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0b00a561 JK |
1 | /* |
2 | * hdac-ext-controller.c - HD-audio extended controller functions. | |
3 | * | |
4 | * Copyright (C) 2014-2015 Intel Corp | |
5 | * Author: Jeeja KP <jeeja.kp@intel.com> | |
6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
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. | |
16 | * | |
17 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
18 | */ | |
19 | ||
20 | #include <linux/delay.h> | |
21 | #include <linux/slab.h> | |
22 | #include <sound/hda_register.h> | |
23 | #include <sound/hdaudio_ext.h> | |
24 | ||
25 | /* | |
26 | * maximum HDAC capablities we should parse to avoid endless looping: | |
27 | * currently we have 4 extended caps, so this is future proof for now. | |
28 | * extend when this limit is seen meeting in real HW | |
29 | */ | |
30 | #define HDAC_MAX_CAPS 10 | |
31 | ||
32 | /** | |
33 | * snd_hdac_ext_bus_parse_capabilities - parse capablity structure | |
34 | * @ebus: the pointer to extended bus object | |
35 | * | |
36 | * Returns 0 if successful, or a negative error code. | |
37 | */ | |
38 | int snd_hdac_ext_bus_parse_capabilities(struct hdac_ext_bus *ebus) | |
39 | { | |
40 | unsigned int cur_cap; | |
41 | unsigned int offset; | |
42 | struct hdac_bus *bus = &ebus->bus; | |
43 | unsigned int counter = 0; | |
44 | ||
45 | offset = snd_hdac_chip_readl(bus, LLCH); | |
46 | ||
47 | if (offset < 0) | |
48 | return -EIO; | |
49 | ||
50 | /* Lets walk the linked capabilities list */ | |
51 | do { | |
52 | cur_cap = _snd_hdac_chip_read(l, bus, offset); | |
53 | ||
54 | if (cur_cap < 0) | |
55 | return -EIO; | |
56 | ||
57 | dev_dbg(bus->dev, "Capability version: 0x%x\n", | |
58 | ((cur_cap & AZX_CAP_HDR_VER_MASK) >> AZX_CAP_HDR_VER_OFF)); | |
59 | ||
60 | dev_dbg(bus->dev, "HDA capability ID: 0x%x\n", | |
61 | (cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF); | |
62 | ||
63 | switch ((cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF) { | |
64 | case AZX_ML_CAP_ID: | |
65 | dev_dbg(bus->dev, "Found ML capability\n"); | |
66 | ebus->mlcap = bus->remap_addr + offset; | |
67 | break; | |
68 | ||
69 | case AZX_GTS_CAP_ID: | |
70 | dev_dbg(bus->dev, "Found GTS capability offset=%x\n", offset); | |
71 | ebus->gtscap = bus->remap_addr + offset; | |
72 | break; | |
73 | ||
74 | case AZX_PP_CAP_ID: | |
75 | /* PP capability found, the Audio DSP is present */ | |
76 | dev_dbg(bus->dev, "Found PP capability offset=%x\n", offset); | |
77 | ebus->ppcap = bus->remap_addr + offset; | |
78 | break; | |
79 | ||
80 | case AZX_SPB_CAP_ID: | |
81 | /* SPIB capability found, handler function */ | |
82 | dev_dbg(bus->dev, "Found SPB capability\n"); | |
83 | ebus->spbcap = bus->remap_addr + offset; | |
84 | break; | |
85 | ||
86 | default: | |
87 | dev_dbg(bus->dev, "Unknown capability %d\n", cur_cap); | |
88 | break; | |
89 | } | |
90 | ||
91 | counter++; | |
92 | ||
93 | if (counter > HDAC_MAX_CAPS) { | |
94 | dev_err(bus->dev, "We exceeded HDAC Ext capablities!!!\n"); | |
95 | break; | |
96 | } | |
97 | ||
98 | /* read the offset of next capabiity */ | |
99 | offset = cur_cap & AZX_CAP_HDR_NXT_PTR_MASK; | |
100 | ||
101 | } while (offset); | |
102 | ||
103 | return 0; | |
104 | } | |
105 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_parse_capabilities); | |
106 | ||
107 | /* | |
108 | * processing pipe helpers - these helpers are useful for dealing with HDA | |
109 | * new capability of processing pipelines | |
110 | */ | |
111 | ||
112 | /** | |
113 | * snd_hdac_ext_bus_ppcap_enable - enable/disable processing pipe capability | |
114 | * @ebus: HD-audio extended core bus | |
115 | * @enable: flag to turn on/off the capability | |
116 | */ | |
117 | void snd_hdac_ext_bus_ppcap_enable(struct hdac_ext_bus *ebus, bool enable) | |
118 | { | |
119 | struct hdac_bus *bus = &ebus->bus; | |
120 | ||
121 | if (!ebus->ppcap) { | |
122 | dev_err(bus->dev, "Address of PP capability is NULL"); | |
123 | return; | |
124 | } | |
125 | ||
126 | if (enable) | |
127 | snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, 0, AZX_PPCTL_GPROCEN); | |
128 | else | |
129 | snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, AZX_PPCTL_GPROCEN, 0); | |
130 | } | |
131 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_ppcap_enable); | |
132 | ||
133 | /** | |
134 | * snd_hdac_ext_bus_ppcap_int_enable - ppcap interrupt enable/disable | |
135 | * @ebus: HD-audio extended core bus | |
136 | * @enable: flag to enable/disable interrupt | |
137 | */ | |
