summaryrefslogtreecommitdiffstats
path: root/sound/hda/ext/hdac_ext_controller.c
blob: 358f16195483f6b51c3a84a3cff672d8696951a6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
/*
 *  hdac-ext-controller.c - HD-audio extended controller functions.
 *
 *  Copyright (C) 2014-2015 Intel Corp
 *  Author: Jeeja KP <jeeja.kp@intel.com>
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/delay.h>
#include <linux/slab.h>
#include <sound/hda_register.h>
#include <sound/hdaudio_ext.h>

/*
 * maximum HDAC capablities we should parse to avoid endless looping:
 * currently we have 4 extended caps, so this is future proof for now.
 * extend when this limit is seen meeting in real HW
 */
#define HDAC_MAX_CAPS 10

/**
 * snd_hdac_ext_bus_parse_capabilities - parse capablity structure
 * @ebus: the pointer to extended bus object
 *
 * Returns 0 if successful, or a negative error code.
 */
int snd_hdac_ext_bus_parse_capabilities(struct hdac_ext_bus *ebus)
{
	unsigned int cur_cap;
	unsigned int offset;
	struct hdac_bus *bus = &ebus->bus;
	unsigned int counter = 0;

	offset = snd_hdac_chip_readl(bus, LLCH);

	/* Lets walk the linked capabilities list */
	do {
		cur_cap = _snd_hdac_chip_read(l, bus, offset);

		dev_dbg(bus->dev, "Capability version: 0x%x\n",
				((cur_cap & AZX_CAP_HDR_VER_MASK) >> AZX_CAP_HDR_VER_OFF));

		dev_dbg(bus->dev, "HDA capability ID: 0x%x\n",
				(cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF);

		switch ((cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF) {
		case AZX_ML_CAP_ID:
			dev_dbg(bus->dev, "Found ML capability\n");
			ebus->mlcap = bus->remap_addr + offset;
			break;

		case AZX_GTS_CAP_ID:
			dev_dbg(bus->dev, "Found GTS capability offset=%x\n", offset);
			ebus->gtscap = bus->remap_addr + offset;
			break;

		case AZX_PP_CAP_ID:
			/* PP capability found, the Audio DSP is present */
			dev_dbg(bus->dev, "Found PP capability offset=%x\n", offset);
			ebus->ppcap = bus->remap_addr + offset;
			break;

		case AZX_SPB_CAP_ID:
			/* SPIB capability found, handler function */
			dev_dbg(bus->dev, "Found SPB capability\n");
			ebus->spbcap = bus->remap_addr + offset;
			break;

		default:
			dev_dbg(bus->dev, "Unknown capability %d\n", cur_cap);
			break;
		}

		counter++;

		if (counter > HDAC_MAX_CAPS) {
			dev_err(bus->dev, "We exceeded HDAC Ext capablities!!!\n");
			break;
		}

		/* read the offset of next capabiity */
		offset = cur_cap & AZX_CAP_HDR_NXT_PTR_MASK;

	} while (offset);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_parse_capabilities);

/*
 * processing pipe helpers - these helpers are useful for dealing with HDA
 * new capability of processing pipelines
 */

/**
 * snd_hdac_ext_bus_ppcap_enable - enable/disable processing pipe capability
 * @ebus: HD-audio extended core bus
 * @enable: flag to turn on/off the capability
 */
void snd_hdac_ext_bus_ppcap_enable(struct hdac_ext_bus *ebus, bool enable)
{
	struct hdac_bus *bus = &ebus->bus;

	if (!ebus->ppcap) {
		dev_err(bus->dev, "Address of PP capability is NULL");
		return;
	}

	if (enable)
		snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, 0, AZX_PPCTL_GPROCEN);
	else
		snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, AZX_PPCTL_GPROCEN, 0);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_ppcap_enable);

/**
 * snd_hdac_ext_bus_ppcap_int_enable - ppcap interrupt enable/disable
 * @ebus: HD-audio extended core bus
 * @enable: flag to enable/disable interrupt
 */
void snd_hdac_ext_bus_ppcap_int_enable(struct hdac_ext_bus *ebus, bool enable)
{
	struct hdac_bus *bus = &ebus->bus;

	if (!ebus->ppcap) {
		dev_err(bus->dev, "Address of PP capability is NULL\n");
		return;
	}

	if (enable)
		snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, 0, AZX_PPCTL_PIE);
	else
		snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, AZX_PPCTL_PIE, 0);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_ppcap_int_enable);

