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hc
2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87 
 kernel/sound/hda/ext/hdac_ext_bus.c
....@@ -1,18 +1,10 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  *  hdac-ext-bus.c - HD-audio extended core bus functions.
34  *
45  *  Copyright (C) 2014-2015 Intel Corp
56  *  Author: Jeeja KP <jeeja.kp@intel.com>
67  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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; version 2 of the License.
11
- *
12
- *  This program is distributed in the hope that it will be useful, but
13
- *  WITHOUT ANY WARRANTY; without even the implied warranty of
14
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
- *  General Public License for more details.
168  *
179  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1810  */
....@@ -25,89 +17,32 @@
2517 MODULE_DESCRIPTION("HDA extended core");
2618 MODULE_LICENSE("GPL v2");
2719 
28
-static void hdac_ext_writel(u32 value, u32 __iomem *addr)
29
-{
30
-	writel(value, addr);
31
-}
32
-
33
-static u32 hdac_ext_readl(u32 __iomem *addr)
34
-{
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-	return readl(addr);
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-}
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-
38
-static void hdac_ext_writew(u16 value, u16 __iomem *addr)
39
-{
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-	writew(value, addr);
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-}
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-
43
-static u16 hdac_ext_readw(u16 __iomem *addr)
44
-{
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-	return readw(addr);
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-}
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-
48
-static void hdac_ext_writeb(u8 value, u8 __iomem *addr)
49
-{
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-	writeb(value, addr);
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-}
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-
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-static u8 hdac_ext_readb(u8 __iomem *addr)
54
-{
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-	return readb(addr);
56
-}
57
-
58
-static int hdac_ext_dma_alloc_pages(struct hdac_bus *bus, int type,
59
-			   size_t size, struct snd_dma_buffer *buf)
60
-{
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-	return snd_dma_alloc_pages(type, bus->dev, size, buf);
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-}
63
-
64
-static void hdac_ext_dma_free_pages(struct hdac_bus *bus, struct snd_dma_buffer *buf)
65
-{
66
-	snd_dma_free_pages(buf);
67
-}
68
-
69
-static const struct hdac_io_ops hdac_ext_default_io = {
70
-	.reg_writel = hdac_ext_writel,
71
-	.reg_readl = hdac_ext_readl,
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-	.reg_writew = hdac_ext_writew,
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-	.reg_readw = hdac_ext_readw,
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-	.reg_writeb = hdac_ext_writeb,
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-	.reg_readb = hdac_ext_readb,
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-	.dma_alloc_pages = hdac_ext_dma_alloc_pages,
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-	.dma_free_pages = hdac_ext_dma_free_pages,
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-};
79
-
8020 /**
8121  * snd_hdac_ext_bus_init - initialize a HD-audio extended bus
82
- * @ebus: the pointer to extended bus object
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+ * @bus: the pointer to HDAC bus object
8323  * @dev: device pointer
8424  * @ops: bus verb operators
85
- * @io_ops: lowlevel I/O operators, can be NULL. If NULL core will use
86
- * default ops
25
+ * @ext_ops: operators used for ASoC HDA codec drivers
8726  *
8827  * Returns 0 if successful, or a negative error code.
8928  */
9029 int snd_hdac_ext_bus_init(struct hdac_bus *bus, struct device *dev,
9130 			const struct hdac_bus_ops *ops,
92
-			const struct hdac_io_ops *io_ops,
9331 			const struct hdac_ext_bus_ops *ext_ops)
9432 {
9533 	int ret;
96
-	static int idx;
9734 
98
-	/* check if io ops are provided, if not load the defaults */
99
-	if (io_ops == NULL)
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-		io_ops = &hdac_ext_default_io;
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-
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-	ret = snd_hdac_bus_init(bus, dev, ops, io_ops);
35
+	ret = snd_hdac_bus_init(bus, dev, ops);
10336 	if (ret < 0)
10437 		return ret;
10538 
10639 	bus->ext_ops = ext_ops;
107
-	INIT_LIST_HEAD(&bus->hlink_list);
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-	bus->idx = idx++;
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-
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-	mutex_init(&bus->lock);
40
+	/* FIXME:
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+	 * Currently only one bus is supported, if there is device with more
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+	 * buses, bus->idx should be greater than 0, but there needs to be a
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+	 * reliable way to always assign same number.
44
+	 */
45
+	bus->idx = 0;
11146 	bus->cmd_dma_state = true;
11247 
11348 	return 0;
....@@ -116,7 +51,7 @@
11651 
11752 /**
11853  * snd_hdac_ext_bus_exit - clean up a HD-audio extended bus
119
- * @ebus: the pointer to extended bus object
54
+ * @bus: the pointer to HDAC bus object
12055  */
12156 void snd_hdac_ext_bus_exit(struct hdac_bus *bus)
12257 {
....@@ -127,18 +62,20 @@
12762 
12863 static void default_release(struct device *dev)
12964 {
130
-	snd_hdac_ext_bus_device_exit(container_of(dev, struct hdac_device, dev));
65
+	snd_hdac_ext_bus_device_exit(dev_to_hdac_dev(dev));
13166 }
13267 
13368 /**
13469  * snd_hdac_ext_bus_device_init - initialize the HDA extended codec base device
135
- * @ebus: hdac extended bus to attach to
70
+ * @bus: hdac bus to attach to
13671  * @addr: codec address
72
+ * @hdev: hdac device to init
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+ * @type: codec type (HDAC_DEV_*) to use for this device
13774  *
13875  * Returns zero for success or a negative error code.
13976  */
14077 int snd_hdac_ext_bus_device_init(struct hdac_bus *bus, int addr,
141
-					struct hdac_device *hdev)
78
+				 struct hdac_device *hdev, int type)
14279 {
14380 	char name[15];
14481 	int ret;
....@@ -152,7 +89,7 @@
15289 		dev_err(bus->dev, "device init failed for hdac device\n");
15390 		return ret;
15491 	}
155
-	hdev->type = HDA_DEV_ASOC;
92
+	hdev->type = type;
15693 	hdev->dev.release = default_release;
15794 
15895 	ret = snd_hdac_device_register(hdev);
....@@ -179,7 +116,7 @@
179116 /**
180117  * snd_hdac_ext_bus_device_remove - remove HD-audio extended codec base devices
181118  *
182
- * @ebus: HD-audio extended bus
119
+ * @bus: the pointer to HDAC bus object
183120  */
184121 void snd_hdac_ext_bus_device_remove(struct hdac_bus *bus)
185122 {