138 | void snd_hdac_ext_bus_ppcap_int_enable(struct hdac_ext_bus *ebus, bool enable) | |
139 | { | |
140 | struct hdac_bus *bus = &ebus->bus; | |
141 | ||
142 | if (!ebus->ppcap) { | |
143 | dev_err(bus->dev, "Address of PP capability is NULL\n"); | |
144 | return; | |
145 | } | |
146 | ||
147 | if (enable) | |
148 | snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, 0, AZX_PPCTL_PIE); | |
149 | else | |
150 | snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, AZX_PPCTL_PIE, 0); | |
151 | } | |
152 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_ppcap_int_enable); | |
153 | ||
154 | /* | |
155 | * Multilink helpers - these helpers are useful for dealing with HDA | |
156 | * new multilink capability | |
157 | */ | |
158 | ||
159 | /** | |
160 | * snd_hdac_ext_bus_get_ml_capabilities - get multilink capability | |
161 | * @ebus: HD-audio extended core bus | |
162 | * | |
163 | * This will parse all links and read the mlink capabilities and add them | |
164 | * in hlink_list of extended hdac bus | |
165 | * Note: this will be freed on bus exit by driver | |
166 | */ | |
167 | int snd_hdac_ext_bus_get_ml_capabilities(struct hdac_ext_bus *ebus) | |
168 | { | |
169 | int idx; | |
170 | u32 link_count; | |
171 | struct hdac_ext_link *hlink; | |
172 | struct hdac_bus *bus = &ebus->bus; | |
173 | ||
174 | link_count = readl(ebus->mlcap + AZX_REG_ML_MLCD) + 1; | |
175 | ||
176 | dev_dbg(bus->dev, "In %s Link count: %d\n", __func__, link_count); | |
177 | ||
178 | for (idx = 0; idx < link_count; idx++) { | |
179 | hlink = kzalloc(sizeof(*hlink), GFP_KERNEL); | |
180 | if (!hlink) | |
181 | return -ENOMEM; | |
182 | hlink->index = idx; | |
183 | hlink->bus = bus; | |
184 | hlink->ml_addr = ebus->mlcap + AZX_ML_BASE + | |
185 | (AZX_ML_INTERVAL * idx); | |
186 | hlink->lcaps = snd_hdac_chip_readl(bus, ML_LCAP); | |
187 | hlink->lsdiid = snd_hdac_chip_readw(bus, ML_LSDIID); | |
188 | ||
189 | list_add_tail(&hlink->list, &ebus->hlink_list); | |
190 | } | |
191 | ||
192 | return 0; | |
193 | } | |
194 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_ml_capabilities); | |
195 | ||
196 | /** | |
197 | * snd_hdac_ext_bus_get_link_index - get link based on codec name | |
198 | * @ebus: HD-audio extended core bus | |
199 | * @codec_name: codec name | |
200 | */ | |
201 | struct hdac_ext_link *snd_hdac_ext_bus_get_link(struct hdac_ext_bus *ebus, | |
202 | const char *codec_name) | |
203 | { | |
204 | int i; | |
205 | struct hdac_ext_link *hlink = NULL; | |
206 | int bus_idx, addr; | |
207 | ||
208 | if (sscanf(codec_name, "ehdaudio%dD%d", &bus_idx, &addr) != 2) | |
209 | return NULL; | |
210 | if (ebus->idx != bus_idx) | |
211 | return NULL; | |
212 | ||
213 | list_for_each_entry(hlink, &ebus->hlink_list, list) { | |
214 | for (i = 0; i < HDA_MAX_CODECS; i++) { | |
215 | if (hlink->lsdiid & (0x1 << addr)) | |
216 | return hlink; | |
217 | } | |
218 | } | |
219 | ||
220 | return NULL; | |
221 | } | |
222 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_link); | |
223 | ||
224 | static int check_hdac_link_power_active(struct hdac_ext_link *link, bool enable) | |
225 | { | |
226 | int timeout; | |
227 | u32 val; | |
228 | int mask = (1 << AZX_MLCTL_CPA); | |
229 | ||
230 | udelay(3); | |
231 | timeout = 50; | |
232 | ||
233 | do { | |
234 | val = snd_hdac_chip_readl(link->bus, ML_LCTL); | |
235 | if (enable) { | |
236 | if (((val & mask) >> AZX_MLCTL_CPA)) | |
237 | return 0; | |
238 | } else { | |
239 | if (!((val & mask) >> AZX_MLCTL_CPA)) | |
240 | return 0; | |
241 | } | |
242 | udelay(3); | |
243 | } while (--timeout); | |
244 | ||
245 | return -EIO; | |
246 | } | |
247 | ||
248 | /** | |
249 | * snd_hdac_ext_bus_link_power_up -power up hda link | |
250 | * @link: HD-audio extended link | |
251 | */ | |
252 | int snd_hdac_ext_bus_link_power_up(struct hdac_ext_link *link) | |
253 | { | |
254 | snd_hdac_chip_updatel(link->bus, ML_LCTL, 0, AZX_MLCTL_SPA); | |
255 | ||
256 | return check_hdac_link_power_active(link, true); | |
257 | } | |
258 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_up); | |
259 | ||
260 | /** | |
261 | * snd_hdac_ext_bus_link_power_down -power down hda link | |
262 | * @link: HD-audio extended link | |
263 | */ | |
264 | int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link) | |
265 | { | |
266 | snd_hdac_chip_updatel(link->bus, ML_LCTL, AZX_MLCTL_SPA, 0); | |
267 | ||
268 | return check_hdac_link_power_active(link, false); | |
269 | } | |
270 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down); |