351 | .pm = &shmob_drm_pm_ops, | |
352 | }, | |
353 | }; | |
354 | ||
355 | module_platform_driver(shmob_drm_platform_driver); | |
356 | ||
357 | MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); | |
358 | MODULE_DESCRIPTION("Renesas SH Mobile DRM Driver"); | |
359 | MODULE_LICENSE("GPL"); |