1/*
  2 * rcar_du_drv.c  --  R-Car Display Unit DRM driver
  3 *
  4 * Copyright (C) 2013 Renesas Corporation
  5 *
  6 * Contact: 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_fb_cma_helper.h>
 25#include <drm/drm_gem_cma_helper.h>
 26
 27#include "rcar_du_crtc.h"
 28#include "rcar_du_drv.h"
 29#include "rcar_du_kms.h"
 30#include "rcar_du_regs.h"
 31
 32/* -----------------------------------------------------------------------------
 33 * DRM operations
 34 */
 35
 36static int rcar_du_unload(struct drm_device *dev)
 37{
 38	struct rcar_du_device *rcdu = dev->dev_private;
 39
 40	if (rcdu->fbdev)
 41		drm_fbdev_cma_fini(rcdu->fbdev);
 42
 43	drm_kms_helper_poll_fini(dev);
 44	drm_mode_config_cleanup(dev);
 45	drm_vblank_cleanup(dev);
 46
 47	dev->irq_enabled = 0;
 48	dev->dev_private = NULL;
 49
 50	return 0;
 51}
 52
 53static int rcar_du_load(struct drm_device *dev, unsigned long flags)
 54{
 55	struct platform_device *pdev = dev->platformdev;
 56	struct rcar_du_platform_data *pdata = pdev->dev.platform_data;
 57	struct rcar_du_device *rcdu;
 58	struct resource *mem;
 59	int ret;
 60
 61	if (pdata == NULL) {
 62		dev_err(dev->dev, "no platform data\n");
 63		return -ENODEV;
 64	}
 65
 66	rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
 67	if (rcdu == NULL) {
 68		dev_err(dev->dev, "failed to allocate private data\n");
 69		return -ENOMEM;
 70	}
 71
 72	rcdu->dev = &pdev->dev;
 73	rcdu->pdata = pdata;
 74	rcdu->info = (struct rcar_du_device_info *)pdev->id_entry->driver_data;
 75	rcdu->ddev = dev;
 76	dev->dev_private = rcdu;
 77
 78	/* I/O resources */
 79	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 80	rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
 81	if (IS_ERR(rcdu->mmio))
 82		return PTR_ERR(rcdu->mmio);
 83
 84	/* DRM/KMS objects */
 85	ret = rcar_du_modeset_init(rcdu);
 86	if (ret < 0) {
 87		dev_err(&pdev->dev, "failed to initialize DRM/KMS\n");
 88		goto done;
 89	}
 90
 91	/* vblank handling */
 92	ret = drm_vblank_init(dev, (1 << rcdu->num_crtcs) - 1);
 93	if (ret < 0) {
 94		dev_err(&pdev->dev, "failed to initialize vblank\n");
 95		goto done;
 96	}
 97
 98	dev->irq_enabled = 1;
 99
100	platform_set_drvdata(pdev, rcdu);
101
102done:
103	if (ret)
104		rcar_du_unload(dev);
105
106	return ret;
107}
108
109static void rcar_du_preclose(struct drm_device *dev, struct drm_file *file)
110{
111	struct rcar_du_device *rcdu = dev->dev_private;
112	unsigned int i;
113
114	for (i = 0; i < rcdu->num_crtcs; ++i)
115		rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
116}
117
118static void rcar_du_lastclose(struct drm_device *dev)
119{
120	struct rcar_du_device *rcdu = dev->dev_private;
121
122	drm_fbdev_cma_restore_mode(rcdu->fbdev);
123}
124
125static int rcar_du_enable_vblank(struct drm_device *dev, int crtc)
126{
127	struct rcar_du_device *rcdu = dev->dev_private;
128
129	rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], true);
130
131	return 0;
132}
133
134static void rcar_du_disable_vblank(struct drm_device *dev, int crtc)
135{
136	struct rcar_du_device *rcdu = dev->dev_private;
137
138	rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], false);
139}
140
141static const struct file_operations rcar_du_fops = {
142	.owner		= THIS_MODULE,
143	.open		= drm_open,
144	.release	= drm_release,
145	.unlocked_ioctl	= drm_ioctl,
146#ifdef CONFIG_COMPAT
147	.compat_ioctl	= drm_compat_ioctl,
148#endif
149	.poll		= drm_poll,
150	.read		= drm_read,
151	.llseek		= no_llseek,
152	.mmap		= drm_gem_cma_mmap,
153};
154
155static struct drm_driver rcar_du_driver = {
156	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME,
157	.load			= rcar_du_load,
158	.unload			= rcar_du_unload,
159	.preclose		= rcar_du_preclose,
160	.lastclose		= rcar_du_lastclose,
161	.get_vblank_counter	= drm_vblank_count,
162	.enable_vblank		= rcar_du_enable_vblank,
163	.disable_vblank		= rcar_du_disable_vblank,
164	.gem_free_object	= drm_gem_cma_free_object,
165	.gem_vm_ops		= &drm_gem_cma_vm_ops,
166	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
167	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
168	.gem_prime_import	= drm_gem_prime_import,
169	.gem_prime_export	= drm_gem_prime_export,
170	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