/*
 * Multilink helpers - these helpers are useful for dealing with HDA
 * new multilink capability
 */

/**
 * snd_hdac_ext_bus_get_ml_capabilities - get multilink capability
 * @ebus: HD-audio extended core bus
 *
 * This will parse all links and read the mlink capabilities and add them
 * in hlink_list of extended hdac bus
 * Note: this will be freed on bus exit by driver
 */
int snd_hdac_ext_bus_get_ml_capabilities(struct hdac_ext_bus *ebus)
{
	int idx;
	u32 link_count;
	struct hdac_ext_link *hlink;
	struct hdac_bus *bus = &ebus->bus;

	link_count = readl(ebus->mlcap + AZX_REG_ML_MLCD) + 1;

	dev_dbg(bus->dev, "In %s Link count: %d\n", __func__, link_count);

	for (idx = 0; idx < link_count; idx++) {
		hlink  = kzalloc(sizeof(*hlink), GFP_KERNEL);
		if (!hlink)
			return -ENOMEM;
		hlink->index = idx;
		hlink->bus = bus;
		hlink->ml_addr = ebus->mlcap + AZX_ML_BASE +
					(AZX_ML_INTERVAL * idx);
		hlink->lcaps  = snd_hdac_chip_readl(bus, ML_LCAP);
		hlink->lsdiid = snd_hdac_chip_readw(bus, ML_LSDIID);

		list_add_tail(&hlink->list, &ebus->hlink_list);
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_ml_capabilities);

/**
 * snd_hdac_link_free_all- free hdac extended link objects
 *
 * @ebus: HD-audio ext core bus
 */

void snd_hdac_link_free_all(struct hdac_ext_bus *ebus)
{
	struct hdac_ext_link *l;

	while (!list_empty(&ebus->hlink_list)) {
		l = list_first_entry(&ebus->hlink_list, struct hdac_ext_link, list);
		list_del(&l->list);
		kfree(l);
	}
}
EXPORT_SYMBOL_GPL(snd_hdac_link_free_all);

/**
 * snd_hdac_ext_bus_get_link_index - get link based on codec name
 * @ebus: HD-audio extended core bus
 * @codec_name: codec name
 */
struct hdac_ext_link *snd_hdac_ext_bus_get_link(struct hdac_ext_bus *ebus,
						 const char *codec_name)
{
	int i;
	struct hdac_ext_link *hlink = NULL;
	int bus_idx, addr;

	if (sscanf(codec_name, "ehdaudio%dD%d", &bus_idx, &addr) != 2)
		return NULL;
	if (ebus->idx != bus_idx)
		return NULL;

	list_for_each_entry(hlink, &ebus->hlink_list, list) {
		for (i = 0; i < HDA_MAX_CODECS; i++) {
			if (hlink->lsdiid & (0x1 << addr))
				return hlink;
		}
	}

	return NULL;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_link);

static int check_hdac_link_power_active(struct hdac_ext_link *link, bool enable)
{
	int timeout;
	u32 val;
	int mask = (1 << AZX_MLCTL_CPA);

	udelay(3);
	timeout = 50;

	do {
		val = snd_hdac_chip_readl(link->bus, ML_LCTL);
		if (enable) {
			if (((val & mask) >> AZX_MLCTL_CPA))
				return 0;
		} else {
			if (!((val & mask) >> AZX_MLCTL_CPA))
				return 0;
		}
		udelay(3);
	} while (--timeout);

	return -EIO;
}

/**
 * snd_hdac_ext_bus_link_power_up -power up hda link
 * @link: HD-audio extended link
 */
int snd_hdac_ext_bus_link_power_up(struct hdac_ext_link *link)
{
	snd_hdac_chip_updatel(link->bus, ML_LCTL, 0, AZX_MLCTL_SPA);

	return check_hdac_link_power_active(link, true);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_up);

/**
 * snd_hdac_ext_bus_link_power_down -power down hda link
 * @link: HD-audio extended link
 */
int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link)
{
	snd_hdac_chip_updatel(link->bus, ML_LCTL, AZX_MLCTL_SPA, 0);

	return check_hdac_link_power_active(link, false);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down);