forked from ~ljy/RK356X_SDK_RELEASE
blame | history | patch | commit | commitdiff
hc
2024-01-03 2f7c68cb55ecb7331f2381deb497c27155f32faf 
 kernel/drivers/video/fbdev/pxa3xx-gcu.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  *  pxa3xx-gcu.c - Linux kernel module for PXA3xx graphics controllers
34  *
....@@ -7,20 +8,6 @@
78  *  Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
89  *  Copyright (c) 2009 Janine Kropp <nin@directfb.org>
910  *  Copyright (c) 2009 Denis Oliver Kropp <dok@directfb.org>
10
- *
11
- *  This program is free software; you can redistribute it and/or modify
12
- *  it under the terms of the GNU General Public License as published by
13
- *  the Free Software Foundation; either version 2 of the License, or
14
- *  (at your option) any later version.
15
- *
16
- *  This program is distributed in the hope that it will be useful,
17
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
18
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19
- *  GNU General Public License for more details.
20
- *
21
- *  You should have received a copy of the GNU General Public License
22
- *  along with this program; if not, write to the Free Software
23
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
2411  */
2512 
2613 /*
....@@ -49,7 +36,6 @@
4936 #include "pxa3xx-gcu.h"
5037 
5138 #define DRV_NAME	"pxa3xx-gcu"
52
-#define MISCDEV_MINOR	197
5339 
5440 #define REG_GCCR	0x00
5541 #define GCCR_SYNC_CLR	(1 << 9)
....@@ -96,6 +82,7 @@
9682 };
9783 
9884 struct pxa3xx_gcu_priv {
85
+	struct device		 *dev;
9986 	void __iomem		 *mmio_base;
10087 	struct clk		 *clk;
10188 	struct pxa3xx_gcu_shared *shared;
....@@ -394,7 +381,7 @@
394381 	struct pxa3xx_gcu_batch	*buffer;
395382 	struct pxa3xx_gcu_priv *priv = to_pxa3xx_gcu_priv(file);
396383 
397
-	int words = count / 4;
384
+	size_t words = count / 4;
398385 
399386 	/* Does not need to be atomic. There's a lock in user space,
400387 	 * but anyhow, this is just for statistics. */
....@@ -493,7 +480,7 @@
493480 		if (size != SHARED_SIZE)
494481 			return -EINVAL;
495482 
496
-		return dma_mmap_coherent(NULL, vma,
483
+		return dma_mmap_coherent(priv->dev, vma,
497484 			priv->shared, priv->shared_phys, size);
498485 
499486 	case SHARED_SIZE >> PAGE_SHIFT:
....@@ -607,7 +594,7 @@
607594 	 * container_of(). This isn't really necessary as we have a fixed minor
608595 	 * number anyway, but this is to avoid statics. */
609596 
610
-	priv->misc_dev.minor	= MISCDEV_MINOR,
597
+	priv->misc_dev.minor	= PXA3XX_GCU_MINOR,
611598 	priv->misc_dev.name	= DRV_NAME,
612599 	priv->misc_dev.fops	= &pxa3xx_gcu_miscdev_fops;
613600 
....@@ -650,7 +637,7 @@
650637 	ret = misc_register(&priv->misc_dev);
651638 	if (ret < 0) {
652639 		dev_err(dev, "misc_register() for minor %d failed\n",
653
-			MISCDEV_MINOR);
640
+			PXA3XX_GCU_MINOR);
654641 		goto err_free_dma;
655642 	}
656643 
....@@ -663,6 +650,7 @@
663650 	for (i = 0; i < 8; i++) {
664651 		ret = pxa3xx_gcu_add_buffer(dev, priv);
665652 		if (ret) {
653
+			pxa3xx_gcu_free_buffers(dev, priv);
666654 			dev_err(dev, "failed to allocate DMA memory\n");
667655 			goto err_disable_clk;
668656 		}
....@@ -670,6 +658,7 @@
670658 
671659 	platform_set_drvdata(pdev, priv);
672660 	priv->resource_mem = r;
661
+	priv->dev = dev;
673662 	pxa3xx_gcu_reset(priv);
674663 	pxa3xx_gcu_init_debug_timer(priv);
675664 
....@@ -678,15 +667,15 @@
678667 			SHARED_SIZE, irq);
679668 	return 0;
680669 
681
-err_free_dma:
682
-	dma_free_coherent(dev, SHARED_SIZE,
683
-			priv->shared, priv->shared_phys);
670
+err_disable_clk:
671
+	clk_disable_unprepare(priv->clk);
684672 
685673 err_misc_deregister:
686674 	misc_deregister(&priv->misc_dev);
687675 
688
-err_disable_clk:
689
-	clk_disable_unprepare(priv->clk);
676
+err_free_dma:
677
+	dma_free_coherent(dev, SHARED_SIZE,
678
+			  priv->shared, priv->shared_phys);
690679 
691680 	return ret;
692681 }
....@@ -699,6 +688,7 @@
699688 	pxa3xx_gcu_wait_idle(priv);
700689 	misc_deregister(&priv->misc_dev);
701690 	dma_free_coherent(dev, SHARED_SIZE, priv->shared, priv->shared_phys);
691
+	clk_disable_unprepare(priv->clk);
702692 	pxa3xx_gcu_free_buffers(dev, priv);
703693 
704694 	return 0;
....@@ -725,7 +715,7 @@
725715 
726716 MODULE_DESCRIPTION("PXA3xx graphics controller unit driver");
727717 MODULE_LICENSE("GPL");
728
-MODULE_ALIAS_MISCDEV(MISCDEV_MINOR);
718
+MODULE_ALIAS_MISCDEV(PXA3XX_GCU_MINOR);
729719 MODULE_AUTHOR("Janine Kropp <nin@directfb.org>, "
730720 		"Denis Oliver Kropp <dok@directfb.org>, "
731721 		"Daniel Mack <daniel@caiaq.de>");