171	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
172	.gem_prime_vmap		= drm_gem_cma_prime_vmap,
173	.gem_prime_vunmap	= drm_gem_cma_prime_vunmap,
174	.gem_prime_mmap		= drm_gem_cma_prime_mmap,
175	.dumb_create		= rcar_du_dumb_create,
176	.dumb_map_offset	= drm_gem_cma_dumb_map_offset,
177	.dumb_destroy		= drm_gem_dumb_destroy,
178	.fops			= &rcar_du_fops,
179	.name			= "rcar-du",
180	.desc			= "Renesas R-Car Display Unit",
181	.date			= "20130110",
182	.major			= 1,
183	.minor			= 0,
184};
185
186/* -----------------------------------------------------------------------------
187 * Power management
188 */
189
190#if CONFIG_PM_SLEEP
191static int rcar_du_pm_suspend(struct device *dev)
192{
193	struct rcar_du_device *rcdu = dev_get_drvdata(dev);
194
195	drm_kms_helper_poll_disable(rcdu->ddev);
196	/* TODO Suspend the CRTC */
197
198	return 0;
199}
200
201static int rcar_du_pm_resume(struct device *dev)
202{
203	struct rcar_du_device *rcdu = dev_get_drvdata(dev);
204
205	/* TODO Resume the CRTC */
206
207	drm_kms_helper_poll_enable(rcdu->ddev);
208	return 0;
209}
210#endif
211
212static const struct dev_pm_ops rcar_du_pm_ops = {
213	SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
214};
215
216/* -----------------------------------------------------------------------------
217 * Platform driver
218 */
219
220static int rcar_du_probe(struct platform_device *pdev)
221{
222	return drm_platform_init(&rcar_du_driver, pdev);
223}
224
225static int rcar_du_remove(struct platform_device *pdev)
226{
227	struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
228
229	drm_put_dev(rcdu->ddev);
230
231	return 0;
232}
233
234static const struct rcar_du_device_info rcar_du_r8a7779_info = {
235	.features = 0,
236	.num_crtcs = 2,
237	.routes = {
238		/* R8A7779 has two RGB outputs and one (currently unsupported)
239		 * TCON output.
240		 */
241		[RCAR_DU_OUTPUT_DPAD0] = {
242			.possible_crtcs = BIT(0),
243			.encoder_type = DRM_MODE_ENCODER_NONE,
244		},
245		[RCAR_DU_OUTPUT_DPAD1] = {
246			.possible_crtcs = BIT(1) | BIT(0),
247			.encoder_type = DRM_MODE_ENCODER_NONE,
248		},
249	},
250	.num_lvds = 0,
251};
252
253static const struct rcar_du_device_info rcar_du_r8a7790_info = {
254	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
255	.quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
256	.num_crtcs = 3,
257	.routes = {
258		/* R8A7790 has one RGB output, two LVDS outputs and one
259		 * (currently unsupported) TCON output.
260		 */
261		[RCAR_DU_OUTPUT_DPAD0] = {
262			.possible_crtcs = BIT(2) | BIT(1) | BIT(0),
263			.encoder_type = DRM_MODE_ENCODER_NONE,
264		},
265		[RCAR_DU_OUTPUT_LVDS0] = {
266			.possible_crtcs = BIT(0),
267			.encoder_type = DRM_MODE_ENCODER_LVDS,
268		},
269		[RCAR_DU_OUTPUT_LVDS1] = {
270			.possible_crtcs = BIT(2) | BIT(1),
271			.encoder_type = DRM_MODE_ENCODER_LVDS,
272		},
273	},
274	.num_lvds = 2,
275};
276
277static const struct rcar_du_device_info rcar_du_r8a7791_info = {
278	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
279	.num_crtcs = 2,
280	.routes = {
281		/* R8A7791 has one RGB output, one LVDS output and one
282		 * (currently unsupported) TCON output.
283		 */
284		[RCAR_DU_OUTPUT_DPAD0] = {
285			.possible_crtcs = BIT(1),
286			.encoder_type = DRM_MODE_ENCODER_NONE,
287		},
288		[RCAR_DU_OUTPUT_LVDS0] = {
289			.possible_crtcs = BIT(0),
290			.encoder_type = DRM_MODE_ENCODER_LVDS,
291		},
292	},
293	.num_lvds = 1,
294};
295
296static const struct platform_device_id rcar_du_id_table[] = {
297	{ "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info },
298	{ "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info },
299	{ "rcar-du-r8a7791", (kernel_ulong_t)&rcar_du_r8a7791_info },
300	{ }
301};
302
303MODULE_DEVICE_TABLE(platform, rcar_du_id_table);
304
305static struct platform_driver rcar_du_platform_driver = {
306	.probe		= rcar_du_probe,
307	.remove		= rcar_du_remove,
308	.driver		= {
309		.owner	= THIS_MODULE,
310		.name	= "rcar-du",
311		.pm	= &rcar_du_pm_ops,
312	},
313	.id_table	= rcar_du_id_table,
314};
315
316module_platform_driver(rcar_du_platform_driver);
317
318MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
319MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
320MODULE_LICENSE("GPL");